[PATCH] regulator: mt6311: Use REGCACHE_RBTREE

From: Daniel Kurtz
Date: Fri Dec 18 2015 - 02:11:33 EST


This regulator is on a slow i2c bus. Register accesses are very simple,
they all either enable/disable a regulator channel, or select a new
voltage level. Thus, reading registers from the device will always
return what was last written.

Therefore we can save a lot of time when reading registers by using a
regmap_cache. Since the register map is relatively large, but we only
ever access a few of them, we use an RBTREE cache.

Signed-off-by: Daniel Kurtz <djkurtz@xxxxxxxxxxxx>
Acked-by: Henry Chen <henryc.chen@xxxxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
---
drivers/regulator/mt6311-regulator.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/regulator/mt6311-regulator.c b/drivers/regulator/mt6311-regulator.c
index 02c4e5feca8e..0495716fd35f 100644
--- a/drivers/regulator/mt6311-regulator.c
+++ b/drivers/regulator/mt6311-regulator.c
@@ -30,6 +30,7 @@ static const struct regmap_config mt6311_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = MT6311_FQMTR_CON4,
+ .cache_type = REGCACHE_RBTREE,
};

/* Default limits measured in millivolts and milliamps */
--
2.6.2

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