SDHCI_SPRD_CMD_DLY_MASK
dll_dly &= ~SDHCI_SPRD_CMD_DLY_MASK;
dll_dly |= ((i << 8) & SDHCI_SPRD_CMD_DLY_MASK);
p[mmc->ios.timing] &= ~SDHCI_SPRD_CMD_DLY_MASK;
p[mmc->ios.timing] |= ((best_clk_sample << 8) & SDHCI_SPRD_CMD_DLY_MASK);