diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 1179766811f58365c32577ad4f6474fb3ac6362f..d0b3879f27469e90ba496a33c1157a7be4de757f 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1959,8 +1959,8 @@ static struct regulator_dev *regulator_dev_lookup(struct device *dev,
regulator_supply_alias(&dev, &supply);
/* first do a dt based lookup */
- if (dev && dev->of_node) {
- r = of_regulator_dev_lookup(dev, supply);
+ if (dev_of_node(dev)) {
+ r = of_regulator_dev_lookup(dev, dev_of_node(dev), supply);
if (!IS_ERR(r))
return r;
if (PTR_ERR(r) == -EPROBE_DEFER)
diff --git a/drivers/regulator/devres.c b/drivers/regulator/devres.c
index 1b893cdd1aad6115e1da8e2439a6772c47da602c..36164aec30e83de70d07d59b57678b89336bc4c7 100644
--- a/drivers/regulator/devres.c
+++ b/drivers/regulator/devres.c
@@ -749,3 +749,42 @@ void *devm_regulator_irq_helper(struct device *dev,
return ptr;
}
EXPORT_SYMBOL_GPL(devm_regulator_irq_helper);
+
+#if IS_ENABLED(CONFIG_OF)
+static struct regulator *_devm_of_regulator_get(struct device *dev, struct device_node *node,
+ const char *id, int get_type)
+{
+ struct regulator **ptr, *regulator;
+
+ ptr = devres_alloc(devm_regulator_release, sizeof(*ptr), GFP_KERNEL);
+ if (!ptr)
+ return ERR_PTR(-ENOMEM);
+
+ regulator = _of_regulator_get(dev, node, id, get_type);
+ if (!IS_ERR(regulator)) {
+ *ptr = regulator;
+ devres_add(dev, ptr);
+ } else {
+ devres_free(ptr);
+ }
+
+ return regulator;
+}
+
+/**
+ * devm_of_regulator_get_optional - Resource managed of_regulator_get_optional()
+ * @dev: device used for dev_printk() messages and resource lifetime management
+ * @node: device node 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
+ * of_regulator_get_optional() for more information.
+ */
+struct regulator *devm_of_regulator_get_optional(struct device *dev, struct device_node *node,
+ const char *id)
+{
+ return _devm_of_regulator_get(dev, node, id, OPTIONAL_GET);
+}
+EXPORT_SYMBOL_GPL(devm_of_regulator_get_optional);
+#endif
diff --git a/drivers/regulator/internal.h b/drivers/regulator/internal.h
index 5b43f802468ddbfae36660fc7dc545c28afd20c2..b3d48dc38bc4a5b9bef1ebad1103bda2594772bf 100644
--- a/drivers/regulator/internal.h
+++ b/drivers/regulator/internal.h
@@ -65,14 +65,25 @@ static inline struct regulator_dev *dev_to_rdev(struct device *dev)
return container_of(dev, struct regulator_dev, dev);
}
+enum regulator_get_type {
+ NORMAL_GET,
+ EXCLUSIVE_GET,
+ OPTIONAL_GET,
+ MAX_GET_TYPE
+};
+
#ifdef CONFIG_OF
struct regulator_dev *of_regulator_dev_lookup(struct device *dev,
+ struct device_node *np,
const char *supply);
struct regulator_init_data *regulator_of_get_init_data(struct device *dev,
const struct regulator_desc *desc,
struct regulator_config *config,
struct device_node **node);
+struct regulator *_of_regulator_get(struct device *dev, struct device_node *node,
+ const char *id, enum regulator_get_type get_type);
+
struct regulator_dev *of_parse_coupled_regulator(struct regulator_dev *rdev,
int index);
@@ -82,6 +93,7 @@ bool of_check_coupling_data(struct regulator_dev *rdev);
#else
static inline struct regulator_dev *of_regulator_dev_lookup(struct device *dev,
+ struct device_node *np,
const char *supply)
{
return ERR_PTR(-ENODEV);
@@ -114,12 +126,6 @@ static inline bool of_check_coupling_data(struct regulator_dev *rdev)
}
#endif
-enum regulator_get_type {
- NORMAL_GET,
- EXCLUSIVE_GET,
- OPTIONAL_GET,
- MAX_GET_TYPE
-};
int _regulator_get_common_check(struct device *dev, const char *id,
enum regulator_get_type get_type);
diff --git a/drivers/regulator/of_regulator.c b/drivers/regulator/of_regulator.c
index 3f490d81abc28fe9f6767afe850e0fc883eddb55..3d85762beda636479f3b3b808602a0be221c0c77 100644
--- a/drivers/regulator/of_regulator.c
+++ b/drivers/regulator/of_regulator.c
@@ -588,7 +588,8 @@ static struct device_node *of_get_child_regulator(struct device_node *parent,
/**
* of_get_regulator - get a regulator device node based on supply name
- * @dev: Device pointer for the consumer (of regulator) device
+ * @dev: Device pointer for dev_printk() messages
+ * @node: Device node pointer for supply property lookup
* @supply: regulator supply name
*
* Extract the regulator device node corresponding to the supply name.
@@ -596,15 +597,16 @@ static struct device_node *of_get_child_regulator(struct device_node *parent,
* Return: Pointer to the &struct device_node corresponding to the regulator
* if found, or %NULL if not found.
*/
-static struct device_node *of_get_regulator(struct device *dev, const char *supply)
+static struct device_node *of_get_regulator(struct device *dev, struct device_node *node,
+ const char *supply)
{
struct device_node *regnode = NULL;
char prop_name[64]; /* 64 is max size of property name */
- dev_dbg(dev, "Looking up %s-supply from device tree\n", supply);
+ dev_dbg(dev, "Looking up %s-supply from device node %pOF\n", supply, node);
snprintf(prop_name, 64, "%s-supply", supply);
- regnode = of_parse_phandle(dev->of_node, prop_name, 0);
+ regnode = of_parse_phandle(node, prop_name, 0);
if (regnode)
return regnode;
@@ -628,6 +630,7 @@ static struct regulator_dev *of_find_regulator_by_node(struct device_node *np)
/**
* of_regulator_dev_lookup - lookup a regulator device with device tree only
* @dev: Device pointer for regulator supply lookup.
+ * @np: Device node pointer for regulator supply lookup.
* @supply: Supply name or regulator ID.
*
* Return: Pointer to the &struct regulator_dev on success, or ERR_PTR()
@@ -642,13 +645,13 @@ static struct regulator_dev *of_find_regulator_by_node(struct device_node *np)
* * -%ENODEV if lookup fails permanently.
* * -%EPROBE_DEFER if lookup could succeed in the future.
*/
-struct regulator_dev *of_regulator_dev_lookup(struct device *dev,
+struct regulator_dev *of_regulator_dev_lookup(struct device *dev, struct device_node *np,
const char *supply)
{
struct regulator_dev *r;
struct device_node *node;
- node = of_get_regulator(dev, supply);
+ node = of_get_regulator(dev, np, supply);
if (node) {
r = of_find_regulator_by_node(node);
of_node_put(node);
@@ -665,6 +668,42 @@ struct regulator_dev *of_regulator_dev_lookup(struct device *dev,
return ERR_PTR(-ENODEV);
}
+struct regulator *_of_regulator_get(struct device *dev, struct device_node *node,
+ const char *id, enum regulator_get_type get_type)
+{
+ struct regulator_dev *r;
+ int ret;
+
+ ret = _regulator_get_common_check(dev, id, get_type);
+ if (ret)
+ return ERR_PTR(ret);
+
+ r = of_regulator_dev_lookup(dev, node, id);
+ return _regulator_get_common(r, dev, id, get_type);
+}
+
+/**
+ * of_regulator_get_optional - get optional regulator via device tree lookup
+ * @dev: device used for dev_printk() messages
+ * @node: device node for regulator "consumer"
+ * @id: Supply name
+ *
+ * Return: pointer to struct regulator corresponding to the regulator producer,
+ * or PTR_ERR() encoded error number.
+ *
+ * This is intended for use by consumers that want to get a regulator
+ * supply directly from a device node, and can and want to deal with
+ * absence of such supplies. This will _not_ consider supply aliases.
+ * See regulator_dev_lookup().
+ */
+struct regulator *of_regulator_get_optional(struct device *dev,
+ struct device_node *node,
+ const char *id)
+{
+ return _of_regulator_get(dev, node, id, OPTIONAL_GET);
+}
+EXPORT_SYMBOL_GPL(of_regulator_get_optional);
+
/*
* Returns number of regulators coupled with rdev.
*/
diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/consumer.h
index b9ce521910a00293f19a7289d600a91c04311383..8c3c372ad735e5e33bc0a02770d42a21dd67e37d 100644
--- a/include/linux/regulator/consumer.h
+++ b/include/linux/regulator/consumer.h
@@ -168,6 +168,29 @@ int devm_regulator_get_enable_read_voltage(struct device *dev, const char *id);
void regulator_put(struct regulator *regulator);
void devm_regulator_put(struct regulator *regulator);
+#if IS_ENABLED(CONFIG_OF)
+struct regulator *__must_check of_regulator_get_optional(struct device *dev,
+ struct device_node *node,
+ const char *id);
+struct regulator *__must_check devm_of_regulator_get_optional(struct device *dev,
+ struct device_node *node,
+ const char *id);
+#else
+static inline struct regulator *__must_check of_regulator_get_optional(struct device *dev,
+ struct device_node *node,
+ const char *id)
+{
+ return ERR_PTR(-ENODEV);
+}
+
+static inline struct regulator *__must_check devm_of_regulator_get_optional(struct device *dev,
+ struct device_node *node,
+ const char *id)
+{
+ return ERR_PTR(-ENODEV);
+}
+#endif
+
int regulator_register_supply_alias(struct device *dev, const char *id,
struct device *alias_dev,
const char *alias_id);
@@ -350,6 +373,20 @@ devm_regulator_get_optional(struct device *dev, const char *id)
return ERR_PTR(-ENODEV);
}
+static inline struct regulator *__must_check of_regulator_get_optional(struct device *dev,
+ struct device_node *node,
+ const char *id)
+{
+ return ERR_PTR(-ENODEV);
+}
+
+static inline struct regulator *__must_check devm_of_regulator_get_optional(struct device *dev,
+ struct device_node *node,
+ const char *id)
+{
+ return ERR_PTR(-ENODEV);
+}
+
static inline void regulator_put(struct regulator *regulator)
{
}