RX8581_REG_FLAG
err = regmap_read(regmap, RX8581_REG_FLAG, &data);
err = regmap_update_bits(regmap, RX8581_REG_FLAG, RX8581_FLAG_VLF, 0);
err = regmap_read(regmap, RX8581_REG_FLAG, &data);
err = regmap_write(regmap, RX8581_REG_FLAG,