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regulator: Add (devm_)of_regulator_get()

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The Rockchip power-domain controller also plans to make use of
per-domain regulators similar to the MediaTek power-domain controller.
Since existing DTs are missing the regulator information, the kernel
should fallback to the automatically created dummy regulator if
necessary. Thus the version without the _optional suffix is needed.

The Rockchip driver plans to use the managed version, but to be
consistent with existing code the unmanaged version is added at the
same time.

Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://patch.msgid.link/20250220-rk3588-gpu-pwr-domain-regulator-v6-1-a4f9c24e5b81@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Sebastian Reichel 2025-02-20 19:58:04 +01:00 • committed by Mark Brown
parent 0ad2507d5d
commit 0dffacbbf8
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GPG key ID: 24D68B725D5487D0
3 changed files with 44 additions and 0 deletions
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17
drivers/regulator/devres.c
View file

@ -771,6 +771,23 @@ static struct regulator *_devm_of_regulator_get(struct device *dev, struct devic
return regulator;
}
/**
* devm_of_regulator_get - Resource managed of_regulator_get()
* @dev: device used for dev_printk() messages and resource lifetime management
* @node: device node for regulator "consumer"
* @id: supply name or regulator ID.
*
* Managed of_regulator_get(). Regulators returned from this
* function are automatically regulator_put() on driver detach. See
* of_regulator_get() for more information.
*/
struct regulator *devm_of_regulator_get(struct device *dev, struct device_node *node,
const char *id)
{
return _devm_of_regulator_get(dev, node, id, NORMAL_GET);
}
EXPORT_SYMBOL_GPL(devm_of_regulator_get);
/**
* devm_of_regulator_get_optional - Resource managed of_regulator_get_optional()
* @dev: device used for dev_printk() messages and resource lifetime management

21
drivers/regulator/of_regulator.c
View file

@ -697,6 +697,27 @@ struct regulator *_of_regulator_get(struct device *dev, struct device_node *node
return _regulator_get_common(r, dev, id, get_type);
}
/**
* of_regulator_get - get 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. This will _not_ consider supply
* aliases. See regulator_dev_lookup().
*/
struct regulator *of_regulator_get(struct device *dev,
struct device_node *node,
const char *id)
{
return _of_regulator_get(dev, node, id, NORMAL_GET);
}
EXPORT_SYMBOL_GPL(of_regulator_get);
/**
* of_regulator_get_optional - get optional regulator via device tree lookup
* @dev: device used for dev_printk() messages

6
include/linux/regulator/consumer.h
View file

@ -677,6 +677,12 @@ regulator_is_equal(struct regulator *reg1, struct regulator *reg2)
#endif
#if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_REGULATOR)
struct regulator *__must_check of_regulator_get(struct device *dev,
struct device_node *node,
const char *id);
struct regulator *__must_check devm_of_regulator_get(struct device *dev,
struct device_node *node,
const char *id);
struct regulator *__must_check of_regulator_get_optional(struct device *dev,
struct device_node *node,
const char *id);