[PATCH v2 2/6] mmc: meson-gx: enable input clocks

[Jerome Brunet]

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 at baylibre.com>
Signed-off-by: Jerome Brunet <jbrunet at 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 |
-- 
2.24.1