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

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  [PATCHv2 2/3] regcache: Introduce the index parsing API by stride order Xiubo Li <lixiubo@cmss.chinamobile.com> - 2016-01-04 11:10 +0100

#1300593 — [PATCHv2 2/3] 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>
---
 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



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