The patch regmap: Add a function to check if a regmap register is cached
has been applied to the regmap tree at git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap.git All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark >From 1ea975cf1ef57b1e44c0aec4820f60bb3b60904b Mon Sep 17 00:00:00 2001 From: Cristian Birsan <[email protected]> Date: Mon, 8 Aug 2016 18:44:21 +0300 Subject: [PATCH] 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: Cristian Birsan <[email protected]> Signed-off-by: Mark Brown <[email protected]> --- drivers/base/regmap/internal.h | 1 + drivers/base/regmap/regmap.c | 23 +++++++++++++++++++++++ 2 files changed, 24 insertions(+) diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h index a0380338946a..f4be4c19bb17 100644 --- a/drivers/base/regmap/internal.h +++ b/drivers/base/regmap/internal.h @@ -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); diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 51fa7d66a393..1f011f9d6dcb 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -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) -- 2.8.1
