regulator: Add devm_regulator_get()
Add a resource managed regulator_get() to simplify regulator usage in drivers. This allows driver authors to "get and forget" about their regulators by automatically calling regulator_put() when the driver is detached. [Fixed up a couple of coding style issues -- broonie] Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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dcd6c92267
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070b907922
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@ -267,3 +267,6 @@ IOMAP
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pcim_iounmap()
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pcim_iomap_table() : array of mapped addresses indexed by BAR
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pcim_iomap_regions() : do request_region() and iomap() on multiple BARs
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REGULATOR
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devm_regulator_get()
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@ -1320,6 +1320,40 @@ struct regulator *regulator_get(struct device *dev, const char *id)
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}
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EXPORT_SYMBOL_GPL(regulator_get);
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static void devm_regulator_release(struct device *dev, void *res)
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{
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regulator_put(*(struct regulator **)res);
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}
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/**
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* devm_regulator_get - Resource managed regulator_get()
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* @dev: device for regulator "consumer"
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* @id: Supply name or regulator ID.
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*
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* Managed regulator_get(). Regulators returned from this function are
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* automatically regulator_put() on driver detach. See regulator_get() for more
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* information.
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*/
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struct regulator *devm_regulator_get(struct device *dev, const char *id)
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{
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struct regulator **ptr, *regulator;
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ptr = devres_alloc(devm_regulator_release, sizeof(*ptr), GFP_KERNEL);
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if (!ptr)
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return ERR_PTR(-ENOMEM);
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regulator = regulator_get(dev, id);
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if (!IS_ERR(regulator)) {
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*ptr = regulator;
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devres_add(dev, ptr);
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} else {
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devres_free(ptr);
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}
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return regulator;
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}
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EXPORT_SYMBOL_GPL(devm_regulator_get);
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/**
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* regulator_get_exclusive - obtain exclusive access to a regulator.
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* @dev: device for regulator "consumer"
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@ -132,6 +132,8 @@ struct regulator_bulk_data {
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/* regulator get and put */
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struct regulator *__must_check regulator_get(struct device *dev,
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const char *id);
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struct regulator *__must_check devm_regulator_get(struct device *dev,
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const char *id);
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struct regulator *__must_check regulator_get_exclusive(struct device *dev,
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const char *id);
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void regulator_put(struct regulator *regulator);
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@ -200,6 +202,13 @@ static inline struct regulator *__must_check regulator_get(struct device *dev,
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*/
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return NULL;
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}
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static inline struct regulator *__must_check
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devm_regulator_get(struct device *dev, const char *id)
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{
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return NULL;
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}
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static inline void regulator_put(struct regulator *regulator)
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{
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}
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