#include <trace/events/regulator.h>
#include "dummy.h"
+#include "internal.h"
#define rdev_crit(rdev, fmt, ...) \
pr_crit("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__)
unsigned int ena_gpio_invert:1;
};
-/*
- * struct regulator
- *
- * One for each consumer device.
- */
-struct regulator {
- struct device *dev;
- struct list_head list;
- unsigned int always_on:1;
- unsigned int bypass:1;
- int uA_load;
- int min_uV;
- int max_uV;
- char *supply_name;
- struct device_attribute dev_attr;
- struct regulator_dev *rdev;
- struct dentry *debugfs;
-};
-
static int _regulator_is_enabled(struct regulator_dev *rdev);
static int _regulator_disable(struct regulator_dev *rdev);
static int _regulator_get_voltage(struct regulator_dev *rdev);
static int _regulator_get_current_limit(struct regulator_dev *rdev);
static unsigned int _regulator_get_mode(struct regulator_dev *rdev);
-static void _notifier_call_chain(struct regulator_dev *rdev,
+static int _notifier_call_chain(struct regulator_dev *rdev,
unsigned long event, void *data);
static int _regulator_do_set_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV);
regulator_put(*(struct regulator **)res);
}
-/**
- * devm_regulator_get - Resource managed regulator_get()
- * @dev: device for regulator "consumer"
- * @id: Supply name or regulator ID.
- *
- * Managed regulator_get(). Regulators returned from this function are
- * automatically regulator_put() on driver detach. See regulator_get() for more
- * information.
- */
-struct regulator *devm_regulator_get(struct device *dev, const char *id)
-{
- struct regulator **ptr, *regulator;
-
- ptr = devres_alloc(devm_regulator_release, sizeof(*ptr), GFP_KERNEL);
- if (!ptr)
- return ERR_PTR(-ENOMEM);
-
- regulator = regulator_get(dev, id);
- if (!IS_ERR(regulator)) {
- *ptr = regulator;
- devres_add(dev, ptr);
- } else {
- devres_free(ptr);
- }
-
- return regulator;
-}
-EXPORT_SYMBOL_GPL(devm_regulator_get);
-
/**
* regulator_get_exclusive - obtain exclusive access to a regulator.
* @dev: device for regulator "consumer"
}
EXPORT_SYMBOL_GPL(regulator_get_exclusive);
-/* Locks held by regulator_put() */
+/**
+ * regulator_get_optional - obtain optional access to a regulator.
+ * @dev: device for regulator "consumer"
+ * @id: Supply name or regulator ID.
+ *
+ * Returns a struct regulator corresponding to the regulator producer,
+ * or IS_ERR() condition containing errno. Other consumers will be
+ * unable to obtain this reference is held and the use count for the
+ * regulator will be initialised to reflect the current state of the
+ * regulator.
+ *
+ * This is intended for use by consumers for devices which can have
+ * some supplies unconnected in normal use, such as some MMC devices.
+ * It can allow the regulator core to provide stub supplies for other
+ * supplies requested using normal regulator_get() calls without
+ * disrupting the operation of drivers that can handle absent
+ * supplies.
+ *
+ * Use of supply names configured via regulator_set_device_supply() is
+ * strongly encouraged. It is recommended that the supply name used
+ * should match the name used for the supply and/or the relevant
+ * device pins in the datasheet.
+ */
+struct regulator *regulator_get_optional(struct device *dev, const char *id)
+{
+ return _regulator_get(dev, id, 0);
+}
+EXPORT_SYMBOL_GPL(regulator_get_optional);
+
+/* regulator_list_mutex lock held by regulator_put() */
static void _regulator_put(struct regulator *regulator)
{
struct regulator_dev *rdev;
/* remove any sysfs entries */
if (regulator->dev)
sysfs_remove_link(&rdev->dev.kobj, regulator->supply_name);
+ mutex_lock(&rdev->mutex);
kfree(regulator->supply_name);
list_del(®ulator->list);
kfree(regulator);
rdev->open_count--;
rdev->exclusive = 0;
+ mutex_unlock(&rdev->mutex);
module_put(rdev->owner);
}
}
EXPORT_SYMBOL_GPL(regulator_put);
-static int devm_regulator_match(struct device *dev, void *res, void *data)
-{
- struct regulator **r = res;
- if (!r || !*r) {
- WARN_ON(!r || !*r);
- return 0;
- }
- return *r == data;
-}
-
-/**
- * devm_regulator_put - Resource managed regulator_put()
- * @regulator: regulator to free
- *
- * Deallocate a regulator allocated with devm_regulator_get(). Normally
- * this function will not need to be called and the resource management
- * code will ensure that the resource is freed.
- */
-void devm_regulator_put(struct regulator *regulator)
-{
- int rc;
-
- rc = devres_release(regulator->dev, devm_regulator_release,
- devm_regulator_match, regulator);
- if (rc != 0)
- WARN_ON(rc);
-}
-EXPORT_SYMBOL_GPL(devm_regulator_put);
-
/* Manage enable GPIO list. Same GPIO pin can be shared among regulators */
static int regulator_ena_gpio_request(struct regulator_dev *rdev,
const struct regulator_config *config)
trace_regulator_enable(rdev_get_name(rdev));
if (rdev->ena_pin) {
- ret = regulator_ena_gpio_ctrl(rdev, true);
- if (ret < 0)
- return ret;
- rdev->ena_gpio_state = 1;
+ if (!rdev->ena_gpio_state) {
+ ret = regulator_ena_gpio_ctrl(rdev, true);
+ if (ret < 0)
+ return ret;
+ rdev->ena_gpio_state = 1;
+ }
} else if (rdev->desc->ops->enable) {
ret = rdev->desc->ops->enable(rdev);
if (ret < 0)
trace_regulator_disable(rdev_get_name(rdev));
if (rdev->ena_pin) {
- ret = regulator_ena_gpio_ctrl(rdev, false);
- if (ret < 0)
- return ret;
- rdev->ena_gpio_state = 0;
+ if (rdev->ena_gpio_state) {
+ ret = regulator_ena_gpio_ctrl(rdev, false);
+ if (ret < 0)
+ return ret;
+ rdev->ena_gpio_state = 0;
+ }
} else if (rdev->desc->ops->disable) {
ret = rdev->desc->ops->disable(rdev);
}
EXPORT_SYMBOL_GPL(regulator_map_voltage_linear);
+static int _regulator_call_set_voltage(struct regulator_dev *rdev,
+ int min_uV, int max_uV,
+ unsigned *selector)
+{
+ struct pre_voltage_change_data data;
+ int ret;
+
+ data.old_uV = _regulator_get_voltage(rdev);
+ data.min_uV = min_uV;
+ data.max_uV = max_uV;
+ ret = _notifier_call_chain(rdev, REGULATOR_EVENT_PRE_VOLTAGE_CHANGE,
+ &data);
+ if (ret & NOTIFY_STOP_MASK)
+ return -EINVAL;
+
+ ret = rdev->desc->ops->set_voltage(rdev, min_uV, max_uV, selector);
+ if (ret >= 0)
+ return ret;
+
+ _notifier_call_chain(rdev, REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE,
+ (void *)data.old_uV);
+
+ return ret;
+}
+
+static int _regulator_call_set_voltage_sel(struct regulator_dev *rdev,
+ int uV, unsigned selector)
+{
+ struct pre_voltage_change_data data;
+ int ret;
+
+ data.old_uV = _regulator_get_voltage(rdev);
+ data.min_uV = uV;
+ data.max_uV = uV;
+ ret = _notifier_call_chain(rdev, REGULATOR_EVENT_PRE_VOLTAGE_CHANGE,
+ &data);
+ if (ret & NOTIFY_STOP_MASK)
+ return -EINVAL;
+
+ ret = rdev->desc->ops->set_voltage_sel(rdev, selector);
+ if (ret >= 0)
+ return ret;
+
+ _notifier_call_chain(rdev, REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE,
+ (void *)data.old_uV);
+
+ return ret;
+}
+
static int _regulator_do_set_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
}
if (rdev->desc->ops->set_voltage) {
- ret = rdev->desc->ops->set_voltage(rdev, min_uV, max_uV,
- &selector);
+ ret = _regulator_call_set_voltage(rdev, min_uV, max_uV,
+ &selector);
if (ret >= 0) {
if (rdev->desc->ops->list_voltage)
if (old_selector == selector)
ret = 0;
else
- ret = rdev->desc->ops->set_voltage_sel(
- rdev, ret);
+ ret = _regulator_call_set_voltage_sel(
+ rdev, best_val, selector);
} else {
ret = -EINVAL;
}
}
EXPORT_SYMBOL_GPL(regulator_get_current_limit);
+int regulator_is_supported_mode(struct regulator *regulator, int *mode)
+{
+ struct regulator_dev *rdev = regulator->rdev;
+ int ret;
+
+ mutex_lock(&rdev->mutex);
+
+ ret = regulator_mode_constrain(rdev, mode);
+
+ mutex_unlock(&rdev->mutex);
+
+ return ret;
+}
+
/**
* regulator_set_mode - set regulator operating mode
* @regulator: regulator source
/* notify regulator consumers and downstream regulator consumers.
* Note mutex must be held by caller.
*/
-static void _notifier_call_chain(struct regulator_dev *rdev,
+static int _notifier_call_chain(struct regulator_dev *rdev,
unsigned long event, void *data)
{
/* call rdev chain first */
- blocking_notifier_call_chain(&rdev->notifier, event, data);
+ return blocking_notifier_call_chain(&rdev->notifier, event, data);
}
/**
}
EXPORT_SYMBOL_GPL(regulator_bulk_get);
-/**
- * devm_regulator_bulk_get - managed get multiple regulator consumers
- *
- * @dev: Device to supply
- * @num_consumers: Number of consumers to register
- * @consumers: Configuration of consumers; clients are stored here.
- *
- * @return 0 on success, an errno on failure.
- *
- * This helper function allows drivers to get several regulator
- * consumers in one operation with management, the regulators will
- * automatically be freed when the device is unbound. If any of the
- * regulators cannot be acquired then any regulators that were
- * allocated will be freed before returning to the caller.
- */
-int devm_regulator_bulk_get(struct device *dev, int num_consumers,
- struct regulator_bulk_data *consumers)
-{
- int i;
- int ret;
-
- for (i = 0; i < num_consumers; i++)
- consumers[i].consumer = NULL;
-
- for (i = 0; i < num_consumers; i++) {
- consumers[i].consumer = devm_regulator_get(dev,
- consumers[i].supply);
- if (IS_ERR(consumers[i].consumer)) {
- ret = PTR_ERR(consumers[i].consumer);
- dev_err(dev, "Failed to get supply '%s': %d\n",
- consumers[i].supply, ret);
- consumers[i].consumer = NULL;
- goto err;
- }
- }
-
- return 0;
-
-err:
- for (i = 0; i < num_consumers && consumers[i].consumer; i++)
- devm_regulator_put(consumers[i].consumer);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(devm_regulator_bulk_get);
-
static void regulator_bulk_enable_async(void *data, async_cookie_t cookie)
{
struct regulator_bulk_data *bulk = data;
config->ena_gpio, ret);
goto wash;
}
-
- if (config->ena_gpio_flags & GPIOF_OUT_INIT_HIGH)
- rdev->ena_gpio_state = 1;
-
- if (config->ena_gpio_invert)
- rdev->ena_gpio_state = !rdev->ena_gpio_state;
}
/* set regulator constraints */
list_for_each_entry(rdev, ®ulator_list, list) {
mutex_lock(&rdev->mutex);
if (rdev->use_count > 0 || rdev->constraints->always_on) {
- error = _regulator_do_enable(rdev);
- if (error)
- ret = error;
+ if (!_regulator_is_enabled(rdev)) {
+ error = _regulator_do_enable(rdev);
+ if (error)
+ ret = error;
+ }
} else {
if (!has_full_constraints)
goto unlock;
projects / firefly-linux-kernel-4.4.55.git / blobdiff