MMC_TIMING_SD_EXP
return host->ios.timing == MMC_TIMING_SD_EXP ||
host->ios.timing = MMC_TIMING_SD_EXP;
mmc->ios.timing &= ~(MMC_TIMING_SD_EXP | MMC_TIMING_SD_EXP_1_2V);
mmc->ios.timing &= ~(MMC_TIMING_SD_EXP | MMC_TIMING_SD_EXP_1_2V);