ESDHC_SDCLKCTL
val = sdhci_readl(host, ESDHC_SDCLKCTL);
sdhci_writel(host, val, ESDHC_SDCLKCTL);
temp = sdhci_readl(host, ESDHC_SDCLKCTL);
sdhci_writel(host, temp | ESDHC_CMD_CLK_CTL, ESDHC_SDCLKCTL);