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regmap: add regmap_might_sleep() 

With the dawn of MMIO gpio-regmap users, it is desirable to let
gpio-regmap ask the regmap if it might sleep during an access so
it can pass that information to gpiochip. Add a new regmap_might_sleep()
to query the regmap.

Signed-off-by: Michael Walle <michael@walle.cc>
Link: https://lore.kernel.org/r/20221121150843.1562603-1-michael@walle.cc
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Michael Walle 2022-11-21 16:08:42 +01:00 committed by Mark Brown
parent 9abf2313ad
commit a6d99022e5
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2 changed files with 20 additions and 0 deletions
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13
drivers/base/regmap/regmap.c
View File

@ -3486,6 +3486,19 @@ int regmap_get_reg_stride(struct regmap *map)
}
EXPORT_SYMBOL_GPL(regmap_get_reg_stride);
/**
* regmap_might_sleep() - Returns whether a regmap access might sleep.
*
* @map: Register map to operate on.
*
* Returns true if an access to the register might sleep, else false.
*/
bool regmap_might_sleep(struct regmap *map)
{
return map->can_sleep;
}
EXPORT_SYMBOL_GPL(regmap_might_sleep);
int regmap_parse_val(struct regmap *map, const void *buf,
unsigned int *val)
{

7
include/linux/regmap.h
View File

@ -1219,6 +1219,7 @@ static inline int regmap_write_bits(struct regmap *map, unsigned int reg,
int regmap_get_val_bytes(struct regmap *map);
int regmap_get_max_register(struct regmap *map);
int regmap_get_reg_stride(struct regmap *map);
bool regmap_might_sleep(struct regmap *map);
int regmap_async_complete(struct regmap *map);
bool regmap_can_raw_write(struct regmap *map);
size_t regmap_get_raw_read_max(struct regmap *map);
@ -1905,6 +1906,12 @@ static inline int regmap_get_reg_stride(struct regmap *map)
return -EINVAL;
}
static inline bool regmap_might_sleep(struct regmap *map)
{
WARN_ONCE(1, "regmap API is disabled");
return true;
}
static inline int regcache_sync(struct regmap *map)
{
WARN_ONCE(1, "regmap API is disabled");