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regmap: core: Provide regmap_can_raw_write() operation

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Mainly useful internally but exported since this is a public API that's
being checked for.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2013-03-26 21:24:20 +00:00
parent 8817796b75
commit 221ad7f2df
2 changed files with 13 additions and 3 deletions
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15
drivers/base/regmap/regmap.c
View file

@ -1097,6 +1097,17 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg,
return ret;
}
/**
* regmap_can_raw_write - Test if regmap_raw_write() is supported
*
* @map: Map to check.
*/
bool regmap_can_raw_write(struct regmap *map)
{
return map->bus && map->format.format_val && map->format.format_reg;
}
EXPORT_SYMBOL_GPL(regmap_can_raw_write);
static int _regmap_bus_formatted_write(void *context, unsigned int reg,
unsigned int val)
{
@ -1220,12 +1231,10 @@ int regmap_raw_write(struct regmap *map, unsigned int reg,
{
int ret;
if (!map->bus)
if (!regmap_can_raw_write(map))
return -EINVAL;
if (val_len % map->format.val_bytes)
return -EINVAL;
if (reg % map->reg_stride)
return -EINVAL;
map->lock(map->lock_arg);

1
include/linux/regmap.h
View file

@ -389,6 +389,7 @@ int regmap_update_bits_check(struct regmap *map, unsigned int reg,
bool *change);
int regmap_get_val_bytes(struct regmap *map);
int regmap_async_complete(struct regmap *map);
bool regmap_can_raw_write(struct regmap *map);
int regcache_sync(struct regmap *map);
int regcache_sync_region(struct regmap *map, unsigned int min,