#include <linux/clk.h>
#include <linux/err.h>
-#include <plat/omap_device.h>
#include <plat/omap-pm.h>
#ifdef CONFIG_PM_RUNTIME
# Common support
obj-y := id.o io.o control.o mux.o devices.o serial.o gpmc.o timer.o pm.o \
- common.o gpio.o dma.o wd_timer.o display.o i2c.o hdq1w.o omap_hwmod.o
+ common.o gpio.o dma.o wd_timer.o display.o i2c.o hdq1w.o omap_hwmod.o \
+ omap_device.o
# INTCPS IP block support - XXX should be moved to drivers/
obj-$(CONFIG_ARCH_OMAP2) += irq.o
#include <linux/err.h>
#include <linux/davinci_emac.h>
#include <asm/system.h>
-#include <plat/omap_device.h>
+#include "omap_device.h"
#include "am35xx.h"
#include "control.h"
#include "am35xx-emac.h"
#include "gpmc.h"
#include <linux/platform_data/mtd-nand-omap2.h>
#include <plat/usb.h>
-#include <plat/omap_device.h>
+#include "omap_device.h"
#include "mux.h"
#include "hsmmc.h"
#include "iomap.h"
#include <plat-omap/dma-omap.h>
#include <plat/omap_hwmod.h>
-#include <plat/omap_device.h>
+#include "omap_device.h"
#include "omap4-keypad.h"
#include "soc.h"
#include <video/omapdss.h>
#include <plat/omap_hwmod.h>
-#include <plat/omap_device.h>
+#include "omap_device.h"
#include <plat/omap-pm.h>
#include "common.h"
#include <linux/device.h>
#include <plat/omap_hwmod.h>
-#include <plat/omap_device.h>
#include <plat-omap/dma-omap.h>
+#include "omap_device.h"
+
#define OMAP2_DMA_STRIDE 0x60
static u32 errata;
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
-#include <plat/omap_device.h>
+#include "omap_device.h"
#include <plat/omap_hwmod.h>
#if defined(CONFIG_DRM_OMAP) || (CONFIG_DRM_OMAP_MODULE)
#include <linux/platform_data/gpio-omap.h>
#include <plat/omap_hwmod.h>
-#include <plat/omap_device.h>
+#include "omap_device.h"
#include <plat/omap-pm.h>
#include "powerdomain.h"
#include <asm/mach-types.h>
#include <plat/cpu.h>
-#include <plat/omap_device.h>
#include "soc.h"
#include "common.h"
+#include "omap_device.h"
#include "gpmc.h"
#define DEVICE_NAME "omap-gpmc"
#include <linux/platform_device.h>
#include <plat/omap_hwmod.h>
-#include <plat/omap_device.h>
+#include "omap_device.h"
#include "hdq1w.h"
#include "common.h"
#include <linux/platform_data/gpio-omap.h>
#include <plat/omap-pm.h>
-#include <plat/omap_device.h>
+#include "omap_device.h"
#include "mux.h"
#include "mmc.h"
#include <linux/hwspinlock.h>
#include <plat/omap_hwmod.h>
-#include <plat/omap_device.h>
+#include "omap_device.h"
static struct hwspinlock_pdata omap_hwspinlock_pdata __initdata = {
.base_id = 0,
#include "common.h"
#include <plat/omap_hwmod.h>
-#include <plat/omap_device.h>
+#include "omap_device.h"
#include "mux.h"
#include "i2c.h"
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/platform_data/asoc-ti-mcbsp.h>
+#include <linux/pm_runtime.h>
#include <plat-omap/dma-omap.h>
-#include <plat/omap_device.h>
-#include <linux/pm_runtime.h>
+
+#include "omap_device.h"
/*
* FIXME: Find a mechanism to enable/disable runtime the McBSP ICLK autoidle.
#include <linux/platform_data/gpio-omap.h>
#include <plat/omap_hwmod.h>
-#include <plat/omap_device.h>
-
#include "common.h"
#include "control.h"
+#include "omap_device.h"
#include "mux.h"
#include "mmc.h"
--- /dev/null
+/*
+ * omap_device implementation
+ *
+ * Copyright (C) 2009-2010 Nokia Corporation
+ * Paul Walmsley, Kevin Hilman
+ *
+ * Developed in collaboration with (alphabetical order): Benoit
+ * Cousson, Thara Gopinath, Tony Lindgren, Rajendra Nayak, Vikram
+ * Pandita, Sakari Poussa, Anand Sawant, Santosh Shilimkar, Richard
+ * Woodruff
+ *
+ * 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 code provides a consistent interface for OMAP device drivers
+ * to control power management and interconnect properties of their
+ * devices.
+ *
+ * In the medium- to long-term, this code should either be
+ * a) implemented via arch-specific pointers in platform_data
+ * or
+ * b) implemented as a proper omap_bus/omap_device in Linux, no more
+ * platform_data func pointers
+ *
+ *
+ * Guidelines for usage by driver authors:
+ *
+ * 1. These functions are intended to be used by device drivers via
+ * function pointers in struct platform_data. As an example,
+ * omap_device_enable() should be passed to the driver as
+ *
+ * struct foo_driver_platform_data {
+ * ...
+ * int (*device_enable)(struct platform_device *pdev);
+ * ...
+ * }
+ *
+ * Note that the generic "device_enable" name is used, rather than
+ * "omap_device_enable". This is so other architectures can pass in their
+ * own enable/disable functions here.
+ *
+ * This should be populated during device setup:
+ *
+ * ...
+ * pdata->device_enable = omap_device_enable;
+ * ...
+ *
+ * 2. Drivers should first check to ensure the function pointer is not null
+ * before calling it, as in:
+ *
+ * if (pdata->device_enable)
+ * pdata->device_enable(pdev);
+ *
+ * This allows other architectures that don't use similar device_enable()/
+ * device_shutdown() functions to execute normally.
+ *
+ * ...
+ *
+ * Suggested usage by device drivers:
+ *
+ * During device initialization:
+ * device_enable()
+ *
+ * During device idle:
+ * (save remaining device context if necessary)
+ * device_idle();
+ *
+ * During device resume:
+ * device_enable();
+ * (restore context if necessary)
+ *
+ * During device shutdown:
+ * device_shutdown()
+ * (device must be reinitialized at this point to use it again)
+ *
+ */
+#undef DEBUG
+
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <linux/pm_runtime.h>
+#include <linux/of.h>
+#include <linux/notifier.h>
+
+#include "omap_device.h"
+#include <plat/omap_hwmod.h>
+#include <plat/clock.h>
+
+/* These parameters are passed to _omap_device_{de,}activate() */
+#define USE_WAKEUP_LAT 0
+#define IGNORE_WAKEUP_LAT 1
+
+static int omap_early_device_register(struct platform_device *pdev);
+
+static struct omap_device_pm_latency omap_default_latency[] = {
+ {
+ .deactivate_func = omap_device_idle_hwmods,
+ .activate_func = omap_device_enable_hwmods,
+ .flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
+ }
+};
+
+/* Private functions */
+
+/**
+ * _omap_device_activate - increase device readiness
+ * @od: struct omap_device *
+ * @ignore_lat: increase to latency target (0) or full readiness (1)?
+ *
+ * Increase readiness of omap_device @od (thus decreasing device
+ * wakeup latency, but consuming more power). If @ignore_lat is
+ * IGNORE_WAKEUP_LAT, make the omap_device fully active. Otherwise,
+ * if @ignore_lat is USE_WAKEUP_LAT, and the device's maximum wakeup
+ * latency is greater than the requested maximum wakeup latency, step
+ * backwards in the omap_device_pm_latency table to ensure the
+ * device's maximum wakeup latency is less than or equal to the
+ * requested maximum wakeup latency. Returns 0.
+ */
+static int _omap_device_activate(struct omap_device *od, u8 ignore_lat)
+{
+ struct timespec a, b, c;
+
+ dev_dbg(&od->pdev->dev, "omap_device: activating\n");
+
+ while (od->pm_lat_level > 0) {
+ struct omap_device_pm_latency *odpl;
+ unsigned long long act_lat = 0;
+
+ od->pm_lat_level--;
+
+ odpl = od->pm_lats + od->pm_lat_level;
+
+ if (!ignore_lat &&
+ (od->dev_wakeup_lat <= od->_dev_wakeup_lat_limit))
+ break;
+
+ read_persistent_clock(&a);
+
+ /* XXX check return code */
+ odpl->activate_func(od);
+
+ read_persistent_clock(&b);
+
+ c = timespec_sub(b, a);
+ act_lat = timespec_to_ns(&c);
+
+ dev_dbg(&od->pdev->dev,
+ "omap_device: pm_lat %d: activate: elapsed time %llu nsec\n",
+ od->pm_lat_level, act_lat);
+
+ if (act_lat > odpl->activate_lat) {
+ odpl->activate_lat_worst = act_lat;
+ if (odpl->flags & OMAP_DEVICE_LATENCY_AUTO_ADJUST) {
+ odpl->activate_lat = act_lat;
+ dev_dbg(&od->pdev->dev,
+ "new worst case activate latency %d: %llu\n",
+ od->pm_lat_level, act_lat);
+ } else
+ dev_warn(&od->pdev->dev,
+ "activate latency %d higher than expected. (%llu > %d)\n",
+ od->pm_lat_level, act_lat,
+ odpl->activate_lat);
+ }
+
+ od->dev_wakeup_lat -= odpl->activate_lat;
+ }
+
+ return 0;
+}
+
+/**
+ * _omap_device_deactivate - decrease device readiness
+ * @od: struct omap_device *
+ * @ignore_lat: decrease to latency target (0) or full inactivity (1)?
+ *
+ * Decrease readiness of omap_device @od (thus increasing device
+ * wakeup latency, but conserving power). If @ignore_lat is
+ * IGNORE_WAKEUP_LAT, make the omap_device fully inactive. Otherwise,
+ * if @ignore_lat is USE_WAKEUP_LAT, and the device's maximum wakeup
+ * latency is less than the requested maximum wakeup latency, step
+ * forwards in the omap_device_pm_latency table to ensure the device's
+ * maximum wakeup latency is less than or equal to the requested
+ * maximum wakeup latency. Returns 0.
+ */
+static int _omap_device_deactivate(struct omap_device *od, u8 ignore_lat)
+{
+ struct timespec a, b, c;
+
+ dev_dbg(&od->pdev->dev, "omap_device: deactivating\n");
+
+ while (od->pm_lat_level < od->pm_lats_cnt) {
+ struct omap_device_pm_latency *odpl;
+ unsigned long long deact_lat = 0;
+
+ odpl = od->pm_lats + od->pm_lat_level;
+
+ if (!ignore_lat &&
+ ((od->dev_wakeup_lat + odpl->activate_lat) >
+ od->_dev_wakeup_lat_limit))
+ break;
+
+ read_persistent_clock(&a);
+
+ /* XXX check return code */
+ odpl->deactivate_func(od);
+
+ read_persistent_clock(&b);
+
+ c = timespec_sub(b, a);
+ deact_lat = timespec_to_ns(&c);
+
+ dev_dbg(&od->pdev->dev,
+ "omap_device: pm_lat %d: deactivate: elapsed time %llu nsec\n",
+ od->pm_lat_level, deact_lat);
+
+ if (deact_lat > odpl->deactivate_lat) {
+ odpl->deactivate_lat_worst = deact_lat;
+ if (odpl->flags & OMAP_DEVICE_LATENCY_AUTO_ADJUST) {
+ odpl->deactivate_lat = deact_lat;
+ dev_dbg(&od->pdev->dev,
+ "new worst case deactivate latency %d: %llu\n",
+ od->pm_lat_level, deact_lat);
+ } else
+ dev_warn(&od->pdev->dev,
+ "deactivate latency %d higher than expected. (%llu > %d)\n",
+ od->pm_lat_level, deact_lat,
+ odpl->deactivate_lat);
+ }
+
+ od->dev_wakeup_lat += odpl->activate_lat;
+
+ od->pm_lat_level++;
+ }
+
+ return 0;
+}
+
+static void _add_clkdev(struct omap_device *od, const char *clk_alias,
+ const char *clk_name)
+{
+ struct clk *r;
+ struct clk_lookup *l;
+
+ if (!clk_alias || !clk_name)
+ return;
+
+ dev_dbg(&od->pdev->dev, "Creating %s -> %s\n", clk_alias, clk_name);
+
+ r = clk_get_sys(dev_name(&od->pdev->dev), clk_alias);
+ if (!IS_ERR(r)) {
+ dev_warn(&od->pdev->dev,
+ "alias %s already exists\n", clk_alias);
+ clk_put(r);
+ return;
+ }
+
+ r = clk_get(NULL, clk_name);
+ if (IS_ERR(r)) {
+ dev_err(&od->pdev->dev,
+ "clk_get for %s failed\n", clk_name);
+ return;
+ }
+
+ l = clkdev_alloc(r, clk_alias, dev_name(&od->pdev->dev));
+ if (!l) {
+ dev_err(&od->pdev->dev,
+ "clkdev_alloc for %s failed\n", clk_alias);
+ return;
+ }
+
+ clkdev_add(l);
+}
+
+/**
+ * _add_hwmod_clocks_clkdev - Add clkdev entry for hwmod optional clocks
+ * and main clock
+ * @od: struct omap_device *od
+ * @oh: struct omap_hwmod *oh
+ *
+ * For the main clock and every optional clock present per hwmod per
+ * omap_device, this function adds an entry in the clkdev table of the
+ * form <dev-id=dev_name, con-id=role> if it does not exist already.
+ *
+ * The function is called from inside omap_device_build_ss(), after
+ * omap_device_register.
+ *
+ * This allows drivers to get a pointer to its optional clocks based on its role
+ * by calling clk_get(<dev*>, <role>).
+ * In the case of the main clock, a "fck" alias is used.
+ *
+ * No return value.
+ */
+static void _add_hwmod_clocks_clkdev(struct omap_device *od,
+ struct omap_hwmod *oh)
+{
+ int i;
+
+ _add_clkdev(od, "fck", oh->main_clk);
+
+ for (i = 0; i < oh->opt_clks_cnt; i++)
+ _add_clkdev(od, oh->opt_clks[i].role, oh->opt_clks[i].clk);
+}
+
+
+/**
+ * omap_device_build_from_dt - build an omap_device with multiple hwmods
+ * @pdev_name: name of the platform_device driver to use
+ * @pdev_id: this platform_device's connection ID
+ * @oh: ptr to the single omap_hwmod that backs this omap_device
+ * @pdata: platform_data ptr to associate with the platform_device
+ * @pdata_len: amount of memory pointed to by @pdata
+ * @pm_lats: pointer to a omap_device_pm_latency array for this device
+ * @pm_lats_cnt: ARRAY_SIZE() of @pm_lats
+ * @is_early_device: should the device be registered as an early device or not
+ *
+ * Function for building an omap_device already registered from device-tree
+ *
+ * Returns 0 or PTR_ERR() on error.
+ */
+static int omap_device_build_from_dt(struct platform_device *pdev)
+{
+ struct omap_hwmod **hwmods;
+ struct omap_device *od;
+ struct omap_hwmod *oh;
+ struct device_node *node = pdev->dev.of_node;
+ const char *oh_name;
+ int oh_cnt, i, ret = 0;
+
+ oh_cnt = of_property_count_strings(node, "ti,hwmods");
+ if (!oh_cnt || IS_ERR_VALUE(oh_cnt)) {
+ dev_dbg(&pdev->dev, "No 'hwmods' to build omap_device\n");
+ return -ENODEV;
+ }
+
+ hwmods = kzalloc(sizeof(struct omap_hwmod *) * oh_cnt, GFP_KERNEL);
+ if (!hwmods) {
+ ret = -ENOMEM;
+ goto odbfd_exit;
+ }
+
+ for (i = 0; i < oh_cnt; i++) {
+ of_property_read_string_index(node, "ti,hwmods", i, &oh_name);
+ oh = omap_hwmod_lookup(oh_name);
+ if (!oh) {
+ dev_err(&pdev->dev, "Cannot lookup hwmod '%s'\n",
+ oh_name);
+ ret = -EINVAL;
+ goto odbfd_exit1;
+ }
+ hwmods[i] = oh;
+ }
+
+ od = omap_device_alloc(pdev, hwmods, oh_cnt, NULL, 0);
+ if (!od) {
+ dev_err(&pdev->dev, "Cannot allocate omap_device for :%s\n",
+ oh_name);
+ ret = PTR_ERR(od);
+ goto odbfd_exit1;
+ }
+
+ /* Fix up missing resource names */
+ for (i = 0; i < pdev->num_resources; i++) {
+ struct resource *r = &pdev->resource[i];
+
+ if (r->name == NULL)
+ r->name = dev_name(&pdev->dev);
+ }
+
+ if (of_get_property(node, "ti,no_idle_on_suspend", NULL))
+ omap_device_disable_idle_on_suspend(pdev);
+
+ pdev->dev.pm_domain = &omap_device_pm_domain;
+
+odbfd_exit1:
+ kfree(hwmods);
+odbfd_exit:
+ return ret;
+}
+
+static int _omap_device_notifier_call(struct notifier_block *nb,
+ unsigned long event, void *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct omap_device *od;
+
+ switch (event) {
+ case BUS_NOTIFY_DEL_DEVICE:
+ if (pdev->archdata.od)
+ omap_device_delete(pdev->archdata.od);
+ break;
+ case BUS_NOTIFY_ADD_DEVICE:
+ if (pdev->dev.of_node)
+ omap_device_build_from_dt(pdev);
+ /* fall through */
+ default:
+ od = to_omap_device(pdev);
+ if (od)
+ od->_driver_status = event;
+ }
+
+ return NOTIFY_DONE;
+}
+
+
+/* Public functions for use by core code */
+
+/**
+ * omap_device_get_context_loss_count - get lost context count
+ * @od: struct omap_device *
+ *
+ * Using the primary hwmod, query the context loss count for this
+ * device.
+ *
+ * Callers should consider context for this device lost any time this
+ * function returns a value different than the value the caller got
+ * the last time it called this function.
+ *
+ * If any hwmods exist for the omap_device assoiated with @pdev,
+ * return the context loss counter for that hwmod, otherwise return
+ * zero.
+ */
+int omap_device_get_context_loss_count(struct platform_device *pdev)
+{
+ struct omap_device *od;
+ u32 ret = 0;
+
+ od = to_omap_device(pdev);
+
+ if (od->hwmods_cnt)
+ ret = omap_hwmod_get_context_loss_count(od->hwmods[0]);
+
+ return ret;
+}
+
+/**
+ * omap_device_count_resources - count number of struct resource entries needed
+ * @od: struct omap_device *
+ *
+ * Count the number of struct resource entries needed for this
+ * omap_device @od. Used by omap_device_build_ss() to determine how
+ * much memory to allocate before calling
+ * omap_device_fill_resources(). Returns the count.
+ */
+static int omap_device_count_resources(struct omap_device *od)
+{
+ int c = 0;
+ int i;
+
+ for (i = 0; i < od->hwmods_cnt; i++)
+ c += omap_hwmod_count_resources(od->hwmods[i]);
+
+ pr_debug("omap_device: %s: counted %d total resources across %d hwmods\n",
+ od->pdev->name, c, od->hwmods_cnt);
+
+ return c;
+}
+
+/**
+ * omap_device_fill_resources - fill in array of struct resource
+ * @od: struct omap_device *
+ * @res: pointer to an array of struct resource to be filled in
+ *
+ * Populate one or more empty struct resource pointed to by @res with
+ * the resource data for this omap_device @od. Used by
+ * omap_device_build_ss() after calling omap_device_count_resources().
+ * Ideally this function would not be needed at all. If omap_device
+ * replaces platform_device, then we can specify our own
+ * get_resource()/ get_irq()/etc functions that use the underlying
+ * omap_hwmod information. Or if platform_device is extended to use
+ * subarchitecture-specific function pointers, the various
+ * platform_device functions can simply call omap_device internal
+ * functions to get device resources. Hacking around the existing
+ * platform_device code wastes memory. Returns 0.
+ */
+static int omap_device_fill_resources(struct omap_device *od,
+ struct resource *res)
+{
+ int i, r;
+
+ for (i = 0; i < od->hwmods_cnt; i++) {
+ r = omap_hwmod_fill_resources(od->hwmods[i], res);
+ res += r;
+ }
+
+ return 0;
+}
+
+/**
+ * _od_fill_dma_resources - fill in array of struct resource with dma resources
+ * @od: struct omap_device *
+ * @res: pointer to an array of struct resource to be filled in
+ *
+ * Populate one or more empty struct resource pointed to by @res with
+ * the dma resource data for this omap_device @od. Used by
+ * omap_device_alloc() after calling omap_device_count_resources().
+ *
+ * Ideally this function would not be needed at all. If we have
+ * mechanism to get dma resources from DT.
+ *
+ * Returns 0.
+ */
+static int _od_fill_dma_resources(struct omap_device *od,
+ struct resource *res)
+{
+ int i, r;
+
+ for (i = 0; i < od->hwmods_cnt; i++) {
+ r = omap_hwmod_fill_dma_resources(od->hwmods[i], res);
+ res += r;
+ }
+
+ return 0;
+}
+
+/**
+ * omap_device_alloc - allocate an omap_device
+ * @pdev: platform_device that will be included in this omap_device
+ * @oh: ptr to the single omap_hwmod that backs this omap_device
+ * @pdata: platform_data ptr to associate with the platform_device
+ * @pdata_len: amount of memory pointed to by @pdata
+ * @pm_lats: pointer to a omap_device_pm_latency array for this device
+ * @pm_lats_cnt: ARRAY_SIZE() of @pm_lats
+ *
+ * Convenience function for allocating an omap_device structure and filling
+ * hwmods, resources and pm_latency attributes.
+ *
+ * Returns an struct omap_device pointer or ERR_PTR() on error;
+ */
+struct omap_device *omap_device_alloc(struct platform_device *pdev,
+ struct omap_hwmod **ohs, int oh_cnt,
+ struct omap_device_pm_latency *pm_lats,
+ int pm_lats_cnt)
+{
+ int ret = -ENOMEM;
+ struct omap_device *od;
+ struct resource *res = NULL;
+ int i, res_count;
+ struct omap_hwmod **hwmods;
+
+ od = kzalloc(sizeof(struct omap_device), GFP_KERNEL);
+ if (!od) {
+ ret = -ENOMEM;
+ goto oda_exit1;
+ }
+ od->hwmods_cnt = oh_cnt;
+
+ hwmods = kmemdup(ohs, sizeof(struct omap_hwmod *) * oh_cnt, GFP_KERNEL);
+ if (!hwmods)
+ goto oda_exit2;
+
+ od->hwmods = hwmods;
+ od->pdev = pdev;
+
+ res_count = omap_device_count_resources(od);
+ /*
+ * DT Boot:
+ * OF framework will construct the resource structure (currently
+ * does for MEM & IRQ resource) and we should respect/use these
+ * resources, killing hwmod dependency.
+ * If pdev->num_resources > 0, we assume that MEM & IRQ resources
+ * have been allocated by OF layer already (through DTB).
+ *
+ * Non-DT Boot:
+ * Here, pdev->num_resources = 0, and we should get all the
+ * resources from hwmod.
+ *
+ * TODO: Once DMA resource is available from OF layer, we should
+ * kill filling any resources from hwmod.
+ */
+ if (res_count > pdev->num_resources) {
+ /* Allocate resources memory to account for new resources */
+ res = kzalloc(sizeof(struct resource) * res_count, GFP_KERNEL);
+ if (!res)
+ goto oda_exit3;
+
+ /*
+ * If pdev->num_resources > 0, then assume that,
+ * MEM and IRQ resources will only come from DT and only
+ * fill DMA resource from hwmod layer.
+ */
+ if (pdev->num_resources && pdev->resource) {
+ dev_dbg(&pdev->dev, "%s(): resources already allocated %d\n",
+ __func__, res_count);
+ memcpy(res, pdev->resource,
+ sizeof(struct resource) * pdev->num_resources);
+ _od_fill_dma_resources(od, &res[pdev->num_resources]);
+ } else {
+ dev_dbg(&pdev->dev, "%s(): using resources from hwmod %d\n",
+ __func__, res_count);
+ omap_device_fill_resources(od, res);
+ }
+
+ ret = platform_device_add_resources(pdev, res, res_count);
+ kfree(res);
+
+ if (ret)
+ goto oda_exit3;
+ }
+
+ if (!pm_lats) {
+ pm_lats = omap_default_latency;
+ pm_lats_cnt = ARRAY_SIZE(omap_default_latency);
+ }
+
+ od->pm_lats_cnt = pm_lats_cnt;
+ od->pm_lats = kmemdup(pm_lats,
+ sizeof(struct omap_device_pm_latency) * pm_lats_cnt,
+ GFP_KERNEL);
+ if (!od->pm_lats)
+ goto oda_exit3;
+
+ pdev->archdata.od = od;
+
+ for (i = 0; i < oh_cnt; i++) {
+ hwmods[i]->od = od;
+ _add_hwmod_clocks_clkdev(od, hwmods[i]);
+ }
+
+ return od;
+
+oda_exit3:
+ kfree(hwmods);
+oda_exit2:
+ kfree(od);
+oda_exit1:
+ dev_err(&pdev->dev, "omap_device: build failed (%d)\n", ret);
+
+ return ERR_PTR(ret);
+}
+
+void omap_device_delete(struct omap_device *od)
+{
+ if (!od)
+ return;
+
+ od->pdev->archdata.od = NULL;
+ kfree(od->pm_lats);
+ kfree(od->hwmods);
+ kfree(od);
+}
+
+/**
+ * omap_device_build - build and register an omap_device with one omap_hwmod
+ * @pdev_name: name of the platform_device driver to use
+ * @pdev_id: this platform_device's connection ID
+ * @oh: ptr to the single omap_hwmod that backs this omap_device
+ * @pdata: platform_data ptr to associate with the platform_device
+ * @pdata_len: amount of memory pointed to by @pdata
+ * @pm_lats: pointer to a omap_device_pm_latency array for this device
+ * @pm_lats_cnt: ARRAY_SIZE() of @pm_lats
+ * @is_early_device: should the device be registered as an early device or not
+ *
+ * Convenience function for building and registering a single
+ * omap_device record, which in turn builds and registers a
+ * platform_device record. See omap_device_build_ss() for more
+ * information. Returns ERR_PTR(-EINVAL) if @oh is NULL; otherwise,
+ * passes along the return value of omap_device_build_ss().
+ */
+struct platform_device __init *omap_device_build(const char *pdev_name, int pdev_id,
+ struct omap_hwmod *oh, void *pdata,
+ int pdata_len,
+ struct omap_device_pm_latency *pm_lats,
+ int pm_lats_cnt, int is_early_device)
+{
+ struct omap_hwmod *ohs[] = { oh };
+
+ if (!oh)
+ return ERR_PTR(-EINVAL);
+
+ return omap_device_build_ss(pdev_name, pdev_id, ohs, 1, pdata,
+ pdata_len, pm_lats, pm_lats_cnt,
+ is_early_device);
+}
+
+/**
+ * omap_device_build_ss - build and register an omap_device with multiple hwmods
+ * @pdev_name: name of the platform_device driver to use
+ * @pdev_id: this platform_device's connection ID
+ * @oh: ptr to the single omap_hwmod that backs this omap_device
+ * @pdata: platform_data ptr to associate with the platform_device
+ * @pdata_len: amount of memory pointed to by @pdata
+ * @pm_lats: pointer to a omap_device_pm_latency array for this device
+ * @pm_lats_cnt: ARRAY_SIZE() of @pm_lats
+ * @is_early_device: should the device be registered as an early device or not
+ *
+ * Convenience function for building and registering an omap_device
+ * subsystem record. Subsystem records consist of multiple
+ * omap_hwmods. This function in turn builds and registers a
+ * platform_device record. Returns an ERR_PTR() on error, or passes
+ * along the return value of omap_device_register().
+ */
+struct platform_device __init *omap_device_build_ss(const char *pdev_name, int pdev_id,
+ struct omap_hwmod **ohs, int oh_cnt,
+ void *pdata, int pdata_len,
+ struct omap_device_pm_latency *pm_lats,
+ int pm_lats_cnt, int is_early_device)
+{
+ int ret = -ENOMEM;
+ struct platform_device *pdev;
+ struct omap_device *od;
+
+ if (!ohs || oh_cnt == 0 || !pdev_name)
+ return ERR_PTR(-EINVAL);
+
+ if (!pdata && pdata_len > 0)
+ return ERR_PTR(-EINVAL);
+
+ pdev = platform_device_alloc(pdev_name, pdev_id);
+ if (!pdev) {
+ ret = -ENOMEM;
+ goto odbs_exit;
+ }
+
+ /* Set the dev_name early to allow dev_xxx in omap_device_alloc */
+ if (pdev->id != -1)
+ dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id);
+ else
+ dev_set_name(&pdev->dev, "%s", pdev->name);
+
+ od = omap_device_alloc(pdev, ohs, oh_cnt, pm_lats, pm_lats_cnt);
+ if (IS_ERR(od))
+ goto odbs_exit1;
+
+ ret = platform_device_add_data(pdev, pdata, pdata_len);
+ if (ret)
+ goto odbs_exit2;
+
+ if (is_early_device)
+ ret = omap_early_device_register(pdev);
+ else
+ ret = omap_device_register(pdev);
+ if (ret)
+ goto odbs_exit2;
+
+ return pdev;
+
+odbs_exit2:
+ omap_device_delete(od);
+odbs_exit1:
+ platform_device_put(pdev);
+odbs_exit:
+
+ pr_err("omap_device: %s: build failed (%d)\n", pdev_name, ret);
+
+ return ERR_PTR(ret);
+}
+
+/**
+ * omap_early_device_register - register an omap_device as an early platform
+ * device.
+ * @od: struct omap_device * to register
+ *
+ * Register the omap_device structure. This currently just calls
+ * platform_early_add_device() on the underlying platform_device.
+ * Returns 0 by default.
+ */
+static int __init omap_early_device_register(struct platform_device *pdev)
+{
+ struct platform_device *devices[1];
+
+ devices[0] = pdev;
+ early_platform_add_devices(devices, 1);
+ return 0;
+}
+
+#ifdef CONFIG_PM_RUNTIME
+static int _od_runtime_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ int ret;
+
+ ret = pm_generic_runtime_suspend(dev);
+
+ if (!ret)
+ omap_device_idle(pdev);
+
+ return ret;
+}
+
+static int _od_runtime_idle(struct device *dev)
+{
+ return pm_generic_runtime_idle(dev);
+}
+
+static int _od_runtime_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+
+ omap_device_enable(pdev);
+
+ return pm_generic_runtime_resume(dev);
+}
+#endif
+
+#ifdef CONFIG_SUSPEND
+static int _od_suspend_noirq(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct omap_device *od = to_omap_device(pdev);
+ int ret;
+
+ /* Don't attempt late suspend on a driver that is not bound */
+ if (od->_driver_status != BUS_NOTIFY_BOUND_DRIVER)
+ return 0;
+
+ ret = pm_generic_suspend_noirq(dev);
+
+ if (!ret && !pm_runtime_status_suspended(dev)) {
+ if (pm_generic_runtime_suspend(dev) == 0) {
+ if (!(od->flags & OMAP_DEVICE_NO_IDLE_ON_SUSPEND))
+ omap_device_idle(pdev);
+ od->flags |= OMAP_DEVICE_SUSPENDED;
+ }
+ }
+
+ return ret;
+}
+
+static int _od_resume_noirq(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct omap_device *od = to_omap_device(pdev);
+
+ if ((od->flags & OMAP_DEVICE_SUSPENDED) &&
+ !pm_runtime_status_suspended(dev)) {
+ od->flags &= ~OMAP_DEVICE_SUSPENDED;
+ if (!(od->flags & OMAP_DEVICE_NO_IDLE_ON_SUSPEND))
+ omap_device_enable(pdev);
+ pm_generic_runtime_resume(dev);
+ }
+
+ return pm_generic_resume_noirq(dev);
+}
+#else
+#define _od_suspend_noirq NULL
+#define _od_resume_noirq NULL
+#endif
+
+struct dev_pm_domain omap_device_pm_domain = {
+ .ops = {
+ SET_RUNTIME_PM_OPS(_od_runtime_suspend, _od_runtime_resume,
+ _od_runtime_idle)
+ USE_PLATFORM_PM_SLEEP_OPS
+ .suspend_noirq = _od_suspend_noirq,
+ .resume_noirq = _od_resume_noirq,
+ }
+};
+
+/**
+ * omap_device_register - register an omap_device with one omap_hwmod
+ * @od: struct omap_device * to register
+ *
+ * Register the omap_device structure. This currently just calls
+ * platform_device_register() on the underlying platform_device.
+ * Returns the return value of platform_device_register().
+ */
+int omap_device_register(struct platform_device *pdev)
+{
+ pr_debug("omap_device: %s: registering\n", pdev->name);
+
+ pdev->dev.pm_domain = &omap_device_pm_domain;
+ return platform_device_add(pdev);
+}
+
+
+/* Public functions for use by device drivers through struct platform_data */
+
+/**
+ * omap_device_enable - fully activate an omap_device
+ * @od: struct omap_device * to activate
+ *
+ * Do whatever is necessary for the hwmods underlying omap_device @od
+ * to be accessible and ready to operate. This generally involves
+ * enabling clocks, setting SYSCONFIG registers; and in the future may
+ * involve remuxing pins. Device drivers should call this function
+ * (through platform_data function pointers) where they would normally
+ * enable clocks, etc. Returns -EINVAL if called when the omap_device
+ * is already enabled, or passes along the return value of
+ * _omap_device_activate().
+ */
+int omap_device_enable(struct platform_device *pdev)
+{
+ int ret;
+ struct omap_device *od;
+
+ od = to_omap_device(pdev);
+
+ if (od->_state == OMAP_DEVICE_STATE_ENABLED) {
+ dev_warn(&pdev->dev,
+ "omap_device: %s() called from invalid state %d\n",
+ __func__, od->_state);
+ return -EINVAL;
+ }
+
+ /* Enable everything if we're enabling this device from scratch */
+ if (od->_state == OMAP_DEVICE_STATE_UNKNOWN)
+ od->pm_lat_level = od->pm_lats_cnt;
+
+ ret = _omap_device_activate(od, IGNORE_WAKEUP_LAT);
+
+ od->dev_wakeup_lat = 0;
+ od->_dev_wakeup_lat_limit = UINT_MAX;
+ od->_state = OMAP_DEVICE_STATE_ENABLED;
+
+ return ret;
+}
+
+/**
+ * omap_device_idle - idle an omap_device
+ * @od: struct omap_device * to idle
+ *
+ * Idle omap_device @od by calling as many .deactivate_func() entries
+ * in the omap_device's pm_lats table as is possible without exceeding
+ * the device's maximum wakeup latency limit, pm_lat_limit. Device
+ * drivers should call this function (through platform_data function
+ * pointers) where they would normally disable clocks after operations
+ * complete, etc.. Returns -EINVAL if the omap_device is not
+ * currently enabled, or passes along the return value of
+ * _omap_device_deactivate().
+ */
+int omap_device_idle(struct platform_device *pdev)
+{
+ int ret;
+ struct omap_device *od;
+
+ od = to_omap_device(pdev);
+
+ if (od->_state != OMAP_DEVICE_STATE_ENABLED) {
+ dev_warn(&pdev->dev,
+ "omap_device: %s() called from invalid state %d\n",
+ __func__, od->_state);
+ return -EINVAL;
+ }
+
+ ret = _omap_device_deactivate(od, USE_WAKEUP_LAT);
+
+ od->_state = OMAP_DEVICE_STATE_IDLE;
+
+ return ret;
+}
+
+/**
+ * omap_device_shutdown - shut down an omap_device
+ * @od: struct omap_device * to shut down
+ *
+ * Shut down omap_device @od by calling all .deactivate_func() entries
+ * in the omap_device's pm_lats table and then shutting down all of
+ * the underlying omap_hwmods. Used when a device is being "removed"
+ * or a device driver is being unloaded. Returns -EINVAL if the
+ * omap_device is not currently enabled or idle, or passes along the
+ * return value of _omap_device_deactivate().
+ */
+int omap_device_shutdown(struct platform_device *pdev)
+{
+ int ret, i;
+ struct omap_device *od;
+
+ od = to_omap_device(pdev);
+
+ if (od->_state != OMAP_DEVICE_STATE_ENABLED &&
+ od->_state != OMAP_DEVICE_STATE_IDLE) {
+ dev_warn(&pdev->dev,
+ "omap_device: %s() called from invalid state %d\n",
+ __func__, od->_state);
+ return -EINVAL;
+ }
+
+ ret = _omap_device_deactivate(od, IGNORE_WAKEUP_LAT);
+
+ for (i = 0; i < od->hwmods_cnt; i++)
+ omap_hwmod_shutdown(od->hwmods[i]);
+
+ od->_state = OMAP_DEVICE_STATE_SHUTDOWN;
+
+ return ret;
+}
+
+/**
+ * omap_device_assert_hardreset - set a device's hardreset line
+ * @pdev: struct platform_device * to reset
+ * @name: const char * name of the reset line
+ *
+ * Set the hardreset line identified by @name on the IP blocks
+ * associated with the hwmods backing the platform_device @pdev. All
+ * of the hwmods associated with @pdev must have the same hardreset
+ * line linked to them for this to work. Passes along the return value
+ * of omap_hwmod_assert_hardreset() in the event of any failure, or
+ * returns 0 upon success.
+ */
+int omap_device_assert_hardreset(struct platform_device *pdev, const char *name)
+{
+ struct omap_device *od = to_omap_device(pdev);
+ int ret = 0;
+ int i;
+
+ for (i = 0; i < od->hwmods_cnt; i++) {
+ ret = omap_hwmod_assert_hardreset(od->hwmods[i], name);
+ if (ret)
+ break;
+ }
+
+ return ret;
+}
+
+/**
+ * omap_device_deassert_hardreset - release a device's hardreset line
+ * @pdev: struct platform_device * to reset
+ * @name: const char * name of the reset line
+ *
+ * Release the hardreset line identified by @name on the IP blocks
+ * associated with the hwmods backing the platform_device @pdev. All
+ * of the hwmods associated with @pdev must have the same hardreset
+ * line linked to them for this to work. Passes along the return
+ * value of omap_hwmod_deassert_hardreset() in the event of any
+ * failure, or returns 0 upon success.
+ */
+int omap_device_deassert_hardreset(struct platform_device *pdev,
+ const char *name)
+{
+ struct omap_device *od = to_omap_device(pdev);
+ int ret = 0;
+ int i;
+
+ for (i = 0; i < od->hwmods_cnt; i++) {
+ ret = omap_hwmod_deassert_hardreset(od->hwmods[i], name);
+ if (ret)
+ break;
+ }
+
+ return ret;
+}
+
+/**
+ * omap_device_align_pm_lat - activate/deactivate device to match wakeup lat lim
+ * @od: struct omap_device *
+ *
+ * When a device's maximum wakeup latency limit changes, call some of
+ * the .activate_func or .deactivate_func function pointers in the
+ * omap_device's pm_lats array to ensure that the device's maximum
+ * wakeup latency is less than or equal to the new latency limit.
+ * Intended to be called by OMAP PM code whenever a device's maximum
+ * wakeup latency limit changes (e.g., via
+ * omap_pm_set_dev_wakeup_lat()). Returns 0 if nothing needs to be
+ * done (e.g., if the omap_device is not currently idle, or if the
+ * wakeup latency is already current with the new limit) or passes
+ * along the return value of _omap_device_deactivate() or
+ * _omap_device_activate().
+ */
+int omap_device_align_pm_lat(struct platform_device *pdev,
+ u32 new_wakeup_lat_limit)
+{
+ int ret = -EINVAL;
+ struct omap_device *od;
+
+ od = to_omap_device(pdev);
+
+ if (new_wakeup_lat_limit == od->dev_wakeup_lat)
+ return 0;
+
+ od->_dev_wakeup_lat_limit = new_wakeup_lat_limit;
+
+ if (od->_state != OMAP_DEVICE_STATE_IDLE)
+ return 0;
+ else if (new_wakeup_lat_limit > od->dev_wakeup_lat)
+ ret = _omap_device_deactivate(od, USE_WAKEUP_LAT);
+ else if (new_wakeup_lat_limit < od->dev_wakeup_lat)
+ ret = _omap_device_activate(od, USE_WAKEUP_LAT);
+
+ return ret;
+}
+
+/**
+ * omap_device_get_pwrdm - return the powerdomain * associated with @od
+ * @od: struct omap_device *
+ *
+ * Return the powerdomain associated with the first underlying
+ * omap_hwmod for this omap_device. Intended for use by core OMAP PM
+ * code. Returns NULL on error or a struct powerdomain * upon
+ * success.
+ */
+struct powerdomain *omap_device_get_pwrdm(struct omap_device *od)
+{
+ /*
+ * XXX Assumes that all omap_hwmod powerdomains are identical.
+ * This may not necessarily be true. There should be a sanity
+ * check in here to WARN() if any difference appears.
+ */
+ if (!od->hwmods_cnt)
+ return NULL;
+
+ return omap_hwmod_get_pwrdm(od->hwmods[0]);
+}
+
+/**
+ * omap_device_get_mpu_rt_va - return the MPU's virtual addr for the hwmod base
+ * @od: struct omap_device *
+ *
+ * Return the MPU's virtual address for the base of the hwmod, from
+ * the ioremap() that the hwmod code does. Only valid if there is one
+ * hwmod associated with this device. Returns NULL if there are zero
+ * or more than one hwmods associated with this omap_device;
+ * otherwise, passes along the return value from
+ * omap_hwmod_get_mpu_rt_va().
+ */
+void __iomem *omap_device_get_rt_va(struct omap_device *od)
+{
+ if (od->hwmods_cnt != 1)
+ return NULL;
+
+ return omap_hwmod_get_mpu_rt_va(od->hwmods[0]);
+}
+
+/**
+ * omap_device_get_by_hwmod_name() - convert a hwmod name to
+ * device pointer.
+ * @oh_name: name of the hwmod device
+ *
+ * Returns back a struct device * pointer associated with a hwmod
+ * device represented by a hwmod_name
+ */
+struct device *omap_device_get_by_hwmod_name(const char *oh_name)
+{
+ struct omap_hwmod *oh;
+
+ if (!oh_name) {
+ WARN(1, "%s: no hwmod name!\n", __func__);
+ return ERR_PTR(-EINVAL);
+ }
+
+ oh = omap_hwmod_lookup(oh_name);
+ if (IS_ERR_OR_NULL(oh)) {
+ WARN(1, "%s: no hwmod for %s\n", __func__,
+ oh_name);
+ return ERR_PTR(oh ? PTR_ERR(oh) : -ENODEV);
+ }
+ if (IS_ERR_OR_NULL(oh->od)) {
+ WARN(1, "%s: no omap_device for %s\n", __func__,
+ oh_name);
+ return ERR_PTR(oh->od ? PTR_ERR(oh->od) : -ENODEV);
+ }
+
+ if (IS_ERR_OR_NULL(oh->od->pdev))
+ return ERR_PTR(oh->od->pdev ? PTR_ERR(oh->od->pdev) : -ENODEV);
+
+ return &oh->od->pdev->dev;
+}
+EXPORT_SYMBOL(omap_device_get_by_hwmod_name);
+
+/*
+ * Public functions intended for use in omap_device_pm_latency
+ * .activate_func and .deactivate_func function pointers
+ */
+
+/**
+ * omap_device_enable_hwmods - call omap_hwmod_enable() on all hwmods
+ * @od: struct omap_device *od
+ *
+ * Enable all underlying hwmods. Returns 0.
+ */
+int omap_device_enable_hwmods(struct omap_device *od)
+{
+ int i;
+
+ for (i = 0; i < od->hwmods_cnt; i++)
+ omap_hwmod_enable(od->hwmods[i]);
+
+ /* XXX pass along return value here? */
+ return 0;
+}
+
+/**
+ * omap_device_idle_hwmods - call omap_hwmod_idle() on all hwmods
+ * @od: struct omap_device *od
+ *
+ * Idle all underlying hwmods. Returns 0.
+ */
+int omap_device_idle_hwmods(struct omap_device *od)
+{
+ int i;
+
+ for (i = 0; i < od->hwmods_cnt; i++)
+ omap_hwmod_idle(od->hwmods[i]);
+
+ /* XXX pass along return value here? */
+ return 0;
+}
+
+/**
+ * omap_device_disable_clocks - disable all main and interface clocks
+ * @od: struct omap_device *od
+ *
+ * Disable the main functional clock and interface clock for all of the
+ * omap_hwmods associated with the omap_device. Returns 0.
+ */
+int omap_device_disable_clocks(struct omap_device *od)
+{
+ int i;
+
+ for (i = 0; i < od->hwmods_cnt; i++)
+ omap_hwmod_disable_clocks(od->hwmods[i]);
+
+ /* XXX pass along return value here? */
+ return 0;
+}
+
+/**
+ * omap_device_enable_clocks - enable all main and interface clocks
+ * @od: struct omap_device *od
+ *
+ * Enable the main functional clock and interface clock for all of the
+ * omap_hwmods associated with the omap_device. Returns 0.
+ */
+int omap_device_enable_clocks(struct omap_device *od)
+{
+ int i;
+
+ for (i = 0; i < od->hwmods_cnt; i++)
+ omap_hwmod_enable_clocks(od->hwmods[i]);
+
+ /* XXX pass along return value here? */
+ return 0;
+}
+
+static struct notifier_block platform_nb = {
+ .notifier_call = _omap_device_notifier_call,
+};
+
+static int __init omap_device_init(void)
+{
+ bus_register_notifier(&platform_bus_type, &platform_nb);
+ return 0;
+}
+core_initcall(omap_device_init);
+
+/**
+ * omap_device_late_idle - idle devices without drivers
+ * @dev: struct device * associated with omap_device
+ * @data: unused
+ *
+ * Check the driver bound status of this device, and idle it
+ * if there is no driver attached.
+ */
+static int __init omap_device_late_idle(struct device *dev, void *data)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct omap_device *od = to_omap_device(pdev);
+
+ if (!od)
+ return 0;
+
+ /*
+ * If omap_device state is enabled, but has no driver bound,
+ * idle it.
+ */
+ if (od->_driver_status != BUS_NOTIFY_BOUND_DRIVER) {
+ if (od->_state == OMAP_DEVICE_STATE_ENABLED) {
+ dev_warn(dev, "%s: enabled but no driver. Idling\n",
+ __func__);
+ omap_device_idle(pdev);
+ }
+ }
+
+ return 0;
+}
+
+static int __init omap_device_late_init(void)
+{
+ bus_for_each_dev(&platform_bus_type, NULL, NULL, omap_device_late_idle);
+ return 0;
+}
+late_initcall(omap_device_late_init);
--- /dev/null
+/*
+ * omap_device headers
+ *
+ * Copyright (C) 2009 Nokia Corporation
+ * Paul Walmsley
+ *
+ * Developed in collaboration with (alphabetical order): Benoit
+ * Cousson, Kevin Hilman, Tony Lindgren, Rajendra Nayak, Vikram
+ * Pandita, Sakari Poussa, Anand Sawant, Santosh Shilimkar, Richard
+ * Woodruff
+ *
+ * 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.
+ *
+ * Eventually this type of functionality should either be
+ * a) implemented via arch-specific pointers in platform_device
+ * or
+ * b) implemented as a proper omap_bus/omap_device in Linux, no more
+ * platform_device
+ *
+ * omap_device differs from omap_hwmod in that it includes external
+ * (e.g., board- and system-level) integration details. omap_hwmod
+ * stores hardware data that is invariant for a given OMAP chip.
+ *
+ * To do:
+ * - GPIO integration
+ * - regulator integration
+ *
+ */
+#ifndef __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_OMAP_DEVICE_H
+#define __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_OMAP_DEVICE_H
+
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+
+#include <plat/omap_hwmod.h>
+
+extern struct dev_pm_domain omap_device_pm_domain;
+
+/* omap_device._state values */
+#define OMAP_DEVICE_STATE_UNKNOWN 0
+#define OMAP_DEVICE_STATE_ENABLED 1
+#define OMAP_DEVICE_STATE_IDLE 2
+#define OMAP_DEVICE_STATE_SHUTDOWN 3
+
+/* omap_device.flags values */
+#define OMAP_DEVICE_SUSPENDED BIT(0)
+#define OMAP_DEVICE_NO_IDLE_ON_SUSPEND BIT(1)
+
+/**
+ * struct omap_device - omap_device wrapper for platform_devices
+ * @pdev: platform_device
+ * @hwmods: (one .. many per omap_device)
+ * @hwmods_cnt: ARRAY_SIZE() of @hwmods
+ * @pm_lats: ptr to an omap_device_pm_latency table
+ * @pm_lats_cnt: ARRAY_SIZE() of what is passed to @pm_lats
+ * @pm_lat_level: array index of the last odpl entry executed - -1 if never
+ * @dev_wakeup_lat: dev wakeup latency in nanoseconds
+ * @_dev_wakeup_lat_limit: dev wakeup latency limit in nsec - set by OMAP PM
+ * @_state: one of OMAP_DEVICE_STATE_* (see above)
+ * @flags: device flags
+ * @_driver_status: one of BUS_NOTIFY_*_DRIVER from <linux/device.h>
+ *
+ * Integrates omap_hwmod data into Linux platform_device.
+ *
+ * Field names beginning with underscores are for the internal use of
+ * the omap_device code.
+ *
+ */
+struct omap_device {
+ struct platform_device *pdev;
+ struct omap_hwmod **hwmods;
+ struct omap_device_pm_latency *pm_lats;
+ u32 dev_wakeup_lat;
+ u32 _dev_wakeup_lat_limit;
+ unsigned long _driver_status;
+ u8 pm_lats_cnt;
+ s8 pm_lat_level;
+ u8 hwmods_cnt;
+ u8 _state;
+ u8 flags;
+};
+
+/* Device driver interface (call via platform_data fn ptrs) */
+
+int omap_device_enable(struct platform_device *pdev);
+int omap_device_idle(struct platform_device *pdev);
+int omap_device_shutdown(struct platform_device *pdev);
+
+/* Core code interface */
+
+struct platform_device *omap_device_build(const char *pdev_name, int pdev_id,
+ struct omap_hwmod *oh, void *pdata,
+ int pdata_len,
+ struct omap_device_pm_latency *pm_lats,
+ int pm_lats_cnt, int is_early_device);
+
+struct platform_device *omap_device_build_ss(const char *pdev_name, int pdev_id,
+ struct omap_hwmod **oh, int oh_cnt,
+ void *pdata, int pdata_len,
+ struct omap_device_pm_latency *pm_lats,
+ int pm_lats_cnt, int is_early_device);
+
+struct omap_device *omap_device_alloc(struct platform_device *pdev,
+ struct omap_hwmod **ohs, int oh_cnt,
+ struct omap_device_pm_latency *pm_lats,
+ int pm_lats_cnt);
+void omap_device_delete(struct omap_device *od);
+int omap_device_register(struct platform_device *pdev);
+
+void __iomem *omap_device_get_rt_va(struct omap_device *od);
+struct device *omap_device_get_by_hwmod_name(const char *oh_name);
+
+/* OMAP PM interface */
+int omap_device_align_pm_lat(struct platform_device *pdev,
+ u32 new_wakeup_lat_limit);
+struct powerdomain *omap_device_get_pwrdm(struct omap_device *od);
+int omap_device_get_context_loss_count(struct platform_device *pdev);
+
+/* Other */
+
+int omap_device_assert_hardreset(struct platform_device *pdev,
+ const char *name);
+int omap_device_deassert_hardreset(struct platform_device *pdev,
+ const char *name);
+int omap_device_idle_hwmods(struct omap_device *od);
+int omap_device_enable_hwmods(struct omap_device *od);
+
+int omap_device_disable_clocks(struct omap_device *od);
+int omap_device_enable_clocks(struct omap_device *od);
+
+/*
+ * Entries should be kept in latency order ascending
+ *
+ * deact_lat is the maximum number of microseconds required to complete
+ * deactivate_func() at the device's slowest OPP.
+ *
+ * act_lat is the maximum number of microseconds required to complete
+ * activate_func() at the device's slowest OPP.
+ *
+ * This will result in some suboptimal power management decisions at fast
+ * OPPs, but avoids having to recompute all device power management decisions
+ * if the system shifts from a fast OPP to a slow OPP (in order to meet
+ * latency requirements).
+ *
+ * XXX should deactivate_func/activate_func() take platform_device pointers
+ * rather than omap_device pointers?
+ */
+struct omap_device_pm_latency {
+ u32 deactivate_lat;
+ u32 deactivate_lat_worst;
+ int (*deactivate_func)(struct omap_device *od);
+ u32 activate_lat;
+ u32 activate_lat_worst;
+ int (*activate_func)(struct omap_device *od);
+ u32 flags;
+};
+
+#define OMAP_DEVICE_LATENCY_AUTO_ADJUST BIT(1)
+
+/* Get omap_device pointer from platform_device pointer */
+static inline struct omap_device *to_omap_device(struct platform_device *pdev)
+{
+ return pdev ? pdev->archdata.od : NULL;
+}
+
+static inline
+void omap_device_disable_idle_on_suspend(struct platform_device *pdev)
+{
+ struct omap_device *od = to_omap_device(pdev);
+
+ od->flags |= OMAP_DEVICE_NO_IDLE_ON_SUSPEND;
+}
+
+#endif
#include <linux/opp.h>
#include <linux/cpu.h>
-#include <plat/omap_device.h>
+#include "omap_device.h"
#include "omap_opp_data.h"
#include <asm/system_misc.h>
#include <plat/omap-pm.h>
-#include <plat/omap_device.h>
+#include "omap_device.h"
#include "common.h"
#include "prcm-common.h"
#include <asm/pmu.h>
#include <plat/omap_hwmod.h>
-#include <plat/omap_device.h>
+#include "omap_device.h"
static char *omap2_pmu_oh_names[] = {"mpu"};
static char *omap3_pmu_oh_names[] = {"mpu", "debugss"};
#include "common.h"
#include <plat-omap/dma-omap.h>
#include <plat/omap_hwmod.h>
-#include <plat/omap_device.h>
+#include "omap_device.h"
#include <plat/omap-pm.h>
#include <plat/serial.h>
#include <linux/slab.h>
#include <linux/io.h>
-#include <plat/omap_device.h>
+#include "omap_device.h"
#include "voltage.h"
#include "control.h"
#include <asm/arch_timer.h>
#include <plat/omap_hwmod.h>
-#include <plat/omap_device.h>
+#include "omap_device.h"
#include <plat/dmtimer.h>
#include <plat/omap-pm.h>
#include <asm/io.h>
#include <plat/usb.h>
-#include <plat/omap_device.h>
+#include "omap_device.h"
#include "mux.h"
#include <linux/usb/musb.h>
#include <plat/usb.h>
-#include <plat/omap_device.h>
+#include "omap_device.h"
#include "am35xx.h"
obj- :=
# omap_device support (OMAP2+ only at the moment)
-obj-$(CONFIG_ARCH_OMAP2PLUS) += omap_device.o
obj-$(CONFIG_OMAP_DM_TIMER) += dmtimer.o
obj-$(CONFIG_OMAP_DEBUG_DEVICES) += debug-devices.o
+++ /dev/null
-/*
- * omap_device headers
- *
- * Copyright (C) 2009 Nokia Corporation
- * Paul Walmsley
- *
- * Developed in collaboration with (alphabetical order): Benoit
- * Cousson, Kevin Hilman, Tony Lindgren, Rajendra Nayak, Vikram
- * Pandita, Sakari Poussa, Anand Sawant, Santosh Shilimkar, Richard
- * Woodruff
- *
- * 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.
- *
- * Eventually this type of functionality should either be
- * a) implemented via arch-specific pointers in platform_device
- * or
- * b) implemented as a proper omap_bus/omap_device in Linux, no more
- * platform_device
- *
- * omap_device differs from omap_hwmod in that it includes external
- * (e.g., board- and system-level) integration details. omap_hwmod
- * stores hardware data that is invariant for a given OMAP chip.
- *
- * To do:
- * - GPIO integration
- * - regulator integration
- *
- */
-#ifndef __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_OMAP_DEVICE_H
-#define __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_OMAP_DEVICE_H
-
-#include <linux/kernel.h>
-#include <linux/platform_device.h>
-
-#include <plat/omap_hwmod.h>
-
-extern struct dev_pm_domain omap_device_pm_domain;
-
-/* omap_device._state values */
-#define OMAP_DEVICE_STATE_UNKNOWN 0
-#define OMAP_DEVICE_STATE_ENABLED 1
-#define OMAP_DEVICE_STATE_IDLE 2
-#define OMAP_DEVICE_STATE_SHUTDOWN 3
-
-/* omap_device.flags values */
-#define OMAP_DEVICE_SUSPENDED BIT(0)
-#define OMAP_DEVICE_NO_IDLE_ON_SUSPEND BIT(1)
-
-/**
- * struct omap_device - omap_device wrapper for platform_devices
- * @pdev: platform_device
- * @hwmods: (one .. many per omap_device)
- * @hwmods_cnt: ARRAY_SIZE() of @hwmods
- * @pm_lats: ptr to an omap_device_pm_latency table
- * @pm_lats_cnt: ARRAY_SIZE() of what is passed to @pm_lats
- * @pm_lat_level: array index of the last odpl entry executed - -1 if never
- * @dev_wakeup_lat: dev wakeup latency in nanoseconds
- * @_dev_wakeup_lat_limit: dev wakeup latency limit in nsec - set by OMAP PM
- * @_state: one of OMAP_DEVICE_STATE_* (see above)
- * @flags: device flags
- * @_driver_status: one of BUS_NOTIFY_*_DRIVER from <linux/device.h>
- *
- * Integrates omap_hwmod data into Linux platform_device.
- *
- * Field names beginning with underscores are for the internal use of
- * the omap_device code.
- *
- */
-struct omap_device {
- struct platform_device *pdev;
- struct omap_hwmod **hwmods;
- struct omap_device_pm_latency *pm_lats;
- u32 dev_wakeup_lat;
- u32 _dev_wakeup_lat_limit;
- unsigned long _driver_status;
- u8 pm_lats_cnt;
- s8 pm_lat_level;
- u8 hwmods_cnt;
- u8 _state;
- u8 flags;
-};
-
-/* Device driver interface (call via platform_data fn ptrs) */
-
-int omap_device_enable(struct platform_device *pdev);
-int omap_device_idle(struct platform_device *pdev);
-int omap_device_shutdown(struct platform_device *pdev);
-
-/* Core code interface */
-
-struct platform_device *omap_device_build(const char *pdev_name, int pdev_id,
- struct omap_hwmod *oh, void *pdata,
- int pdata_len,
- struct omap_device_pm_latency *pm_lats,
- int pm_lats_cnt, int is_early_device);
-
-struct platform_device *omap_device_build_ss(const char *pdev_name, int pdev_id,
- struct omap_hwmod **oh, int oh_cnt,
- void *pdata, int pdata_len,
- struct omap_device_pm_latency *pm_lats,
- int pm_lats_cnt, int is_early_device);
-
-struct omap_device *omap_device_alloc(struct platform_device *pdev,
- struct omap_hwmod **ohs, int oh_cnt,
- struct omap_device_pm_latency *pm_lats,
- int pm_lats_cnt);
-void omap_device_delete(struct omap_device *od);
-int omap_device_register(struct platform_device *pdev);
-
-void __iomem *omap_device_get_rt_va(struct omap_device *od);
-struct device *omap_device_get_by_hwmod_name(const char *oh_name);
-
-/* OMAP PM interface */
-int omap_device_align_pm_lat(struct platform_device *pdev,
- u32 new_wakeup_lat_limit);
-struct powerdomain *omap_device_get_pwrdm(struct omap_device *od);
-int omap_device_get_context_loss_count(struct platform_device *pdev);
-
-/* Other */
-
-int omap_device_assert_hardreset(struct platform_device *pdev,
- const char *name);
-int omap_device_deassert_hardreset(struct platform_device *pdev,
- const char *name);
-int omap_device_idle_hwmods(struct omap_device *od);
-int omap_device_enable_hwmods(struct omap_device *od);
-
-int omap_device_disable_clocks(struct omap_device *od);
-int omap_device_enable_clocks(struct omap_device *od);
-
-/*
- * Entries should be kept in latency order ascending
- *
- * deact_lat is the maximum number of microseconds required to complete
- * deactivate_func() at the device's slowest OPP.
- *
- * act_lat is the maximum number of microseconds required to complete
- * activate_func() at the device's slowest OPP.
- *
- * This will result in some suboptimal power management decisions at fast
- * OPPs, but avoids having to recompute all device power management decisions
- * if the system shifts from a fast OPP to a slow OPP (in order to meet
- * latency requirements).
- *
- * XXX should deactivate_func/activate_func() take platform_device pointers
- * rather than omap_device pointers?
- */
-struct omap_device_pm_latency {
- u32 deactivate_lat;
- u32 deactivate_lat_worst;
- int (*deactivate_func)(struct omap_device *od);
- u32 activate_lat;
- u32 activate_lat_worst;
- int (*activate_func)(struct omap_device *od);
- u32 flags;
-};
-
-#define OMAP_DEVICE_LATENCY_AUTO_ADJUST BIT(1)
-
-/* Get omap_device pointer from platform_device pointer */
-static inline struct omap_device *to_omap_device(struct platform_device *pdev)
-{
- return pdev ? pdev->archdata.od : NULL;
-}
-
-static inline
-void omap_device_disable_idle_on_suspend(struct platform_device *pdev)
-{
- struct omap_device *od = to_omap_device(pdev);
-
- od->flags |= OMAP_DEVICE_NO_IDLE_ON_SUSPEND;
-}
-
-#endif
/* Interface documentation is in mach/omap-pm.h */
#include <plat/omap-pm.h>
-#include <plat/omap_device.h>
+
+#include "../mach-omap2/omap_device.h"
static bool off_mode_enabled;
static int dummy_context_loss_counter;
+++ /dev/null
-/*
- * omap_device implementation
- *
- * Copyright (C) 2009-2010 Nokia Corporation
- * Paul Walmsley, Kevin Hilman
- *
- * Developed in collaboration with (alphabetical order): Benoit
- * Cousson, Thara Gopinath, Tony Lindgren, Rajendra Nayak, Vikram
- * Pandita, Sakari Poussa, Anand Sawant, Santosh Shilimkar, Richard
- * Woodruff
- *
- * 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 code provides a consistent interface for OMAP device drivers
- * to control power management and interconnect properties of their
- * devices.
- *
- * In the medium- to long-term, this code should either be
- * a) implemented via arch-specific pointers in platform_data
- * or
- * b) implemented as a proper omap_bus/omap_device in Linux, no more
- * platform_data func pointers
- *
- *
- * Guidelines for usage by driver authors:
- *
- * 1. These functions are intended to be used by device drivers via
- * function pointers in struct platform_data. As an example,
- * omap_device_enable() should be passed to the driver as
- *
- * struct foo_driver_platform_data {
- * ...
- * int (*device_enable)(struct platform_device *pdev);
- * ...
- * }
- *
- * Note that the generic "device_enable" name is used, rather than
- * "omap_device_enable". This is so other architectures can pass in their
- * own enable/disable functions here.
- *
- * This should be populated during device setup:
- *
- * ...
- * pdata->device_enable = omap_device_enable;
- * ...
- *
- * 2. Drivers should first check to ensure the function pointer is not null
- * before calling it, as in:
- *
- * if (pdata->device_enable)
- * pdata->device_enable(pdev);
- *
- * This allows other architectures that don't use similar device_enable()/
- * device_shutdown() functions to execute normally.
- *
- * ...
- *
- * Suggested usage by device drivers:
- *
- * During device initialization:
- * device_enable()
- *
- * During device idle:
- * (save remaining device context if necessary)
- * device_idle();
- *
- * During device resume:
- * device_enable();
- * (restore context if necessary)
- *
- * During device shutdown:
- * device_shutdown()
- * (device must be reinitialized at this point to use it again)
- *
- */
-#undef DEBUG
-
-#include <linux/kernel.h>
-#include <linux/export.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/clk.h>
-#include <linux/clkdev.h>
-#include <linux/pm_runtime.h>
-#include <linux/of.h>
-#include <linux/notifier.h>
-
-#include <plat/omap_device.h>
-#include <plat/omap_hwmod.h>
-#include <plat/clock.h>
-
-/* These parameters are passed to _omap_device_{de,}activate() */
-#define USE_WAKEUP_LAT 0
-#define IGNORE_WAKEUP_LAT 1
-
-static int omap_early_device_register(struct platform_device *pdev);
-
-static struct omap_device_pm_latency omap_default_latency[] = {
- {
- .deactivate_func = omap_device_idle_hwmods,
- .activate_func = omap_device_enable_hwmods,
- .flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
- }
-};
-
-/* Private functions */
-
-/**
- * _omap_device_activate - increase device readiness
- * @od: struct omap_device *
- * @ignore_lat: increase to latency target (0) or full readiness (1)?
- *
- * Increase readiness of omap_device @od (thus decreasing device
- * wakeup latency, but consuming more power). If @ignore_lat is
- * IGNORE_WAKEUP_LAT, make the omap_device fully active. Otherwise,
- * if @ignore_lat is USE_WAKEUP_LAT, and the device's maximum wakeup
- * latency is greater than the requested maximum wakeup latency, step
- * backwards in the omap_device_pm_latency table to ensure the
- * device's maximum wakeup latency is less than or equal to the
- * requested maximum wakeup latency. Returns 0.
- */
-static int _omap_device_activate(struct omap_device *od, u8 ignore_lat)
-{
- struct timespec a, b, c;
-
- dev_dbg(&od->pdev->dev, "omap_device: activating\n");
-
- while (od->pm_lat_level > 0) {
- struct omap_device_pm_latency *odpl;
- unsigned long long act_lat = 0;
-
- od->pm_lat_level--;
-
- odpl = od->pm_lats + od->pm_lat_level;
-
- if (!ignore_lat &&
- (od->dev_wakeup_lat <= od->_dev_wakeup_lat_limit))
- break;
-
- read_persistent_clock(&a);
-
- /* XXX check return code */
- odpl->activate_func(od);
-
- read_persistent_clock(&b);
-
- c = timespec_sub(b, a);
- act_lat = timespec_to_ns(&c);
-
- dev_dbg(&od->pdev->dev,
- "omap_device: pm_lat %d: activate: elapsed time %llu nsec\n",
- od->pm_lat_level, act_lat);
-
- if (act_lat > odpl->activate_lat) {
- odpl->activate_lat_worst = act_lat;
- if (odpl->flags & OMAP_DEVICE_LATENCY_AUTO_ADJUST) {
- odpl->activate_lat = act_lat;
- dev_dbg(&od->pdev->dev,
- "new worst case activate latency %d: %llu\n",
- od->pm_lat_level, act_lat);
- } else
- dev_warn(&od->pdev->dev,
- "activate latency %d higher than expected. (%llu > %d)\n",
- od->pm_lat_level, act_lat,
- odpl->activate_lat);
- }
-
- od->dev_wakeup_lat -= odpl->activate_lat;
- }
-
- return 0;
-}
-
-/**
- * _omap_device_deactivate - decrease device readiness
- * @od: struct omap_device *
- * @ignore_lat: decrease to latency target (0) or full inactivity (1)?
- *
- * Decrease readiness of omap_device @od (thus increasing device
- * wakeup latency, but conserving power). If @ignore_lat is
- * IGNORE_WAKEUP_LAT, make the omap_device fully inactive. Otherwise,
- * if @ignore_lat is USE_WAKEUP_LAT, and the device's maximum wakeup
- * latency is less than the requested maximum wakeup latency, step
- * forwards in the omap_device_pm_latency table to ensure the device's
- * maximum wakeup latency is less than or equal to the requested
- * maximum wakeup latency. Returns 0.
- */
-static int _omap_device_deactivate(struct omap_device *od, u8 ignore_lat)
-{
- struct timespec a, b, c;
-
- dev_dbg(&od->pdev->dev, "omap_device: deactivating\n");
-
- while (od->pm_lat_level < od->pm_lats_cnt) {
- struct omap_device_pm_latency *odpl;
- unsigned long long deact_lat = 0;
-
- odpl = od->pm_lats + od->pm_lat_level;
-
- if (!ignore_lat &&
- ((od->dev_wakeup_lat + odpl->activate_lat) >
- od->_dev_wakeup_lat_limit))
- break;
-
- read_persistent_clock(&a);
-
- /* XXX check return code */
- odpl->deactivate_func(od);
-
- read_persistent_clock(&b);
-
- c = timespec_sub(b, a);
- deact_lat = timespec_to_ns(&c);
-
- dev_dbg(&od->pdev->dev,
- "omap_device: pm_lat %d: deactivate: elapsed time %llu nsec\n",
- od->pm_lat_level, deact_lat);
-
- if (deact_lat > odpl->deactivate_lat) {
- odpl->deactivate_lat_worst = deact_lat;
- if (odpl->flags & OMAP_DEVICE_LATENCY_AUTO_ADJUST) {
- odpl->deactivate_lat = deact_lat;
- dev_dbg(&od->pdev->dev,
- "new worst case deactivate latency %d: %llu\n",
- od->pm_lat_level, deact_lat);
- } else
- dev_warn(&od->pdev->dev,
- "deactivate latency %d higher than expected. (%llu > %d)\n",
- od->pm_lat_level, deact_lat,
- odpl->deactivate_lat);
- }
-
- od->dev_wakeup_lat += odpl->activate_lat;
-
- od->pm_lat_level++;
- }
-
- return 0;
-}
-
-static void _add_clkdev(struct omap_device *od, const char *clk_alias,
- const char *clk_name)
-{
- struct clk *r;
- struct clk_lookup *l;
-
- if (!clk_alias || !clk_name)
- return;
-
- dev_dbg(&od->pdev->dev, "Creating %s -> %s\n", clk_alias, clk_name);
-
- r = clk_get_sys(dev_name(&od->pdev->dev), clk_alias);
- if (!IS_ERR(r)) {
- dev_warn(&od->pdev->dev,
- "alias %s already exists\n", clk_alias);
- clk_put(r);
- return;
- }
-
- r = clk_get(NULL, clk_name);
- if (IS_ERR(r)) {
- dev_err(&od->pdev->dev,
- "clk_get for %s failed\n", clk_name);
- return;
- }
-
- l = clkdev_alloc(r, clk_alias, dev_name(&od->pdev->dev));
- if (!l) {
- dev_err(&od->pdev->dev,
- "clkdev_alloc for %s failed\n", clk_alias);
- return;
- }
-
- clkdev_add(l);
-}
-
-/**
- * _add_hwmod_clocks_clkdev - Add clkdev entry for hwmod optional clocks
- * and main clock
- * @od: struct omap_device *od
- * @oh: struct omap_hwmod *oh
- *
- * For the main clock and every optional clock present per hwmod per
- * omap_device, this function adds an entry in the clkdev table of the
- * form <dev-id=dev_name, con-id=role> if it does not exist already.
- *
- * The function is called from inside omap_device_build_ss(), after
- * omap_device_register.
- *
- * This allows drivers to get a pointer to its optional clocks based on its role
- * by calling clk_get(<dev*>, <role>).
- * In the case of the main clock, a "fck" alias is used.
- *
- * No return value.
- */
-static void _add_hwmod_clocks_clkdev(struct omap_device *od,
- struct omap_hwmod *oh)
-{
- int i;
-
- _add_clkdev(od, "fck", oh->main_clk);
-
- for (i = 0; i < oh->opt_clks_cnt; i++)
- _add_clkdev(od, oh->opt_clks[i].role, oh->opt_clks[i].clk);
-}
-
-
-/**
- * omap_device_build_from_dt - build an omap_device with multiple hwmods
- * @pdev_name: name of the platform_device driver to use
- * @pdev_id: this platform_device's connection ID
- * @oh: ptr to the single omap_hwmod that backs this omap_device
- * @pdata: platform_data ptr to associate with the platform_device
- * @pdata_len: amount of memory pointed to by @pdata
- * @pm_lats: pointer to a omap_device_pm_latency array for this device
- * @pm_lats_cnt: ARRAY_SIZE() of @pm_lats
- * @is_early_device: should the device be registered as an early device or not
- *
- * Function for building an omap_device already registered from device-tree
- *
- * Returns 0 or PTR_ERR() on error.
- */
-static int omap_device_build_from_dt(struct platform_device *pdev)
-{
- struct omap_hwmod **hwmods;
- struct omap_device *od;
- struct omap_hwmod *oh;
- struct device_node *node = pdev->dev.of_node;
- const char *oh_name;
- int oh_cnt, i, ret = 0;
-
- oh_cnt = of_property_count_strings(node, "ti,hwmods");
- if (!oh_cnt || IS_ERR_VALUE(oh_cnt)) {
- dev_dbg(&pdev->dev, "No 'hwmods' to build omap_device\n");
- return -ENODEV;
- }
-
- hwmods = kzalloc(sizeof(struct omap_hwmod *) * oh_cnt, GFP_KERNEL);
- if (!hwmods) {
- ret = -ENOMEM;
- goto odbfd_exit;
- }
-
- for (i = 0; i < oh_cnt; i++) {
- of_property_read_string_index(node, "ti,hwmods", i, &oh_name);
- oh = omap_hwmod_lookup(oh_name);
- if (!oh) {
- dev_err(&pdev->dev, "Cannot lookup hwmod '%s'\n",
- oh_name);
- ret = -EINVAL;
- goto odbfd_exit1;
- }
- hwmods[i] = oh;
- }
-
- od = omap_device_alloc(pdev, hwmods, oh_cnt, NULL, 0);
- if (!od) {
- dev_err(&pdev->dev, "Cannot allocate omap_device for :%s\n",
- oh_name);
- ret = PTR_ERR(od);
- goto odbfd_exit1;
- }
-
- /* Fix up missing resource names */
- for (i = 0; i < pdev->num_resources; i++) {
- struct resource *r = &pdev->resource[i];
-
- if (r->name == NULL)
- r->name = dev_name(&pdev->dev);
- }
-
- if (of_get_property(node, "ti,no_idle_on_suspend", NULL))
- omap_device_disable_idle_on_suspend(pdev);
-
- pdev->dev.pm_domain = &omap_device_pm_domain;
-
-odbfd_exit1:
- kfree(hwmods);
-odbfd_exit:
- return ret;
-}
-
-static int _omap_device_notifier_call(struct notifier_block *nb,
- unsigned long event, void *dev)
-{
- struct platform_device *pdev = to_platform_device(dev);
- struct omap_device *od;
-
- switch (event) {
- case BUS_NOTIFY_DEL_DEVICE:
- if (pdev->archdata.od)
- omap_device_delete(pdev->archdata.od);
- break;
- case BUS_NOTIFY_ADD_DEVICE:
- if (pdev->dev.of_node)
- omap_device_build_from_dt(pdev);
- /* fall through */
- default:
- od = to_omap_device(pdev);
- if (od)
- od->_driver_status = event;
- }
-
- return NOTIFY_DONE;
-}
-
-
-/* Public functions for use by core code */
-
-/**
- * omap_device_get_context_loss_count - get lost context count
- * @od: struct omap_device *
- *
- * Using the primary hwmod, query the context loss count for this
- * device.
- *
- * Callers should consider context for this device lost any time this
- * function returns a value different than the value the caller got
- * the last time it called this function.
- *
- * If any hwmods exist for the omap_device assoiated with @pdev,
- * return the context loss counter for that hwmod, otherwise return
- * zero.
- */
-int omap_device_get_context_loss_count(struct platform_device *pdev)
-{
- struct omap_device *od;
- u32 ret = 0;
-
- od = to_omap_device(pdev);
-
- if (od->hwmods_cnt)
- ret = omap_hwmod_get_context_loss_count(od->hwmods[0]);
-
- return ret;
-}
-
-/**
- * omap_device_count_resources - count number of struct resource entries needed
- * @od: struct omap_device *
- *
- * Count the number of struct resource entries needed for this
- * omap_device @od. Used by omap_device_build_ss() to determine how
- * much memory to allocate before calling
- * omap_device_fill_resources(). Returns the count.
- */
-static int omap_device_count_resources(struct omap_device *od)
-{
- int c = 0;
- int i;
-
- for (i = 0; i < od->hwmods_cnt; i++)
- c += omap_hwmod_count_resources(od->hwmods[i]);
-
- pr_debug("omap_device: %s: counted %d total resources across %d hwmods\n",
- od->pdev->name, c, od->hwmods_cnt);
-
- return c;
-}
-
-/**
- * omap_device_fill_resources - fill in array of struct resource
- * @od: struct omap_device *
- * @res: pointer to an array of struct resource to be filled in
- *
- * Populate one or more empty struct resource pointed to by @res with
- * the resource data for this omap_device @od. Used by
- * omap_device_build_ss() after calling omap_device_count_resources().
- * Ideally this function would not be needed at all. If omap_device
- * replaces platform_device, then we can specify our own
- * get_resource()/ get_irq()/etc functions that use the underlying
- * omap_hwmod information. Or if platform_device is extended to use
- * subarchitecture-specific function pointers, the various
- * platform_device functions can simply call omap_device internal
- * functions to get device resources. Hacking around the existing
- * platform_device code wastes memory. Returns 0.
- */
-static int omap_device_fill_resources(struct omap_device *od,
- struct resource *res)
-{
- int i, r;
-
- for (i = 0; i < od->hwmods_cnt; i++) {
- r = omap_hwmod_fill_resources(od->hwmods[i], res);
- res += r;
- }
-
- return 0;
-}
-
-/**
- * _od_fill_dma_resources - fill in array of struct resource with dma resources
- * @od: struct omap_device *
- * @res: pointer to an array of struct resource to be filled in
- *
- * Populate one or more empty struct resource pointed to by @res with
- * the dma resource data for this omap_device @od. Used by
- * omap_device_alloc() after calling omap_device_count_resources().
- *
- * Ideally this function would not be needed at all. If we have
- * mechanism to get dma resources from DT.
- *
- * Returns 0.
- */
-static int _od_fill_dma_resources(struct omap_device *od,
- struct resource *res)
-{
- int i, r;
-
- for (i = 0; i < od->hwmods_cnt; i++) {
- r = omap_hwmod_fill_dma_resources(od->hwmods[i], res);
- res += r;
- }
-
- return 0;
-}
-
-/**
- * omap_device_alloc - allocate an omap_device
- * @pdev: platform_device that will be included in this omap_device
- * @oh: ptr to the single omap_hwmod that backs this omap_device
- * @pdata: platform_data ptr to associate with the platform_device
- * @pdata_len: amount of memory pointed to by @pdata
- * @pm_lats: pointer to a omap_device_pm_latency array for this device
- * @pm_lats_cnt: ARRAY_SIZE() of @pm_lats
- *
- * Convenience function for allocating an omap_device structure and filling
- * hwmods, resources and pm_latency attributes.
- *
- * Returns an struct omap_device pointer or ERR_PTR() on error;
- */
-struct omap_device *omap_device_alloc(struct platform_device *pdev,
- struct omap_hwmod **ohs, int oh_cnt,
- struct omap_device_pm_latency *pm_lats,
- int pm_lats_cnt)
-{
- int ret = -ENOMEM;
- struct omap_device *od;
- struct resource *res = NULL;
- int i, res_count;
- struct omap_hwmod **hwmods;
-
- od = kzalloc(sizeof(struct omap_device), GFP_KERNEL);
- if (!od) {
- ret = -ENOMEM;
- goto oda_exit1;
- }
- od->hwmods_cnt = oh_cnt;
-
- hwmods = kmemdup(ohs, sizeof(struct omap_hwmod *) * oh_cnt, GFP_KERNEL);
- if (!hwmods)
- goto oda_exit2;
-
- od->hwmods = hwmods;
- od->pdev = pdev;
-
- res_count = omap_device_count_resources(od);
- /*
- * DT Boot:
- * OF framework will construct the resource structure (currently
- * does for MEM & IRQ resource) and we should respect/use these
- * resources, killing hwmod dependency.
- * If pdev->num_resources > 0, we assume that MEM & IRQ resources
- * have been allocated by OF layer already (through DTB).
- *
- * Non-DT Boot:
- * Here, pdev->num_resources = 0, and we should get all the
- * resources from hwmod.
- *
- * TODO: Once DMA resource is available from OF layer, we should
- * kill filling any resources from hwmod.
- */
- if (res_count > pdev->num_resources) {
- /* Allocate resources memory to account for new resources */
- res = kzalloc(sizeof(struct resource) * res_count, GFP_KERNEL);
- if (!res)
- goto oda_exit3;
-
- /*
- * If pdev->num_resources > 0, then assume that,
- * MEM and IRQ resources will only come from DT and only
- * fill DMA resource from hwmod layer.
- */
- if (pdev->num_resources && pdev->resource) {
- dev_dbg(&pdev->dev, "%s(): resources already allocated %d\n",
- __func__, res_count);
- memcpy(res, pdev->resource,
- sizeof(struct resource) * pdev->num_resources);
- _od_fill_dma_resources(od, &res[pdev->num_resources]);
- } else {
- dev_dbg(&pdev->dev, "%s(): using resources from hwmod %d\n",
- __func__, res_count);
- omap_device_fill_resources(od, res);
- }
-
- ret = platform_device_add_resources(pdev, res, res_count);
- kfree(res);
-
- if (ret)
- goto oda_exit3;
- }
-
- if (!pm_lats) {
- pm_lats = omap_default_latency;
- pm_lats_cnt = ARRAY_SIZE(omap_default_latency);
- }
-
- od->pm_lats_cnt = pm_lats_cnt;
- od->pm_lats = kmemdup(pm_lats,
- sizeof(struct omap_device_pm_latency) * pm_lats_cnt,
- GFP_KERNEL);
- if (!od->pm_lats)
- goto oda_exit3;
-
- pdev->archdata.od = od;
-
- for (i = 0; i < oh_cnt; i++) {
- hwmods[i]->od = od;
- _add_hwmod_clocks_clkdev(od, hwmods[i]);
- }
-
- return od;
-
-oda_exit3:
- kfree(hwmods);
-oda_exit2:
- kfree(od);
-oda_exit1:
- dev_err(&pdev->dev, "omap_device: build failed (%d)\n", ret);
-
- return ERR_PTR(ret);
-}
-
-void omap_device_delete(struct omap_device *od)
-{
- if (!od)
- return;
-
- od->pdev->archdata.od = NULL;
- kfree(od->pm_lats);
- kfree(od->hwmods);
- kfree(od);
-}
-
-/**
- * omap_device_build - build and register an omap_device with one omap_hwmod
- * @pdev_name: name of the platform_device driver to use
- * @pdev_id: this platform_device's connection ID
- * @oh: ptr to the single omap_hwmod that backs this omap_device
- * @pdata: platform_data ptr to associate with the platform_device
- * @pdata_len: amount of memory pointed to by @pdata
- * @pm_lats: pointer to a omap_device_pm_latency array for this device
- * @pm_lats_cnt: ARRAY_SIZE() of @pm_lats
- * @is_early_device: should the device be registered as an early device or not
- *
- * Convenience function for building and registering a single
- * omap_device record, which in turn builds and registers a
- * platform_device record. See omap_device_build_ss() for more
- * information. Returns ERR_PTR(-EINVAL) if @oh is NULL; otherwise,
- * passes along the return value of omap_device_build_ss().
- */
-struct platform_device __init *omap_device_build(const char *pdev_name, int pdev_id,
- struct omap_hwmod *oh, void *pdata,
- int pdata_len,
- struct omap_device_pm_latency *pm_lats,
- int pm_lats_cnt, int is_early_device)
-{
- struct omap_hwmod *ohs[] = { oh };
-
- if (!oh)
- return ERR_PTR(-EINVAL);
-
- return omap_device_build_ss(pdev_name, pdev_id, ohs, 1, pdata,
- pdata_len, pm_lats, pm_lats_cnt,
- is_early_device);
-}
-
-/**
- * omap_device_build_ss - build and register an omap_device with multiple hwmods
- * @pdev_name: name of the platform_device driver to use
- * @pdev_id: this platform_device's connection ID
- * @oh: ptr to the single omap_hwmod that backs this omap_device
- * @pdata: platform_data ptr to associate with the platform_device
- * @pdata_len: amount of memory pointed to by @pdata
- * @pm_lats: pointer to a omap_device_pm_latency array for this device
- * @pm_lats_cnt: ARRAY_SIZE() of @pm_lats
- * @is_early_device: should the device be registered as an early device or not
- *
- * Convenience function for building and registering an omap_device
- * subsystem record. Subsystem records consist of multiple
- * omap_hwmods. This function in turn builds and registers a
- * platform_device record. Returns an ERR_PTR() on error, or passes
- * along the return value of omap_device_register().
- */
-struct platform_device __init *omap_device_build_ss(const char *pdev_name, int pdev_id,
- struct omap_hwmod **ohs, int oh_cnt,
- void *pdata, int pdata_len,
- struct omap_device_pm_latency *pm_lats,
- int pm_lats_cnt, int is_early_device)
-{
- int ret = -ENOMEM;
- struct platform_device *pdev;
- struct omap_device *od;
-
- if (!ohs || oh_cnt == 0 || !pdev_name)
- return ERR_PTR(-EINVAL);
-
- if (!pdata && pdata_len > 0)
- return ERR_PTR(-EINVAL);
-
- pdev = platform_device_alloc(pdev_name, pdev_id);
- if (!pdev) {
- ret = -ENOMEM;
- goto odbs_exit;
- }
-
- /* Set the dev_name early to allow dev_xxx in omap_device_alloc */
- if (pdev->id != -1)
- dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id);
- else
- dev_set_name(&pdev->dev, "%s", pdev->name);
-
- od = omap_device_alloc(pdev, ohs, oh_cnt, pm_lats, pm_lats_cnt);
- if (IS_ERR(od))
- goto odbs_exit1;
-
- ret = platform_device_add_data(pdev, pdata, pdata_len);
- if (ret)
- goto odbs_exit2;
-
- if (is_early_device)
- ret = omap_early_device_register(pdev);
- else
- ret = omap_device_register(pdev);
- if (ret)
- goto odbs_exit2;
-
- return pdev;
-
-odbs_exit2:
- omap_device_delete(od);
-odbs_exit1:
- platform_device_put(pdev);
-odbs_exit:
-
- pr_err("omap_device: %s: build failed (%d)\n", pdev_name, ret);
-
- return ERR_PTR(ret);
-}
-
-/**
- * omap_early_device_register - register an omap_device as an early platform
- * device.
- * @od: struct omap_device * to register
- *
- * Register the omap_device structure. This currently just calls
- * platform_early_add_device() on the underlying platform_device.
- * Returns 0 by default.
- */
-static int __init omap_early_device_register(struct platform_device *pdev)
-{
- struct platform_device *devices[1];
-
- devices[0] = pdev;
- early_platform_add_devices(devices, 1);
- return 0;
-}
-
-#ifdef CONFIG_PM_RUNTIME
-static int _od_runtime_suspend(struct device *dev)
-{
- struct platform_device *pdev = to_platform_device(dev);
- int ret;
-
- ret = pm_generic_runtime_suspend(dev);
-
- if (!ret)
- omap_device_idle(pdev);
-
- return ret;
-}
-
-static int _od_runtime_idle(struct device *dev)
-{
- return pm_generic_runtime_idle(dev);
-}
-
-static int _od_runtime_resume(struct device *dev)
-{
- struct platform_device *pdev = to_platform_device(dev);
-
- omap_device_enable(pdev);
-
- return pm_generic_runtime_resume(dev);
-}
-#endif
-
-#ifdef CONFIG_SUSPEND
-static int _od_suspend_noirq(struct device *dev)
-{
- struct platform_device *pdev = to_platform_device(dev);
- struct omap_device *od = to_omap_device(pdev);
- int ret;
-
- /* Don't attempt late suspend on a driver that is not bound */
- if (od->_driver_status != BUS_NOTIFY_BOUND_DRIVER)
- return 0;
-
- ret = pm_generic_suspend_noirq(dev);
-
- if (!ret && !pm_runtime_status_suspended(dev)) {
- if (pm_generic_runtime_suspend(dev) == 0) {
- if (!(od->flags & OMAP_DEVICE_NO_IDLE_ON_SUSPEND))
- omap_device_idle(pdev);
- od->flags |= OMAP_DEVICE_SUSPENDED;
- }
- }
-
- return ret;
-}
-
-static int _od_resume_noirq(struct device *dev)
-{
- struct platform_device *pdev = to_platform_device(dev);
- struct omap_device *od = to_omap_device(pdev);
-
- if ((od->flags & OMAP_DEVICE_SUSPENDED) &&
- !pm_runtime_status_suspended(dev)) {
- od->flags &= ~OMAP_DEVICE_SUSPENDED;
- if (!(od->flags & OMAP_DEVICE_NO_IDLE_ON_SUSPEND))
- omap_device_enable(pdev);
- pm_generic_runtime_resume(dev);
- }
-
- return pm_generic_resume_noirq(dev);
-}
-#else
-#define _od_suspend_noirq NULL
-#define _od_resume_noirq NULL
-#endif
-
-struct dev_pm_domain omap_device_pm_domain = {
- .ops = {
- SET_RUNTIME_PM_OPS(_od_runtime_suspend, _od_runtime_resume,
- _od_runtime_idle)
- USE_PLATFORM_PM_SLEEP_OPS
- .suspend_noirq = _od_suspend_noirq,
- .resume_noirq = _od_resume_noirq,
- }
-};
-
-/**
- * omap_device_register - register an omap_device with one omap_hwmod
- * @od: struct omap_device * to register
- *
- * Register the omap_device structure. This currently just calls
- * platform_device_register() on the underlying platform_device.
- * Returns the return value of platform_device_register().
- */
-int omap_device_register(struct platform_device *pdev)
-{
- pr_debug("omap_device: %s: registering\n", pdev->name);
-
- pdev->dev.pm_domain = &omap_device_pm_domain;
- return platform_device_add(pdev);
-}
-
-
-/* Public functions for use by device drivers through struct platform_data */
-
-/**
- * omap_device_enable - fully activate an omap_device
- * @od: struct omap_device * to activate
- *
- * Do whatever is necessary for the hwmods underlying omap_device @od
- * to be accessible and ready to operate. This generally involves
- * enabling clocks, setting SYSCONFIG registers; and in the future may
- * involve remuxing pins. Device drivers should call this function
- * (through platform_data function pointers) where they would normally
- * enable clocks, etc. Returns -EINVAL if called when the omap_device
- * is already enabled, or passes along the return value of
- * _omap_device_activate().
- */
-int omap_device_enable(struct platform_device *pdev)
-{
- int ret;
- struct omap_device *od;
-
- od = to_omap_device(pdev);
-
- if (od->_state == OMAP_DEVICE_STATE_ENABLED) {
- dev_warn(&pdev->dev,
- "omap_device: %s() called from invalid state %d\n",
- __func__, od->_state);
- return -EINVAL;
- }
-
- /* Enable everything if we're enabling this device from scratch */
- if (od->_state == OMAP_DEVICE_STATE_UNKNOWN)
- od->pm_lat_level = od->pm_lats_cnt;
-
- ret = _omap_device_activate(od, IGNORE_WAKEUP_LAT);
-
- od->dev_wakeup_lat = 0;
- od->_dev_wakeup_lat_limit = UINT_MAX;
- od->_state = OMAP_DEVICE_STATE_ENABLED;
-
- return ret;
-}
-
-/**
- * omap_device_idle - idle an omap_device
- * @od: struct omap_device * to idle
- *
- * Idle omap_device @od by calling as many .deactivate_func() entries
- * in the omap_device's pm_lats table as is possible without exceeding
- * the device's maximum wakeup latency limit, pm_lat_limit. Device
- * drivers should call this function (through platform_data function
- * pointers) where they would normally disable clocks after operations
- * complete, etc.. Returns -EINVAL if the omap_device is not
- * currently enabled, or passes along the return value of
- * _omap_device_deactivate().
- */
-int omap_device_idle(struct platform_device *pdev)
-{
- int ret;
- struct omap_device *od;
-
- od = to_omap_device(pdev);
-
- if (od->_state != OMAP_DEVICE_STATE_ENABLED) {
- dev_warn(&pdev->dev,
- "omap_device: %s() called from invalid state %d\n",
- __func__, od->_state);
- return -EINVAL;
- }
-
- ret = _omap_device_deactivate(od, USE_WAKEUP_LAT);
-
- od->_state = OMAP_DEVICE_STATE_IDLE;
-
- return ret;
-}
-
-/**
- * omap_device_shutdown - shut down an omap_device
- * @od: struct omap_device * to shut down
- *
- * Shut down omap_device @od by calling all .deactivate_func() entries
- * in the omap_device's pm_lats table and then shutting down all of
- * the underlying omap_hwmods. Used when a device is being "removed"
- * or a device driver is being unloaded. Returns -EINVAL if the
- * omap_device is not currently enabled or idle, or passes along the
- * return value of _omap_device_deactivate().
- */
-int omap_device_shutdown(struct platform_device *pdev)
-{
- int ret, i;
- struct omap_device *od;
-
- od = to_omap_device(pdev);
-
- if (od->_state != OMAP_DEVICE_STATE_ENABLED &&
- od->_state != OMAP_DEVICE_STATE_IDLE) {
- dev_warn(&pdev->dev,
- "omap_device: %s() called from invalid state %d\n",
- __func__, od->_state);
- return -EINVAL;
- }
-
- ret = _omap_device_deactivate(od, IGNORE_WAKEUP_LAT);
-
- for (i = 0; i < od->hwmods_cnt; i++)
- omap_hwmod_shutdown(od->hwmods[i]);
-
- od->_state = OMAP_DEVICE_STATE_SHUTDOWN;
-
- return ret;
-}
-
-/**
- * omap_device_assert_hardreset - set a device's hardreset line
- * @pdev: struct platform_device * to reset
- * @name: const char * name of the reset line
- *
- * Set the hardreset line identified by @name on the IP blocks
- * associated with the hwmods backing the platform_device @pdev. All
- * of the hwmods associated with @pdev must have the same hardreset
- * line linked to them for this to work. Passes along the return value
- * of omap_hwmod_assert_hardreset() in the event of any failure, or
- * returns 0 upon success.
- */
-int omap_device_assert_hardreset(struct platform_device *pdev, const char *name)
-{
- struct omap_device *od = to_omap_device(pdev);
- int ret = 0;
- int i;
-
- for (i = 0; i < od->hwmods_cnt; i++) {
- ret = omap_hwmod_assert_hardreset(od->hwmods[i], name);
- if (ret)
- break;
- }
-
- return ret;
-}
-
-/**
- * omap_device_deassert_hardreset - release a device's hardreset line
- * @pdev: struct platform_device * to reset
- * @name: const char * name of the reset line
- *
- * Release the hardreset line identified by @name on the IP blocks
- * associated with the hwmods backing the platform_device @pdev. All
- * of the hwmods associated with @pdev must have the same hardreset
- * line linked to them for this to work. Passes along the return
- * value of omap_hwmod_deassert_hardreset() in the event of any
- * failure, or returns 0 upon success.
- */
-int omap_device_deassert_hardreset(struct platform_device *pdev,
- const char *name)
-{
- struct omap_device *od = to_omap_device(pdev);
- int ret = 0;
- int i;
-
- for (i = 0; i < od->hwmods_cnt; i++) {
- ret = omap_hwmod_deassert_hardreset(od->hwmods[i], name);
- if (ret)
- break;
- }
-
- return ret;
-}
-
-/**
- * omap_device_align_pm_lat - activate/deactivate device to match wakeup lat lim
- * @od: struct omap_device *
- *
- * When a device's maximum wakeup latency limit changes, call some of
- * the .activate_func or .deactivate_func function pointers in the
- * omap_device's pm_lats array to ensure that the device's maximum
- * wakeup latency is less than or equal to the new latency limit.
- * Intended to be called by OMAP PM code whenever a device's maximum
- * wakeup latency limit changes (e.g., via
- * omap_pm_set_dev_wakeup_lat()). Returns 0 if nothing needs to be
- * done (e.g., if the omap_device is not currently idle, or if the
- * wakeup latency is already current with the new limit) or passes
- * along the return value of _omap_device_deactivate() or
- * _omap_device_activate().
- */
-int omap_device_align_pm_lat(struct platform_device *pdev,
- u32 new_wakeup_lat_limit)
-{
- int ret = -EINVAL;
- struct omap_device *od;
-
- od = to_omap_device(pdev);
-
- if (new_wakeup_lat_limit == od->dev_wakeup_lat)
- return 0;
-
- od->_dev_wakeup_lat_limit = new_wakeup_lat_limit;
-
- if (od->_state != OMAP_DEVICE_STATE_IDLE)
- return 0;
- else if (new_wakeup_lat_limit > od->dev_wakeup_lat)
- ret = _omap_device_deactivate(od, USE_WAKEUP_LAT);
- else if (new_wakeup_lat_limit < od->dev_wakeup_lat)
- ret = _omap_device_activate(od, USE_WAKEUP_LAT);
-
- return ret;
-}
-
-/**
- * omap_device_get_pwrdm - return the powerdomain * associated with @od
- * @od: struct omap_device *
- *
- * Return the powerdomain associated with the first underlying
- * omap_hwmod for this omap_device. Intended for use by core OMAP PM
- * code. Returns NULL on error or a struct powerdomain * upon
- * success.
- */
-struct powerdomain *omap_device_get_pwrdm(struct omap_device *od)
-{
- /*
- * XXX Assumes that all omap_hwmod powerdomains are identical.
- * This may not necessarily be true. There should be a sanity
- * check in here to WARN() if any difference appears.
- */
- if (!od->hwmods_cnt)
- return NULL;
-
- return omap_hwmod_get_pwrdm(od->hwmods[0]);
-}
-
-/**
- * omap_device_get_mpu_rt_va - return the MPU's virtual addr for the hwmod base
- * @od: struct omap_device *
- *
- * Return the MPU's virtual address for the base of the hwmod, from
- * the ioremap() that the hwmod code does. Only valid if there is one
- * hwmod associated with this device. Returns NULL if there are zero
- * or more than one hwmods associated with this omap_device;
- * otherwise, passes along the return value from
- * omap_hwmod_get_mpu_rt_va().
- */
-void __iomem *omap_device_get_rt_va(struct omap_device *od)
-{
- if (od->hwmods_cnt != 1)
- return NULL;
-
- return omap_hwmod_get_mpu_rt_va(od->hwmods[0]);
-}
-
-/**
- * omap_device_get_by_hwmod_name() - convert a hwmod name to
- * device pointer.
- * @oh_name: name of the hwmod device
- *
- * Returns back a struct device * pointer associated with a hwmod
- * device represented by a hwmod_name
- */
-struct device *omap_device_get_by_hwmod_name(const char *oh_name)
-{
- struct omap_hwmod *oh;
-
- if (!oh_name) {
- WARN(1, "%s: no hwmod name!\n", __func__);
- return ERR_PTR(-EINVAL);
- }
-
- oh = omap_hwmod_lookup(oh_name);
- if (IS_ERR_OR_NULL(oh)) {
- WARN(1, "%s: no hwmod for %s\n", __func__,
- oh_name);
- return ERR_PTR(oh ? PTR_ERR(oh) : -ENODEV);
- }
- if (IS_ERR_OR_NULL(oh->od)) {
- WARN(1, "%s: no omap_device for %s\n", __func__,
- oh_name);
- return ERR_PTR(oh->od ? PTR_ERR(oh->od) : -ENODEV);
- }
-
- if (IS_ERR_OR_NULL(oh->od->pdev))
- return ERR_PTR(oh->od->pdev ? PTR_ERR(oh->od->pdev) : -ENODEV);
-
- return &oh->od->pdev->dev;
-}
-EXPORT_SYMBOL(omap_device_get_by_hwmod_name);
-
-/*
- * Public functions intended for use in omap_device_pm_latency
- * .activate_func and .deactivate_func function pointers
- */
-
-/**
- * omap_device_enable_hwmods - call omap_hwmod_enable() on all hwmods
- * @od: struct omap_device *od
- *
- * Enable all underlying hwmods. Returns 0.
- */
-int omap_device_enable_hwmods(struct omap_device *od)
-{
- int i;
-
- for (i = 0; i < od->hwmods_cnt; i++)
- omap_hwmod_enable(od->hwmods[i]);
-
- /* XXX pass along return value here? */
- return 0;
-}
-
-/**
- * omap_device_idle_hwmods - call omap_hwmod_idle() on all hwmods
- * @od: struct omap_device *od
- *
- * Idle all underlying hwmods. Returns 0.
- */
-int omap_device_idle_hwmods(struct omap_device *od)
-{
- int i;
-
- for (i = 0; i < od->hwmods_cnt; i++)
- omap_hwmod_idle(od->hwmods[i]);
-
- /* XXX pass along return value here? */
- return 0;
-}
-
-/**
- * omap_device_disable_clocks - disable all main and interface clocks
- * @od: struct omap_device *od
- *
- * Disable the main functional clock and interface clock for all of the
- * omap_hwmods associated with the omap_device. Returns 0.
- */
-int omap_device_disable_clocks(struct omap_device *od)
-{
- int i;
-
- for (i = 0; i < od->hwmods_cnt; i++)
- omap_hwmod_disable_clocks(od->hwmods[i]);
-
- /* XXX pass along return value here? */
- return 0;
-}
-
-/**
- * omap_device_enable_clocks - enable all main and interface clocks
- * @od: struct omap_device *od
- *
- * Enable the main functional clock and interface clock for all of the
- * omap_hwmods associated with the omap_device. Returns 0.
- */
-int omap_device_enable_clocks(struct omap_device *od)
-{
- int i;
-
- for (i = 0; i < od->hwmods_cnt; i++)
- omap_hwmod_enable_clocks(od->hwmods[i]);
-
- /* XXX pass along return value here? */
- return 0;
-}
-
-static struct notifier_block platform_nb = {
- .notifier_call = _omap_device_notifier_call,
-};
-
-static int __init omap_device_init(void)
-{
- bus_register_notifier(&platform_bus_type, &platform_nb);
- return 0;
-}
-core_initcall(omap_device_init);
-
-/**
- * omap_device_late_idle - idle devices without drivers
- * @dev: struct device * associated with omap_device
- * @data: unused
- *
- * Check the driver bound status of this device, and idle it
- * if there is no driver attached.
- */
-static int __init omap_device_late_idle(struct device *dev, void *data)
-{
- struct platform_device *pdev = to_platform_device(dev);
- struct omap_device *od = to_omap_device(pdev);
-
- if (!od)
- return 0;
-
- /*
- * If omap_device state is enabled, but has no driver bound,
- * idle it.
- */
- if (od->_driver_status != BUS_NOTIFY_BOUND_DRIVER) {
- if (od->_state == OMAP_DEVICE_STATE_ENABLED) {
- dev_warn(dev, "%s: enabled but no driver. Idling\n",
- __func__);
- omap_device_idle(pdev);
- }
- }
-
- return 0;
-}
-
-static int __init omap_device_late_init(void)
-{
- bus_for_each_dev(&platform_bus_type, NULL, NULL, omap_device_late_idle);
- return 0;
-}
-late_initcall(omap_device_late_init);
projects / firefly-linux-kernel-4.4.55.git / commitdiff