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Commit c0eb4676 authored by Mark Brown's avatar Mark Brown
Browse files

regmap: Implement managed regmap_init() 



Save error handling and unwinding code in drivers by providing managed
versions of the regmap init functions, simplifying usage.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 567e4793

drivers/base/regmap/regmap-i2c.c

+17 −0
Original line number Diff line number Diff line
@@ -111,4 +111,21 @@ struct regmap *regmap_init_i2c(struct i2c_client *i2c, 
}

EXPORT_SYMBOL_GPL(regmap_init_i2c);



/**

 * devm_regmap_init_i2c(): Initialise managed register map

 *

 * @i2c: Device that will be interacted with

 * @config: Configuration for register map

 *

 * The return value will be an ERR_PTR() on error or a valid pointer

 * to a struct regmap.  The regmap will be automatically freed by the

 * device management code.

 */

struct regmap *devm_regmap_init_i2c(struct i2c_client *i2c,

				    const struct regmap_config *config)

{

	return devm_regmap_init(&i2c->dev, &regmap_i2c, config);

}

EXPORT_SYMBOL_GPL(devm_regmap_init_i2c);



MODULE_LICENSE("GPL");

drivers/base/regmap/regmap-spi.c

+17 −0
Original line number Diff line number Diff line
@@ -70,4 +70,21 @@ struct regmap *regmap_init_spi(struct spi_device *spi, 
}

EXPORT_SYMBOL_GPL(regmap_init_spi);



/**

 * devm_regmap_init_spi(): Initialise register map

 *

 * @spi: Device that will be interacted with

 * @config: Configuration for register map

 *

 * The return value will be an ERR_PTR() on error or a valid pointer

 * to a struct regmap.  The map will be automatically freed by the

 * device management code.

 */

struct regmap *devm_regmap_init_spi(struct spi_device *spi,

				    const struct regmap_config *config)

{

	return devm_regmap_init(&spi->dev, &regmap_spi, config);

}

EXPORT_SYMBOL_GPL(devm_regmap_init_spi);



MODULE_LICENSE("GPL");

drivers/base/regmap/regmap.c

+39 −0
Original line number Diff line number Diff line
@@ -258,6 +258,45 @@ err: 
}

EXPORT_SYMBOL_GPL(regmap_init);



static void devm_regmap_release(struct device *dev, void *res)

{

	regmap_exit(*(struct regmap **)res);

}



/**

 * devm_regmap_init(): Initialise managed register map

 *

 * @dev: Device that will be interacted with

 * @bus: Bus-specific callbacks to use with device

 * @config: Configuration for register map

 *

 * The return value will be an ERR_PTR() on error or a valid pointer

 * to a struct regmap.  This function should generally not be called

 * directly, it should be called by bus-specific init functions.  The

 * map will be automatically freed by the device management code.

 */

struct regmap *devm_regmap_init(struct device *dev,

				const struct regmap_bus *bus,

				const struct regmap_config *config)

{

	struct regmap **ptr, *regmap;



	ptr = devres_alloc(devm_regmap_release, sizeof(*ptr), GFP_KERNEL);

	if (!ptr)

		return ERR_PTR(-ENOMEM);



	regmap = regmap_init(dev, bus, config);

	if (!IS_ERR(regmap)) {

		*ptr = regmap;

		devres_add(dev, ptr);

	} else {

		devres_free(ptr);

	}



	return regmap;

}

EXPORT_SYMBOL_GPL(devm_regmap_init);



/**

 * regmap_reinit_cache(): Reinitialise the current register cache

 *

include/linux/regmap.h

+8 −0
Original line number Diff line number Diff line
@@ -127,6 +127,14 @@ struct regmap *regmap_init_i2c(struct i2c_client *i2c, 
struct regmap *regmap_init_spi(struct spi_device *dev,

			       const struct regmap_config *config);



struct regmap *devm_regmap_init(struct device *dev,

				const struct regmap_bus *bus,

				const struct regmap_config *config);

struct regmap *devm_regmap_init_i2c(struct i2c_client *i2c,

				    const struct regmap_config *config);

struct regmap *devm_regmap_init_spi(struct spi_device *dev,

				    const struct regmap_config *config);



void regmap_exit(struct regmap *map);

int regmap_reinit_cache(struct regmap *map,

			const struct regmap_config *config);