SDVDD
writel(SDVDD_POWER_OFF, host->ioaddr + SDVDD);
dev_dbg(dev, "SDVDD 0x%08x\n", readl(host->ioaddr + SDVDD));
writel(SDVDD_POWER_OFF, host->ioaddr + SDVDD);
writel(SDVDD_POWER_ON, host->ioaddr + SDVDD);