SDHCI_OMAP_AC12
reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12);
sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg);
reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12);
ac12 = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12);
reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12);
sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg);
reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12);
sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg);