diff options
| author | Lars-Peter Clausen <lars@metafoo.de> | 2011-11-16 20:34:04 +0100 |
|---|---|---|
| committer | Lokesh Pathak <lpathak@nvidia.com> | 2012-03-05 07:53:19 -0800 |
| commit | a87d1cd82c3581b50a33ccadaf279e4095bcf47f (patch) | |
| tree | c9baa0c7a309cc970ecdcb5df748f24e8e7c854e | |
| parent | ee046b3308a3245d2693d9cf7c987894476fa6cb (diff) | |
regmap: Drop check whether a register is readable in regcache_read
One of the reasons for using a cache is to have a software shadow of a register
which is writable but not readable. This allows us to do a read-modify-write
operation on such a register.
Currently regcache checks whether a register is readable when performing a
cached read and returns an error if it is not. Drop this check, since it will
prevent us from using the cache for registers where read-back is not possible.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
(cherry picked from commit b44d48c1ccf70273a91b7d3a920b0b54c3cb314f)
Change-Id: Iafe9afea14b09e69f698d71bcd1dd85695cc1ad5
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/87564
| -rw-r--r-- | drivers/base/regmap/regcache.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c index defa41d4344e..1679d12ee803 100644 --- a/drivers/base/regmap/regcache.c +++ b/drivers/base/regmap/regcache.c @@ -198,9 +198,6 @@ int regcache_read(struct regmap *map, BUG_ON(!map->cache_ops); - if (!regmap_readable(map, reg)) - return -EIO; - if (!regmap_volatile(map, reg)) return map->cache_ops->read(map, reg, value); |