SDMMC_CMD_UPD_CLK
u32 sdmmc_cmd_bits = SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT;
mci_send_cmd(slot, SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT,
mci_send_cmd(host->slot, SDMMC_CMD_UPD_CLK, 0);
mci_send_cmd(slot, SDMMC_CMD_UPD_CLK |