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Subject[PATCH v6 5/9] regmap: Introduces regmap lock helpers
Date
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
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