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| author | Lars-Peter Clausen <lars@metafoo.de> | 2011-11-16 20:34:04 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-11-17 16:51:27 +0000 |
| commit | b44d48c1ccf70273a91b7d3a920b0b54c3cb314f (patch) | |
| tree | 1208c5fa80a8e0b4f14844914afc76914572eb67 /drivers/base/regmap/regcache.c | |
| parent | 064d4db11e23949c40b8a2f2f6be11c131b53932 (diff) | |
| download | talos-op-linux-b44d48c1ccf70273a91b7d3a920b0b54c3cb314f.tar.gz talos-op-linux-b44d48c1ccf70273a91b7d3a920b0b54c3cb314f.zip | |
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>
Diffstat (limited to 'drivers/base/regmap/regcache.c')
| -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 6d93e49c462f..e21eebd36afa 100644 --- a/drivers/base/regmap/regcache.c +++ b/drivers/base/regmap/regcache.c @@ -199,9 +199,6 @@ 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); |
