SDHCI_SDR50_NEEDS_TUNING
host->flags & SDHCI_SDR50_NEEDS_TUNING)
host->flags & SDHCI_SDR50_NEEDS_TUNING) {
if (host->flags & SDHCI_SDR50_NEEDS_TUNING)
host->flags |= SDHCI_SDR50_NEEDS_TUNING;