[PATCHv2 2/3] regcache: Introduce the index parsing API by stride order

[Xiubo Li]

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@xxxxxxxxxxxxxxxxxxxx>
---
 drivers/base/regmap/internal.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
index c22b04b..5c79526 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
-- 
1.8.3.1



--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/