From 6eb0f5e0154facfe4f0acdb9f474cde773319efc Mon Sep 17 00:00:00 2001 From: Dimitris Papastamos Date: Thu, 29 Sep 2011 14:36:27 +0100 Subject: [PATCH] regmap: Implement regcache_cache_bypass helper function Ensure we've got a function so users can enable/disable the cache bypass option. Signed-off-by: Dimitris Papastamos Signed-off-by: Mark Brown --- drivers/base/regmap/regcache.c | 19 +++++++++++++++++++ include/linux/regmap.h | 1 + 2 files changed, 20 insertions(+) diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c index 5dbc5076267e..876622453cd8 100644 --- a/drivers/base/regmap/regcache.c +++ b/drivers/base/regmap/regcache.c @@ -286,6 +286,25 @@ void regcache_cache_only(struct regmap *map, bool enable) } EXPORT_SYMBOL_GPL(regcache_cache_only); +/** + * regcache_cache_bypass: Put a register map into cache bypass mode + * + * @map: map to configure + * @cache_only: flag if changes should not be written to the hardware + * + * When a register map is marked with the cache bypass option, writes + * to the register map API will only update the hardware and not the + * the cache directly. This is useful when syncing the cache back to + * the hardware. + */ +void regcache_cache_bypass(struct regmap *map, bool enable) +{ + mutex_lock(&map->lock); + map->cache_bypass = enable; + mutex_unlock(&map->lock); +} +EXPORT_SYMBOL_GPL(regcache_cache_bypass); + bool regcache_set_val(void *base, unsigned int idx, unsigned int val, unsigned int word_size) { diff --git a/include/linux/regmap.h b/include/linux/regmap.h index 76ac255a17a5..3daac2d8dc37 100644 --- a/include/linux/regmap.h +++ b/include/linux/regmap.h @@ -142,5 +142,6 @@ int regmap_update_bits(struct regmap *map, unsigned int reg, int regcache_sync(struct regmap *map); void regcache_cache_only(struct regmap *map, bool enable); +void regcache_cache_bypass(struct regmap *map, bool enable); #endif -- 2.20.1