SDHCI_TEGRA_AUTO_CAL_CONFIG
reg = sdhci_readl(host, SDHCI_TEGRA_AUTO_CAL_CONFIG);
sdhci_writel(host, reg, SDHCI_TEGRA_AUTO_CAL_CONFIG);
reg = sdhci_readl(host, SDHCI_TEGRA_AUTO_CAL_CONFIG);
sdhci_writel(host, reg, SDHCI_TEGRA_AUTO_CAL_CONFIG);
reg = sdhci_readl(host, SDHCI_TEGRA_AUTO_CAL_CONFIG);
sdhci_writel(host, reg, SDHCI_TEGRA_AUTO_CAL_CONFIG);