ESDHC_TUNING_CTRL
tuning_ctrl = readl(host->ioaddr + ESDHC_TUNING_CTRL);
writel(tuning_ctrl, host->ioaddr + ESDHC_TUNING_CTRL);
tmp = readl(host->ioaddr + ESDHC_TUNING_CTRL);
writel(tmp, host->ioaddr + ESDHC_TUNING_CTRL);
tmp = readl(host->ioaddr + ESDHC_TUNING_CTRL);
writel(tmp, host->ioaddr + ESDHC_TUNING_CTRL);
reg = readl(host->ioaddr + ESDHC_TUNING_CTRL);
writel(reg, host->ioaddr + ESDHC_TUNING_CTRL);