mmc_omap_fclk_enable
mmc_omap_fclk_enable(host, 1);
mmc_omap_fclk_enable(host, 0);
mmc_omap_fclk_enable(host, 1);
mmc_omap_fclk_enable(host, 0);
mmc_omap_fclk_enable(host, 0);
mmc_omap_fclk_enable(host, 0);