~~~~~~~~~~~~
ACPI 5 introduced two new resources to describe GPIO connections: GpioIo
and GpioInt. These resources are used be used to pass GPIO numbers used by
-the device to the driver. For example:
+the device to the driver. ACPI 5.1 extended this with _DSD (Device
+Specific Data) which made it possible to name the GPIOs among other things.
+For example:
+
+Device (DEV)
+{
Method (_CRS, 0, NotSerialized)
{
Name (SBUF, ResourceTemplate()
Return (SBUF)
}
+ // ACPI 5.1 _DSD used for naming the GPIOs
+ Name (_DSD, Package ()
+ {
+ ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+ Package ()
+ {
+ Package () {"power-gpios", Package() {^DEV, 0, 0, 0 }},
+ Package () {"irq-gpios", Package() {^DEV, 1, 0, 0 }},
+ }
+ })
+ ...
+
These GPIO numbers are controller relative and path "\\_SB.PCI0.GPI0"
specifies the path to the controller. In order to use these GPIOs in Linux
we need to translate them to the corresponding Linux GPIO descriptors.
struct gpio_desc *irq_desc, *power_desc;
- irq_desc = gpiod_get_index(dev, NULL, 1);
+ irq_desc = gpiod_get(dev, "irq");
if (IS_ERR(irq_desc))
/* handle error */
- power_desc = gpiod_get_index(dev, NULL, 0);
+ power_desc = gpiod_get(dev, "power");
if (IS_ERR(power_desc))
/* handle error */
There are also devm_* versions of these functions which release the
descriptors once the device is released.
+See Documentation/acpi/gpio-properties.txt for more information about the
+_DSD binding related to GPIOs.
+
MFD devices
~~~~~~~~~~~
The MFD devices register their children as platform devices. For the child
improve throughput, but will also increase the
amount of memory reserved for use by the client.
+ suspend.pm_test_delay=
+ [SUSPEND]
+ Sets the number of seconds to remain in a suspend test
+ mode before resuming the system (see
+ /sys/power/pm_test). Only available when CONFIG_PM_DEBUG
+ is set. Default value is 5.
+
swapaccount=[0|1]
[KNL] Enable accounting of swap in memory resource
controller if no parameter or 1 is given or disable
# echo platform > /sys/power/disk
# echo disk > /sys/power/state
-Then, the kernel will try to freeze processes, suspend devices, wait 5 seconds,
-resume devices and thaw processes. If "platform" is written to
+Then, the kernel will try to freeze processes, suspend devices, wait a few
+seconds (5 by default, but configurable by the suspend.pm_test_delay module
+parameter), resume devices and thaw processes. If "platform" is written to
/sys/power/pm_test , then after suspending devices the kernel will additionally
invoke the global control methods (eg. ACPI global control methods) used to
-prepare the platform firmware for hibernation. Next, it will wait 5 seconds and
-invoke the platform (eg. ACPI) global methods used to cancel hibernation etc.
+prepare the platform firmware for hibernation. Next, it will wait a
+configurable number of seconds and invoke the platform (eg. ACPI) global
+methods used to cancel hibernation etc.
Writing "none" to /sys/power/pm_test causes the kernel to switch to the normal
hibernation/suspend operations. Also, when open for reading, /sys/power/pm_test
F: drivers/phy/
F: include/linux/phy/
+GENERIC PM DOMAINS
+M: "Rafael J. Wysocki" <rjw@rjwysocki.net>
+M: Kevin Hilman <khilman@kernel.org>
+M: Ulf Hansson <ulf.hansson@linaro.org>
+L: linux-pm@vger.kernel.org
+S: Supported
+F: drivers/base/power/domain*.c
+F: include/linux/pm_domain.h
+
GENERIC UIO DRIVER FOR PCI DEVICES
M: "Michael S. Tsirkin" <mst@redhat.com>
L: kvm@vger.kernel.org
#ifndef __ASM_ARM_CPUIDLE_H
#define __ASM_ARM_CPUIDLE_H
+#include <asm/proc-fns.h>
+
#ifdef CONFIG_CPU_IDLE
extern int arm_cpuidle_simple_enter(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int index);
*/
#define ARM_CPUIDLE_WFI_STATE ARM_CPUIDLE_WFI_STATE_PWR(UINT_MAX)
+struct device_node;
+
+struct cpuidle_ops {
+ int (*suspend)(int cpu, unsigned long arg);
+ int (*init)(struct device_node *, int cpu);
+};
+
+struct of_cpuidle_method {
+ const char *method;
+ struct cpuidle_ops *ops;
+};
+
+#define CPUIDLE_METHOD_OF_DECLARE(name, _method, _ops) \
+ static const struct of_cpuidle_method __cpuidle_method_of_table_##name \
+ __used __section(__cpuidle_method_of_table) \
+ = { .method = _method, .ops = _ops }
+
+extern int arm_cpuidle_suspend(int index);
+
+extern int arm_cpuidle_init(int cpu);
+
#endif
*/
#include <linux/cpuidle.h>
-#include <asm/proc-fns.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <asm/cpuidle.h>
+extern struct of_cpuidle_method __cpuidle_method_of_table[];
+
+static const struct of_cpuidle_method __cpuidle_method_of_table_sentinel
+ __used __section(__cpuidle_method_of_table_end);
+
+static struct cpuidle_ops cpuidle_ops[NR_CPUS];
+
+/**
+ * arm_cpuidle_simple_enter() - a wrapper to cpu_do_idle()
+ * @dev: not used
+ * @drv: not used
+ * @index: not used
+ *
+ * A trivial wrapper to allow the cpu_do_idle function to be assigned as a
+ * cpuidle callback by matching the function signature.
+ *
+ * Returns the index passed as parameter
+ */
int arm_cpuidle_simple_enter(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int index)
{
return index;
}
+
+/**
+ * arm_cpuidle_suspend() - function to enter low power idle states
+ * @index: an integer used as an identifier for the low level PM callbacks
+ *
+ * This function calls the underlying arch specific low level PM code as
+ * registered at the init time.
+ *
+ * Returns -EOPNOTSUPP if no suspend callback is defined, the result of the
+ * callback otherwise.
+ */
+int arm_cpuidle_suspend(int index)
+{
+ int ret = -EOPNOTSUPP;
+ int cpu = smp_processor_id();
+
+ if (cpuidle_ops[cpu].suspend)
+ ret = cpuidle_ops[cpu].suspend(cpu, index);
+
+ return ret;
+}
+
+/**
+ * arm_cpuidle_get_ops() - find a registered cpuidle_ops by name
+ * @method: the method name
+ *
+ * Search in the __cpuidle_method_of_table array the cpuidle ops matching the
+ * method name.
+ *
+ * Returns a struct cpuidle_ops pointer, NULL if not found.
+ */
+static struct cpuidle_ops *__init arm_cpuidle_get_ops(const char *method)
+{
+ struct of_cpuidle_method *m = __cpuidle_method_of_table;
+
+ for (; m->method; m++)
+ if (!strcmp(m->method, method))
+ return m->ops;
+
+ return NULL;
+}
+
+/**
+ * arm_cpuidle_read_ops() - Initialize the cpuidle ops with the device tree
+ * @dn: a pointer to a struct device node corresponding to a cpu node
+ * @cpu: the cpu identifier
+ *
+ * Get the method name defined in the 'enable-method' property, retrieve the
+ * associated cpuidle_ops and do a struct copy. This copy is needed because all
+ * cpuidle_ops are tagged __initdata and will be unloaded after the init
+ * process.
+ *
+ * Return 0 on sucess, -ENOENT if no 'enable-method' is defined, -EOPNOTSUPP if
+ * no cpuidle_ops is registered for the 'enable-method'.
+ */
+static int __init arm_cpuidle_read_ops(struct device_node *dn, int cpu)
+{
+ const char *enable_method;
+ struct cpuidle_ops *ops;
+
+ enable_method = of_get_property(dn, "enable-method", NULL);
+ if (!enable_method)
+ return -ENOENT;
+
+ ops = arm_cpuidle_get_ops(enable_method);
+ if (!ops) {
+ pr_warn("%s: unsupported enable-method property: %s\n",
+ dn->full_name, enable_method);
+ return -EOPNOTSUPP;
+ }
+
+ cpuidle_ops[cpu] = *ops; /* structure copy */
+
+ pr_notice("cpuidle: enable-method property '%s'"
+ " found operations\n", enable_method);
+
+ return 0;
+}
+
+/**
+ * arm_cpuidle_init() - Initialize cpuidle_ops for a specific cpu
+ * @cpu: the cpu to be initialized
+ *
+ * Initialize the cpuidle ops with the device for the cpu and then call
+ * the cpu's idle initialization callback. This may fail if the underlying HW
+ * is not operational.
+ *
+ * Returns:
+ * 0 on success,
+ * -ENODEV if it fails to find the cpu node in the device tree,
+ * -EOPNOTSUPP if it does not find a registered cpuidle_ops for this cpu,
+ * -ENOENT if it fails to find an 'enable-method' property,
+ * -ENXIO if the HW reports a failure or a misconfiguration,
+ * -ENOMEM if the HW report an memory allocation failure
+ */
+int __init arm_cpuidle_init(int cpu)
+{
+ struct device_node *cpu_node = of_cpu_device_node_get(cpu);
+ int ret;
+
+ if (!cpu_node)
+ return -ENODEV;
+
+ ret = arm_cpuidle_read_ops(cpu_node, cpu);
+ if (!ret && cpuidle_ops[cpu].init)
+ ret = cpuidle_ops[cpu].init(cpu_node, cpu);
+
+ of_node_put(cpu_node);
+
+ return ret;
+}
#include <linux/cpuidle.h>
#include <linux/io.h>
#include <linux/export.h>
-#include <asm/proc-fns.h>
#include <asm/cpuidle.h>
#include <mach/cpuidle.h>
#include <linux/cpuidle.h>
#include <linux/module.h>
#include <asm/cpuidle.h>
-#include <asm/proc-fns.h>
#include "common.h"
#include "cpuidle.h"
#include <linux/cpuidle.h>
#include <linux/module.h>
#include <asm/cpuidle.h>
-#include <asm/proc-fns.h>
#include "common.h"
#include "cpuidle.h"
#include <linux/cpu_pm.h>
#include <linux/module.h>
#include <asm/cpuidle.h>
-#include <asm/proc-fns.h>
#include <asm/suspend.h>
#include "common.h"
#include <linux/tick.h>
#include <asm/cpuidle.h>
-#include <asm/proc-fns.h>
#include "common.h"
#include "pm.h"
#include <linux/export.h>
#include <linux/time.h>
-#include <asm/proc-fns.h>
+#include <asm/cpuidle.h>
#include <mach/map.h>
#include <linux/module.h>
#include <asm/cpuidle.h>
-#include <asm/proc-fns.h>
#include <asm/smp_plat.h>
#include <asm/suspend.h>
#include <linux/module.h>
#include <asm/cpuidle.h>
-#include <asm/proc-fns.h>
#include <asm/smp_plat.h>
#include <asm/suspend.h>
# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
CONFIG_COMPAT=y
CONFIG_CPU_IDLE=y
-CONFIG_ARM64_CPUIDLE=y
+CONFIG_ARM_CPUIDLE=y
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_UNIX=y
#include <asm/proc-fns.h>
#ifdef CONFIG_CPU_IDLE
-extern int cpu_init_idle(unsigned int cpu);
+extern int arm_cpuidle_init(unsigned int cpu);
extern int cpu_suspend(unsigned long arg);
#else
-static inline int cpu_init_idle(unsigned int cpu)
+static inline int arm_cpuidle_init(unsigned int cpu)
{
return -EOPNOTSUPP;
}
return -EOPNOTSUPP;
}
#endif
-
+static inline int arm_cpuidle_suspend(int index)
+{
+ return cpu_suspend(index);
+}
#endif
#include <asm/cpuidle.h>
#include <asm/cpu_ops.h>
-int cpu_init_idle(unsigned int cpu)
+int arm_cpuidle_init(unsigned int cpu)
{
int ret = -EOPNOTSUPP;
struct device_node *cpu_node = of_cpu_device_node_get(cpu);
--- /dev/null
+#ifndef _ASM_X86_PM_TRACE_H
+#define _ASM_X86_PM_TRACE_H
+
+#include <asm/asm.h>
+
+#define TRACE_RESUME(user) \
+do { \
+ if (pm_trace_enabled) { \
+ const void *tracedata; \
+ asm volatile(_ASM_MOV " $1f,%0\n" \
+ ".section .tracedata,\"a\"\n" \
+ "1:\t.word %c1\n\t" \
+ _ASM_PTR " %c2\n" \
+ ".previous" \
+ :"=r" (tracedata) \
+ : "i" (__LINE__), "i" (__FILE__)); \
+ generate_pm_trace(tracedata, user); \
+ } \
+} while (0)
+
+#define TRACE_SUSPEND(user) TRACE_RESUME(user)
+
+#endif /* _ASM_X86_PM_TRACE_H */
+++ /dev/null
-#ifndef _ASM_X86_RESUME_TRACE_H
-#define _ASM_X86_RESUME_TRACE_H
-
-#include <asm/asm.h>
-
-#define TRACE_RESUME(user) \
-do { \
- if (pm_trace_enabled) { \
- const void *tracedata; \
- asm volatile(_ASM_MOV " $1f,%0\n" \
- ".section .tracedata,\"a\"\n" \
- "1:\t.word %c1\n\t" \
- _ASM_PTR " %c2\n" \
- ".previous" \
- :"=r" (tracedata) \
- : "i" (__LINE__), "i" (__FILE__)); \
- generate_resume_trace(tracedata, user); \
- } \
-} while (0)
-
-#endif /* _ASM_X86_RESUME_TRACE_H */
pdevinfo.id = -1;
pdevinfo.res = resources;
pdevinfo.num_res = count;
- pdevinfo.acpi_node.companion = adev;
+ pdevinfo.fwnode = acpi_fwnode_handle(adev);
pdevinfo.dma_mask = DMA_BIT_MASK(32);
pdev = platform_device_register_full(&pdevinfo);
if (IS_ERR(pdev))
battery->rate_now != ACPI_BATTERY_VALUE_UNKNOWN &&
(s16)(battery->rate_now) < 0) {
battery->rate_now = abs((s16)battery->rate_now);
- printk_once(KERN_WARNING FW_BUG "battery: (dis)charge rate"
- " invalid.\n");
+ printk_once(KERN_WARNING FW_BUG
+ "battery: (dis)charge rate invalid.\n");
}
if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)
},
{
.callback = dmi_disable_osi_vista,
+ .ident = "VGN-SR19XN",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR19XN"),
+ },
+ },
+ {
+ .callback = dmi_disable_osi_vista,
.ident = "Toshiba Satellite L355",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
memset(&pdevinfo, 0, sizeof(pdevinfo));
pdevinfo.name = "dock";
pdevinfo.id = dock_station_count;
- pdevinfo.acpi_node.companion = adev;
+ pdevinfo.fwnode = acpi_fwnode_handle(adev);
pdevinfo.data = &ds;
pdevinfo.size_data = sizeof(ds);
dd = platform_device_register_full(&pdevinfo);
static int EC_FLAGS_CLEAR_ON_RESUME; /* Needs acpi_ec_clear() on boot/resume */
static int EC_FLAGS_QUERY_HANDSHAKE; /* Needs QR_EC issued when SCI_EVT set */
+/* --------------------------------------------------------------------------
+ * Logging/Debugging
+ * -------------------------------------------------------------------------- */
+
+/*
+ * Splitters used by the developers to track the boundary of the EC
+ * handling processes.
+ */
+#ifdef DEBUG
+#define EC_DBG_SEP " "
+#define EC_DBG_DRV "+++++"
+#define EC_DBG_STM "====="
+#define EC_DBG_REQ "*****"
+#define EC_DBG_EVT "#####"
+#else
+#define EC_DBG_SEP ""
+#define EC_DBG_DRV
+#define EC_DBG_STM
+#define EC_DBG_REQ
+#define EC_DBG_EVT
+#endif
+
+#define ec_log_raw(fmt, ...) \
+ pr_info(fmt "\n", ##__VA_ARGS__)
+#define ec_dbg_raw(fmt, ...) \
+ pr_debug(fmt "\n", ##__VA_ARGS__)
+#define ec_log(filter, fmt, ...) \
+ ec_log_raw(filter EC_DBG_SEP fmt EC_DBG_SEP filter, ##__VA_ARGS__)
+#define ec_dbg(filter, fmt, ...) \
+ ec_dbg_raw(filter EC_DBG_SEP fmt EC_DBG_SEP filter, ##__VA_ARGS__)
+
+#define ec_log_drv(fmt, ...) \
+ ec_log(EC_DBG_DRV, fmt, ##__VA_ARGS__)
+#define ec_dbg_drv(fmt, ...) \
+ ec_dbg(EC_DBG_DRV, fmt, ##__VA_ARGS__)
+#define ec_dbg_stm(fmt, ...) \
+ ec_dbg(EC_DBG_STM, fmt, ##__VA_ARGS__)
+#define ec_dbg_req(fmt, ...) \
+ ec_dbg(EC_DBG_REQ, fmt, ##__VA_ARGS__)
+#define ec_dbg_evt(fmt, ...) \
+ ec_dbg(EC_DBG_EVT, fmt, ##__VA_ARGS__)
+#define ec_dbg_ref(ec, fmt, ...) \
+ ec_dbg_raw("%lu: " fmt, ec->reference_count, ## __VA_ARGS__)
+
/* --------------------------------------------------------------------------
* Device Flags
* -------------------------------------------------------------------------- */
{
u8 x = inb(ec->command_addr);
- pr_debug("EC_SC(R) = 0x%2.2x "
- "SCI_EVT=%d BURST=%d CMD=%d IBF=%d OBF=%d\n",
- x,
- !!(x & ACPI_EC_FLAG_SCI),
- !!(x & ACPI_EC_FLAG_BURST),
- !!(x & ACPI_EC_FLAG_CMD),
- !!(x & ACPI_EC_FLAG_IBF),
- !!(x & ACPI_EC_FLAG_OBF));
+ ec_dbg_raw("EC_SC(R) = 0x%2.2x "
+ "SCI_EVT=%d BURST=%d CMD=%d IBF=%d OBF=%d",
+ x,
+ !!(x & ACPI_EC_FLAG_SCI),
+ !!(x & ACPI_EC_FLAG_BURST),
+ !!(x & ACPI_EC_FLAG_CMD),
+ !!(x & ACPI_EC_FLAG_IBF),
+ !!(x & ACPI_EC_FLAG_OBF));
return x;
}
u8 x = inb(ec->data_addr);
ec->curr->timestamp = jiffies;
- pr_debug("EC_DATA(R) = 0x%2.2x\n", x);
+ ec_dbg_raw("EC_DATA(R) = 0x%2.2x", x);
return x;
}
static inline void acpi_ec_write_cmd(struct acpi_ec *ec, u8 command)
{
- pr_debug("EC_SC(W) = 0x%2.2x\n", command);
+ ec_dbg_raw("EC_SC(W) = 0x%2.2x", command);
outb(command, ec->command_addr);
ec->curr->timestamp = jiffies;
}
static inline void acpi_ec_write_data(struct acpi_ec *ec, u8 data)
{
- pr_debug("EC_DATA(W) = 0x%2.2x\n", data);
+ ec_dbg_raw("EC_DATA(W) = 0x%2.2x", data);
outb(data, ec->data_addr);
ec->curr->timestamp = jiffies;
}
* software need to manually trigger a pseudo GPE event on
* EN=1 writes.
*/
- pr_debug("***** Polling quirk *****\n");
+ ec_dbg_raw("Polling quirk");
advance_transaction(ec);
}
}
{
if (!test_bit(flag, &ec->flags)) {
acpi_ec_disable_gpe(ec, false);
- pr_debug("+++++ Polling enabled +++++\n");
+ ec_dbg_drv("Polling enabled");
set_bit(flag, &ec->flags);
}
}
if (test_bit(flag, &ec->flags)) {
clear_bit(flag, &ec->flags);
acpi_ec_enable_gpe(ec, false);
- pr_debug("+++++ Polling disabled +++++\n");
+ ec_dbg_drv("Polling disabled");
}
}
static void acpi_ec_submit_query(struct acpi_ec *ec)
{
if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags)) {
- pr_debug("***** Event started *****\n");
+ ec_dbg_req("Event started");
schedule_work(&ec->work);
}
}
{
if (ec->curr->command == ACPI_EC_COMMAND_QUERY) {
clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags);
- pr_debug("***** Event stopped *****\n");
+ ec_dbg_req("Event stopped");
}
}
u8 status;
bool wakeup = false;
- pr_debug("===== %s (%d) =====\n",
- in_interrupt() ? "IRQ" : "TASK", smp_processor_id());
+ ec_dbg_stm("%s (%d)", in_interrupt() ? "IRQ" : "TASK",
+ smp_processor_id());
/*
* By always clearing STS before handling all indications, we can
* ensure a hardware STS 0->1 change after this clearing can always
if (t->rlen == t->ri) {
t->flags |= ACPI_EC_COMMAND_COMPLETE;
if (t->command == ACPI_EC_COMMAND_QUERY)
- pr_debug("***** Command(%s) hardware completion *****\n",
- acpi_ec_cmd_string(t->command));
+ ec_dbg_req("Command(%s) hardware completion",
+ acpi_ec_cmd_string(t->command));
wakeup = true;
}
} else
acpi_ec_complete_query(ec);
t->rdata[t->ri++] = 0x00;
t->flags |= ACPI_EC_COMMAND_COMPLETE;
- pr_debug("***** Command(%s) software completion *****\n",
- acpi_ec_cmd_string(t->command));
+ ec_dbg_req("Command(%s) software completion",
+ acpi_ec_cmd_string(t->command));
wakeup = true;
} else if ((status & ACPI_EC_FLAG_IBF) == 0) {
acpi_ec_write_cmd(ec, t->command);
ret = -EINVAL;
goto unlock;
}
+ ec_dbg_ref(ec, "Increase command");
/* following two actions should be kept atomic */
ec->curr = t;
- pr_debug("***** Command(%s) started *****\n",
- acpi_ec_cmd_string(t->command));
+ ec_dbg_req("Command(%s) started", acpi_ec_cmd_string(t->command));
start_transaction(ec);
spin_unlock_irqrestore(&ec->lock, tmp);
ret = ec_poll(ec);
spin_lock_irqsave(&ec->lock, tmp);
if (t->irq_count == ec_storm_threshold)
acpi_ec_clear_storm(ec, EC_FLAGS_COMMAND_STORM);
- pr_debug("***** Command(%s) stopped *****\n",
- acpi_ec_cmd_string(t->command));
+ ec_dbg_req("Command(%s) stopped", acpi_ec_cmd_string(t->command));
ec->curr = NULL;
/* Disable GPE for command processing (IBF=0/OBF=1) */
acpi_ec_complete_request(ec);
+ ec_dbg_ref(ec, "Decrease command");
unlock:
spin_unlock_irqrestore(&ec->lock, tmp);
return ret;
spin_lock_irqsave(&ec->lock, flags);
if (!test_and_set_bit(EC_FLAGS_STARTED, &ec->flags)) {
- pr_debug("+++++ Starting EC +++++\n");
+ ec_dbg_drv("Starting EC");
/* Enable GPE for event processing (SCI_EVT=1) */
- if (!resuming)
+ if (!resuming) {
acpi_ec_submit_request(ec);
- pr_debug("EC started\n");
+ ec_dbg_ref(ec, "Increase driver");
+ }
+ ec_log_drv("EC started");
}
spin_unlock_irqrestore(&ec->lock, flags);
}
spin_lock_irqsave(&ec->lock, flags);
if (acpi_ec_started(ec)) {
- pr_debug("+++++ Stopping EC +++++\n");
+ ec_dbg_drv("Stopping EC");
set_bit(EC_FLAGS_STOPPED, &ec->flags);
spin_unlock_irqrestore(&ec->lock, flags);
wait_event(ec->wait, acpi_ec_stopped(ec));
spin_lock_irqsave(&ec->lock, flags);
/* Disable GPE for event processing (SCI_EVT=1) */
- if (!suspending)
+ if (!suspending) {
acpi_ec_complete_request(ec);
+ ec_dbg_ref(ec, "Decrease driver");
+ }
clear_bit(EC_FLAGS_STARTED, &ec->flags);
clear_bit(EC_FLAGS_STOPPED, &ec->flags);
- pr_debug("EC stopped\n");
+ ec_log_drv("EC stopped");
}
spin_unlock_irqrestore(&ec->lock, flags);
}
if (!handler)
return;
- pr_debug("##### Query(0x%02x) started #####\n", handler->query_bit);
+ ec_dbg_evt("Query(0x%02x) started", handler->query_bit);
if (handler->func)
handler->func(handler->data);
else if (handler->handle)
acpi_evaluate_object(handler->handle, NULL, NULL, NULL);
- pr_debug("##### Query(0x%02x) stopped #####\n", handler->query_bit);
+ ec_dbg_evt("Query(0x%02x) stopped", handler->query_bit);
acpi_ec_put_query_handler(handler);
}
if (value == handler->query_bit) {
/* have custom handler for this bit */
handler = acpi_ec_get_query_handler(handler);
- pr_debug("##### Query(0x%02x) scheduled #####\n",
- handler->query_bit);
+ ec_dbg_evt("Query(0x%02x) scheduled",
+ handler->query_bit);
status = acpi_os_execute((handler->func) ?
OSL_NOTIFY_HANDLER : OSL_GPE_HANDLER,
acpi_ec_run, handler);
ret = ec_install_handlers(ec);
+ /* Reprobe devices depending on the EC */
+ acpi_walk_dep_device_list(ec->handle);
+
/* EC is fully operational, allow queries */
clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags);
unsigned int node_id;
int retval = -EINVAL;
- if (ACPI_COMPANION(dev)) {
+ if (has_acpi_companion(dev)) {
if (acpi_dev) {
dev_warn(dev, "ACPI companion already set\n");
return -EINVAL;
list_add(&physical_node->node, physnode_list);
acpi_dev->physical_node_count++;
- if (!ACPI_COMPANION(dev))
+ if (!has_acpi_companion(dev))
ACPI_COMPANION_SET(dev, acpi_dev);
acpi_physnode_link_name(physical_node_name, node_id);
}
module_init(intel_crc_pmic_opregion_driver_init);
-MODULE_DESCRIPTION("CrystalCove ACPI opration region driver");
+MODULE_DESCRIPTION("CrystalCove ACPI operation region driver");
MODULE_LICENSE("GPL");
return 0;
}
-/*
+/**
+ * create_pnp_modalias - Create hid/cid(s) string for modalias and uevent
+ * @acpi_dev: ACPI device object.
+ * @modalias: Buffer to print into.
+ * @size: Size of the buffer.
+ *
* Creates hid/cid(s) string needed for modalias and uevent
* e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get:
* char *modalias: "acpi:IBM0001:ACPI0001"
* -EINVAL: output error
* -ENOMEM: output is truncated
*/
-static int create_modalias(struct acpi_device *acpi_dev, char *modalias,
- int size)
+static int create_pnp_modalias(struct acpi_device *acpi_dev, char *modalias,
+ int size)
{
int len;
int count;
struct acpi_hardware_id *id;
- if (list_empty(&acpi_dev->pnp.ids))
- return 0;
-
/*
- * If the device has PRP0001 we expose DT compatible modalias
- * instead in form of of:NnameTCcompatible.
+ * Since we skip PRP0001 from the modalias below, 0 should be returned
+ * if PRP0001 is the only ACPI/PNP ID in the device's list.
*/
- if (acpi_dev->data.of_compatible) {
- struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER };
- const union acpi_object *of_compatible, *obj;
- int i, nval;
- char *c;
-
- acpi_get_name(acpi_dev->handle, ACPI_SINGLE_NAME, &buf);
- /* DT strings are all in lower case */
- for (c = buf.pointer; *c != '\0'; c++)
- *c = tolower(*c);
-
- len = snprintf(modalias, size, "of:N%sT", (char *)buf.pointer);
- ACPI_FREE(buf.pointer);
-
- of_compatible = acpi_dev->data.of_compatible;
- if (of_compatible->type == ACPI_TYPE_PACKAGE) {
- nval = of_compatible->package.count;
- obj = of_compatible->package.elements;
- } else { /* Must be ACPI_TYPE_STRING. */
- nval = 1;
- obj = of_compatible;
- }
- for (i = 0; i < nval; i++, obj++) {
- count = snprintf(&modalias[len], size, "C%s",
- obj->string.pointer);
- if (count < 0)
- return -EINVAL;
- if (count >= size)
- return -ENOMEM;
-
- len += count;
- size -= count;
- }
- } else {
- len = snprintf(modalias, size, "acpi:");
- size -= len;
+ count = 0;
+ list_for_each_entry(id, &acpi_dev->pnp.ids, list)
+ if (strcmp(id->id, "PRP0001"))
+ count++;
- list_for_each_entry(id, &acpi_dev->pnp.ids, list) {
- count = snprintf(&modalias[len], size, "%s:", id->id);
- if (count < 0)
- return -EINVAL;
- if (count >= size)
- return -ENOMEM;
- len += count;
- size -= count;
- }
+ if (!count)
+ return 0;
+
+ len = snprintf(modalias, size, "acpi:");
+ if (len <= 0)
+ return len;
+
+ size -= len;
+
+ list_for_each_entry(id, &acpi_dev->pnp.ids, list) {
+ if (!strcmp(id->id, "PRP0001"))
+ continue;
+
+ count = snprintf(&modalias[len], size, "%s:", id->id);
+ if (count < 0)
+ return -EINVAL;
+
+ if (count >= size)
+ return -ENOMEM;
+
+ len += count;
+ size -= count;
+ }
+ modalias[len] = '\0';
+ return len;
+}
+
+/**
+ * create_of_modalias - Creates DT compatible string for modalias and uevent
+ * @acpi_dev: ACPI device object.
+ * @modalias: Buffer to print into.
+ * @size: Size of the buffer.
+ *
+ * Expose DT compatible modalias as of:NnameTCcompatible. This function should
+ * only be called for devices having PRP0001 in their list of ACPI/PNP IDs.
+ */
+static int create_of_modalias(struct acpi_device *acpi_dev, char *modalias,
+ int size)
+{
+ struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER };
+ const union acpi_object *of_compatible, *obj;
+ int len, count;
+ int i, nval;
+ char *c;
+
+ acpi_get_name(acpi_dev->handle, ACPI_SINGLE_NAME, &buf);
+ /* DT strings are all in lower case */
+ for (c = buf.pointer; *c != '\0'; c++)
+ *c = tolower(*c);
+
+ len = snprintf(modalias, size, "of:N%sT", (char *)buf.pointer);
+ ACPI_FREE(buf.pointer);
+
+ if (len <= 0)
+ return len;
+
+ of_compatible = acpi_dev->data.of_compatible;
+ if (of_compatible->type == ACPI_TYPE_PACKAGE) {
+ nval = of_compatible->package.count;
+ obj = of_compatible->package.elements;
+ } else { /* Must be ACPI_TYPE_STRING. */
+ nval = 1;
+ obj = of_compatible;
}
+ for (i = 0; i < nval; i++, obj++) {
+ count = snprintf(&modalias[len], size, "C%s",
+ obj->string.pointer);
+ if (count < 0)
+ return -EINVAL;
+ if (count >= size)
+ return -ENOMEM;
+
+ len += count;
+ size -= count;
+ }
modalias[len] = '\0';
return len;
}
*
* Check if the given device has an ACPI companion and if that companion has
* a valid list of PNP IDs, and if the device is the first (primary) physical
- * device associated with it.
+ * device associated with it. Return the companion pointer if that's the case
+ * or NULL otherwise.
*
* If multiple physical devices are attached to a single ACPI companion, we need
* to be careful. The usage scenario for this kind of relationship is that all
* resources available from it but they will be matched normally using functions
* provided by their bus types (and analogously for their modalias).
*/
-static bool acpi_companion_match(const struct device *dev)
+static struct acpi_device *acpi_companion_match(const struct device *dev)
{
struct acpi_device *adev;
- bool ret;
+ struct mutex *physical_node_lock;
adev = ACPI_COMPANION(dev);
if (!adev)
- return false;
+ return NULL;
if (list_empty(&adev->pnp.ids))
- return false;
+ return NULL;
- mutex_lock(&adev->physical_node_lock);
+ physical_node_lock = &adev->physical_node_lock;
+ mutex_lock(physical_node_lock);
if (list_empty(&adev->physical_node_list)) {
- ret = false;
+ adev = NULL;
} else {
const struct acpi_device_physical_node *node;
node = list_first_entry(&adev->physical_node_list,
struct acpi_device_physical_node, node);
- ret = node->dev == dev;
+ if (node->dev != dev)
+ adev = NULL;
}
- mutex_unlock(&adev->physical_node_lock);
+ mutex_unlock(physical_node_lock);
- return ret;
+ return adev;
}
-/*
- * Creates uevent modalias field for ACPI enumerated devices.
- * Because the other buses does not support ACPI HIDs & CIDs.
- * e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get:
- * "acpi:IBM0001:ACPI0001"
- */
-int acpi_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env)
+static int __acpi_device_uevent_modalias(struct acpi_device *adev,
+ struct kobj_uevent_env *env)
{
int len;
- if (!acpi_companion_match(dev))
+ if (!adev)
return -ENODEV;
+ if (list_empty(&adev->pnp.ids))
+ return 0;
+
if (add_uevent_var(env, "MODALIAS="))
return -ENOMEM;
- len = create_modalias(ACPI_COMPANION(dev), &env->buf[env->buflen - 1],
- sizeof(env->buf) - env->buflen);
- if (len <= 0)
+
+ len = create_pnp_modalias(adev, &env->buf[env->buflen - 1],
+ sizeof(env->buf) - env->buflen);
+ if (len < 0)
+ return len;
+
+ env->buflen += len;
+ if (!adev->data.of_compatible)
+ return 0;
+
+ if (len > 0 && add_uevent_var(env, "MODALIAS="))
+ return -ENOMEM;
+
+ len = create_of_modalias(adev, &env->buf[env->buflen - 1],
+ sizeof(env->buf) - env->buflen);
+ if (len < 0)
return len;
+
env->buflen += len;
+
return 0;
}
-EXPORT_SYMBOL_GPL(acpi_device_uevent_modalias);
/*
- * Creates modalias sysfs attribute for ACPI enumerated devices.
+ * Creates uevent modalias field for ACPI enumerated devices.
* Because the other buses does not support ACPI HIDs & CIDs.
* e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get:
* "acpi:IBM0001:ACPI0001"
*/
-int acpi_device_modalias(struct device *dev, char *buf, int size)
+int acpi_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env)
{
- int len;
+ return __acpi_device_uevent_modalias(acpi_companion_match(dev), env);
+}
+EXPORT_SYMBOL_GPL(acpi_device_uevent_modalias);
- if (!acpi_companion_match(dev))
+static int __acpi_device_modalias(struct acpi_device *adev, char *buf, int size)
+{
+ int len, count;
+
+ if (!adev)
return -ENODEV;
- len = create_modalias(ACPI_COMPANION(dev), buf, size -1);
- if (len <= 0)
+ if (list_empty(&adev->pnp.ids))
+ return 0;
+
+ len = create_pnp_modalias(adev, buf, size - 1);
+ if (len < 0) {
+ return len;
+ } else if (len > 0) {
+ buf[len++] = '\n';
+ size -= len;
+ }
+ if (!adev->data.of_compatible)
return len;
- buf[len++] = '\n';
+
+ count = create_of_modalias(adev, buf + len, size - 1);
+ if (count < 0) {
+ return count;
+ } else if (count > 0) {
+ len += count;
+ buf[len++] = '\n';
+ }
+
return len;
}
+
+/*
+ * Creates modalias sysfs attribute for ACPI enumerated devices.
+ * Because the other buses does not support ACPI HIDs & CIDs.
+ * e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get:
+ * "acpi:IBM0001:ACPI0001"
+ */
+int acpi_device_modalias(struct device *dev, char *buf, int size)
+{
+ return __acpi_device_modalias(acpi_companion_match(dev), buf, size);
+}
EXPORT_SYMBOL_GPL(acpi_device_modalias);
static ssize_t
acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) {
- struct acpi_device *acpi_dev = to_acpi_device(dev);
- int len;
-
- len = create_modalias(acpi_dev, buf, 1024);
- if (len <= 0)
- return len;
- buf[len++] = '\n';
- return len;
+ return __acpi_device_modalias(to_acpi_device(dev), buf, 1024);
}
static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL);
ACPI Bus operations
-------------------------------------------------------------------------- */
+/**
+ * acpi_of_match_device - Match device object using the "compatible" property.
+ * @adev: ACPI device object to match.
+ * @of_match_table: List of device IDs to match against.
+ *
+ * If @dev has an ACPI companion which has the special PRP0001 device ID in its
+ * list of identifiers and a _DSD object with the "compatible" property, use
+ * that property to match against the given list of identifiers.
+ */
+static bool acpi_of_match_device(struct acpi_device *adev,
+ const struct of_device_id *of_match_table)
+{
+ const union acpi_object *of_compatible, *obj;
+ int i, nval;
+
+ if (!adev)
+ return false;
+
+ of_compatible = adev->data.of_compatible;
+ if (!of_match_table || !of_compatible)
+ return false;
+
+ if (of_compatible->type == ACPI_TYPE_PACKAGE) {
+ nval = of_compatible->package.count;
+ obj = of_compatible->package.elements;
+ } else { /* Must be ACPI_TYPE_STRING. */
+ nval = 1;
+ obj = of_compatible;
+ }
+ /* Now we can look for the driver DT compatible strings */
+ for (i = 0; i < nval; i++, obj++) {
+ const struct of_device_id *id;
+
+ for (id = of_match_table; id->compatible[0]; id++)
+ if (!strcasecmp(obj->string.pointer, id->compatible))
+ return true;
+ }
+
+ return false;
+}
+
static const struct acpi_device_id *__acpi_match_device(
- struct acpi_device *device, const struct acpi_device_id *ids)
+ struct acpi_device *device,
+ const struct acpi_device_id *ids,
+ const struct of_device_id *of_ids)
{
const struct acpi_device_id *id;
struct acpi_hardware_id *hwid;
* If the device is not present, it is unnecessary to load device
* driver for it.
*/
- if (!device->status.present)
+ if (!device || !device->status.present)
return NULL;
- for (id = ids; id->id[0]; id++)
- list_for_each_entry(hwid, &device->pnp.ids, list)
+ list_for_each_entry(hwid, &device->pnp.ids, list) {
+ /* First, check the ACPI/PNP IDs provided by the caller. */
+ for (id = ids; id->id[0]; id++)
if (!strcmp((char *) id->id, hwid->id))
return id;
+ /*
+ * Next, check the special "PRP0001" ID and try to match the
+ * "compatible" property if found.
+ *
+ * The id returned by the below is not valid, but the only
+ * caller passing non-NULL of_ids here is only interested in
+ * whether or not the return value is NULL.
+ */
+ if (!strcmp("PRP0001", hwid->id)
+ && acpi_of_match_device(device, of_ids))
+ return id;
+ }
return NULL;
}
const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
const struct device *dev)
{
- struct acpi_device *adev;
- acpi_handle handle = ACPI_HANDLE(dev);
-
- if (!ids || !handle || acpi_bus_get_device(handle, &adev))
- return NULL;
-
- if (!acpi_companion_match(dev))
- return NULL;
-
- return __acpi_match_device(adev, ids);
+ return __acpi_match_device(acpi_companion_match(dev), ids, NULL);
}
EXPORT_SYMBOL_GPL(acpi_match_device);
int acpi_match_device_ids(struct acpi_device *device,
const struct acpi_device_id *ids)
{
- return __acpi_match_device(device, ids) ? 0 : -ENOENT;
+ return __acpi_match_device(device, ids, NULL) ? 0 : -ENOENT;
}
EXPORT_SYMBOL(acpi_match_device_ids);
-/* Performs match against special "PRP0001" shoehorn ACPI ID */
-static bool acpi_of_driver_match_device(struct device *dev,
- const struct device_driver *drv)
-{
- const union acpi_object *of_compatible, *obj;
- struct acpi_device *adev;
- int i, nval;
-
- adev = ACPI_COMPANION(dev);
- if (!adev)
- return false;
-
- of_compatible = adev->data.of_compatible;
- if (!drv->of_match_table || !of_compatible)
- return false;
-
- if (of_compatible->type == ACPI_TYPE_PACKAGE) {
- nval = of_compatible->package.count;
- obj = of_compatible->package.elements;
- } else { /* Must be ACPI_TYPE_STRING. */
- nval = 1;
- obj = of_compatible;
- }
- /* Now we can look for the driver DT compatible strings */
- for (i = 0; i < nval; i++, obj++) {
- const struct of_device_id *id;
-
- for (id = drv->of_match_table; id->compatible[0]; id++)
- if (!strcasecmp(obj->string.pointer, id->compatible))
- return true;
- }
-
- return false;
-}
-
bool acpi_driver_match_device(struct device *dev,
const struct device_driver *drv)
{
if (!drv->acpi_match_table)
- return acpi_of_driver_match_device(dev, drv);
+ return acpi_of_match_device(ACPI_COMPANION(dev),
+ drv->of_match_table);
- return !!acpi_match_device(drv->acpi_match_table, dev);
+ return !!__acpi_match_device(acpi_companion_match(dev),
+ drv->acpi_match_table, drv->of_match_table);
}
EXPORT_SYMBOL_GPL(acpi_driver_match_device);
static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env)
{
- struct acpi_device *acpi_dev = to_acpi_device(dev);
- int len;
-
- if (list_empty(&acpi_dev->pnp.ids))
- return 0;
-
- if (add_uevent_var(env, "MODALIAS="))
- return -ENOMEM;
- len = create_modalias(acpi_dev, &env->buf[env->buflen - 1],
- sizeof(env->buf) - env->buflen);
- if (len <= 0)
- return len;
- env->buflen += len;
- return 0;
+ return __acpi_device_uevent_modalias(to_acpi_device(dev), env);
}
static void acpi_device_notify(acpi_handle handle, u32 event, void *data)
acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device);
}
-static acpi_status acpi_device_fixed_event(void *data)
+static u32 acpi_device_fixed_event(void *data)
{
acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_device_notify_fixed, data);
- return AE_OK;
+ return ACPI_INTERRUPT_HANDLED;
}
static int acpi_device_install_notify_handler(struct acpi_device *device)
static int acpi_freeze_prepare(void)
{
+ acpi_enable_wakeup_devices(ACPI_STATE_S0);
acpi_enable_all_wakeup_gpes();
acpi_os_wait_events_complete();
enable_irq_wake(acpi_gbl_FADT.sci_interrupt);
static void acpi_freeze_restore(void)
{
+ acpi_disable_wakeup_devices(ACPI_STATE_S0);
disable_irq_wake(acpi_gbl_FADT.sci_interrupt);
acpi_enable_all_runtime_gpes();
}
static inline void acpi_sleep_hibernate_setup(void) {}
#endif /* !CONFIG_HIBERNATION */
-int acpi_suspend(u32 acpi_state)
-{
- suspend_state_t states[] = {
- [1] = PM_SUSPEND_STANDBY,
- [3] = PM_SUSPEND_MEM,
- [5] = PM_SUSPEND_MAX
- };
-
- if (acpi_state < 6 && states[acpi_state])
- return pm_suspend(states[acpi_state]);
- if (acpi_state == 4)
- return hibernate();
- return -EINVAL;
-}
-
static void acpi_power_off_prepare(void)
{
/* Prepare to power off the system */
-extern int acpi_suspend(u32 state);
-
extern void acpi_enable_wakeup_devices(u8 sleep_state);
extern void acpi_disable_wakeup_devices(u8 sleep_state);
acpi_irq_not_handled;
all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
acpi_gpe_count;
- size = sprintf(buf, "%8d", all_counters[index].count);
+ size = sprintf(buf, "%8u", all_counters[index].count);
/* "gpe_all" or "sci" */
if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
* For Windows 8 systems: used to decide if video module
* should skip registering backlight interface of its own.
*/
-static int use_native_backlight_param = -1;
+enum {
+ NATIVE_BACKLIGHT_NOT_SET = -1,
+ NATIVE_BACKLIGHT_OFF,
+ NATIVE_BACKLIGHT_ON,
+};
+
+static int use_native_backlight_param = NATIVE_BACKLIGHT_NOT_SET;
module_param_named(use_native_backlight, use_native_backlight_param, int, 0444);
-static bool use_native_backlight_dmi = true;
+static int use_native_backlight_dmi = NATIVE_BACKLIGHT_NOT_SET;
static int register_count;
static struct mutex video_list_lock;
static bool acpi_video_use_native_backlight(void)
{
- if (use_native_backlight_param != -1)
+ if (use_native_backlight_param != NATIVE_BACKLIGHT_NOT_SET)
return use_native_backlight_param;
- else
+ else if (use_native_backlight_dmi != NATIVE_BACKLIGHT_NOT_SET)
return use_native_backlight_dmi;
+ return acpi_osi_is_win8();
}
bool acpi_video_verify_backlight_support(void)
{
- if (acpi_osi_is_win8() && acpi_video_use_native_backlight() &&
+ if (acpi_video_use_native_backlight() &&
backlight_device_registered(BACKLIGHT_RAW))
return false;
return acpi_video_backlight_support();
static int __init video_disable_native_backlight(const struct dmi_system_id *d)
{
- use_native_backlight_dmi = false;
+ use_native_backlight_dmi = NATIVE_BACKLIGHT_OFF;
+ return 0;
+}
+
+static int __init video_enable_native_backlight(const struct dmi_system_id *d)
+{
+ use_native_backlight_dmi = NATIVE_BACKLIGHT_ON;
return 0;
}
DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"),
},
},
+
+ /* Non win8 machines which need native backlight nevertheless */
+ {
+ /* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */
+ .callback = video_enable_native_backlight,
+ .ident = "Lenovo Ideapad Z570",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "102434U"),
+ },
+ },
{}
};
DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5737"),
},
},
- {
- .callback = video_detect_force_vendor,
- .ident = "Lenovo IdeaPad Z570",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
- DMI_MATCH(DMI_PRODUCT_VERSION, "Ideapad Z570"),
- },
- },
{ },
};
.remove = isapnp_remove_one,
};
-static int __init isapnp_init(void)
-{
- return pnp_register_driver(&isapnp_driver);
-}
-
-static void __exit isapnp_exit(void)
-{
- pnp_unregister_driver(&isapnp_driver);
-}
-
+module_pnp_driver(isapnp_driver);
MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("low-level driver for ISA PnP ATA");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);
-
-module_init(isapnp_init);
-module_exit(isapnp_exit);
#include <linux/device.h>
#include <linux/err.h>
+#include <linux/fwnode.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
define_dev_printk_level(_dev_info, KERN_INFO);
#endif
+
+static inline bool fwnode_is_primary(struct fwnode_handle *fwnode)
+{
+ return fwnode && !IS_ERR(fwnode->secondary);
+}
+
+/**
+ * set_primary_fwnode - Change the primary firmware node of a given device.
+ * @dev: Device to handle.
+ * @fwnode: New primary firmware node of the device.
+ *
+ * Set the device's firmware node pointer to @fwnode, but if a secondary
+ * firmware node of the device is present, preserve it.
+ */
+void set_primary_fwnode(struct device *dev, struct fwnode_handle *fwnode)
+{
+ if (fwnode) {
+ struct fwnode_handle *fn = dev->fwnode;
+
+ if (fwnode_is_primary(fn))
+ fn = fn->secondary;
+
+ fwnode->secondary = fn;
+ dev->fwnode = fwnode;
+ } else {
+ dev->fwnode = fwnode_is_primary(dev->fwnode) ?
+ dev->fwnode->secondary : NULL;
+ }
+}
+EXPORT_SYMBOL_GPL(set_primary_fwnode);
+
+/**
+ * set_secondary_fwnode - Change the secondary firmware node of a given device.
+ * @dev: Device to handle.
+ * @fwnode: New secondary firmware node of the device.
+ *
+ * If a primary firmware node of the device is present, set its secondary
+ * pointer to @fwnode. Otherwise, set the device's firmware node pointer to
+ * @fwnode.
+ */
+void set_secondary_fwnode(struct device *dev, struct fwnode_handle *fwnode)
+{
+ if (fwnode)
+ fwnode->secondary = ERR_PTR(-ENODEV);
+
+ if (fwnode_is_primary(dev->fwnode))
+ dev->fwnode->secondary = fwnode;
+ else
+ dev->fwnode = fwnode;
+}
goto probe_failed;
}
+ if (dev->pm_domain && dev->pm_domain->activate) {
+ ret = dev->pm_domain->activate(dev);
+ if (ret)
+ goto probe_failed;
+ }
+
if (dev->bus->probe) {
ret = dev->bus->probe(dev);
if (ret)
goto probe_failed;
}
+ if (dev->pm_domain && dev->pm_domain->sync)
+ dev->pm_domain->sync(dev);
+
driver_bound(dev);
ret = 1;
pr_debug("bus: '%s': %s: bound device %s to driver %s\n",
driver_sysfs_remove(dev);
dev->driver = NULL;
dev_set_drvdata(dev, NULL);
+ if (dev->pm_domain && dev->pm_domain->dismiss)
+ dev->pm_domain->dismiss(dev);
switch (ret) {
case -EPROBE_DEFER:
devres_release_all(dev);
dev->driver = NULL;
dev_set_drvdata(dev, NULL);
+ if (dev->pm_domain && dev->pm_domain->dismiss)
+ dev->pm_domain->dismiss(dev);
+
klist_remove(&dev->p->knode_driver);
if (dev->bus)
blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
goto err_alloc;
pdev->dev.parent = pdevinfo->parent;
- ACPI_COMPANION_SET(&pdev->dev, pdevinfo->acpi_node.companion);
+ pdev->dev.fwnode = pdevinfo->fwnode;
if (pdevinfo->dma_mask) {
/*
return genpd;
}
-struct generic_pm_domain *dev_to_genpd(struct device *dev)
+/*
+ * Get the generic PM domain for a particular struct device.
+ * This validates the struct device pointer, the PM domain pointer,
+ * and checks that the PM domain pointer is a real generic PM domain.
+ * Any failure results in NULL being returned.
+ */
+struct generic_pm_domain *pm_genpd_lookup_dev(struct device *dev)
+{
+ struct generic_pm_domain *genpd = NULL, *gpd;
+
+ if (IS_ERR_OR_NULL(dev) || IS_ERR_OR_NULL(dev->pm_domain))
+ return NULL;
+
+ mutex_lock(&gpd_list_lock);
+ list_for_each_entry(gpd, &gpd_list, gpd_list_node) {
+ if (&gpd->domain == dev->pm_domain) {
+ genpd = gpd;
+ break;
+ }
+ }
+ mutex_unlock(&gpd_list_lock);
+
+ return genpd;
+}
+
+/*
+ * This should only be used where we are certain that the pm_domain
+ * attached to the device is a genpd domain.
+ */
+static struct generic_pm_domain *dev_to_genpd(struct device *dev)
{
if (IS_ERR_OR_NULL(dev->pm_domain))
return ERR_PTR(-EINVAL);
genpd->power_on_latency_ns = elapsed_ns;
genpd->max_off_time_changed = true;
genpd_recalc_cpu_exit_latency(genpd);
- pr_warn("%s: Power-%s latency exceeded, new value %lld ns\n",
- genpd->name, "on", elapsed_ns);
+ pr_debug("%s: Power-%s latency exceeded, new value %lld ns\n",
+ genpd->name, "on", elapsed_ns);
return ret;
}
genpd->power_off_latency_ns = elapsed_ns;
genpd->max_off_time_changed = true;
- pr_warn("%s: Power-%s latency exceeded, new value %lld ns\n",
- genpd->name, "off", elapsed_ns);
+ pr_debug("%s: Power-%s latency exceeded, new value %lld ns\n",
+ genpd->name, "off", elapsed_ns);
return ret;
}
dev_dbg(dev, "%s()\n", __func__);
- if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(dev)
- || IS_ERR_OR_NULL(dev->pm_domain)
- || pd_to_genpd(dev->pm_domain) != genpd)
+ if (!genpd || genpd != pm_genpd_lookup_dev(dev))
return -EINVAL;
/* The above validation also means we have existing domain_data. */
*/
static void genpd_dev_pm_detach(struct device *dev, bool power_off)
{
- struct generic_pm_domain *pd = NULL, *gpd;
+ struct generic_pm_domain *pd;
int ret = 0;
- if (!dev->pm_domain)
- return;
-
- mutex_lock(&gpd_list_lock);
- list_for_each_entry(gpd, &gpd_list, gpd_list_node) {
- if (&gpd->domain == dev->pm_domain) {
- pd = gpd;
- break;
- }
- }
- mutex_unlock(&gpd_list_lock);
-
+ pd = pm_genpd_lookup_dev(dev);
if (!pd)
return;
genpd_queue_power_off_work(pd);
}
+static void genpd_dev_pm_sync(struct device *dev)
+{
+ struct generic_pm_domain *pd;
+
+ pd = dev_to_genpd(dev);
+ if (IS_ERR(pd))
+ return;
+
+ genpd_queue_power_off_work(pd);
+}
+
/**
* genpd_dev_pm_attach - Attach a device to its PM domain using DT.
* @dev: Device to attach.
}
dev->pm_domain->detach = genpd_dev_pm_detach;
+ dev->pm_domain->sync = genpd_dev_pm_sync;
pm_genpd_poweron(pd);
return 0;
#include <linux/mutex.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
-#include <linux/resume-trace.h>
+#include <linux/pm-trace.h>
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <linux/async.h>
char *info = NULL;
int error = 0;
+ TRACE_DEVICE(dev);
+ TRACE_SUSPEND(0);
+
if (async_error)
goto Complete;
Complete:
complete_all(&dev->power.completion);
+ TRACE_SUSPEND(error);
return error;
}
{
reinit_completion(&dev->power.completion);
- if (pm_async_enabled && dev->power.async_suspend) {
+ if (is_async(dev)) {
get_device(dev);
async_schedule(async_suspend_noirq, dev);
return 0;
char *info = NULL;
int error = 0;
+ TRACE_DEVICE(dev);
+ TRACE_SUSPEND(0);
+
__pm_runtime_disable(dev, false);
if (async_error)
async_error = error;
Complete:
+ TRACE_SUSPEND(error);
complete_all(&dev->power.completion);
return error;
}
{
reinit_completion(&dev->power.completion);
- if (pm_async_enabled && dev->power.async_suspend) {
+ if (is_async(dev)) {
get_device(dev);
async_schedule(async_suspend_late, dev);
return 0;
int error = 0;
DECLARE_DPM_WATCHDOG_ON_STACK(wd);
+ TRACE_DEVICE(dev);
+ TRACE_SUSPEND(0);
+
dpm_wait_for_children(dev, async);
if (async_error)
if (error)
async_error = error;
+ TRACE_SUSPEND(error);
return error;
}
{
reinit_completion(&dev->power.completion);
- if (pm_async_enabled && dev->power.async_suspend) {
+ if (is_async(dev)) {
get_device(dev);
async_schedule(async_suspend, dev);
return 0;
* devices may be working.
*/
-#include <linux/resume-trace.h>
+#include <linux/pm-trace.h>
#include <linux/export.h>
#include <linux/rtc.h>
* it's not any guarantee, but it's a high _likelihood_ that
* the match is valid).
*/
-void generate_resume_trace(const void *tracedata, unsigned int user)
+void generate_pm_trace(const void *tracedata, unsigned int user)
{
unsigned short lineno = *(unsigned short *)tracedata;
const char *file = *(const char **)(tracedata + 2);
file_hash_value = hash_string(lineno, file, FILEHASH);
set_magic_time(user_hash_value, file_hash_value, dev_hash_value);
}
-EXPORT_SYMBOL(generate_resume_trace);
+EXPORT_SYMBOL(generate_pm_trace);
extern char __tracedata_start, __tracedata_end;
static int show_file_hash(unsigned int value)
* published by the Free Software Foundation.
*/
-#include <linux/property.h>
-#include <linux/export.h>
#include <linux/acpi.h>
+#include <linux/export.h>
+#include <linux/kernel.h>
#include <linux/of.h>
+#include <linux/property.h>
+
+/**
+ * device_add_property_set - Add a collection of properties to a device object.
+ * @dev: Device to add properties to.
+ * @pset: Collection of properties to add.
+ *
+ * Associate a collection of device properties represented by @pset with @dev
+ * as its secondary firmware node.
+ */
+void device_add_property_set(struct device *dev, struct property_set *pset)
+{
+ if (pset)
+ pset->fwnode.type = FWNODE_PDATA;
+
+ set_secondary_fwnode(dev, &pset->fwnode);
+}
+EXPORT_SYMBOL_GPL(device_add_property_set);
+
+static inline bool is_pset(struct fwnode_handle *fwnode)
+{
+ return fwnode && fwnode->type == FWNODE_PDATA;
+}
+
+static inline struct property_set *to_pset(struct fwnode_handle *fwnode)
+{
+ return is_pset(fwnode) ?
+ container_of(fwnode, struct property_set, fwnode) : NULL;
+}
+
+static struct property_entry *pset_prop_get(struct property_set *pset,
+ const char *name)
+{
+ struct property_entry *prop;
+
+ if (!pset || !pset->properties)
+ return NULL;
+
+ for (prop = pset->properties; prop->name; prop++)
+ if (!strcmp(name, prop->name))
+ return prop;
+
+ return NULL;
+}
+
+static int pset_prop_read_array(struct property_set *pset, const char *name,
+ enum dev_prop_type type, void *val, size_t nval)
+{
+ struct property_entry *prop;
+ unsigned int item_size;
+
+ prop = pset_prop_get(pset, name);
+ if (!prop)
+ return -ENODATA;
+
+ if (prop->type != type)
+ return -EPROTO;
+
+ if (!val)
+ return prop->nval;
+
+ if (prop->nval < nval)
+ return -EOVERFLOW;
+
+ switch (type) {
+ case DEV_PROP_U8:
+ item_size = sizeof(u8);
+ break;
+ case DEV_PROP_U16:
+ item_size = sizeof(u16);
+ break;
+ case DEV_PROP_U32:
+ item_size = sizeof(u32);
+ break;
+ case DEV_PROP_U64:
+ item_size = sizeof(u64);
+ break;
+ case DEV_PROP_STRING:
+ item_size = sizeof(const char *);
+ break;
+ default:
+ return -EINVAL;
+ }
+ memcpy(val, prop->value.raw_data, nval * item_size);
+ return 0;
+}
+
+static inline struct fwnode_handle *dev_fwnode(struct device *dev)
+{
+ return IS_ENABLED(CONFIG_OF) && dev->of_node ?
+ &dev->of_node->fwnode : dev->fwnode;
+}
/**
* device_property_present - check if a property of a device is present
*/
bool device_property_present(struct device *dev, const char *propname)
{
- if (IS_ENABLED(CONFIG_OF) && dev->of_node)
- return of_property_read_bool(dev->of_node, propname);
-
- return !acpi_dev_prop_get(ACPI_COMPANION(dev), propname, NULL);
+ return fwnode_property_present(dev_fwnode(dev), propname);
}
EXPORT_SYMBOL_GPL(device_property_present);
else if (is_acpi_node(fwnode))
return !acpi_dev_prop_get(acpi_node(fwnode), propname, NULL);
- return false;
+ return !!pset_prop_get(to_pset(fwnode), propname);
}
EXPORT_SYMBOL_GPL(fwnode_property_present);
-#define OF_DEV_PROP_READ_ARRAY(node, propname, type, val, nval) \
- (val) ? of_property_read_##type##_array((node), (propname), (val), (nval)) \
- : of_property_count_elems_of_size((node), (propname), sizeof(type))
-
-#define DEV_PROP_READ_ARRAY(_dev_, _propname_, _type_, _proptype_, _val_, _nval_) \
- IS_ENABLED(CONFIG_OF) && _dev_->of_node ? \
- (OF_DEV_PROP_READ_ARRAY(_dev_->of_node, _propname_, _type_, \
- _val_, _nval_)) : \
- acpi_dev_prop_read(ACPI_COMPANION(_dev_), _propname_, \
- _proptype_, _val_, _nval_)
-
/**
* device_property_read_u8_array - return a u8 array property of a device
* @dev: Device to get the property of
* @propname: Name of the property
- * @val: The values are stored here
+ * @val: The values are stored here or %NULL to return the number of values
* @nval: Size of the @val array
*
* Function reads an array of u8 properties with @propname from the device
* firmware description and stores them to @val if found.
*
- * Return: %0 if the property was found (success),
+ * Return: number of values if @val was %NULL,
+ * %0 if the property was found (success),
* %-EINVAL if given arguments are not valid,
* %-ENODATA if the property does not have a value,
* %-EPROTO if the property is not an array of numbers,
int device_property_read_u8_array(struct device *dev, const char *propname,
u8 *val, size_t nval)
{
- return DEV_PROP_READ_ARRAY(dev, propname, u8, DEV_PROP_U8, val, nval);
+ return fwnode_property_read_u8_array(dev_fwnode(dev), propname, val, nval);
}
EXPORT_SYMBOL_GPL(device_property_read_u8_array);
* device_property_read_u16_array - return a u16 array property of a device
* @dev: Device to get the property of
* @propname: Name of the property
- * @val: The values are stored here
+ * @val: The values are stored here or %NULL to return the number of values
* @nval: Size of the @val array
*
* Function reads an array of u16 properties with @propname from the device
* firmware description and stores them to @val if found.
*
- * Return: %0 if the property was found (success),
+ * Return: number of values if @val was %NULL,
+ * %0 if the property was found (success),
* %-EINVAL if given arguments are not valid,
* %-ENODATA if the property does not have a value,
* %-EPROTO if the property is not an array of numbers,
int device_property_read_u16_array(struct device *dev, const char *propname,
u16 *val, size_t nval)
{
- return DEV_PROP_READ_ARRAY(dev, propname, u16, DEV_PROP_U16, val, nval);
+ return fwnode_property_read_u16_array(dev_fwnode(dev), propname, val, nval);
}
EXPORT_SYMBOL_GPL(device_property_read_u16_array);
* device_property_read_u32_array - return a u32 array property of a device
* @dev: Device to get the property of
* @propname: Name of the property
- * @val: The values are stored here
+ * @val: The values are stored here or %NULL to return the number of values
* @nval: Size of the @val array
*
* Function reads an array of u32 properties with @propname from the device
* firmware description and stores them to @val if found.
*
- * Return: %0 if the property was found (success),
+ * Return: number of values if @val was %NULL,
+ * %0 if the property was found (success),
* %-EINVAL if given arguments are not valid,
* %-ENODATA if the property does not have a value,
* %-EPROTO if the property is not an array of numbers,
int device_property_read_u32_array(struct device *dev, const char *propname,
u32 *val, size_t nval)
{
- return DEV_PROP_READ_ARRAY(dev, propname, u32, DEV_PROP_U32, val, nval);
+ return fwnode_property_read_u32_array(dev_fwnode(dev), propname, val, nval);
}
EXPORT_SYMBOL_GPL(device_property_read_u32_array);
* device_property_read_u64_array - return a u64 array property of a device
* @dev: Device to get the property of
* @propname: Name of the property
- * @val: The values are stored here
+ * @val: The values are stored here or %NULL to return the number of values
* @nval: Size of the @val array
*
* Function reads an array of u64 properties with @propname from the device
* firmware description and stores them to @val if found.
*
- * Return: %0 if the property was found (success),
+ * Return: number of values if @val was %NULL,
+ * %0 if the property was found (success),
* %-EINVAL if given arguments are not valid,
* %-ENODATA if the property does not have a value,
* %-EPROTO if the property is not an array of numbers,
int device_property_read_u64_array(struct device *dev, const char *propname,
u64 *val, size_t nval)
{
- return DEV_PROP_READ_ARRAY(dev, propname, u64, DEV_PROP_U64, val, nval);
+ return fwnode_property_read_u64_array(dev_fwnode(dev), propname, val, nval);
}
EXPORT_SYMBOL_GPL(device_property_read_u64_array);
* device_property_read_string_array - return a string array property of device
* @dev: Device to get the property of
* @propname: Name of the property
- * @val: The values are stored here
+ * @val: The values are stored here or %NULL to return the number of values
* @nval: Size of the @val array
*
* Function reads an array of string properties with @propname from the device
* firmware description and stores them to @val if found.
*
- * Return: %0 if the property was found (success),
+ * Return: number of values if @val was %NULL,
+ * %0 if the property was found (success),
* %-EINVAL if given arguments are not valid,
* %-ENODATA if the property does not have a value,
* %-EPROTO or %-EILSEQ if the property is not an array of strings,
int device_property_read_string_array(struct device *dev, const char *propname,
const char **val, size_t nval)
{
- return IS_ENABLED(CONFIG_OF) && dev->of_node ?
- of_property_read_string_array(dev->of_node, propname, val, nval) :
- acpi_dev_prop_read(ACPI_COMPANION(dev), propname,
- DEV_PROP_STRING, val, nval);
+ return fwnode_property_read_string_array(dev_fwnode(dev), propname, val, nval);
}
EXPORT_SYMBOL_GPL(device_property_read_string_array);
int device_property_read_string(struct device *dev, const char *propname,
const char **val)
{
- return IS_ENABLED(CONFIG_OF) && dev->of_node ?
- of_property_read_string(dev->of_node, propname, val) :
- acpi_dev_prop_read(ACPI_COMPANION(dev), propname,
- DEV_PROP_STRING, val, 1);
+ return fwnode_property_read_string(dev_fwnode(dev), propname, val);
}
EXPORT_SYMBOL_GPL(device_property_read_string);
+#define OF_DEV_PROP_READ_ARRAY(node, propname, type, val, nval) \
+ (val) ? of_property_read_##type##_array((node), (propname), (val), (nval)) \
+ : of_property_count_elems_of_size((node), (propname), sizeof(type))
+
#define FWNODE_PROP_READ_ARRAY(_fwnode_, _propname_, _type_, _proptype_, _val_, _nval_) \
({ \
int _ret_; \
_ret_ = acpi_dev_prop_read(acpi_node(_fwnode_), _propname_, \
_proptype_, _val_, _nval_); \
else \
- _ret_ = -ENXIO; \
+ _ret_ = pset_prop_read_array(to_pset(_fwnode_), _propname_, \
+ _proptype_, _val_, _nval_); \
_ret_; \
})
* fwnode_property_read_u8_array - return a u8 array property of firmware node
* @fwnode: Firmware node to get the property of
* @propname: Name of the property
- * @val: The values are stored here
+ * @val: The values are stored here or %NULL to return the number of values
* @nval: Size of the @val array
*
* Read an array of u8 properties with @propname from @fwnode and stores them to
* @val if found.
*
- * Return: %0 if the property was found (success),
+ * Return: number of values if @val was %NULL,
+ * %0 if the property was found (success),
* %-EINVAL if given arguments are not valid,
* %-ENODATA if the property does not have a value,
* %-EPROTO if the property is not an array of numbers,
* fwnode_property_read_u16_array - return a u16 array property of firmware node
* @fwnode: Firmware node to get the property of
* @propname: Name of the property
- * @val: The values are stored here
+ * @val: The values are stored here or %NULL to return the number of values
* @nval: Size of the @val array
*
* Read an array of u16 properties with @propname from @fwnode and store them to
* @val if found.
*
- * Return: %0 if the property was found (success),
+ * Return: number of values if @val was %NULL,
+ * %0 if the property was found (success),
* %-EINVAL if given arguments are not valid,
* %-ENODATA if the property does not have a value,
* %-EPROTO if the property is not an array of numbers,
* fwnode_property_read_u32_array - return a u32 array property of firmware node
* @fwnode: Firmware node to get the property of
* @propname: Name of the property
- * @val: The values are stored here
+ * @val: The values are stored here or %NULL to return the number of values
* @nval: Size of the @val array
*
* Read an array of u32 properties with @propname from @fwnode store them to
* @val if found.
*
- * Return: %0 if the property was found (success),
+ * Return: number of values if @val was %NULL,
+ * %0 if the property was found (success),
* %-EINVAL if given arguments are not valid,
* %-ENODATA if the property does not have a value,
* %-EPROTO if the property is not an array of numbers,
* fwnode_property_read_u64_array - return a u64 array property firmware node
* @fwnode: Firmware node to get the property of
* @propname: Name of the property
- * @val: The values are stored here
+ * @val: The values are stored here or %NULL to return the number of values
* @nval: Size of the @val array
*
* Read an array of u64 properties with @propname from @fwnode and store them to
* @val if found.
*
- * Return: %0 if the property was found (success),
+ * Return: number of values if @val was %NULL,
+ * %0 if the property was found (success),
* %-EINVAL if given arguments are not valid,
* %-ENODATA if the property does not have a value,
* %-EPROTO if the property is not an array of numbers,
* fwnode_property_read_string_array - return string array property of a node
* @fwnode: Firmware node to get the property of
* @propname: Name of the property
- * @val: The values are stored here
+ * @val: The values are stored here or %NULL to return the number of values
* @nval: Size of the @val array
*
* Read an string list property @propname from the given firmware node and store
* them to @val if found.
*
- * Return: %0 if the property was found (success),
+ * Return: number of values if @val was %NULL,
+ * %0 if the property was found (success),
* %-EINVAL if given arguments are not valid,
* %-ENODATA if the property does not have a value,
* %-EPROTO if the property is not an array of strings,
size_t nval)
{
if (is_of_node(fwnode))
- return of_property_read_string_array(of_node(fwnode), propname,
- val, nval);
+ return val ?
+ of_property_read_string_array(of_node(fwnode), propname,
+ val, nval) :
+ of_property_count_strings(of_node(fwnode), propname);
else if (is_acpi_node(fwnode))
return acpi_dev_prop_read(acpi_node(fwnode), propname,
DEV_PROP_STRING, val, nval);
- return -ENXIO;
+ return pset_prop_read_array(to_pset(fwnode), propname,
+ DEV_PROP_STRING, val, nval);
}
EXPORT_SYMBOL_GPL(fwnode_property_read_string_array);
.remove = tpm_inf_pnp_remove
};
-static int __init init_inf(void)
-{
- return pnp_register_driver(&tpm_inf_pnp_driver);
-}
-
-static void __exit cleanup_inf(void)
-{
- pnp_unregister_driver(&tpm_inf_pnp_driver);
-}
-
-module_init(init_inf);
-module_exit(cleanup_inf);
+module_pnp_driver(tpm_inf_pnp_driver);
MODULE_AUTHOR("Marcel Selhorst <tpmdd@sirrix.com>");
MODULE_DESCRIPTION("Driver for Infineon TPM SLD 9630 TT 1.1 / SLB 9635 TT 1.2");
If unsure, say N.
endif
+config QORIQ_CPUFREQ
+ tristate "CPU frequency scaling driver for Freescale QorIQ SoCs"
+ depends on OF && COMMON_CLK && (PPC_E500MC || ARM)
+ select CLK_QORIQ
+ help
+ This adds the CPUFreq driver support for Freescale QorIQ SoCs
+ which are capable of changing the CPU's frequency dynamically.
+
endif
endmenu
If in doubt, say N.
+config ARM_HISI_ACPU_CPUFREQ
+ tristate "Hisilicon ACPU CPUfreq driver"
+ depends on ARCH_HISI && CPUFREQ_DT
+ select PM_OPP
+ help
+ This enables the hisilicon ACPU CPUfreq driver.
+
+ If in doubt, say N.
+
config ARM_IMX6Q_CPUFREQ
tristate "Freescale i.MX6 cpufreq support"
depends on ARCH_MXC
This adds support for frequency switching on Maple 970FX
Evaluation Board and compatible boards (IBM JS2x blades).
-config PPC_CORENET_CPUFREQ
- tristate "CPU frequency scaling driver for Freescale E500MC SoCs"
- depends on PPC_E500MC && OF && COMMON_CLK
- select CLK_QORIQ
- help
- This adds the CPUFreq driver support for Freescale e500mc,
- e5500 and e6500 series SoCs which are capable of changing
- the CPU's frequency dynamically.
-
config CPU_FREQ_PMAC
bool "Support for Apple PowerBooks"
depends on ADB_PMU && PPC32
arm-exynos-cpufreq-$(CONFIG_ARM_EXYNOS5250_CPUFREQ) += exynos5250-cpufreq.o
obj-$(CONFIG_ARM_EXYNOS5440_CPUFREQ) += exynos5440-cpufreq.o
obj-$(CONFIG_ARM_HIGHBANK_CPUFREQ) += highbank-cpufreq.o
+obj-$(CONFIG_ARM_HISI_ACPU_CPUFREQ) += hisi-acpu-cpufreq.o
obj-$(CONFIG_ARM_IMX6Q_CPUFREQ) += imx6q-cpufreq.o
obj-$(CONFIG_ARM_INTEGRATOR) += integrator-cpufreq.o
obj-$(CONFIG_ARM_KIRKWOOD_CPUFREQ) += kirkwood-cpufreq.o
ppc-cbe-cpufreq-y += ppc_cbe_cpufreq_pervasive.o ppc_cbe_cpufreq.o
obj-$(CONFIG_CPU_FREQ_CBE_PMI) += ppc_cbe_cpufreq_pmi.o
obj-$(CONFIG_CPU_FREQ_MAPLE) += maple-cpufreq.o
-obj-$(CONFIG_PPC_CORENET_CPUFREQ) += ppc-corenet-cpufreq.o
+obj-$(CONFIG_QORIQ_CPUFREQ) += qoriq-cpufreq.o
obj-$(CONFIG_CPU_FREQ_PMAC) += pmac32-cpufreq.o
obj-$(CONFIG_CPU_FREQ_PMAC64) += pmac64-cpufreq.o
obj-$(CONFIG_PPC_PASEMI_CPUFREQ) += pasemi-cpufreq.o
--- /dev/null
+/*
+ * Hisilicon Platforms Using ACPU CPUFreq Support
+ *
+ * Copyright (c) 2015 Hisilicon Limited.
+ * Copyright (c) 2015 Linaro Limited.
+ *
+ * Leo Yan <leo.yan@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+
+static int __init hisi_acpu_cpufreq_driver_init(void)
+{
+ struct platform_device *pdev;
+
+ if (!of_machine_is_compatible("hisilicon,hi6220"))
+ return -ENODEV;
+
+ pdev = platform_device_register_simple("cpufreq-dt", -1, NULL, 0);
+ return PTR_ERR_OR_ZERO(pdev);
+}
+module_init(hisi_acpu_cpufreq_driver_init);
+
+MODULE_AUTHOR("Leo Yan <leo.yan@linaro.org>");
+MODULE_DESCRIPTION("Hisilicon acpu cpufreq driver");
+MODULE_LICENSE("GPL v2");
wrmsrl_on_cpu(cpudata->cpu, MSR_IA32_PERF_CTL, val);
}
+static int knl_get_turbo_pstate(void)
+{
+ u64 value;
+ int nont, ret;
+
+ rdmsrl(MSR_NHM_TURBO_RATIO_LIMIT, value);
+ nont = core_get_max_pstate();
+ ret = (((value) >> 8) & 0xFF);
+ if (ret <= nont)
+ ret = nont;
+ return ret;
+}
+
static struct cpu_defaults core_params = {
.pid_policy = {
.sample_rate_ms = 10,
},
};
+static struct cpu_defaults knl_params = {
+ .pid_policy = {
+ .sample_rate_ms = 10,
+ .deadband = 0,
+ .setpoint = 97,
+ .p_gain_pct = 20,
+ .d_gain_pct = 0,
+ .i_gain_pct = 0,
+ },
+ .funcs = {
+ .get_max = core_get_max_pstate,
+ .get_min = core_get_min_pstate,
+ .get_turbo = knl_get_turbo_pstate,
+ .set = core_set_pstate,
+ },
+};
+
static void intel_pstate_get_min_max(struct cpudata *cpu, int *min, int *max)
{
int max_perf = cpu->pstate.turbo_pstate;
ICPU(0x4e, core_params),
ICPU(0x4f, core_params),
ICPU(0x56, core_params),
+ ICPU(0x57, knl_params),
{}
};
MODULE_DEVICE_TABLE(x86cpu, intel_pstate_cpu_ids);
static int intel_pstate_msrs_not_valid(void)
{
- /* Check that all the msr's we are using are valid. */
- u64 aperf, mperf, tmp;
-
- rdmsrl(MSR_IA32_APERF, aperf);
- rdmsrl(MSR_IA32_MPERF, mperf);
-
if (!pstate_funcs.get_max() ||
!pstate_funcs.get_min() ||
!pstate_funcs.get_turbo())
return -ENODEV;
- rdmsrl(MSR_IA32_APERF, tmp);
- if (!(tmp - aperf))
- return -ENODEV;
-
- rdmsrl(MSR_IA32_MPERF, tmp);
- if (!(tmp - mperf))
- return -ENODEV;
-
return 0;
}
#include <asm/smp.h> /* Required for cpu_sibling_mask() in UP configs */
#define POWERNV_MAX_PSTATES 256
+#define PMSR_PSAFE_ENABLE (1UL << 30)
+#define PMSR_SPR_EM_DISABLE (1UL << 31)
+#define PMSR_MAX(x) ((x >> 32) & 0xFF)
+#define PMSR_LP(x) ((x >> 48) & 0xFF)
static struct cpufreq_frequency_table powernv_freqs[POWERNV_MAX_PSTATES+1];
-static bool rebooting;
+static bool rebooting, throttled;
/*
* Note: The set of pstates consists of contiguous integers, the
return powernv_pstate_info.max - powernv_pstate_info.nominal;
}
+static void powernv_cpufreq_throttle_check(unsigned int cpu)
+{
+ unsigned long pmsr;
+ int pmsr_pmax, pmsr_lp;
+
+ pmsr = get_pmspr(SPRN_PMSR);
+
+ /* Check for Pmax Capping */
+ pmsr_pmax = (s8)PMSR_MAX(pmsr);
+ if (pmsr_pmax != powernv_pstate_info.max) {
+ throttled = true;
+ pr_info("CPU %d Pmax is reduced to %d\n", cpu, pmsr_pmax);
+ pr_info("Max allowed Pstate is capped\n");
+ }
+
+ /*
+ * Check for Psafe by reading LocalPstate
+ * or check if Psafe_mode_active is set in PMSR.
+ */
+ pmsr_lp = (s8)PMSR_LP(pmsr);
+ if ((pmsr_lp < powernv_pstate_info.min) ||
+ (pmsr & PMSR_PSAFE_ENABLE)) {
+ throttled = true;
+ pr_info("Pstate set to safe frequency\n");
+ }
+
+ /* Check if SPR_EM_DISABLE is set in PMSR */
+ if (pmsr & PMSR_SPR_EM_DISABLE) {
+ throttled = true;
+ pr_info("Frequency Control disabled from OS\n");
+ }
+
+ if (throttled) {
+ pr_info("PMSR = %16lx\n", pmsr);
+ pr_crit("CPU Frequency could be throttled\n");
+ }
+}
+
/*
* powernv_cpufreq_target_index: Sets the frequency corresponding to
* the cpufreq table entry indexed by new_index on the cpus in the
if (unlikely(rebooting) && new_index != get_nominal_index())
return 0;
+ if (!throttled)
+ powernv_cpufreq_throttle_check(smp_processor_id());
+
freq_data.pstate_id = powernv_freqs[new_index].driver_data;
/*
+++ /dev/null
-/*
- * Copyright 2013 Freescale Semiconductor, Inc.
- *
- * CPU Frequency Scaling driver for Freescale PowerPC corenet SoCs.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/clk.h>
-#include <linux/cpufreq.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/of.h>
-#include <linux/slab.h>
-#include <linux/smp.h>
-#include <sysdev/fsl_soc.h>
-
-#include <asm/smp.h> /* for get_hard_smp_processor_id() in UP configs */
-
-/**
- * struct cpu_data - per CPU data struct
- * @parent: the parent node of cpu clock
- * @table: frequency table
- */
-struct cpu_data {
- struct device_node *parent;
- struct cpufreq_frequency_table *table;
-};
-
-/**
- * struct soc_data - SoC specific data
- * @freq_mask: mask the disallowed frequencies
- * @flag: unique flags
- */
-struct soc_data {
- u32 freq_mask[4];
- u32 flag;
-};
-
-#define FREQ_MASK 1
-/* see hardware specification for the allowed frqeuencies */
-static const struct soc_data sdata[] = {
- { /* used by p2041 and p3041 */
- .freq_mask = {0x8, 0x8, 0x2, 0x2},
- .flag = FREQ_MASK,
- },
- { /* used by p5020 */
- .freq_mask = {0x8, 0x2},
- .flag = FREQ_MASK,
- },
- { /* used by p4080, p5040 */
- .freq_mask = {0},
- .flag = 0,
- },
-};
-
-/*
- * the minimum allowed core frequency, in Hz
- * for chassis v1.0, >= platform frequency
- * for chassis v2.0, >= platform frequency / 2
- */
-static u32 min_cpufreq;
-static const u32 *fmask;
-
-static DEFINE_PER_CPU(struct cpu_data *, cpu_data);
-
-/* cpumask in a cluster */
-static DEFINE_PER_CPU(cpumask_var_t, cpu_mask);
-
-#ifndef CONFIG_SMP
-static inline const struct cpumask *cpu_core_mask(int cpu)
-{
- return cpumask_of(0);
-}
-#endif
-
-/* reduce the duplicated frequencies in frequency table */
-static void freq_table_redup(struct cpufreq_frequency_table *freq_table,
- int count)
-{
- int i, j;
-
- for (i = 1; i < count; i++) {
- for (j = 0; j < i; j++) {
- if (freq_table[j].frequency == CPUFREQ_ENTRY_INVALID ||
- freq_table[j].frequency !=
- freq_table[i].frequency)
- continue;
-
- freq_table[i].frequency = CPUFREQ_ENTRY_INVALID;
- break;
- }
- }
-}
-
-/* sort the frequencies in frequency table in descenting order */
-static void freq_table_sort(struct cpufreq_frequency_table *freq_table,
- int count)
-{
- int i, j, ind;
- unsigned int freq, max_freq;
- struct cpufreq_frequency_table table;
- for (i = 0; i < count - 1; i++) {
- max_freq = freq_table[i].frequency;
- ind = i;
- for (j = i + 1; j < count; j++) {
- freq = freq_table[j].frequency;
- if (freq == CPUFREQ_ENTRY_INVALID ||
- freq <= max_freq)
- continue;
- ind = j;
- max_freq = freq;
- }
-
- if (ind != i) {
- /* exchange the frequencies */
- table.driver_data = freq_table[i].driver_data;
- table.frequency = freq_table[i].frequency;
- freq_table[i].driver_data = freq_table[ind].driver_data;
- freq_table[i].frequency = freq_table[ind].frequency;
- freq_table[ind].driver_data = table.driver_data;
- freq_table[ind].frequency = table.frequency;
- }
- }
-}
-
-static int corenet_cpufreq_cpu_init(struct cpufreq_policy *policy)
-{
- struct device_node *np;
- int i, count, ret;
- u32 freq, mask;
- struct clk *clk;
- struct cpufreq_frequency_table *table;
- struct cpu_data *data;
- unsigned int cpu = policy->cpu;
- u64 u64temp;
-
- np = of_get_cpu_node(cpu, NULL);
- if (!np)
- return -ENODEV;
-
- data = kzalloc(sizeof(*data), GFP_KERNEL);
- if (!data) {
- pr_err("%s: no memory\n", __func__);
- goto err_np;
- }
-
- policy->clk = of_clk_get(np, 0);
- if (IS_ERR(policy->clk)) {
- pr_err("%s: no clock information\n", __func__);
- goto err_nomem2;
- }
-
- data->parent = of_parse_phandle(np, "clocks", 0);
- if (!data->parent) {
- pr_err("%s: could not get clock information\n", __func__);
- goto err_nomem2;
- }
-
- count = of_property_count_strings(data->parent, "clock-names");
- table = kcalloc(count + 1, sizeof(*table), GFP_KERNEL);
- if (!table) {
- pr_err("%s: no memory\n", __func__);
- goto err_node;
- }
-
- if (fmask)
- mask = fmask[get_hard_smp_processor_id(cpu)];
- else
- mask = 0x0;
-
- for (i = 0; i < count; i++) {
- clk = of_clk_get(data->parent, i);
- freq = clk_get_rate(clk);
- /*
- * the clock is valid if its frequency is not masked
- * and large than minimum allowed frequency.
- */
- if (freq < min_cpufreq || (mask & (1 << i)))
- table[i].frequency = CPUFREQ_ENTRY_INVALID;
- else
- table[i].frequency = freq / 1000;
- table[i].driver_data = i;
- }
- freq_table_redup(table, count);
- freq_table_sort(table, count);
- table[i].frequency = CPUFREQ_TABLE_END;
-
- /* set the min and max frequency properly */
- ret = cpufreq_table_validate_and_show(policy, table);
- if (ret) {
- pr_err("invalid frequency table: %d\n", ret);
- goto err_nomem1;
- }
-
- data->table = table;
-
- /* update ->cpus if we have cluster, no harm if not */
- cpumask_copy(policy->cpus, per_cpu(cpu_mask, cpu));
- for_each_cpu(i, per_cpu(cpu_mask, cpu))
- per_cpu(cpu_data, i) = data;
-
- /* Minimum transition latency is 12 platform clocks */
- u64temp = 12ULL * NSEC_PER_SEC;
- do_div(u64temp, fsl_get_sys_freq());
- policy->cpuinfo.transition_latency = u64temp + 1;
-
- of_node_put(np);
-
- return 0;
-
-err_nomem1:
- kfree(table);
-err_node:
- of_node_put(data->parent);
-err_nomem2:
- per_cpu(cpu_data, cpu) = NULL;
- kfree(data);
-err_np:
- of_node_put(np);
-
- return -ENODEV;
-}
-
-static int __exit corenet_cpufreq_cpu_exit(struct cpufreq_policy *policy)
-{
- struct cpu_data *data = per_cpu(cpu_data, policy->cpu);
- unsigned int cpu;
-
- of_node_put(data->parent);
- kfree(data->table);
- kfree(data);
-
- for_each_cpu(cpu, per_cpu(cpu_mask, policy->cpu))
- per_cpu(cpu_data, cpu) = NULL;
-
- return 0;
-}
-
-static int corenet_cpufreq_target(struct cpufreq_policy *policy,
- unsigned int index)
-{
- struct clk *parent;
- struct cpu_data *data = per_cpu(cpu_data, policy->cpu);
-
- parent = of_clk_get(data->parent, data->table[index].driver_data);
- return clk_set_parent(policy->clk, parent);
-}
-
-static struct cpufreq_driver ppc_corenet_cpufreq_driver = {
- .name = "ppc_cpufreq",
- .flags = CPUFREQ_CONST_LOOPS,
- .init = corenet_cpufreq_cpu_init,
- .exit = __exit_p(corenet_cpufreq_cpu_exit),
- .verify = cpufreq_generic_frequency_table_verify,
- .target_index = corenet_cpufreq_target,
- .get = cpufreq_generic_get,
- .attr = cpufreq_generic_attr,
-};
-
-static const struct of_device_id node_matches[] __initdata = {
- { .compatible = "fsl,p2041-clockgen", .data = &sdata[0], },
- { .compatible = "fsl,p3041-clockgen", .data = &sdata[0], },
- { .compatible = "fsl,p5020-clockgen", .data = &sdata[1], },
- { .compatible = "fsl,p4080-clockgen", .data = &sdata[2], },
- { .compatible = "fsl,p5040-clockgen", .data = &sdata[2], },
- { .compatible = "fsl,qoriq-clockgen-2.0", },
- {}
-};
-
-static int __init ppc_corenet_cpufreq_init(void)
-{
- int ret;
- struct device_node *np;
- const struct of_device_id *match;
- const struct soc_data *data;
- unsigned int cpu;
-
- np = of_find_matching_node(NULL, node_matches);
- if (!np)
- return -ENODEV;
-
- for_each_possible_cpu(cpu) {
- if (!alloc_cpumask_var(&per_cpu(cpu_mask, cpu), GFP_KERNEL))
- goto err_mask;
- cpumask_copy(per_cpu(cpu_mask, cpu), cpu_core_mask(cpu));
- }
-
- match = of_match_node(node_matches, np);
- data = match->data;
- if (data) {
- if (data->flag)
- fmask = data->freq_mask;
- min_cpufreq = fsl_get_sys_freq();
- } else {
- min_cpufreq = fsl_get_sys_freq() / 2;
- }
-
- of_node_put(np);
-
- ret = cpufreq_register_driver(&ppc_corenet_cpufreq_driver);
- if (!ret)
- pr_info("Freescale PowerPC corenet CPU frequency scaling driver\n");
-
- return ret;
-
-err_mask:
- for_each_possible_cpu(cpu)
- free_cpumask_var(per_cpu(cpu_mask, cpu));
-
- return -ENOMEM;
-}
-module_init(ppc_corenet_cpufreq_init);
-
-static void __exit ppc_corenet_cpufreq_exit(void)
-{
- unsigned int cpu;
-
- for_each_possible_cpu(cpu)
- free_cpumask_var(per_cpu(cpu_mask, cpu));
-
- cpufreq_unregister_driver(&ppc_corenet_cpufreq_driver);
-}
-module_exit(ppc_corenet_cpufreq_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Tang Yuantian <Yuantian.Tang@freescale.com>");
-MODULE_DESCRIPTION("cpufreq driver for Freescale e500mc series SoCs");
--- /dev/null
+/*
+ * Copyright 2013 Freescale Semiconductor, Inc.
+ *
+ * CPU Frequency Scaling driver for Freescale QorIQ SoCs.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/clk.h>
+#include <linux/cpufreq.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+#include <linux/smp.h>
+
+#if !defined(CONFIG_ARM)
+#include <asm/smp.h> /* for get_hard_smp_processor_id() in UP configs */
+#endif
+
+/**
+ * struct cpu_data
+ * @parent: the parent node of cpu clock
+ * @table: frequency table
+ */
+struct cpu_data {
+ struct device_node *parent;
+ struct cpufreq_frequency_table *table;
+};
+
+/**
+ * struct soc_data - SoC specific data
+ * @freq_mask: mask the disallowed frequencies
+ * @flag: unique flags
+ */
+struct soc_data {
+ u32 freq_mask[4];
+ u32 flag;
+};
+
+#define FREQ_MASK 1
+/* see hardware specification for the allowed frqeuencies */
+static const struct soc_data sdata[] = {
+ { /* used by p2041 and p3041 */
+ .freq_mask = {0x8, 0x8, 0x2, 0x2},
+ .flag = FREQ_MASK,
+ },
+ { /* used by p5020 */
+ .freq_mask = {0x8, 0x2},
+ .flag = FREQ_MASK,
+ },
+ { /* used by p4080, p5040 */
+ .freq_mask = {0},
+ .flag = 0,
+ },
+};
+
+/*
+ * the minimum allowed core frequency, in Hz
+ * for chassis v1.0, >= platform frequency
+ * for chassis v2.0, >= platform frequency / 2
+ */
+static u32 min_cpufreq;
+static const u32 *fmask;
+
+#if defined(CONFIG_ARM)
+static int get_cpu_physical_id(int cpu)
+{
+ return topology_core_id(cpu);
+}
+#else
+static int get_cpu_physical_id(int cpu)
+{
+ return get_hard_smp_processor_id(cpu);
+}
+#endif
+
+static u32 get_bus_freq(void)
+{
+ struct device_node *soc;
+ u32 sysfreq;
+
+ soc = of_find_node_by_type(NULL, "soc");
+ if (!soc)
+ return 0;
+
+ if (of_property_read_u32(soc, "bus-frequency", &sysfreq))
+ sysfreq = 0;
+
+ of_node_put(soc);
+
+ return sysfreq;
+}
+
+static struct device_node *cpu_to_clk_node(int cpu)
+{
+ struct device_node *np, *clk_np;
+
+ if (!cpu_present(cpu))
+ return NULL;
+
+ np = of_get_cpu_node(cpu, NULL);
+ if (!np)
+ return NULL;
+
+ clk_np = of_parse_phandle(np, "clocks", 0);
+ if (!clk_np)
+ return NULL;
+
+ of_node_put(np);
+
+ return clk_np;
+}
+
+/* traverse cpu nodes to get cpu mask of sharing clock wire */
+static void set_affected_cpus(struct cpufreq_policy *policy)
+{
+ struct device_node *np, *clk_np;
+ struct cpumask *dstp = policy->cpus;
+ int i;
+
+ np = cpu_to_clk_node(policy->cpu);
+ if (!np)
+ return;
+
+ for_each_present_cpu(i) {
+ clk_np = cpu_to_clk_node(i);
+ if (!clk_np)
+ continue;
+
+ if (clk_np == np)
+ cpumask_set_cpu(i, dstp);
+
+ of_node_put(clk_np);
+ }
+ of_node_put(np);
+}
+
+/* reduce the duplicated frequencies in frequency table */
+static void freq_table_redup(struct cpufreq_frequency_table *freq_table,
+ int count)
+{
+ int i, j;
+
+ for (i = 1; i < count; i++) {
+ for (j = 0; j < i; j++) {
+ if (freq_table[j].frequency == CPUFREQ_ENTRY_INVALID ||
+ freq_table[j].frequency !=
+ freq_table[i].frequency)
+ continue;
+
+ freq_table[i].frequency = CPUFREQ_ENTRY_INVALID;
+ break;
+ }
+ }
+}
+
+/* sort the frequencies in frequency table in descenting order */
+static void freq_table_sort(struct cpufreq_frequency_table *freq_table,
+ int count)
+{
+ int i, j, ind;
+ unsigned int freq, max_freq;
+ struct cpufreq_frequency_table table;
+
+ for (i = 0; i < count - 1; i++) {
+ max_freq = freq_table[i].frequency;
+ ind = i;
+ for (j = i + 1; j < count; j++) {
+ freq = freq_table[j].frequency;
+ if (freq == CPUFREQ_ENTRY_INVALID ||
+ freq <= max_freq)
+ continue;
+ ind = j;
+ max_freq = freq;
+ }
+
+ if (ind != i) {
+ /* exchange the frequencies */
+ table.driver_data = freq_table[i].driver_data;
+ table.frequency = freq_table[i].frequency;
+ freq_table[i].driver_data = freq_table[ind].driver_data;
+ freq_table[i].frequency = freq_table[ind].frequency;
+ freq_table[ind].driver_data = table.driver_data;
+ freq_table[ind].frequency = table.frequency;
+ }
+ }
+}
+
+static int qoriq_cpufreq_cpu_init(struct cpufreq_policy *policy)
+{
+ struct device_node *np;
+ int i, count, ret;
+ u32 freq, mask;
+ struct clk *clk;
+ struct cpufreq_frequency_table *table;
+ struct cpu_data *data;
+ unsigned int cpu = policy->cpu;
+ u64 u64temp;
+
+ np = of_get_cpu_node(cpu, NULL);
+ if (!np)
+ return -ENODEV;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ goto err_np;
+
+ policy->clk = of_clk_get(np, 0);
+ if (IS_ERR(policy->clk)) {
+ pr_err("%s: no clock information\n", __func__);
+ goto err_nomem2;
+ }
+
+ data->parent = of_parse_phandle(np, "clocks", 0);
+ if (!data->parent) {
+ pr_err("%s: could not get clock information\n", __func__);
+ goto err_nomem2;
+ }
+
+ count = of_property_count_strings(data->parent, "clock-names");
+ table = kcalloc(count + 1, sizeof(*table), GFP_KERNEL);
+ if (!table) {
+ pr_err("%s: no memory\n", __func__);
+ goto err_node;
+ }
+
+ if (fmask)
+ mask = fmask[get_cpu_physical_id(cpu)];
+ else
+ mask = 0x0;
+
+ for (i = 0; i < count; i++) {
+ clk = of_clk_get(data->parent, i);
+ freq = clk_get_rate(clk);
+ /*
+ * the clock is valid if its frequency is not masked
+ * and large than minimum allowed frequency.
+ */
+ if (freq < min_cpufreq || (mask & (1 << i)))
+ table[i].frequency = CPUFREQ_ENTRY_INVALID;
+ else
+ table[i].frequency = freq / 1000;
+ table[i].driver_data = i;
+ }
+ freq_table_redup(table, count);
+ freq_table_sort(table, count);
+ table[i].frequency = CPUFREQ_TABLE_END;
+
+ /* set the min and max frequency properly */
+ ret = cpufreq_table_validate_and_show(policy, table);
+ if (ret) {
+ pr_err("invalid frequency table: %d\n", ret);
+ goto err_nomem1;
+ }
+
+ data->table = table;
+
+ /* update ->cpus if we have cluster, no harm if not */
+ set_affected_cpus(policy);
+ policy->driver_data = data;
+
+ /* Minimum transition latency is 12 platform clocks */
+ u64temp = 12ULL * NSEC_PER_SEC;
+ do_div(u64temp, get_bus_freq());
+ policy->cpuinfo.transition_latency = u64temp + 1;
+
+ of_node_put(np);
+
+ return 0;
+
+err_nomem1:
+ kfree(table);
+err_node:
+ of_node_put(data->parent);
+err_nomem2:
+ policy->driver_data = NULL;
+ kfree(data);
+err_np:
+ of_node_put(np);
+
+ return -ENODEV;
+}
+
+static int __exit qoriq_cpufreq_cpu_exit(struct cpufreq_policy *policy)
+{
+ struct cpu_data *data = policy->driver_data;
+
+ of_node_put(data->parent);
+ kfree(data->table);
+ kfree(data);
+ policy->driver_data = NULL;
+
+ return 0;
+}
+
+static int qoriq_cpufreq_target(struct cpufreq_policy *policy,
+ unsigned int index)
+{
+ struct clk *parent;
+ struct cpu_data *data = policy->driver_data;
+
+ parent = of_clk_get(data->parent, data->table[index].driver_data);
+ return clk_set_parent(policy->clk, parent);
+}
+
+static struct cpufreq_driver qoriq_cpufreq_driver = {
+ .name = "qoriq_cpufreq",
+ .flags = CPUFREQ_CONST_LOOPS,
+ .init = qoriq_cpufreq_cpu_init,
+ .exit = __exit_p(qoriq_cpufreq_cpu_exit),
+ .verify = cpufreq_generic_frequency_table_verify,
+ .target_index = qoriq_cpufreq_target,
+ .get = cpufreq_generic_get,
+ .attr = cpufreq_generic_attr,
+};
+
+static const struct of_device_id node_matches[] __initconst = {
+ { .compatible = "fsl,p2041-clockgen", .data = &sdata[0], },
+ { .compatible = "fsl,p3041-clockgen", .data = &sdata[0], },
+ { .compatible = "fsl,p5020-clockgen", .data = &sdata[1], },
+ { .compatible = "fsl,p4080-clockgen", .data = &sdata[2], },
+ { .compatible = "fsl,p5040-clockgen", .data = &sdata[2], },
+ { .compatible = "fsl,qoriq-clockgen-2.0", },
+ {}
+};
+
+static int __init qoriq_cpufreq_init(void)
+{
+ int ret;
+ struct device_node *np;
+ const struct of_device_id *match;
+ const struct soc_data *data;
+
+ np = of_find_matching_node(NULL, node_matches);
+ if (!np)
+ return -ENODEV;
+
+ match = of_match_node(node_matches, np);
+ data = match->data;
+ if (data) {
+ if (data->flag)
+ fmask = data->freq_mask;
+ min_cpufreq = get_bus_freq();
+ } else {
+ min_cpufreq = get_bus_freq() / 2;
+ }
+
+ of_node_put(np);
+
+ ret = cpufreq_register_driver(&qoriq_cpufreq_driver);
+ if (!ret)
+ pr_info("Freescale QorIQ CPU frequency scaling driver\n");
+
+ return ret;
+}
+module_init(qoriq_cpufreq_init);
+
+static void __exit qoriq_cpufreq_exit(void)
+{
+ cpufreq_unregister_driver(&qoriq_cpufreq_driver);
+}
+module_exit(qoriq_cpufreq_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Tang Yuantian <Yuantian.Tang@freescale.com>");
+MODULE_DESCRIPTION("cpufreq driver for Freescale QorIQ series SoCs");
bool
menu "ARM CPU Idle Drivers"
-depends on ARM
+depends on ARM || ARM64
source "drivers/cpuidle/Kconfig.arm"
endmenu
-menu "ARM64 CPU Idle Drivers"
-depends on ARM64
-source "drivers/cpuidle/Kconfig.arm64"
-endmenu
-
menu "MIPS CPU Idle Drivers"
depends on MIPS
source "drivers/cpuidle/Kconfig.mips"
#
# ARM CPU Idle drivers
#
+config ARM_CPUIDLE
+ bool "Generic ARM/ARM64 CPU idle Driver"
+ select DT_IDLE_STATES
+ help
+ Select this to enable generic cpuidle driver for ARM.
+ It provides a generic idle driver whose idle states are configured
+ at run-time through DT nodes. The CPUidle suspend backend is
+ initialized by calling the CPU operations init idle hook
+ provided by architecture code.
+
config ARM_BIG_LITTLE_CPUIDLE
bool "Support for ARM big.LITTLE processors"
depends on ARCH_VEXPRESS_TC2_PM || ARCH_EXYNOS
- depends on MCPM
+ depends on MCPM && !ARM64
select ARM_CPU_SUSPEND
select CPU_IDLE_MULTIPLE_DRIVERS
select DT_IDLE_STATES
config ARM_CLPS711X_CPUIDLE
bool "CPU Idle Driver for CLPS711X processors"
- depends on ARCH_CLPS711X || COMPILE_TEST
+ depends on ARCH_CLPS711X && !ARM64 || COMPILE_TEST
help
Select this to enable cpuidle on Cirrus Logic CLPS711X SOCs.
config ARM_HIGHBANK_CPUIDLE
bool "CPU Idle Driver for Calxeda processors"
- depends on ARM_PSCI
+ depends on ARM_PSCI && !ARM64
select ARM_CPU_SUSPEND
help
Select this to enable cpuidle on Calxeda processors.
config ARM_KIRKWOOD_CPUIDLE
bool "CPU Idle Driver for Marvell Kirkwood SoCs"
- depends on MACH_KIRKWOOD
+ depends on MACH_KIRKWOOD && !ARM64
help
This adds the CPU Idle driver for Marvell Kirkwood SoCs.
config ARM_ZYNQ_CPUIDLE
bool "CPU Idle Driver for Xilinx Zynq processors"
- depends on ARCH_ZYNQ
+ depends on ARCH_ZYNQ && !ARM64
help
Select this to enable cpuidle on Xilinx Zynq processors.
config ARM_U8500_CPUIDLE
bool "Cpu Idle Driver for the ST-E u8500 processors"
- depends on ARCH_U8500
+ depends on ARCH_U8500 && !ARM64
help
Select this to enable cpuidle for ST-E u8500 processors
config ARM_AT91_CPUIDLE
bool "Cpu Idle Driver for the AT91 processors"
default y
- depends on ARCH_AT91
+ depends on ARCH_AT91 && !ARM64
help
Select this to enable cpuidle for AT91 processors
config ARM_EXYNOS_CPUIDLE
bool "Cpu Idle Driver for the Exynos processors"
- depends on ARCH_EXYNOS
+ depends on ARCH_EXYNOS && !ARM64
select ARCH_NEEDS_CPU_IDLE_COUPLED if SMP
help
Select this to enable cpuidle for Exynos processors
config ARM_MVEBU_V7_CPUIDLE
bool "CPU Idle Driver for mvebu v7 family processors"
- depends on ARCH_MVEBU
+ depends on ARCH_MVEBU && !ARM64
help
Select this to enable cpuidle on Armada 370, 38x and XP processors.
+++ /dev/null
-#
-# ARM64 CPU Idle drivers
-#
-
-config ARM64_CPUIDLE
- bool "Generic ARM64 CPU idle Driver"
- select DT_IDLE_STATES
- help
- Select this to enable generic cpuidle driver for ARM64.
- It provides a generic idle driver whose idle states are configured
- at run-time through DT nodes. The CPUidle suspend backend is
- initialized by calling the CPU operations init idle hook
- provided by architecture code.
obj-$(CONFIG_ARM_U8500_CPUIDLE) += cpuidle-ux500.o
obj-$(CONFIG_ARM_AT91_CPUIDLE) += cpuidle-at91.o
obj-$(CONFIG_ARM_EXYNOS_CPUIDLE) += cpuidle-exynos.o
+obj-$(CONFIG_ARM_CPUIDLE) += cpuidle-arm.o
###############################################################################
# MIPS drivers
obj-$(CONFIG_MIPS_CPS_CPUIDLE) += cpuidle-cps.o
-###############################################################################
-# ARM64 drivers
-obj-$(CONFIG_ARM64_CPUIDLE) += cpuidle-arm64.o
-
###############################################################################
# POWERPC drivers
obj-$(CONFIG_PSERIES_CPUIDLE) += cpuidle-pseries.o
--- /dev/null
+/*
+ * ARM/ARM64 generic CPU idle driver.
+ *
+ * Copyright (C) 2014 ARM Ltd.
+ * Author: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#define pr_fmt(fmt) "CPUidle arm: " fmt
+
+#include <linux/cpuidle.h>
+#include <linux/cpumask.h>
+#include <linux/cpu_pm.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+
+#include <asm/cpuidle.h>
+
+#include "dt_idle_states.h"
+
+/*
+ * arm_enter_idle_state - Programs CPU to enter the specified state
+ *
+ * dev: cpuidle device
+ * drv: cpuidle driver
+ * idx: state index
+ *
+ * Called from the CPUidle framework to program the device to the
+ * specified target state selected by the governor.
+ */
+static int arm_enter_idle_state(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv, int idx)
+{
+ int ret;
+
+ if (!idx) {
+ cpu_do_idle();
+ return idx;
+ }
+
+ ret = cpu_pm_enter();
+ if (!ret) {
+ /*
+ * Pass idle state index to cpu_suspend which in turn will
+ * call the CPU ops suspend protocol with idle index as a
+ * parameter.
+ */
+ arm_cpuidle_suspend(idx);
+
+ cpu_pm_exit();
+ }
+
+ return ret ? -1 : idx;
+}
+
+static struct cpuidle_driver arm_idle_driver = {
+ .name = "arm_idle",
+ .owner = THIS_MODULE,
+ /*
+ * State at index 0 is standby wfi and considered standard
+ * on all ARM platforms. If in some platforms simple wfi
+ * can't be used as "state 0", DT bindings must be implemented
+ * to work around this issue and allow installing a special
+ * handler for idle state index 0.
+ */
+ .states[0] = {
+ .enter = arm_enter_idle_state,
+ .exit_latency = 1,
+ .target_residency = 1,
+ .power_usage = UINT_MAX,
+ .name = "WFI",
+ .desc = "ARM WFI",
+ }
+};
+
+static const struct of_device_id arm_idle_state_match[] __initconst = {
+ { .compatible = "arm,idle-state",
+ .data = arm_enter_idle_state },
+ { },
+};
+
+/*
+ * arm_idle_init
+ *
+ * Registers the arm specific cpuidle driver with the cpuidle
+ * framework. It relies on core code to parse the idle states
+ * and initialize them using driver data structures accordingly.
+ */
+static int __init arm_idle_init(void)
+{
+ int cpu, ret;
+ struct cpuidle_driver *drv = &arm_idle_driver;
+ struct cpuidle_device *dev;
+
+ /*
+ * Initialize idle states data, starting at index 1.
+ * This driver is DT only, if no DT idle states are detected (ret == 0)
+ * let the driver initialization fail accordingly since there is no
+ * reason to initialize the idle driver if only wfi is supported.
+ */
+ ret = dt_init_idle_driver(drv, arm_idle_state_match, 1);
+ if (ret <= 0)
+ return ret ? : -ENODEV;
+
+ ret = cpuidle_register_driver(drv);
+ if (ret) {
+ pr_err("Failed to register cpuidle driver\n");
+ return ret;
+ }
+
+ /*
+ * Call arch CPU operations in order to initialize
+ * idle states suspend back-end specific data
+ */
+ for_each_possible_cpu(cpu) {
+ ret = arm_cpuidle_init(cpu);
+
+ /*
+ * Skip the cpuidle device initialization if the reported
+ * failure is a HW misconfiguration/breakage (-ENXIO).
+ */
+ if (ret == -ENXIO)
+ continue;
+
+ if (ret) {
+ pr_err("CPU %d failed to init idle CPU ops\n", cpu);
+ goto out_fail;
+ }
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev) {
+ pr_err("Failed to allocate cpuidle device\n");
+ goto out_fail;
+ }
+ dev->cpu = cpu;
+
+ ret = cpuidle_register_device(dev);
+ if (ret) {
+ pr_err("Failed to register cpuidle device for CPU %d\n",
+ cpu);
+ kfree(dev);
+ goto out_fail;
+ }
+ }
+
+ return 0;
+out_fail:
+ while (--cpu >= 0) {
+ dev = per_cpu(cpuidle_devices, cpu);
+ cpuidle_unregister_device(dev);
+ kfree(dev);
+ }
+
+ cpuidle_unregister_driver(drv);
+
+ return ret;
+}
+device_initcall(arm_idle_init);
+++ /dev/null
-/*
- * ARM64 generic CPU idle driver.
- *
- * Copyright (C) 2014 ARM Ltd.
- * Author: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#define pr_fmt(fmt) "CPUidle arm64: " fmt
-
-#include <linux/cpuidle.h>
-#include <linux/cpumask.h>
-#include <linux/cpu_pm.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/of.h>
-
-#include <asm/cpuidle.h>
-
-#include "dt_idle_states.h"
-
-/*
- * arm64_enter_idle_state - Programs CPU to enter the specified state
- *
- * dev: cpuidle device
- * drv: cpuidle driver
- * idx: state index
- *
- * Called from the CPUidle framework to program the device to the
- * specified target state selected by the governor.
- */
-static int arm64_enter_idle_state(struct cpuidle_device *dev,
- struct cpuidle_driver *drv, int idx)
-{
- int ret;
-
- if (!idx) {
- cpu_do_idle();
- return idx;
- }
-
- ret = cpu_pm_enter();
- if (!ret) {
- /*
- * Pass idle state index to cpu_suspend which in turn will
- * call the CPU ops suspend protocol with idle index as a
- * parameter.
- */
- ret = cpu_suspend(idx);
-
- cpu_pm_exit();
- }
-
- return ret ? -1 : idx;
-}
-
-static struct cpuidle_driver arm64_idle_driver = {
- .name = "arm64_idle",
- .owner = THIS_MODULE,
- /*
- * State at index 0 is standby wfi and considered standard
- * on all ARM platforms. If in some platforms simple wfi
- * can't be used as "state 0", DT bindings must be implemented
- * to work around this issue and allow installing a special
- * handler for idle state index 0.
- */
- .states[0] = {
- .enter = arm64_enter_idle_state,
- .exit_latency = 1,
- .target_residency = 1,
- .power_usage = UINT_MAX,
- .name = "WFI",
- .desc = "ARM64 WFI",
- }
-};
-
-static const struct of_device_id arm64_idle_state_match[] __initconst = {
- { .compatible = "arm,idle-state",
- .data = arm64_enter_idle_state },
- { },
-};
-
-/*
- * arm64_idle_init
- *
- * Registers the arm64 specific cpuidle driver with the cpuidle
- * framework. It relies on core code to parse the idle states
- * and initialize them using driver data structures accordingly.
- */
-static int __init arm64_idle_init(void)
-{
- int cpu, ret;
- struct cpuidle_driver *drv = &arm64_idle_driver;
-
- /*
- * Initialize idle states data, starting at index 1.
- * This driver is DT only, if no DT idle states are detected (ret == 0)
- * let the driver initialization fail accordingly since there is no
- * reason to initialize the idle driver if only wfi is supported.
- */
- ret = dt_init_idle_driver(drv, arm64_idle_state_match, 1);
- if (ret <= 0)
- return ret ? : -ENODEV;
-
- /*
- * Call arch CPU operations in order to initialize
- * idle states suspend back-end specific data
- */
- for_each_possible_cpu(cpu) {
- ret = cpu_init_idle(cpu);
- if (ret) {
- pr_err("CPU %d failed to init idle CPU ops\n", cpu);
- return ret;
- }
- }
-
- return cpuidle_register(drv, NULL);
-}
-device_initcall(arm64_idle_init);
#include <linux/cpuidle.h>
#include <linux/io.h>
#include <linux/export.h>
-#include <asm/proc-fns.h>
#include <asm/cpuidle.h>
#define AT91_MAX_STATES 2
#include <linux/of.h>
#include <linux/platform_data/cpuidle-exynos.h>
-#include <asm/proc-fns.h>
#include <asm/suspend.h>
#include <asm/cpuidle.h>
#include <linux/cpuidle.h>
#include <linux/io.h>
#include <linux/export.h>
-#include <asm/proc-fns.h>
#include <asm/cpuidle.h>
#define KIRKWOOD_MAX_STATES 2
#include <linux/platform_device.h>
#include <asm/cpuidle.h>
-#include <asm/proc-fns.h>
static atomic_t master = ATOMIC_INIT(0);
static DEFINE_SPINLOCK(master_lock);
#include <linux/init.h>
#include <linux/cpuidle.h>
#include <linux/platform_device.h>
-#include <asm/proc-fns.h>
#include <asm/cpuidle.h>
#define ZYNQ_MAX_STATES 2
/**
* _remove_devfreq() - Remove devfreq from the list and release its resources.
* @devfreq: the devfreq struct
- * @skip: skip calling device_unregister().
*/
static void _remove_devfreq(struct devfreq *devfreq)
{
return 0;
}
-static struct devfreq_event_ops exynos_ppmu_ops = {
+static const struct devfreq_event_ops exynos_ppmu_ops = {
.disable = exynos_ppmu_disable,
.set_event = exynos_ppmu_set_event,
.get_event = exynos_ppmu_get_event,
#define ACTMON_BELOW_WMARK_WINDOW 3
#define ACTMON_BOOST_FREQ_STEP 16000
-/* activity counter is incremented every 256 memory transactions, and each
+/*
+ * Activity counter is incremented every 256 memory transactions, and each
* transaction takes 4 EMC clocks for Tegra124; So the COUNT_WEIGHT is
* 4 * 256 = 1024.
*/
* struct tegra_devfreq_device_config - configuration specific to an ACTMON
* device
*
- * Coefficients and thresholds are in %
+ * Coefficients and thresholds are percentages unless otherwise noted
*/
struct tegra_devfreq_device_config {
u32 offset;
u32 irq_mask;
+ /* Factors applied to boost_freq every consecutive watermark breach */
unsigned int boost_up_coeff;
unsigned int boost_down_coeff;
+
+ /* Define the watermark bounds when applied to the current avg */
unsigned int boost_up_threshold;
unsigned int boost_down_threshold;
+
+ /*
+ * Threshold of activity (cycles) below which the CPU frequency isn't
+ * to be taken into account. This is to avoid increasing the EMC
+ * frequency when the CPU is very busy but not accessing the bus often.
+ */
u32 avg_dependency_threshold;
};
static struct tegra_devfreq_device_config actmon_device_configs[] = {
{
- /* MCALL */
+ /* MCALL: All memory accesses (including from the CPUs) */
.offset = 0x1c0,
.irq_mask = 1 << 26,
.boost_up_coeff = 200,
.boost_down_threshold = 40,
},
{
- /* MCCPU */
+ /* MCCPU: memory accesses from the CPUs */
.offset = 0x200,
.irq_mask = 1 << 25,
.boost_up_coeff = 800,
*/
struct tegra_devfreq_device {
const struct tegra_devfreq_device_config *config;
+ void __iomem *regs;
+ spinlock_t lock;
+
+ /* Average event count sampled in the last interrupt */
+ u32 avg_count;
- void __iomem *regs;
- u32 avg_band_freq;
- u32 avg_count;
+ /*
+ * Extra frequency to increase the target by due to consecutive
+ * watermark breaches.
+ */
+ unsigned long boost_freq;
- unsigned long target_freq;
- unsigned long boost_freq;
+ /* Optimal frequency calculated from the stats for this device */
+ unsigned long target_freq;
};
struct tegra_devfreq {
struct devfreq *devfreq;
- struct platform_device *pdev;
struct reset_control *reset;
struct clk *clock;
void __iomem *regs;
- spinlock_t lock;
-
struct clk *emc_clock;
unsigned long max_freq;
unsigned long cur_freq;
{ 250000, 100000 },
};
+static u32 actmon_readl(struct tegra_devfreq *tegra, u32 offset)
+{
+ return readl(tegra->regs + offset);
+}
+
+static void actmon_writel(struct tegra_devfreq *tegra, u32 val, u32 offset)
+{
+ writel(val, tegra->regs + offset);
+}
+
+static u32 device_readl(struct tegra_devfreq_device *dev, u32 offset)
+{
+ return readl(dev->regs + offset);
+}
+
+static void device_writel(struct tegra_devfreq_device *dev, u32 val,
+ u32 offset)
+{
+ writel(val, dev->regs + offset);
+}
+
static unsigned long do_percent(unsigned long val, unsigned int pct)
{
return val * pct / 100;
}
-static void tegra_devfreq_update_avg_wmark(struct tegra_devfreq_device *dev)
+static void tegra_devfreq_update_avg_wmark(struct tegra_devfreq *tegra,
+ struct tegra_devfreq_device *dev)
{
u32 avg = dev->avg_count;
- u32 band = dev->avg_band_freq * ACTMON_SAMPLING_PERIOD;
+ u32 avg_band_freq = tegra->max_freq * ACTMON_DEFAULT_AVG_BAND / KHZ;
+ u32 band = avg_band_freq * ACTMON_SAMPLING_PERIOD;
+
+ device_writel(dev, avg + band, ACTMON_DEV_AVG_UPPER_WMARK);
- writel(avg + band, dev->regs + ACTMON_DEV_AVG_UPPER_WMARK);
- avg = max(avg, band);
- writel(avg - band, dev->regs + ACTMON_DEV_AVG_LOWER_WMARK);
+ avg = max(dev->avg_count, band);
+ device_writel(dev, avg - band, ACTMON_DEV_AVG_LOWER_WMARK);
}
static void tegra_devfreq_update_wmark(struct tegra_devfreq *tegra,
{
u32 val = tegra->cur_freq * ACTMON_SAMPLING_PERIOD;
- writel(do_percent(val, dev->config->boost_up_threshold),
- dev->regs + ACTMON_DEV_UPPER_WMARK);
+ device_writel(dev, do_percent(val, dev->config->boost_up_threshold),
+ ACTMON_DEV_UPPER_WMARK);
- writel(do_percent(val, dev->config->boost_down_threshold),
- dev->regs + ACTMON_DEV_LOWER_WMARK);
+ device_writel(dev, do_percent(val, dev->config->boost_down_threshold),
+ ACTMON_DEV_LOWER_WMARK);
}
static void actmon_write_barrier(struct tegra_devfreq *tegra)
{
/* ensure the update has reached the ACTMON */
wmb();
- readl(tegra->regs + ACTMON_GLB_STATUS);
+ actmon_readl(tegra, ACTMON_GLB_STATUS);
}
-static irqreturn_t actmon_isr(int irq, void *data)
+static void actmon_isr_device(struct tegra_devfreq *tegra,
+ struct tegra_devfreq_device *dev)
{
- struct tegra_devfreq *tegra = data;
- struct tegra_devfreq_device *dev = NULL;
unsigned long flags;
- u32 val;
- unsigned int i;
-
- val = readl(tegra->regs + ACTMON_GLB_STATUS);
-
- for (i = 0; i < ARRAY_SIZE(tegra->devices); i++) {
- if (val & tegra->devices[i].config->irq_mask) {
- dev = tegra->devices + i;
- break;
- }
- }
-
- if (!dev)
- return IRQ_NONE;
+ u32 intr_status, dev_ctrl;
- spin_lock_irqsave(&tegra->lock, flags);
+ spin_lock_irqsave(&dev->lock, flags);
- dev->avg_count = readl(dev->regs + ACTMON_DEV_AVG_COUNT);
- tegra_devfreq_update_avg_wmark(dev);
+ dev->avg_count = device_readl(dev, ACTMON_DEV_AVG_COUNT);
+ tegra_devfreq_update_avg_wmark(tegra, dev);
- val = readl(dev->regs + ACTMON_DEV_INTR_STATUS);
- if (val & ACTMON_DEV_INTR_CONSECUTIVE_UPPER) {
- val = readl(dev->regs + ACTMON_DEV_CTRL) |
- ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_EN |
- ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;
+ intr_status = device_readl(dev, ACTMON_DEV_INTR_STATUS);
+ dev_ctrl = device_readl(dev, ACTMON_DEV_CTRL);
+ if (intr_status & ACTMON_DEV_INTR_CONSECUTIVE_UPPER) {
/*
* new_boost = min(old_boost * up_coef + step, max_freq)
*/
dev->boost_freq = do_percent(dev->boost_freq,
dev->config->boost_up_coeff);
dev->boost_freq += ACTMON_BOOST_FREQ_STEP;
- if (dev->boost_freq >= tegra->max_freq) {
- dev->boost_freq = tegra->max_freq;
- val &= ~ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_EN;
- }
- writel(val, dev->regs + ACTMON_DEV_CTRL);
- } else if (val & ACTMON_DEV_INTR_CONSECUTIVE_LOWER) {
- val = readl(dev->regs + ACTMON_DEV_CTRL) |
- ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_EN |
- ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;
+ dev_ctrl |= ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;
+
+ if (dev->boost_freq >= tegra->max_freq)
+ dev->boost_freq = tegra->max_freq;
+ else
+ dev_ctrl |= ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_EN;
+ } else if (intr_status & ACTMON_DEV_INTR_CONSECUTIVE_LOWER) {
/*
* new_boost = old_boost * down_coef
* or 0 if (old_boost * down_coef < step / 2)
*/
dev->boost_freq = do_percent(dev->boost_freq,
dev->config->boost_down_coeff);
- if (dev->boost_freq < (ACTMON_BOOST_FREQ_STEP >> 1)) {
+
+ dev_ctrl |= ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_EN;
+
+ if (dev->boost_freq < (ACTMON_BOOST_FREQ_STEP >> 1))
dev->boost_freq = 0;
- val &= ~ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;
- }
- writel(val, dev->regs + ACTMON_DEV_CTRL);
+ else
+ dev_ctrl |= ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;
}
if (dev->config->avg_dependency_threshold) {
- val = readl(dev->regs + ACTMON_DEV_CTRL);
if (dev->avg_count >= dev->config->avg_dependency_threshold)
- val |= ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;
+ dev_ctrl |= ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;
else if (dev->boost_freq == 0)
- val &= ~ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;
- writel(val, dev->regs + ACTMON_DEV_CTRL);
+ dev_ctrl &= ~ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;
}
- writel(ACTMON_INTR_STATUS_CLEAR, dev->regs + ACTMON_DEV_INTR_STATUS);
+ device_writel(dev, dev_ctrl, ACTMON_DEV_CTRL);
+
+ device_writel(dev, ACTMON_INTR_STATUS_CLEAR, ACTMON_DEV_INTR_STATUS);
actmon_write_barrier(tegra);
- spin_unlock_irqrestore(&tegra->lock, flags);
+ spin_unlock_irqrestore(&dev->lock, flags);
+}
- return IRQ_WAKE_THREAD;
+static irqreturn_t actmon_isr(int irq, void *data)
+{
+ struct tegra_devfreq *tegra = data;
+ bool handled = false;
+ unsigned int i;
+ u32 val;
+
+ val = actmon_readl(tegra, ACTMON_GLB_STATUS);
+ for (i = 0; i < ARRAY_SIZE(tegra->devices); i++) {
+ if (val & tegra->devices[i].config->irq_mask) {
+ actmon_isr_device(tegra, tegra->devices + i);
+ handled = true;
+ }
+ }
+
+ return handled ? IRQ_WAKE_THREAD : IRQ_NONE;
}
static unsigned long actmon_cpu_to_emc_rate(struct tegra_devfreq *tegra,
static_cpu_emc_freq = actmon_cpu_to_emc_rate(tegra, cpu_freq);
}
- spin_lock_irqsave(&tegra->lock, flags);
+ spin_lock_irqsave(&dev->lock, flags);
dev->target_freq = dev->avg_count / ACTMON_SAMPLING_PERIOD;
avg_sustain_coef = 100 * 100 / dev->config->boost_up_threshold;
if (dev->avg_count >= dev->config->avg_dependency_threshold)
dev->target_freq = max(dev->target_freq, static_cpu_emc_freq);
- spin_unlock_irqrestore(&tegra->lock, flags);
+ spin_unlock_irqrestore(&dev->lock, flags);
}
static irqreturn_t actmon_thread_isr(int irq, void *data)
unsigned long action, void *ptr)
{
struct clk_notifier_data *data = ptr;
- struct tegra_devfreq *tegra = container_of(nb, struct tegra_devfreq,
- rate_change_nb);
+ struct tegra_devfreq *tegra;
+ struct tegra_devfreq_device *dev;
unsigned int i;
unsigned long flags;
- spin_lock_irqsave(&tegra->lock, flags);
+ if (action != POST_RATE_CHANGE)
+ return NOTIFY_OK;
- switch (action) {
- case POST_RATE_CHANGE:
- tegra->cur_freq = data->new_rate / KHZ;
+ tegra = container_of(nb, struct tegra_devfreq, rate_change_nb);
- for (i = 0; i < ARRAY_SIZE(tegra->devices); i++)
- tegra_devfreq_update_wmark(tegra, tegra->devices + i);
+ tegra->cur_freq = data->new_rate / KHZ;
- actmon_write_barrier(tegra);
- break;
- case PRE_RATE_CHANGE:
- /* fall through */
- case ABORT_RATE_CHANGE:
- break;
- };
+ for (i = 0; i < ARRAY_SIZE(tegra->devices); i++) {
+ dev = &tegra->devices[i];
- spin_unlock_irqrestore(&tegra->lock, flags);
+ spin_lock_irqsave(&dev->lock, flags);
+ tegra_devfreq_update_wmark(tegra, dev);
+ spin_unlock_irqrestore(&dev->lock, flags);
+ }
+
+ actmon_write_barrier(tegra);
return NOTIFY_OK;
}
-static void tegra_actmon_configure_device(struct tegra_devfreq *tegra,
- struct tegra_devfreq_device *dev)
+static void tegra_actmon_enable_interrupts(struct tegra_devfreq *tegra)
{
+ struct tegra_devfreq_device *dev;
u32 val;
+ unsigned int i;
- dev->avg_band_freq = tegra->max_freq * ACTMON_DEFAULT_AVG_BAND / KHZ;
- dev->target_freq = tegra->cur_freq;
-
- dev->avg_count = tegra->cur_freq * ACTMON_SAMPLING_PERIOD;
- writel(dev->avg_count, dev->regs + ACTMON_DEV_INIT_AVG);
-
- tegra_devfreq_update_avg_wmark(dev);
- tegra_devfreq_update_wmark(tegra, dev);
-
- writel(ACTMON_COUNT_WEIGHT, dev->regs + ACTMON_DEV_COUNT_WEIGHT);
- writel(ACTMON_INTR_STATUS_CLEAR, dev->regs + ACTMON_DEV_INTR_STATUS);
-
- val = 0;
- val |= ACTMON_DEV_CTRL_ENB_PERIODIC |
- ACTMON_DEV_CTRL_AVG_ABOVE_WMARK_EN |
- ACTMON_DEV_CTRL_AVG_BELOW_WMARK_EN;
- val |= (ACTMON_AVERAGE_WINDOW_LOG2 - 1)
- << ACTMON_DEV_CTRL_K_VAL_SHIFT;
- val |= (ACTMON_BELOW_WMARK_WINDOW - 1)
- << ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_NUM_SHIFT;
- val |= (ACTMON_ABOVE_WMARK_WINDOW - 1)
- << ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_NUM_SHIFT;
- val |= ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN |
- ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_EN;
-
- writel(val, dev->regs + ACTMON_DEV_CTRL);
+ for (i = 0; i < ARRAY_SIZE(tegra->devices); i++) {
+ dev = &tegra->devices[i];
- actmon_write_barrier(tegra);
+ val = device_readl(dev, ACTMON_DEV_CTRL);
+ val |= ACTMON_DEV_CTRL_AVG_ABOVE_WMARK_EN;
+ val |= ACTMON_DEV_CTRL_AVG_BELOW_WMARK_EN;
+ val |= ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;
+ val |= ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_EN;
- val = readl(dev->regs + ACTMON_DEV_CTRL);
- val |= ACTMON_DEV_CTRL_ENB;
- writel(val, dev->regs + ACTMON_DEV_CTRL);
+ device_writel(dev, val, ACTMON_DEV_CTRL);
+ }
actmon_write_barrier(tegra);
}
-static int tegra_devfreq_suspend(struct device *dev)
+static void tegra_actmon_disable_interrupts(struct tegra_devfreq *tegra)
{
- struct platform_device *pdev;
- struct tegra_devfreq *tegra;
- struct tegra_devfreq_device *actmon_dev;
- unsigned int i;
+ struct tegra_devfreq_device *dev;
u32 val;
-
- pdev = container_of(dev, struct platform_device, dev);
- tegra = platform_get_drvdata(pdev);
+ unsigned int i;
for (i = 0; i < ARRAY_SIZE(tegra->devices); i++) {
- actmon_dev = &tegra->devices[i];
-
- val = readl(actmon_dev->regs + ACTMON_DEV_CTRL);
- val &= ~ACTMON_DEV_CTRL_ENB;
- writel(val, actmon_dev->regs + ACTMON_DEV_CTRL);
+ dev = &tegra->devices[i];
- writel(ACTMON_INTR_STATUS_CLEAR,
- actmon_dev->regs + ACTMON_DEV_INTR_STATUS);
+ val = device_readl(dev, ACTMON_DEV_CTRL);
+ val &= ~ACTMON_DEV_CTRL_AVG_ABOVE_WMARK_EN;
+ val &= ~ACTMON_DEV_CTRL_AVG_BELOW_WMARK_EN;
+ val &= ~ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;
+ val &= ~ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_EN;
- actmon_write_barrier(tegra);
+ device_writel(dev, val, ACTMON_DEV_CTRL);
}
- return 0;
+ actmon_write_barrier(tegra);
}
-static int tegra_devfreq_resume(struct device *dev)
+static void tegra_actmon_configure_device(struct tegra_devfreq *tegra,
+ struct tegra_devfreq_device *dev)
{
- struct platform_device *pdev;
- struct tegra_devfreq *tegra;
- struct tegra_devfreq_device *actmon_dev;
- unsigned int i;
+ u32 val = 0;
- pdev = container_of(dev, struct platform_device, dev);
- tegra = platform_get_drvdata(pdev);
+ dev->target_freq = tegra->cur_freq;
- for (i = 0; i < ARRAY_SIZE(tegra->devices); i++) {
- actmon_dev = &tegra->devices[i];
+ dev->avg_count = tegra->cur_freq * ACTMON_SAMPLING_PERIOD;
+ device_writel(dev, dev->avg_count, ACTMON_DEV_INIT_AVG);
- tegra_actmon_configure_device(tegra, actmon_dev);
- }
+ tegra_devfreq_update_avg_wmark(tegra, dev);
+ tegra_devfreq_update_wmark(tegra, dev);
- return 0;
+ device_writel(dev, ACTMON_COUNT_WEIGHT, ACTMON_DEV_COUNT_WEIGHT);
+ device_writel(dev, ACTMON_INTR_STATUS_CLEAR, ACTMON_DEV_INTR_STATUS);
+
+ val |= ACTMON_DEV_CTRL_ENB_PERIODIC;
+ val |= (ACTMON_AVERAGE_WINDOW_LOG2 - 1)
+ << ACTMON_DEV_CTRL_K_VAL_SHIFT;
+ val |= (ACTMON_BELOW_WMARK_WINDOW - 1)
+ << ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_NUM_SHIFT;
+ val |= (ACTMON_ABOVE_WMARK_WINDOW - 1)
+ << ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_NUM_SHIFT;
+ val |= ACTMON_DEV_CTRL_ENB;
+
+ device_writel(dev, val, ACTMON_DEV_CTRL);
+
+ actmon_write_barrier(tegra);
}
static int tegra_devfreq_target(struct device *dev, unsigned long *freq,
u32 flags)
{
- struct platform_device *pdev;
- struct tegra_devfreq *tegra;
+ struct tegra_devfreq *tegra = dev_get_drvdata(dev);
struct dev_pm_opp *opp;
unsigned long rate = *freq * KHZ;
- pdev = container_of(dev, struct platform_device, dev);
- tegra = platform_get_drvdata(pdev);
-
rcu_read_lock();
opp = devfreq_recommended_opp(dev, &rate, flags);
if (IS_ERR(opp)) {
rate = dev_pm_opp_get_freq(opp);
rcu_read_unlock();
- /* TODO: Once we have per-user clk constraints, set a floor */
- clk_set_rate(tegra->emc_clock, rate);
-
- /* TODO: Set voltage as well */
+ clk_set_min_rate(tegra->emc_clock, rate);
+ clk_set_rate(tegra->emc_clock, 0);
return 0;
}
static int tegra_devfreq_get_dev_status(struct device *dev,
struct devfreq_dev_status *stat)
{
- struct platform_device *pdev;
- struct tegra_devfreq *tegra;
+ struct tegra_devfreq *tegra = dev_get_drvdata(dev);
struct tegra_devfreq_device *actmon_dev;
- pdev = container_of(dev, struct platform_device, dev);
- tegra = platform_get_drvdata(pdev);
-
stat->current_frequency = tegra->cur_freq;
/* To be used by the tegra governor */
actmon_dev = &tegra->devices[MCALL];
/* Number of cycles spent on memory access */
- stat->busy_time = actmon_dev->avg_count;
+ stat->busy_time = device_readl(actmon_dev, ACTMON_DEV_AVG_COUNT);
/* The bus can be considered to be saturated way before 100% */
stat->busy_time *= 100 / BUS_SATURATION_RATIO;
/* Number of cycles in a sampling period */
stat->total_time = ACTMON_SAMPLING_PERIOD * tegra->cur_freq;
+ stat->busy_time = min(stat->busy_time, stat->total_time);
+
return 0;
}
-static int tegra_devfreq_get_target(struct devfreq *devfreq,
- unsigned long *freq)
+static struct devfreq_dev_profile tegra_devfreq_profile = {
+ .polling_ms = 0,
+ .target = tegra_devfreq_target,
+ .get_dev_status = tegra_devfreq_get_dev_status,
+};
+
+static int tegra_governor_get_target(struct devfreq *devfreq,
+ unsigned long *freq)
{
struct devfreq_dev_status stat;
struct tegra_devfreq *tegra;
return 0;
}
-static int tegra_devfreq_event_handler(struct devfreq *devfreq,
- unsigned int event, void *data)
+static int tegra_governor_event_handler(struct devfreq *devfreq,
+ unsigned int event, void *data)
{
- return 0;
+ struct tegra_devfreq *tegra;
+ int ret = 0;
+
+ tegra = dev_get_drvdata(devfreq->dev.parent);
+
+ switch (event) {
+ case DEVFREQ_GOV_START:
+ devfreq_monitor_start(devfreq);
+ tegra_actmon_enable_interrupts(tegra);
+ break;
+
+ case DEVFREQ_GOV_STOP:
+ tegra_actmon_disable_interrupts(tegra);
+ devfreq_monitor_stop(devfreq);
+ break;
+
+ case DEVFREQ_GOV_SUSPEND:
+ tegra_actmon_disable_interrupts(tegra);
+ devfreq_monitor_suspend(devfreq);
+ break;
+
+ case DEVFREQ_GOV_RESUME:
+ devfreq_monitor_resume(devfreq);
+ tegra_actmon_enable_interrupts(tegra);
+ break;
+ }
+
+ return ret;
}
static struct devfreq_governor tegra_devfreq_governor = {
- .name = "tegra",
- .get_target_freq = tegra_devfreq_get_target,
- .event_handler = tegra_devfreq_event_handler,
-};
-
-static struct devfreq_dev_profile tegra_devfreq_profile = {
- .polling_ms = 0,
- .target = tegra_devfreq_target,
- .get_dev_status = tegra_devfreq_get_dev_status,
+ .name = "tegra_actmon",
+ .get_target_freq = tegra_governor_get_target,
+ .event_handler = tegra_governor_event_handler,
};
static int tegra_devfreq_probe(struct platform_device *pdev)
struct tegra_devfreq *tegra;
struct tegra_devfreq_device *dev;
struct resource *res;
- unsigned long max_freq;
unsigned int i;
+ unsigned long rate;
int irq;
int err;
if (!tegra)
return -ENOMEM;
- spin_lock_init(&tegra->lock);
-
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(&pdev->dev, "Failed to get regs resource\n");
- return -ENODEV;
- }
tegra->regs = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(tegra->regs)) {
- dev_err(&pdev->dev, "Failed to get IO memory\n");
+ if (IS_ERR(tegra->regs))
return PTR_ERR(tegra->regs);
- }
tegra->reset = devm_reset_control_get(&pdev->dev, "actmon");
if (IS_ERR(tegra->reset)) {
return PTR_ERR(tegra->emc_clock);
}
- err = of_init_opp_table(&pdev->dev);
- if (err) {
- dev_err(&pdev->dev, "Failed to init operating point table\n");
- return err;
- }
+ clk_set_rate(tegra->emc_clock, ULONG_MAX);
tegra->rate_change_nb.notifier_call = tegra_actmon_rate_notify_cb;
err = clk_notifier_register(tegra->emc_clock, &tegra->rate_change_nb);
err = clk_prepare_enable(tegra->clock);
if (err) {
- reset_control_deassert(tegra->reset);
+ dev_err(&pdev->dev,
+ "Failed to prepare and enable ACTMON clock\n");
return err;
}
reset_control_deassert(tegra->reset);
- max_freq = clk_round_rate(tegra->emc_clock, ULONG_MAX);
- tegra->max_freq = max_freq / KHZ;
-
- clk_set_rate(tegra->emc_clock, max_freq);
-
+ tegra->max_freq = clk_round_rate(tegra->emc_clock, ULONG_MAX) / KHZ;
tegra->cur_freq = clk_get_rate(tegra->emc_clock) / KHZ;
- writel(ACTMON_SAMPLING_PERIOD - 1,
- tegra->regs + ACTMON_GLB_PERIOD_CTRL);
+ actmon_writel(tegra, ACTMON_SAMPLING_PERIOD - 1,
+ ACTMON_GLB_PERIOD_CTRL);
for (i = 0; i < ARRAY_SIZE(actmon_device_configs); i++) {
dev = tegra->devices + i;
dev->config = actmon_device_configs + i;
dev->regs = tegra->regs + dev->config->offset;
+ spin_lock_init(&dev->lock);
- tegra_actmon_configure_device(tegra, tegra->devices + i);
+ tegra_actmon_configure_device(tegra, dev);
}
- err = devfreq_add_governor(&tegra_devfreq_governor);
- if (err) {
- dev_err(&pdev->dev, "Failed to add governor\n");
- return err;
+ for (rate = 0; rate <= tegra->max_freq * KHZ; rate++) {
+ rate = clk_round_rate(tegra->emc_clock, rate);
+ dev_pm_opp_add(&pdev->dev, rate, 0);
}
- tegra_devfreq_profile.initial_freq = clk_get_rate(tegra->emc_clock);
- tegra->devfreq = devm_devfreq_add_device(&pdev->dev,
- &tegra_devfreq_profile,
- "tegra",
- NULL);
-
irq = platform_get_irq(pdev, 0);
+ if (irq <= 0) {
+ dev_err(&pdev->dev, "Failed to get IRQ\n");
+ return -ENODEV;
+ }
+
+ platform_set_drvdata(pdev, tegra);
+
err = devm_request_threaded_irq(&pdev->dev, irq, actmon_isr,
actmon_thread_isr, IRQF_SHARED,
"tegra-devfreq", tegra);
return err;
}
- platform_set_drvdata(pdev, tegra);
+ tegra_devfreq_profile.initial_freq = clk_get_rate(tegra->emc_clock);
+ tegra->devfreq = devm_devfreq_add_device(&pdev->dev,
+ &tegra_devfreq_profile,
+ "tegra_actmon",
+ NULL);
return 0;
}
static int tegra_devfreq_remove(struct platform_device *pdev)
{
struct tegra_devfreq *tegra = platform_get_drvdata(pdev);
+ int irq = platform_get_irq(pdev, 0);
+ u32 val;
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(actmon_device_configs); i++) {
+ val = device_readl(&tegra->devices[i], ACTMON_DEV_CTRL);
+ val &= ~ACTMON_DEV_CTRL_ENB;
+ device_writel(&tegra->devices[i], val, ACTMON_DEV_CTRL);
+ }
+
+ actmon_write_barrier(tegra);
+
+ devm_free_irq(&pdev->dev, irq, tegra);
clk_notifier_unregister(tegra->emc_clock, &tegra->rate_change_nb);
return 0;
}
-static SIMPLE_DEV_PM_OPS(tegra_devfreq_pm_ops,
- tegra_devfreq_suspend,
- tegra_devfreq_resume);
-
-static struct of_device_id tegra_devfreq_of_match[] = {
+static const struct of_device_id tegra_devfreq_of_match[] = {
{ .compatible = "nvidia,tegra124-actmon" },
{ },
};
+MODULE_DEVICE_TABLE(of, tegra_devfreq_of_match);
+
static struct platform_driver tegra_devfreq_driver = {
.probe = tegra_devfreq_probe,
.remove = tegra_devfreq_remove,
.driver = {
- .name = "tegra-devfreq",
- .owner = THIS_MODULE,
+ .name = "tegra-devfreq",
.of_match_table = tegra_devfreq_of_match,
- .pm = &tegra_devfreq_pm_ops,
},
};
-module_platform_driver(tegra_devfreq_driver);
-MODULE_LICENSE("GPL");
+static int __init tegra_devfreq_init(void)
+{
+ int ret = 0;
+
+ ret = devfreq_add_governor(&tegra_devfreq_governor);
+ if (ret) {
+ pr_err("%s: failed to add governor: %d\n", __func__, ret);
+ return ret;
+ }
+
+ ret = platform_driver_register(&tegra_devfreq_driver);
+ if (ret)
+ devfreq_remove_governor(&tegra_devfreq_governor);
+
+ return ret;
+}
+module_init(tegra_devfreq_init)
+
+static void __exit tegra_devfreq_exit(void)
+{
+ int ret = 0;
+
+ platform_driver_unregister(&tegra_devfreq_driver);
+
+ ret = devfreq_remove_governor(&tegra_devfreq_governor);
+ if (ret)
+ pr_err("%s: failed to remove governor: %d\n", __func__, ret);
+}
+module_exit(tegra_devfreq_exit)
+
+MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Tegra devfreq driver");
MODULE_AUTHOR("Tomeu Vizoso <tomeu.vizoso@collabora.com>");
-MODULE_DEVICE_TABLE(of, tegra_devfreq_of_match);
enum of_gpio_flags;
+struct acpi_device;
+
/**
* struct acpi_gpio_info - ACPI GPIO specific information
* @gpioint: if %true this GPIO is of type GpioInt otherwise type is GpioIo
/* fast mode by default because of legacy reasons */
clk_freq = 400000;
- if (ACPI_COMPANION(&pdev->dev)) {
+ if (has_acpi_companion(&pdev->dev)) {
dw_i2c_acpi_configure(pdev);
} else if (pdev->dev.of_node) {
of_property_read_u32(pdev->dev.of_node,
pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
- if (ACPI_COMPANION(&pdev->dev))
+ if (has_acpi_companion(&pdev->dev))
dw_i2c_acpi_unconfigure(pdev);
return 0;
return AE_OK;
memset(&info, 0, sizeof(info));
- info.acpi_node.companion = adev;
+ info.fwnode = acpi_fwnode_handle(adev);
info.irq = -1;
INIT_LIST_HEAD(&resource_list);
client->dev.bus = &i2c_bus_type;
client->dev.type = &i2c_client_type;
client->dev.of_node = info->of_node;
- ACPI_COMPANION_SET(&client->dev, info->acpi_node.companion);
+ client->dev.fwnode = info->fwnode;
i2c_dev_set_name(adap, client);
status = device_register(&client->dev);
.remove = idepnp_remove,
};
-static int __init pnpide_init(void)
-{
- return pnp_register_driver(&idepnp_driver);
-}
-
-static void __exit pnpide_exit(void)
-{
- pnp_unregister_driver(&idepnp_driver);
-}
-
-module_init(pnpide_init);
-module_exit(pnpide_exit);
-
+module_pnp_driver(idepnp_driver);
MODULE_LICENSE("GPL");
.target_residency = 1,
.enter = &intel_idle,
.enter_freeze = intel_idle_freeze, },
- {
- .name = "C1E-BYT",
- .desc = "MWAIT 0x01",
- .flags = MWAIT2flg(0x01),
- .exit_latency = 15,
- .target_residency = 30,
- .enter = &intel_idle,
- .enter_freeze = intel_idle_freeze, },
{
.name = "C6N-BYT",
.desc = "MWAIT 0x58",
.flags = MWAIT2flg(0x58) | CPUIDLE_FLAG_TLB_FLUSHED,
- .exit_latency = 40,
+ .exit_latency = 300,
.target_residency = 275,
.enter = &intel_idle,
.enter_freeze = intel_idle_freeze, },
.name = "C6S-BYT",
.desc = "MWAIT 0x52",
.flags = MWAIT2flg(0x52) | CPUIDLE_FLAG_TLB_FLUSHED,
- .exit_latency = 140,
+ .exit_latency = 500,
.target_residency = 560,
.enter = &intel_idle,
.enter_freeze = intel_idle_freeze, },
.desc = "MWAIT 0x60",
.flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 1200,
- .target_residency = 1500,
+ .target_residency = 4000,
.enter = &intel_idle,
.enter_freeze = intel_idle_freeze, },
{
.enter = NULL }
};
+static struct cpuidle_state cht_cstates[] = {
+ {
+ .name = "C1-CHT",
+ .desc = "MWAIT 0x00",
+ .flags = MWAIT2flg(0x00),
+ .exit_latency = 1,
+ .target_residency = 1,
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
+ {
+ .name = "C6N-CHT",
+ .desc = "MWAIT 0x58",
+ .flags = MWAIT2flg(0x58) | CPUIDLE_FLAG_TLB_FLUSHED,
+ .exit_latency = 80,
+ .target_residency = 275,
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
+ {
+ .name = "C6S-CHT",
+ .desc = "MWAIT 0x52",
+ .flags = MWAIT2flg(0x52) | CPUIDLE_FLAG_TLB_FLUSHED,
+ .exit_latency = 200,
+ .target_residency = 560,
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
+ {
+ .name = "C7-CHT",
+ .desc = "MWAIT 0x60",
+ .flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TLB_FLUSHED,
+ .exit_latency = 1200,
+ .target_residency = 4000,
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
+ {
+ .name = "C7S-CHT",
+ .desc = "MWAIT 0x64",
+ .flags = MWAIT2flg(0x64) | CPUIDLE_FLAG_TLB_FLUSHED,
+ .exit_latency = 10000,
+ .target_residency = 20000,
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
+ {
+ .enter = NULL }
+};
+
static struct cpuidle_state ivb_cstates[] = {
{
.name = "C1-IVB",
.byt_auto_demotion_disable_flag = true,
};
+static const struct idle_cpu idle_cpu_cht = {
+ .state_table = cht_cstates,
+ .disable_promotion_to_c1e = true,
+ .byt_auto_demotion_disable_flag = true,
+};
+
static const struct idle_cpu idle_cpu_ivb = {
.state_table = ivb_cstates,
.disable_promotion_to_c1e = true,
#define ICPU(model, cpu) \
{ X86_VENDOR_INTEL, 6, model, X86_FEATURE_MWAIT, (unsigned long)&cpu }
-static const struct x86_cpu_id intel_idle_ids[] = {
+static const struct x86_cpu_id intel_idle_ids[] __initconst = {
ICPU(0x1a, idle_cpu_nehalem),
ICPU(0x1e, idle_cpu_nehalem),
ICPU(0x1f, idle_cpu_nehalem),
ICPU(0x2d, idle_cpu_snb),
ICPU(0x36, idle_cpu_atom),
ICPU(0x37, idle_cpu_byt),
+ ICPU(0x4c, idle_cpu_cht),
ICPU(0x3a, idle_cpu_ivb),
ICPU(0x3e, idle_cpu_ivt),
ICPU(0x3c, idle_cpu_hsw),
if (dev_is_pci(dev)) {
pdev = to_pci_dev(dev);
segment = pci_domain_nr(pdev->bus);
- } else if (ACPI_COMPANION(dev))
+ } else if (has_acpi_companion(dev))
dev = &ACPI_COMPANION(dev)->dev;
rcu_read_lock();
.shutdown = ene_shutdown,
};
-static int __init ene_init(void)
-{
- return pnp_register_driver(&ene_driver);
-}
-
-static void ene_exit(void)
-{
- pnp_unregister_driver(&ene_driver);
-}
-
module_param(sample_period, int, S_IRUGO);
MODULE_PARM_DESC(sample_period, "Hardware sample period (50 us default)");
MODULE_AUTHOR("Maxim Levitsky");
MODULE_LICENSE("GPL");
-module_init(ene_init);
-module_exit(ene_exit);
+module_pnp_driver(ene_driver);
.shutdown = fintek_shutdown,
};
-static int __init fintek_init(void)
-{
- return pnp_register_driver(&fintek_driver);
-}
-
-static void __exit fintek_exit(void)
-{
- pnp_unregister_driver(&fintek_driver);
-}
-
module_param(debug, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Enable debugging output");
MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>");
MODULE_LICENSE("GPL");
-module_init(fintek_init);
-module_exit(fintek_exit);
+module_pnp_driver(fintek_driver);
.shutdown = ite_shutdown,
};
-static int __init ite_init(void)
-{
- return pnp_register_driver(&ite_driver);
-}
-
-static void __exit ite_exit(void)
-{
- pnp_unregister_driver(&ite_driver);
-}
-
MODULE_DEVICE_TABLE(pnp, ite_ids);
MODULE_DESCRIPTION("ITE Tech Inc. IT8712F/ITE8512F CIR driver");
MODULE_AUTHOR("Juan J. Garcia de Soria <skandalfo@gmail.com>");
MODULE_LICENSE("GPL");
-module_init(ite_init);
-module_exit(ite_exit);
+module_pnp_driver(ite_driver);
.shutdown = nvt_shutdown,
};
-static int __init nvt_init(void)
-{
- return pnp_register_driver(&nvt_driver);
-}
-
-static void __exit nvt_exit(void)
-{
- pnp_unregister_driver(&nvt_driver);
-}
-
module_param(debug, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Enable debugging output");
MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>");
MODULE_LICENSE("GPL");
-module_init(nvt_init);
-module_exit(nvt_exit);
+module_pnp_driver(nvt_driver);
MODULE_DESCRIPTION("General Instruments SB1000 driver");
MODULE_LICENSE("GPL");
-static int __init
-sb1000_init(void)
-{
- return pnp_register_driver(&sb1000_driver);
-}
-
-static void __exit
-sb1000_exit(void)
-{
- pnp_unregister_driver(&sb1000_driver);
-}
-
-module_init(sb1000_init);
-module_exit(sb1000_exit);
+module_pnp_driver(sb1000_driver);
},
};
-static int __init apple_gmux_init(void)
-{
- return pnp_register_driver(&gmux_pnp_driver);
-}
-
-static void __exit apple_gmux_exit(void)
-{
- pnp_unregister_driver(&gmux_pnp_driver);
-}
-
-module_init(apple_gmux_init);
-module_exit(apple_gmux_exit);
-
+module_pnp_driver(gmux_pnp_driver);
MODULE_AUTHOR("Seth Forshee <seth.forshee@canonical.com>");
MODULE_DESCRIPTION("Apple Gmux Driver");
MODULE_LICENSE("GPL");
* Bjorn Helgaas <bjorn.helgaas@hp.com>
*/
-extern spinlock_t pnp_lock;
+extern struct mutex pnp_lock;
extern const struct attribute_group *pnp_dev_groups[];
void *pnp_alloc(long size);
*/
#include <linux/module.h>
+#include <linux/mutex.h>
#include <linux/ctype.h>
#include <linux/slab.h>
#include <linux/pnp.h>
}
pnp_interface_attach_card(card);
- spin_lock(&pnp_lock);
+ mutex_lock(&pnp_lock);
list_add_tail(&card->global_list, &pnp_cards);
list_add_tail(&card->protocol_list, &card->protocol->cards);
- spin_unlock(&pnp_lock);
+ mutex_unlock(&pnp_lock);
/* we wait until now to add devices in order to ensure the drivers
* will be able to use all of the related devices on the card
struct list_head *pos, *temp;
device_unregister(&card->dev);
- spin_lock(&pnp_lock);
+ mutex_lock(&pnp_lock);
list_del(&card->global_list);
list_del(&card->protocol_list);
- spin_unlock(&pnp_lock);
+ mutex_unlock(&pnp_lock);
list_for_each_safe(pos, temp, &card->devices) {
struct pnp_dev *dev = card_to_pnp_dev(pos);
pnp_remove_card_device(dev);
dev->card_link = NULL;
dev_set_name(&dev->dev, "%02x:%02x.%02x",
dev->protocol->number, card->number, dev->number);
- spin_lock(&pnp_lock);
+ mutex_lock(&pnp_lock);
dev->card = card;
list_add_tail(&dev->card_list, &card->devices);
- spin_unlock(&pnp_lock);
+ mutex_unlock(&pnp_lock);
return 0;
}
*/
void pnp_remove_card_device(struct pnp_dev *dev)
{
- spin_lock(&pnp_lock);
+ mutex_lock(&pnp_lock);
dev->card = NULL;
list_del(&dev->card_list);
- spin_unlock(&pnp_lock);
+ mutex_unlock(&pnp_lock);
__pnp_remove_device(dev);
}
if (error < 0)
return error;
- spin_lock(&pnp_lock);
+ mutex_lock(&pnp_lock);
list_add_tail(&drv->global_list, &pnp_card_drivers);
- spin_unlock(&pnp_lock);
+ mutex_unlock(&pnp_lock);
list_for_each_safe(pos, temp, &pnp_cards) {
struct pnp_card *card =
*/
void pnp_unregister_card_driver(struct pnp_card_driver *drv)
{
- spin_lock(&pnp_lock);
+ mutex_lock(&pnp_lock);
list_del(&drv->global_list);
- spin_unlock(&pnp_lock);
+ mutex_unlock(&pnp_lock);
pnp_unregister_driver(&drv->link);
}
#include <linux/list.h>
#include <linux/device.h>
#include <linux/module.h>
+#include <linux/mutex.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/slab.h>
static LIST_HEAD(pnp_protocols);
LIST_HEAD(pnp_global);
-DEFINE_SPINLOCK(pnp_lock);
+DEFINE_MUTEX(pnp_lock);
/*
* ACPI or PNPBIOS should tell us about all platform devices, so we can
return result;
}
+static void pnp_remove_protocol(struct pnp_protocol *protocol)
+{
+ mutex_lock(&pnp_lock);
+ list_del(&protocol->protocol_list);
+ mutex_unlock(&pnp_lock);
+}
+
/**
* pnp_protocol_register - adds a pnp protocol to the pnp layer
* @protocol: pointer to the corresponding pnp_protocol structure
*/
int pnp_register_protocol(struct pnp_protocol *protocol)
{
- int nodenum;
struct list_head *pos;
+ int nodenum, ret;
INIT_LIST_HEAD(&protocol->devices);
INIT_LIST_HEAD(&protocol->cards);
nodenum = 0;
- spin_lock(&pnp_lock);
+
+ mutex_lock(&pnp_lock);
/* assign the lowest unused number */
list_for_each(pos, &pnp_protocols) {
}
}
- list_add_tail(&protocol->protocol_list, &pnp_protocols);
- spin_unlock(&pnp_lock);
-
protocol->number = nodenum;
dev_set_name(&protocol->dev, "pnp%d", nodenum);
- return device_register(&protocol->dev);
+
+ list_add_tail(&protocol->protocol_list, &pnp_protocols);
+
+ mutex_unlock(&pnp_lock);
+
+ ret = device_register(&protocol->dev);
+ if (ret)
+ pnp_remove_protocol(protocol);
+
+ return ret;
}
/**
*/
void pnp_unregister_protocol(struct pnp_protocol *protocol)
{
- spin_lock(&pnp_lock);
- list_del(&protocol->protocol_list);
- spin_unlock(&pnp_lock);
+ pnp_remove_protocol(protocol);
device_unregister(&protocol->dev);
}
return dev;
}
+static void pnp_delist_device(struct pnp_dev *dev)
+{
+ mutex_lock(&pnp_lock);
+ list_del(&dev->global_list);
+ list_del(&dev->protocol_list);
+ mutex_unlock(&pnp_lock);
+}
+
int __pnp_add_device(struct pnp_dev *dev)
{
+ int ret;
+
pnp_fixup_device(dev);
dev->status = PNP_READY;
- spin_lock(&pnp_lock);
+
+ mutex_lock(&pnp_lock);
+
list_add_tail(&dev->global_list, &pnp_global);
list_add_tail(&dev->protocol_list, &dev->protocol->devices);
- spin_unlock(&pnp_lock);
- if (dev->protocol->can_wakeup)
+
+ mutex_unlock(&pnp_lock);
+
+ ret = device_register(&dev->dev);
+ if (ret)
+ pnp_delist_device(dev);
+ else if (dev->protocol->can_wakeup)
device_set_wakeup_capable(&dev->dev,
dev->protocol->can_wakeup(dev));
- return device_register(&dev->dev);
+
+ return ret;
}
/*
void __pnp_remove_device(struct pnp_dev *dev)
{
- spin_lock(&pnp_lock);
- list_del(&dev->global_list);
- list_del(&dev->protocol_list);
- spin_unlock(&pnp_lock);
+ pnp_delist_device(dev);
device_unregister(&dev->dev);
}
int pnp_device_attach(struct pnp_dev *pnp_dev)
{
- spin_lock(&pnp_lock);
+ mutex_lock(&pnp_lock);
if (pnp_dev->status != PNP_READY) {
- spin_unlock(&pnp_lock);
+ mutex_unlock(&pnp_lock);
return -EBUSY;
}
pnp_dev->status = PNP_ATTACHED;
- spin_unlock(&pnp_lock);
+ mutex_unlock(&pnp_lock);
return 0;
}
void pnp_device_detach(struct pnp_dev *pnp_dev)
{
- spin_lock(&pnp_lock);
+ mutex_lock(&pnp_lock);
if (pnp_dev->status == PNP_ATTACHED)
pnp_dev->status = PNP_READY;
- spin_unlock(&pnp_lock);
+ mutex_unlock(&pnp_lock);
pnp_disable_dev(pnp_dev);
}
if (!dev)
return -ENOMEM;
+ ACPI_COMPANION_SET(&dev->dev, device);
dev->data = device;
/* .enabled means the device can decode the resources */
dev->active = device->status.enabled;
return error;
}
- error = acpi_bind_one(&dev->dev, device);
-
num++;
- return error;
+ return 0;
}
static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle,
.driver_data = (kernel_ulong_t)&_ops, \
}
-static const struct x86_cpu_id rapl_ids[] = {
+static const struct x86_cpu_id rapl_ids[] __initconst = {
RAPL_CPU(0x2a, rapl_defaults_core),/* Sandy Bridge */
RAPL_CPU(0x2d, rapl_defaults_core),/* Sandy Bridge EP */
RAPL_CPU(0x37, rapl_defaults_atom),/* Valleyview */
RAPL_CPU(0x3c, rapl_defaults_core),/* Haswell */
RAPL_CPU(0x3d, rapl_defaults_core),/* Broadwell */
RAPL_CPU(0x3f, rapl_defaults_hsw_server),/* Haswell servers */
+ RAPL_CPU(0x4f, rapl_defaults_hsw_server),/* Broadwell servers */
RAPL_CPU(0x45, rapl_defaults_core),/* Haswell ULT */
RAPL_CPU(0x4C, rapl_defaults_atom),/* Braswell */
RAPL_CPU(0x4A, rapl_defaults_atom),/* Tangier */
.id_table = fintek_dev_table,
};
-static int fintek_8250_init(void)
-{
- return pnp_register_driver(&fintek_8250_driver);
-}
-module_init(fintek_8250_init);
-
-static void fintek_8250_exit(void)
-{
- pnp_unregister_driver(&fintek_8250_driver);
-}
-module_exit(fintek_8250_exit);
-
+module_pnp_driver(fintek_8250_driver);
MODULE_DESCRIPTION("Fintek F812164 module");
MODULE_AUTHOR("Ricardo Ribalda <ricardo.ribalda@gmail.com>");
MODULE_LICENSE("GPL");
#define DRV_VERSION "1.11"
/* Includes */
+#include <linux/acpi.h> /* For ACPI support */
#include <linux/module.h> /* For module specific items */
#include <linux/moduleparam.h> /* For new moduleparam's */
#include <linux/types.h> /* For standard types (like size_t) */
struct platform_device *dev;
/* the PCI-device */
struct pci_dev *pdev;
+ /* whether or not the watchdog has been suspended */
+ bool suspended;
} iTCO_wdt_private;
/* module parameters */
iTCO_wdt_stop(NULL);
}
+#ifdef CONFIG_PM_SLEEP
+/*
+ * Suspend-to-idle requires this, because it stops the ticks and timekeeping, so
+ * the watchdog cannot be pinged while in that state. In ACPI sleep states the
+ * watchdog is stopped by the platform firmware.
+ */
+
+#ifdef CONFIG_ACPI
+static inline bool need_suspend(void)
+{
+ return acpi_target_system_state() == ACPI_STATE_S0;
+}
+#else
+static inline bool need_suspend(void) { return true; }
+#endif
+
+static int iTCO_wdt_suspend_noirq(struct device *dev)
+{
+ int ret = 0;
+
+ iTCO_wdt_private.suspended = false;
+ if (watchdog_active(&iTCO_wdt_watchdog_dev) && need_suspend()) {
+ ret = iTCO_wdt_stop(&iTCO_wdt_watchdog_dev);
+ if (!ret)
+ iTCO_wdt_private.suspended = true;
+ }
+ return ret;
+}
+
+static int iTCO_wdt_resume_noirq(struct device *dev)
+{
+ if (iTCO_wdt_private.suspended)
+ iTCO_wdt_start(&iTCO_wdt_watchdog_dev);
+
+ return 0;
+}
+
+static struct dev_pm_ops iTCO_wdt_pm = {
+ .suspend_noirq = iTCO_wdt_suspend_noirq,
+ .resume_noirq = iTCO_wdt_resume_noirq,
+};
+
+#define ITCO_WDT_PM_OPS (&iTCO_wdt_pm)
+#else
+#define ITCO_WDT_PM_OPS NULL
+#endif /* CONFIG_PM_SLEEP */
+
static struct platform_driver iTCO_wdt_driver = {
.probe = iTCO_wdt_probe,
.remove = iTCO_wdt_remove,
.shutdown = iTCO_wdt_shutdown,
.driver = {
.name = DRV_NAME,
+ .pm = ITCO_WDT_PM_OPS,
},
};
#define acpi_device_bid(d) ((d)->pnp.bus_id)
#define acpi_device_adr(d) ((d)->pnp.bus_address)
const char *acpi_device_hid(struct acpi_device *device);
+#define acpi_device_uid(d) ((d)->pnp.unique_id)
#define acpi_device_name(d) ((d)->pnp.device_name)
#define acpi_device_class(d) ((d)->pnp.device_class)
static inline struct acpi_device *acpi_node(struct fwnode_handle *fwnode)
{
- return fwnode ? container_of(fwnode, struct acpi_device, fwnode) : NULL;
+ return is_acpi_node(fwnode) ?
+ container_of(fwnode, struct acpi_device, fwnode) : NULL;
}
static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev)
#define IOMMU_OF_TABLES() OF_TABLE(CONFIG_OF_IOMMU, iommu)
#define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
#define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method)
+#define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
#define EARLYCON_OF_TABLES() OF_TABLE(CONFIG_SERIAL_EARLYCON, earlycon)
#define KERNEL_DTB() \
CLKSRC_OF_TABLES() \
IOMMU_OF_TABLES() \
CPU_METHOD_OF_TABLES() \
+ CPUIDLE_METHOD_OF_TABLES() \
KERNEL_DTB() \
IRQCHIP_OF_MATCH_TABLE() \
EARLYCON_OF_TABLES()
return adev ? adev->handle : NULL;
}
-#define ACPI_COMPANION(dev) ((dev)->acpi_node.companion)
-#define ACPI_COMPANION_SET(dev, adev) ACPI_COMPANION(dev) = (adev)
+#define ACPI_COMPANION(dev) acpi_node((dev)->fwnode)
+#define ACPI_COMPANION_SET(dev, adev) set_primary_fwnode(dev, (adev) ? \
+ acpi_fwnode_handle(adev) : NULL)
#define ACPI_HANDLE(dev) acpi_device_handle(ACPI_COMPANION(dev))
+static inline bool has_acpi_companion(struct device *dev)
+{
+ return is_acpi_node(dev->fwnode);
+}
+
static inline void acpi_preset_companion(struct device *dev,
struct acpi_device *parent, u64 addr)
{
return NULL;
}
+static inline bool has_acpi_companion(struct device *dev)
+{
+ return false;
+}
+
static inline const char *acpi_dev_name(struct acpi_device *adev)
{
return NULL;
const char *name;
void *driver_data;
- struct devfreq_event_ops *ops;
+ const struct devfreq_event_ops *ops;
};
#if defined(CONFIG_PM_DEVFREQ_EVENT)
struct subsys_private;
struct bus_type;
struct device_node;
+struct fwnode_handle;
struct iommu_ops;
struct iommu_group;
unsigned long segment_boundary_mask;
};
-struct acpi_device;
-
-struct acpi_dev_node {
-#ifdef CONFIG_ACPI
- struct acpi_device *companion;
-#endif
-};
-
/**
* struct device - The basic device structure
* @parent: The device's "parent" device, the device to which it is attached.
* @cma_area: Contiguous memory area for dma allocations
* @archdata: For arch-specific additions.
* @of_node: Associated device tree node.
- * @acpi_node: Associated ACPI device node.
+ * @fwnode: Associated device node supplied by platform firmware.
* @devt: For creating the sysfs "dev".
* @id: device instance
* @devres_lock: Spinlock to protect the resource of the device.
struct dev_archdata archdata;
struct device_node *of_node; /* associated device tree node */
- struct acpi_dev_node acpi_node; /* associated ACPI device node */
+ struct fwnode_handle *fwnode; /* firmware device node */
dev_t devt; /* dev_t, creates the sysfs "dev" */
u32 id; /* device instance */
extern int lock_device_hotplug_sysfs(void);
extern int device_offline(struct device *dev);
extern int device_online(struct device *dev);
+extern void set_primary_fwnode(struct device *dev, struct fwnode_handle *fwnode);
+extern void set_secondary_fwnode(struct device *dev, struct fwnode_handle *fwnode);
+
/*
* Root device objects for grouping under /sys/devices
*/
--- /dev/null
+/*
+ * fwnode.h - Firmware device node object handle type definition.
+ *
+ * Copyright (C) 2015, Intel Corporation
+ * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _LINUX_FWNODE_H_
+#define _LINUX_FWNODE_H_
+
+enum fwnode_type {
+ FWNODE_INVALID = 0,
+ FWNODE_OF,
+ FWNODE_ACPI,
+ FWNODE_PDATA,
+};
+
+struct fwnode_handle {
+ enum fwnode_type type;
+ struct fwnode_handle *secondary;
+};
+
+#endif
* @platform_data: stored in i2c_client.dev.platform_data
* @archdata: copied into i2c_client.dev.archdata
* @of_node: pointer to OpenFirmware device node
- * @acpi_node: ACPI device node
+ * @fwnode: device node supplied by the platform firmware
* @irq: stored in i2c_client.irq
*
* I2C doesn't actually support hardware probing, although controllers and
void *platform_data;
struct dev_archdata *archdata;
struct device_node *of_node;
- struct acpi_dev_node acpi_node;
+ struct fwnode_handle *fwnode;
int irq;
};
struct platform_device_info {
struct device *parent;
- struct acpi_dev_node acpi_node;
+ struct fwnode_handle *fwnode;
const char *name;
int id;
--- /dev/null
+#ifndef PM_TRACE_H
+#define PM_TRACE_H
+
+#ifdef CONFIG_PM_TRACE
+#include <asm/pm-trace.h>
+#include <linux/types.h>
+
+extern int pm_trace_enabled;
+
+static inline int pm_trace_is_enabled(void)
+{
+ return pm_trace_enabled;
+}
+
+struct device;
+extern void set_trace_device(struct device *);
+extern void generate_pm_trace(const void *tracedata, unsigned int user);
+extern int show_trace_dev_match(char *buf, size_t size);
+
+#define TRACE_DEVICE(dev) do { \
+ if (pm_trace_enabled) \
+ set_trace_device(dev); \
+ } while(0)
+
+#else
+
+static inline int pm_trace_is_enabled(void) { return 0; }
+
+#define TRACE_DEVICE(dev) do { } while (0)
+#define TRACE_RESUME(dev) do { } while (0)
+#define TRACE_SUSPEND(dev) do { } while (0)
+
+#endif
+
+#endif
* Power domains provide callbacks that are executed during system suspend,
* hibernation, system resume and during runtime PM transitions along with
* subsystem-level and driver-level callbacks.
+ *
+ * @detach: Called when removing a device from the domain.
+ * @activate: Called before executing probe routines for bus types and drivers.
+ * @sync: Called after successful driver probe.
+ * @dismiss: Called after unsuccessful driver probe and after driver removal.
*/
struct dev_pm_domain {
struct dev_pm_ops ops;
void (*detach)(struct device *dev, bool power_off);
+ int (*activate)(struct device *dev);
+ void (*sync)(struct device *dev);
+ void (*dismiss)(struct device *dev);
};
/*
return to_gpd_data(dev->power.subsys_data->domain_data);
}
-extern struct generic_pm_domain *dev_to_genpd(struct device *dev);
+extern struct generic_pm_domain *pm_genpd_lookup_dev(struct device *dev);
extern int __pm_genpd_add_device(struct generic_pm_domain *genpd,
struct device *dev,
struct gpd_timing_data *td);
{
return ERR_PTR(-ENOSYS);
}
-static inline struct generic_pm_domain *dev_to_genpd(struct device *dev)
+static inline struct generic_pm_domain *pm_genpd_lookup_dev(struct device *dev)
{
- return ERR_PTR(-ENOSYS);
+ return NULL;
}
static inline int __pm_genpd_add_device(struct generic_pm_domain *genpd,
struct device *dev,
#endif /* CONFIG_PNP */
+/**
+ * module_pnp_driver() - Helper macro for registering a PnP driver
+ * @__pnp_driver: pnp_driver struct
+ *
+ * Helper macro for PnP drivers which do not do anything special in module
+ * init/exit. This eliminates a lot of boilerplate. Each module may only
+ * use this macro once, and calling it replaces module_init() and module_exit()
+ */
+#define module_pnp_driver(__pnp_driver) \
+ module_driver(__pnp_driver, pnp_register_driver, \
+ pnp_unregister_driver)
+
#endif /* _LINUX_PNP_H */
#ifndef _LINUX_PROPERTY_H_
#define _LINUX_PROPERTY_H_
+#include <linux/fwnode.h>
#include <linux/types.h>
struct device;
int device_property_read_string(struct device *dev, const char *propname,
const char **val);
-enum fwnode_type {
- FWNODE_INVALID = 0,
- FWNODE_OF,
- FWNODE_ACPI,
-};
-
-struct fwnode_handle {
- enum fwnode_type type;
-};
-
bool fwnode_property_present(struct fwnode_handle *fwnode, const char *propname);
int fwnode_property_read_u8_array(struct fwnode_handle *fwnode,
const char *propname, u8 *val,
return fwnode_property_read_u64_array(fwnode, propname, val, 1);
}
+/**
+ * struct property_entry - "Built-in" device property representation.
+ * @name: Name of the property.
+ * @type: Type of the property.
+ * @nval: Number of items of type @type making up the value.
+ * @value: Value of the property (an array of @nval items of type @type).
+ */
+struct property_entry {
+ const char *name;
+ enum dev_prop_type type;
+ size_t nval;
+ union {
+ void *raw_data;
+ u8 *u8_data;
+ u16 *u16_data;
+ u32 *u32_data;
+ u64 *u64_data;
+ const char **str;
+ } value;
+};
+
+/**
+ * struct property_set - Collection of "built-in" device properties.
+ * @fwnode: Handle to be pointed to by the fwnode field of struct device.
+ * @properties: Array of properties terminated with a null entry.
+ */
+struct property_set {
+ struct fwnode_handle fwnode;
+ struct property_entry *properties;
+};
+
+void device_add_property_set(struct device *dev, struct property_set *pset);
+
#endif /* _LINUX_PROPERTY_H_ */
+++ /dev/null
-#ifndef RESUME_TRACE_H
-#define RESUME_TRACE_H
-
-#ifdef CONFIG_PM_TRACE
-#include <asm/resume-trace.h>
-#include <linux/types.h>
-
-extern int pm_trace_enabled;
-
-static inline int pm_trace_is_enabled(void)
-{
- return pm_trace_enabled;
-}
-
-struct device;
-extern void set_trace_device(struct device *);
-extern void generate_resume_trace(const void *tracedata, unsigned int user);
-extern int show_trace_dev_match(char *buf, size_t size);
-
-#define TRACE_DEVICE(dev) do { \
- if (pm_trace_enabled) \
- set_trace_device(dev); \
- } while(0)
-
-#else
-
-static inline int pm_trace_is_enabled(void) { return 0; }
-
-#define TRACE_DEVICE(dev) do { } while (0)
-#define TRACE_RESUME(dev) do { } while (0)
-
-#endif
-
-#endif
#include <linux/export.h>
#include <linux/kobject.h>
#include <linux/string.h>
-#include <linux/resume-trace.h>
+#include <linux/pm-trace.h>
#include <linux/workqueue.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/ftrace.h>
#include <trace/events/power.h>
#include <linux/compiler.h>
+#include <linux/moduleparam.h>
#include "power.h"
suspend_ops->suspend_again() : false;
}
+#ifdef CONFIG_PM_DEBUG
+static unsigned int pm_test_delay = 5;
+module_param(pm_test_delay, uint, 0644);
+MODULE_PARM_DESC(pm_test_delay,
+ "Number of seconds to wait before resuming from suspend test");
+#endif
+
static int suspend_test(int level)
{
#ifdef CONFIG_PM_DEBUG
if (pm_test_level == level) {
- printk(KERN_INFO "suspend debug: Waiting for 5 seconds.\n");
- mdelay(5000);
+ printk(KERN_INFO "suspend debug: Waiting for %d second(s).\n",
+ pm_test_delay);
+ mdelay(pm_test_delay * 1000);
return 1;
}
#endif /* !CONFIG_PM_DEBUG */
projects / firefly-linux-kernel-4.4.55.git / commitdiff