[PATCH v6 5/9] regmap: Introduces regmap lock helpers
From: Quan Nguyen <quan@os.amperecomputing.com>
Date: 2021-12-24 04:15:27
Also in:
linux-aspeed, linux-doc, linux-hwmon, lkml, openbmc
Subsystem:
driver core, kobjects, debugfs and sysfs, register map abstraction, the rest · Maintainers:
Greg Kroah-Hartman, "Rafael J. Wysocki", Danilo Krummrich, Mark Brown, Linus Torvalds
This commit introduces regmap_acquire/release_lock() functions and makes them available for drivers that need atomic access of regmap registers Signed-off-by: Quan Nguyen <quan@os.amperecomputing.com> --- Change in v6: + First introduced in v6 [Quan] drivers/base/regmap/regmap.c | 12 ++++++++++++ include/linux/regmap.h | 2 ++ 2 files changed, 14 insertions(+)
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 2d74f9f82aa9..36921309725b 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c@@ -87,6 +87,18 @@ bool regmap_check_range_table(struct regmap *map, unsigned int reg, } EXPORT_SYMBOL_GPL(regmap_check_range_table); +void regmap_acquire_lock(struct regmap *map) +{ + map->lock(map->lock_arg); +} +EXPORT_SYMBOL_GPL(regmap_acquire_lock); + +void regmap_release_lock(struct regmap *map) +{ + map->unlock(map->lock_arg); +} +EXPORT_SYMBOL_GPL(regmap_release_lock); + bool regmap_writeable(struct regmap *map, unsigned int reg) { if (map->max_register && reg > map->max_register)
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 22652e5fbc38..0ed12e6ad4fb 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h@@ -1194,6 +1194,8 @@ 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); size_t regmap_get_raw_write_max(struct regmap *map); +void regmap_acquire_lock(struct regmap *map); +void regmap_release_lock(struct regmap *map); int regcache_sync(struct regmap *map); int regcache_sync_region(struct regmap *map, unsigned int min,
--
2.28.0