}
static DEVICE_ATTR(microamps, 0444, regulator_uA_show, NULL);
-static ssize_t regulator_name_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+static ssize_t name_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
{
struct regulator_dev *rdev = dev_get_drvdata(dev);
return sprintf(buf, "%s\n", rdev_get_name(rdev));
}
+static DEVICE_ATTR_RO(name);
static ssize_t regulator_print_opmode(char *buf, int mode)
{
}
static DEVICE_ATTR(requested_microamps, 0444, regulator_total_uA_show, NULL);
-static ssize_t regulator_num_users_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+static ssize_t num_users_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
{
struct regulator_dev *rdev = dev_get_drvdata(dev);
return sprintf(buf, "%d\n", rdev->use_count);
}
+static DEVICE_ATTR_RO(num_users);
-static ssize_t regulator_type_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+static ssize_t type_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
{
struct regulator_dev *rdev = dev_get_drvdata(dev);
}
return sprintf(buf, "unknown\n");
}
+static DEVICE_ATTR_RO(type);
static ssize_t regulator_suspend_mem_uV_show(struct device *dev,
struct device_attribute *attr, char *buf)
* These are the only attributes are present for all regulators.
* Other attributes are a function of regulator functionality.
*/
-static struct device_attribute regulator_dev_attrs[] = {
- __ATTR(name, 0444, regulator_name_show, NULL),
- __ATTR(num_users, 0444, regulator_num_users_show, NULL),
- __ATTR(type, 0444, regulator_type_show, NULL),
- __ATTR_NULL,
+static struct attribute *regulator_dev_attrs[] = {
+ &dev_attr_name.attr,
+ &dev_attr_num_users.attr,
+ &dev_attr_type.attr,
+ NULL,
};
+ATTRIBUTE_GROUPS(regulator_dev);
static void regulator_dev_release(struct device *dev)
{
static struct class regulator_class = {
.name = "regulator",
.dev_release = regulator_dev_release,
- .dev_attrs = regulator_dev_attrs,
+ .dev_groups = regulator_dev_groups,
};
/* Calculate the new optimum regulator operating mode based on the new total
}
}
- if (rdev->constraints->ramp_delay && ops->set_ramp_delay) {
+ if ((rdev->constraints->ramp_delay || rdev->constraints->ramp_disable)
+ && ops->set_ramp_delay) {
ret = ops->set_ramp_delay(rdev, rdev->constraints->ramp_delay);
if (ret < 0) {
rdev_err(rdev, "failed to set ramp_delay\n");
/* Internal regulator request function */
static struct regulator *_regulator_get(struct device *dev, const char *id,
- int exclusive)
+ bool exclusive)
{
struct regulator_dev *rdev;
struct regulator *regulator = ERR_PTR(-EPROBE_DEFER);
*/
struct regulator *regulator_get(struct device *dev, const char *id)
{
- return _regulator_get(dev, id, 0);
+ return _regulator_get(dev, id, false);
}
EXPORT_SYMBOL_GPL(regulator_get);
*/
struct regulator *regulator_get_exclusive(struct device *dev, const char *id)
{
- return _regulator_get(dev, id, 1);
+ return _regulator_get(dev, id, true);
}
EXPORT_SYMBOL_GPL(regulator_get_exclusive);
+/**
+ * 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);
+
+/**
+ * devm_regulator_get_optional - Resource managed regulator_get_optional()
+ * @dev: device for regulator "consumer"
+ * @id: Supply name or regulator ID.
+ *
+ * Managed regulator_get_optional(). Regulators returned from this
+ * function are automatically regulator_put() on driver detach. See
+ * regulator_get_optional() for more information.
+ */
+struct regulator *devm_regulator_get_optional(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_optional(dev, id);
+ if (!IS_ERR(regulator)) {
+ *ptr = regulator;
+ devres_add(dev, ptr);
+ } else {
+ devres_free(ptr);
+ }
+
+ return regulator;
+}
+EXPORT_SYMBOL_GPL(devm_regulator_get_optional);
+
/* Locks held by regulator_put() */
static void _regulator_put(struct regulator *regulator)
{
module_put(rdev->owner);
}
+/**
+ * devm_regulator_get_exclusive - Resource managed regulator_get_exclusive()
+ * @dev: device for regulator "consumer"
+ * @id: Supply name or regulator ID.
+ *
+ * Managed regulator_get_exclusive(). Regulators returned from this function
+ * are automatically regulator_put() on driver detach. See regulator_get() for
+ * more information.
+ */
+struct regulator *devm_regulator_get_exclusive(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, 1);
+ if (!IS_ERR(regulator)) {
+ *ptr = regulator;
+ devres_add(dev, ptr);
+ } else {
+ devres_free(ptr);
+ }
+
+ return regulator;
+}
+EXPORT_SYMBOL_GPL(devm_regulator_get_exclusive);
+
/**
* regulator_put - "free" the regulator source
* @regulator: regulator source
rdev->deferred_disables++;
mutex_unlock(&rdev->mutex);
- ret = schedule_delayed_work(&rdev->disable_work,
- msecs_to_jiffies(ms));
+ ret = queue_delayed_work(system_power_efficient_wq,
+ &rdev->disable_work,
+ msecs_to_jiffies(ms));
if (ret < 0)
return ret;
else
}
EXPORT_SYMBOL_GPL(regulator_disable_deferred);
-/**
- * regulator_is_enabled_regmap - standard is_enabled() for regmap users
- *
- * @rdev: regulator to operate on
- *
- * Regulators that use regmap for their register I/O can set the
- * enable_reg and enable_mask fields in their descriptor and then use
- * this as their is_enabled operation, saving some code.
- */
-int regulator_is_enabled_regmap(struct regulator_dev *rdev)
-{
- unsigned int val;
- int ret;
-
- ret = regmap_read(rdev->regmap, rdev->desc->enable_reg, &val);
- if (ret != 0)
- return ret;
-
- if (rdev->desc->enable_is_inverted)
- return (val & rdev->desc->enable_mask) == 0;
- else
- return (val & rdev->desc->enable_mask) != 0;
-}
-EXPORT_SYMBOL_GPL(regulator_is_enabled_regmap);
-
-/**
- * regulator_enable_regmap - standard enable() for regmap users
- *
- * @rdev: regulator to operate on
- *
- * Regulators that use regmap for their register I/O can set the
- * enable_reg and enable_mask fields in their descriptor and then use
- * this as their enable() operation, saving some code.
- */
-int regulator_enable_regmap(struct regulator_dev *rdev)
-{
- unsigned int val;
-
- if (rdev->desc->enable_is_inverted)
- val = 0;
- else
- val = rdev->desc->enable_mask;
-
- return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
- rdev->desc->enable_mask, val);
-}
-EXPORT_SYMBOL_GPL(regulator_enable_regmap);
-
-/**
- * regulator_disable_regmap - standard disable() for regmap users
- *
- * @rdev: regulator to operate on
- *
- * Regulators that use regmap for their register I/O can set the
- * enable_reg and enable_mask fields in their descriptor and then use
- * this as their disable() operation, saving some code.
- */
-int regulator_disable_regmap(struct regulator_dev *rdev)
-{
- unsigned int val;
-
- if (rdev->desc->enable_is_inverted)
- val = rdev->desc->enable_mask;
- else
- val = 0;
-
- return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
- rdev->desc->enable_mask, val);
-}
-EXPORT_SYMBOL_GPL(regulator_disable_regmap);
-
static int _regulator_is_enabled(struct regulator_dev *rdev)
{
/* A GPIO control always takes precedence */
}
EXPORT_SYMBOL_GPL(regulator_count_voltages);
-/**
- * regulator_list_voltage_linear - List voltages with simple calculation
- *
- * @rdev: Regulator device
- * @selector: Selector to convert into a voltage
- *
- * Regulators with a simple linear mapping between voltages and
- * selectors can set min_uV and uV_step in the regulator descriptor
- * and then use this function as their list_voltage() operation,
- */
-int regulator_list_voltage_linear(struct regulator_dev *rdev,
- unsigned int selector)
-{
- if (selector >= rdev->desc->n_voltages)
- return -EINVAL;
- if (selector < rdev->desc->linear_min_sel)
- return 0;
-
- selector -= rdev->desc->linear_min_sel;
-
- return rdev->desc->min_uV + (rdev->desc->uV_step * selector);
-}
-EXPORT_SYMBOL_GPL(regulator_list_voltage_linear);
-
-/**
- * regulator_list_voltage_table - List voltages with table based mapping
- *
- * @rdev: Regulator device
- * @selector: Selector to convert into a voltage
- *
- * Regulators with table based mapping between voltages and
- * selectors can set volt_table in the regulator descriptor
- * and then use this function as their list_voltage() operation.
- */
-int regulator_list_voltage_table(struct regulator_dev *rdev,
- unsigned int selector)
-{
- if (!rdev->desc->volt_table) {
- BUG_ON(!rdev->desc->volt_table);
- return -EINVAL;
- }
-
- if (selector >= rdev->desc->n_voltages)
- return -EINVAL;
-
- return rdev->desc->volt_table[selector];
-}
-EXPORT_SYMBOL_GPL(regulator_list_voltage_table);
-
/**
* regulator_list_voltage - enumerate supported voltages
* @regulator: regulator source
}
EXPORT_SYMBOL_GPL(regulator_is_supported_voltage);
-/**
- * regulator_get_voltage_sel_regmap - standard get_voltage_sel for regmap users
- *
- * @rdev: regulator to operate on
- *
- * Regulators that use regmap for their register I/O can set the
- * vsel_reg and vsel_mask fields in their descriptor and then use this
- * as their get_voltage_vsel operation, saving some code.
- */
-int regulator_get_voltage_sel_regmap(struct regulator_dev *rdev)
-{
- unsigned int val;
- int ret;
-
- ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &val);
- if (ret != 0)
- return ret;
-
- val &= rdev->desc->vsel_mask;
- val >>= ffs(rdev->desc->vsel_mask) - 1;
-
- return val;
-}
-EXPORT_SYMBOL_GPL(regulator_get_voltage_sel_regmap);
-
-/**
- * regulator_set_voltage_sel_regmap - standard set_voltage_sel for regmap users
- *
- * @rdev: regulator to operate on
- * @sel: Selector to set
- *
- * Regulators that use regmap for their register I/O can set the
- * vsel_reg and vsel_mask fields in their descriptor and then use this
- * as their set_voltage_vsel operation, saving some code.
- */
-int regulator_set_voltage_sel_regmap(struct regulator_dev *rdev, unsigned sel)
-{
- int ret;
-
- sel <<= ffs(rdev->desc->vsel_mask) - 1;
-
- ret = regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg,
- rdev->desc->vsel_mask, sel);
- if (ret)
- return ret;
-
- if (rdev->desc->apply_bit)
- ret = regmap_update_bits(rdev->regmap, rdev->desc->apply_reg,
- rdev->desc->apply_bit,
- rdev->desc->apply_bit);
- return ret;
-}
-EXPORT_SYMBOL_GPL(regulator_set_voltage_sel_regmap);
-
-/**
- * regulator_map_voltage_iterate - map_voltage() based on list_voltage()
- *
- * @rdev: Regulator to operate on
- * @min_uV: Lower bound for voltage
- * @max_uV: Upper bound for voltage
- *
- * Drivers implementing set_voltage_sel() and list_voltage() can use
- * this as their map_voltage() operation. It will find a suitable
- * voltage by calling list_voltage() until it gets something in bounds
- * for the requested voltages.
- */
-int regulator_map_voltage_iterate(struct regulator_dev *rdev,
- int min_uV, int max_uV)
-{
- int best_val = INT_MAX;
- int selector = 0;
- int i, ret;
-
- /* Find the smallest voltage that falls within the specified
- * range.
- */
- for (i = 0; i < rdev->desc->n_voltages; i++) {
- ret = rdev->desc->ops->list_voltage(rdev, i);
- if (ret < 0)
- continue;
-
- if (ret < best_val && ret >= min_uV && ret <= max_uV) {
- best_val = ret;
- selector = i;
- }
- }
-
- if (best_val != INT_MAX)
- return selector;
- else
- return -EINVAL;
-}
-EXPORT_SYMBOL_GPL(regulator_map_voltage_iterate);
-
-/**
- * regulator_map_voltage_ascend - map_voltage() for ascendant voltage list
- *
- * @rdev: Regulator to operate on
- * @min_uV: Lower bound for voltage
- * @max_uV: Upper bound for voltage
- *
- * Drivers that have ascendant voltage list can use this as their
- * map_voltage() operation.
- */
-int regulator_map_voltage_ascend(struct regulator_dev *rdev,
- int min_uV, int max_uV)
-{
- int i, ret;
-
- for (i = 0; i < rdev->desc->n_voltages; i++) {
- ret = rdev->desc->ops->list_voltage(rdev, i);
- if (ret < 0)
- continue;
-
- if (ret > max_uV)
- break;
-
- if (ret >= min_uV && ret <= max_uV)
- return i;
- }
-
- return -EINVAL;
-}
-EXPORT_SYMBOL_GPL(regulator_map_voltage_ascend);
-
-/**
- * regulator_map_voltage_linear - map_voltage() for simple linear mappings
- *
- * @rdev: Regulator to operate on
- * @min_uV: Lower bound for voltage
- * @max_uV: Upper bound for voltage
- *
- * Drivers providing min_uV and uV_step in their regulator_desc can
- * use this as their map_voltage() operation.
- */
-int regulator_map_voltage_linear(struct regulator_dev *rdev,
- int min_uV, int max_uV)
-{
- int ret, voltage;
-
- /* Allow uV_step to be 0 for fixed voltage */
- if (rdev->desc->n_voltages == 1 && rdev->desc->uV_step == 0) {
- if (min_uV <= rdev->desc->min_uV && rdev->desc->min_uV <= max_uV)
- return 0;
- else
- return -EINVAL;
- }
-
- if (!rdev->desc->uV_step) {
- BUG_ON(!rdev->desc->uV_step);
- return -EINVAL;
- }
-
- if (min_uV < rdev->desc->min_uV)
- min_uV = rdev->desc->min_uV;
-
- ret = DIV_ROUND_UP(min_uV - rdev->desc->min_uV, rdev->desc->uV_step);
- if (ret < 0)
- return ret;
-
- ret += rdev->desc->linear_min_sel;
-
- /* Map back into a voltage to verify we're still in bounds */
- voltage = rdev->desc->ops->list_voltage(rdev, ret);
- if (voltage < min_uV || voltage > max_uV)
- return -EINVAL;
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(regulator_map_voltage_linear);
-
static int _regulator_do_set_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
}
/* Call set_voltage_time_sel if successfully obtained old_selector */
- if (ret == 0 && _regulator_is_enabled(rdev) && old_selector >= 0 &&
- old_selector != selector && rdev->desc->ops->set_voltage_time_sel) {
+ if (ret == 0 && !rdev->constraints->ramp_disable && old_selector >= 0
+ && old_selector != selector) {
delay = rdev->desc->ops->set_voltage_time_sel(rdev,
old_selector, selector);
}
EXPORT_SYMBOL_GPL(regulator_set_optimum_mode);
-/**
- * regulator_set_bypass_regmap - Default set_bypass() using regmap
- *
- * @rdev: device to operate on.
- * @enable: state to set.
- */
-int regulator_set_bypass_regmap(struct regulator_dev *rdev, bool enable)
-{
- unsigned int val;
-
- if (enable)
- val = rdev->desc->bypass_mask;
- else
- val = 0;
-
- return regmap_update_bits(rdev->regmap, rdev->desc->bypass_reg,
- rdev->desc->bypass_mask, val);
-}
-EXPORT_SYMBOL_GPL(regulator_set_bypass_regmap);
-
-/**
- * regulator_get_bypass_regmap - Default get_bypass() using regmap
- *
- * @rdev: device to operate on.
- * @enable: current state.
- */
-int regulator_get_bypass_regmap(struct regulator_dev *rdev, bool *enable)
-{
- unsigned int val;
- int ret;
-
- ret = regmap_read(rdev->regmap, rdev->desc->bypass_reg, &val);
- if (ret != 0)
- return ret;
-
- *enable = val & rdev->desc->bypass_mask;
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(regulator_get_bypass_regmap);
-
/**
* regulator_allow_bypass - allow the regulator to go into bypass mode
*
if (rdev == NULL)
return;
- if (rdev->supply)
+ if (rdev->supply) {
+ while (rdev->use_count--)
+ regulator_disable(rdev->supply);
regulator_put(rdev->supply);
+ }
mutex_lock(®ulator_list_mutex);
debugfs_remove_recursive(rdev->debugfs);
flush_work(&rdev->disable_work.work);
projects / cascardo / linux.git / commitdiff