SDMMC_STS2
writeb(0xFF, priv->sdmmc_base + SDMMC_STS2);
status2 = readb(priv->sdmmc_base + SDMMC_STS2);
writeb(status2, priv->sdmmc_base + SDMMC_STS2);
reg_tmp = readb(priv->sdmmc_base + SDMMC_STS2);
writeb(reg_tmp | STS2_DIS_FORCECLK, priv->sdmmc_base + SDMMC_STS2);