From 47769cbc09ebb13ffd1e2d017b698dddf7fd2855 Mon Sep 17 00:00:00 2001 From: Daniel Kurtz Date: Fri, 18 Dec 2015 15:11:33 +0800 Subject: [PATCH] regulator: mt6311: Use REGCACHE_RBTREE 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 Acked-by: Henry Chen Signed-off-by: Mark Brown --- 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 */