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regmap: add regmap_write_bits()

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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: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Kuninori Morimoto 2015-06-16 08:52:39 +00:00 committed by Mark Brown
parent 7ff0589c7b
commit fd4b7286cc
2 changed files with 32 additions and 0 deletions
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23
drivers/base/regmap/regmap.c
View File

@ -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

9
include/linux/regmap.h
View File

@ -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)