SDMMC_CLKSEL_TIMING
priv->sdr_timing = SDMMC_CLKSEL_TIMING(timing[0], timing[1], div);
priv->ddr_timing = SDMMC_CLKSEL_TIMING(timing[0], timing[1], div);
priv->hs400_timing = SDMMC_CLKSEL_TIMING(timing[0], timing[1],
#define SDMMC_CLKSEL_TIMING_MASK SDMMC_CLKSEL_TIMING(0x7, 0x7, 0x7)