iio: chemical: atlas-ph-sensor: switch regmap cache

switch from using REGCACHE_FLAT to REGCACHE_RBTREE so initial hw values
are read from device. This also allows some volatile ranges to be
dropped.

Note that REGCACHE_FLAT is intended only for very low lag cases so doesn't
do nice things like read initial values from the device.  Hence this change.

Signed-off-by: Matt Ranostay <mranostay@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/drivers/iio/chemical/atlas-ph-sensor.c b/drivers/iio/chemical/atlas-ph-sensor.c
index 06cd49cbfae1afe8a2c2d64b493b93f04072bde1..71c8e02ea48af8e7358f98f0a7f7eb5a3eea7abf 100644 (file)
--- a/drivers/iio/chemical/atlas-ph-sensor.c
+++ b/drivers/iio/chemical/atlas-ph-sensor.c
@@ -65,8 +65,6 @@ struct atlas_data {
 
 static const struct regmap_range atlas_volatile_ranges[] = {
        regmap_reg_range(ATLAS_REG_INT_CONTROL, ATLAS_REG_INT_CONTROL),
-       regmap_reg_range(ATLAS_REG_CALIB_STATUS, ATLAS_REG_CALIB_STATUS),
-       regmap_reg_range(ATLAS_REG_TEMP_DATA, ATLAS_REG_TEMP_DATA + 4),
        regmap_reg_range(ATLAS_REG_PH_DATA, ATLAS_REG_PH_DATA + 4),
 };
 
@@ -83,7 +81,7 @@ static const struct regmap_config atlas_regmap_config = {
 
        .volatile_table = &atlas_volatile_table,
        .max_register = ATLAS_REG_PH_DATA + 4,
-       .cache_type = REGCACHE_FLAT,
+       .cache_type = REGCACHE_RBTREE,
 };
 
 static const struct iio_chan_spec atlas_channels[] = {