mmc_clk_delay
val = mmc_clk_delay(val, sam, mclk->sam_off, mclk->sam_bits);
val = mmc_clk_delay(val, drv, mclk->drv_off, mclk->drv_bits);
val = mmc_clk_delay(val, div, mclk->div_off, mclk->div_bits);