AD7768_REG_SYNC_RESET
ret = regmap_write(st->regmap, AD7768_REG_SYNC_RESET, 0x3);
ret = regmap_write(st->regmap, AD7768_REG_SYNC_RESET, 0x2);
return regmap_write(st->regmap, AD7768_REG_SYNC_RESET, 0x00);