PHY_SDCLKDL_CNFG_UPDATE
val |= PHY_SDCLKDL_CNFG_UPDATE;
val &= ~(PHY_SDCLKDL_CNFG_UPDATE);
sdhci_writeb(host, PHY_SDCLKDL_CNFG_UPDATE, PHY_SDCLKDL_CNFG_R);
sdhci_writeb(host, PHY_SDCLKDL_CNFG_UPDATE, PHY_SDCLKDL_CNFG_R);
val &= ~(PHY_SDCLKDL_CNFG_UPDATE);