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    Subject[PATCH] cpufreq: mediatek: Use REGCACHE_RBTREE
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    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@chromium.org>
    ---
    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 02c4e5f..0495716 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 */
    --
    2.6.0.rc2.230.g3dd15c0


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