diff options
Diffstat (limited to 'drivers/mmc/rockchip_dw_mmc.c')
| -rw-r--r-- | drivers/mmc/rockchip_dw_mmc.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/mmc/rockchip_dw_mmc.c b/drivers/mmc/rockchip_dw_mmc.c index 573bf16c875..3661ce33143 100644 --- a/drivers/mmc/rockchip_dw_mmc.c +++ b/drivers/mmc/rockchip_dw_mmc.c @@ -41,6 +41,14 @@ static uint rockchip_dwmmc_get_mmc_clk(struct dwmci_host *host, uint freq) struct rockchip_dwmmc_priv *priv = dev_get_priv(dev); int ret; + /* + * The clock frequency chosen here affects CLKDIV in the dw_mmc core. + * That can be either 0 or 1, but it must be set to 1 for eMMC DDR52 + * 8-bit mode. It will be set to 0 for all other modes. + */ + if (host->mmc->selected_mode == MMC_DDR_52 && host->mmc->bus_width == 8) + freq *= 2; + ret = clk_set_rate(&priv->clk, freq); if (ret < 0) { debug("%s: err=%d\n", __func__, ret); |