Until now, the mmc clock was left in a good enough state by the ROM code to be used by the controller. However on some SoC, if the ROM code finds a bootloader on USB or SPI, it might leave the MMC clock in state the controller cannot work with.
Enable the input clocks provided to the mmc controller. While the u-boot mmc controller driver is not doing fancy settings like the Linux, it at least needs to make these clocks are running.
Reviewed-by: Neil Armstrong narmstrong@baylibre.com Signed-off-by: Jerome Brunet jbrunet@baylibre.com --- drivers/mmc/meson_gx_mmc.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/meson_gx_mmc.c b/drivers/mmc/meson_gx_mmc.c index 031cc79ccb1f..7060f15787f6 100644 --- a/drivers/mmc/meson_gx_mmc.c +++ b/drivers/mmc/meson_gx_mmc.c @@ -4,6 +4,7 @@ */
#include <common.h> +#include <clk.h> #include <dm.h> #include <fdtdec.h> #include <malloc.h> @@ -240,12 +241,23 @@ static int meson_mmc_probe(struct udevice *dev) struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev); struct mmc *mmc = &pdata->mmc; struct mmc_config *cfg = &pdata->cfg; + struct clk_bulk clocks; uint32_t val; + int ret; + #ifdef CONFIG_PWRSEQ struct udevice *pwr_dev; - int ret; #endif
+ /* Enable the clocks feeding the MMC controller */ + ret = clk_get_bulk(dev, &clocks); + if (ret) + return ret; + + ret = clk_enable_bulk(&clocks); + if (ret) + return ret; + cfg->voltages = MMC_VDD_33_34 | MMC_VDD_32_33 | MMC_VDD_31_32 | MMC_VDD_165_195; cfg->host_caps = MMC_MODE_8BIT | MMC_MODE_4BIT |