SN_DPPLL_SRC_REG
ret = regmap_read_poll_timeout(pdata->regmap, SN_DPPLL_SRC_REG, val,
regmap_update_bits(pdata->regmap, SN_DPPLL_SRC_REG, REFCLK_FREQ_MASK,
regmap_read(pdata->regmap, SN_DPPLL_SRC_REG, &val);