LTC4282_CTRL_MSB
ret = regmap_read(st->map, LTC4282_CTRL_MSB, ®_val);
ret = regmap_update_bits(st->map, LTC4282_CTRL_MSB,
ret = regmap_update_bits(st->map, LTC4282_CTRL_MSB,
ret = regmap_update_bits(st->map, LTC4282_CTRL_MSB,