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Commit 1ea975cf authored by Cristian Birsan's avatar Cristian Birsan Committed by Mark Brown
Browse files

regmap: Add a function to check if a regmap register is cached 



Add a function to check if a regmap register is cached. This will be used
in debugfs to dump the cached values of write only registers.

Signed-off-by: default avatarCristian Birsan <cristian.birsan@microchip.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 29b4817d

drivers/base/regmap/internal.h

+1 −0
Original line number Diff line number Diff line
@@ -173,6 +173,7 @@ struct regcache_ops { 
	int (*drop)(struct regmap *map, unsigned int min, unsigned int max);

};



bool regmap_cached(struct regmap *map, unsigned int reg);

bool regmap_writeable(struct regmap *map, unsigned int reg);

bool regmap_readable(struct regmap *map, unsigned int reg);

bool regmap_volatile(struct regmap *map, unsigned int reg);

drivers/base/regmap/regmap.c

+23 −0
Original line number Diff line number Diff line
@@ -93,6 +93,29 @@ bool regmap_writeable(struct regmap *map, unsigned int reg) 
	return true;

}



bool regmap_cached(struct regmap *map, unsigned int reg)

{

	int ret;

	unsigned int val;



	if (map->cache == REGCACHE_NONE)

		return false;



	if (!map->cache_ops)

		return false;



	if (map->max_register && reg > map->max_register)

		return false;



	map->lock(map->lock_arg);

	ret = regcache_read(map, reg, &val);

	map->unlock(map->lock_arg);

	if (ret)

		return false;



	return true;

}



bool regmap_readable(struct regmap *map, unsigned int reg)

{

	if (!map->reg_read)