| Message ID | 20211224041352.29405-6-quan@os.amperecomputing.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | Add Ampere's Altra SMPro MFD and its child drivers | expand |
On Fri, Dec 24, 2021 at 11:13:48AM +0700, Quan Nguyen wrote: > This commit introduces regmap_acquire/release_lock() functions and makes > them available for drivers that need atomic access of regmap registers You've not explained what something would need this for and how it's expected to work - we don't provide unlocked access to the regmap to client drivers so I don't see how one could safely use this. It's unclear to me what this would mean or why it's not better implemented in the client driver.
On 24/12/2021 20:19, Mark Brown wrote: > On Fri, Dec 24, 2021 at 11:13:48AM +0700, Quan Nguyen wrote: >> This commit introduces regmap_acquire/release_lock() functions and makes >> them available for drivers that need atomic access of regmap registers > > You've not explained what something would need this for and how > it's expected to work - we don't provide unlocked access to the > regmap to client drivers so I don't see how one could safely use > this. It's unclear to me what this would mean or why it's not > better implemented in the client driver. Thanks a lot for the review, Mark. As per my comment in the other email, this code will be removed in my next version. Thanks, - Quan
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,
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(+)