SDMMC_SDCLK_400K
freq = SDMMC_SDCLK_400K;
mesongx_mmc_bus_clock(sc, SDMMC_SDCLK_400K, false);
saa.saa_clkmin = SDMMC_SDCLK_400K;
saa.saa_clkmin = SDMMC_SDCLK_400K;
case SDMMC_SDCLK_400K:
error = sdmmc_chip_bus_clock(sc->sc_sct, sc->sc_sch, SDMMC_SDCLK_400K,