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path: root/drivers/regulator/core.c
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Diffstat (limited to 'drivers/regulator/core.c')
-rw-r--r--drivers/regulator/core.c58
1 files changed, 37 insertions, 21 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 9a09f3cdbabb..4c1f999041dd 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -844,13 +844,22 @@ static int machine_constraints_voltage(struct regulator_dev *rdev,
/* do we need to apply the constraint voltage */
if (rdev->constraints->apply_uV &&
rdev->constraints->min_uV == rdev->constraints->max_uV) {
- ret = _regulator_do_set_voltage(rdev,
- rdev->constraints->min_uV,
- rdev->constraints->max_uV);
- if (ret < 0) {
- rdev_err(rdev, "failed to apply %duV constraint\n",
- rdev->constraints->min_uV);
- return ret;
+ int current_uV = _regulator_get_voltage(rdev);
+ if (current_uV < 0) {
+ rdev_err(rdev, "failed to get the current voltage\n");
+ return current_uV;
+ }
+ if (current_uV < rdev->constraints->min_uV ||
+ current_uV > rdev->constraints->max_uV) {
+ ret = _regulator_do_set_voltage(
+ rdev, rdev->constraints->min_uV,
+ rdev->constraints->max_uV);
+ if (ret < 0) {
+ rdev_err(rdev,
+ "failed to apply %duV constraint\n",
+ rdev->constraints->min_uV);
+ return ret;
+ }
}
}
@@ -1430,9 +1439,9 @@ EXPORT_SYMBOL_GPL(regulator_get);
*
* 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.
+ * unable to obtain this regulator while 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 which cannot tolerate shared
* use of the regulator such as those which need to force the
@@ -1456,10 +1465,7 @@ EXPORT_SYMBOL_GPL(regulator_get_exclusive);
* @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.
+ * or IS_ERR() condition containing errno.
*
* This is intended for use by consumers for devices which can have
* some supplies unconnected in normal use, such as some MMC devices.
@@ -1597,9 +1603,10 @@ EXPORT_SYMBOL_GPL(regulator_unregister_supply_alias);
* registered any aliases that were registered will be removed
* before returning to the caller.
*/
-int regulator_bulk_register_supply_alias(struct device *dev, const char **id,
+int regulator_bulk_register_supply_alias(struct device *dev,
+ const char *const *id,
struct device *alias_dev,
- const char **alias_id,
+ const char *const *alias_id,
int num_id)
{
int i;
@@ -1637,7 +1644,7 @@ EXPORT_SYMBOL_GPL(regulator_bulk_register_supply_alias);
* aliases in one operation.
*/
void regulator_bulk_unregister_supply_alias(struct device *dev,
- const char **id,
+ const char *const *id,
int num_id)
{
int i;
@@ -2321,6 +2328,10 @@ static int _regulator_do_set_voltage(struct regulator_dev *rdev,
regulator_list_voltage_linear)
ret = regulator_map_voltage_linear(rdev,
min_uV, max_uV);
+ else if (rdev->desc->ops->list_voltage ==
+ regulator_list_voltage_linear_range)
+ ret = regulator_map_voltage_linear_range(rdev,
+ min_uV, max_uV);
else
ret = regulator_map_voltage_iterate(rdev,
min_uV, max_uV);
@@ -3447,7 +3458,7 @@ regulator_register(const struct regulator_desc *regulator_desc,
/* register with sysfs */
rdev->dev.class = &regulator_class;
- rdev->dev.of_node = config->of_node;
+ rdev->dev.of_node = of_node_get(config->of_node);
rdev->dev.parent = dev;
dev_set_name(&rdev->dev, "regulator.%d",
atomic_inc_return(&regulator_no) - 1);
@@ -3589,6 +3600,7 @@ void regulator_unregister(struct regulator_dev *rdev)
list_del(&rdev->list);
kfree(rdev->constraints);
regulator_ena_gpio_free(rdev);
+ of_node_put(rdev->dev.of_node);
device_unregister(&rdev->dev);
mutex_unlock(&regulator_list_mutex);
}
@@ -3819,8 +3831,9 @@ static int __init regulator_init_complete(void)
mutex_lock(&regulator_list_mutex);
/* If we have a full configuration then disable any regulators
- * which are not in use or always_on. This will become the
- * default behaviour in the future.
+ * we have permission to change the status for and which are
+ * not in use or always_on. This is effectively the default
+ * for DT and ACPI as they have full constraints.
*/
list_for_each_entry(rdev, &regulator_list, list) {
ops = rdev->desc->ops;
@@ -3829,6 +3842,9 @@ static int __init regulator_init_complete(void)
if (c && c->always_on)
continue;
+ if (c && !(c->valid_ops_mask & REGULATOR_CHANGE_STATUS))
+ continue;
+
mutex_lock(&rdev->mutex);
if (rdev->use_count)
@@ -3867,4 +3883,4 @@ unlock:
return 0;
}
-late_initcall(regulator_init_complete);
+late_initcall_sync(regulator_init_complete);