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: Cristian Birsan <[email protected]> --- drivers/base/regmap/internal.h | 1 + drivers/base/regmap/regmap.c | 14 ++++++++++++++ 2 files changed, 15 insertions(+) diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h index 3df9770..cae04f4 100644 --- a/drivers/base/regmap/internal.h +++ b/drivers/base/regmap/internal.h @@ -171,6 +171,7 @@ 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); diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 4ac63c0..e07f3a9 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -92,6 +92,20 @@ bool regmap_writeable(struct regmap *map, unsigned int reg) return true; } +bool regmap_cached(struct regmap *map, unsigned int reg) +{ + if (map->cache == REGCACHE_NONE) + return false; + + if (!map->cache_ops) + return false; + + if (map->max_register && reg > map->max_register) + return false; + + return true; +} + bool regmap_readable(struct regmap *map, unsigned int reg) { if (!map->reg_read) -- 1.9.1
