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| author | Xiubo Li <lixiubo@cmss.chinamobile.com> | 2016-01-04 13:00:34 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-02-19 19:12:11 +0300 |
| commit | 8b31ec5572f812acac36f3d02944ade76a8f51b9 (patch) | |
| tree | 70467c764e55d4eaea56776491b6f3403fcba481 /drivers/base/regmap | |
| parent | ca747be22fa57bbee50e34c220401160e8f2a07f (diff) | |
| download | linux-8b31ec5572f812acac36f3d02944ade76a8f51b9.tar.xz | |
regcache: Introduce the index parsing API by stride order
Here introduces regcache_get_index_by_order() for regmap cache,
which uses the register stride order and bit rotation, to improve
the performance.
Signed-off-by: Xiubo Li <lixiubo@cmss.chinamobile.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/base/regmap')
| -rw-r--r-- | drivers/base/regmap/internal.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h index c22b04b2ca17..5c79526245c2 100644 --- a/drivers/base/regmap/internal.h +++ b/drivers/base/regmap/internal.h @@ -273,4 +273,10 @@ static inline unsigned int regmap_get_offset(const struct regmap *map, return index * map->reg_stride; } +static inline unsigned int regcache_get_index_by_order(const struct regmap *map, + unsigned int reg) +{ + return reg >> map->reg_stride_order; +} + #endif |