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Commit fd4b7286 authored by Kuninori Morimoto's avatar Kuninori Morimoto Committed by Mark Brown
Browse files

regmap: add regmap_write_bits() 



regmap_write_bits() is similar to regmap_update_bits(),
but regmap_write_bits() write data to register even though
it is same value.

Signed-off-by: default avatarKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 7ff0589c

drivers/base/regmap/regmap.c

+23 −0
Original line number Diff line number Diff line
@@ -2374,6 +2374,29 @@ int regmap_update_bits(struct regmap *map, unsigned int reg, 
}

EXPORT_SYMBOL_GPL(regmap_update_bits);



/**

 * regmap_write_bits: Perform a read/modify/write cycle on the register map

 *

 * @map: Register map to update

 * @reg: Register to update

 * @mask: Bitmask to change

 * @val: New value for bitmask

 *

 * Returns zero for success, a negative number on error.

 */

int regmap_write_bits(struct regmap *map, unsigned int reg,

		      unsigned int mask, unsigned int val)

{

	int ret;



	map->lock(map->lock_arg);

	ret = _regmap_update_bits(map, reg, mask, val, NULL, true);

	map->unlock(map->lock_arg);



	return ret;

}

EXPORT_SYMBOL_GPL(regmap_write_bits);



/**

 * regmap_update_bits_async: Perform a read/modify/write cycle on the register

 *                           map asynchronously

include/linux/regmap.h

+9 −0
Original line number Diff line number Diff line
@@ -424,6 +424,8 @@ int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val, 
		     size_t val_count);

int regmap_update_bits(struct regmap *map, unsigned int reg,

		       unsigned int mask, unsigned int val);

int regmap_write_bits(struct regmap *map, unsigned int reg,

		       unsigned int mask, unsigned int val);

int regmap_update_bits_async(struct regmap *map, unsigned int reg,

			     unsigned int mask, unsigned int val);

int regmap_update_bits_check(struct regmap *map, unsigned int reg,
@@ -645,6 +647,13 @@ static inline int regmap_update_bits(struct regmap *map, unsigned int reg, 
	return -EINVAL;

}



static inline int regmap_write_bits(struct regmap *map, unsigned int reg,

				     unsigned int mask, unsigned int val)

{

	WARN_ONCE(1, "regmap API is disabled");

	return -EINVAL;

}



static inline int regmap_update_bits_async(struct regmap *map,

					   unsigned int reg,

					   unsigned int mask, unsigned int val)