[U-Boot] [PATCH v2] mmc: rockchip_sdhci: add clock init for mmc

[Kever Yang]

Init the clock rate to CONFIG_ROCKCHIP_SDHCI_MAX_FREQ with clock driver
api.

Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
---

Changes in v2:
- using the return value

 drivers/mmc/rockchip_sdhci.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/mmc/rockchip_sdhci.c b/drivers/mmc/rockchip_sdhci.c
index c56e1a3..c37c697 100644
--- a/drivers/mmc/rockchip_sdhci.c
+++ b/drivers/mmc/rockchip_sdhci.c
@@ -12,6 +12,7 @@
 #include <libfdt.h>
 #include <malloc.h>
 #include <sdhci.h>
+#include <clk.h>
 
 /* 400KHz is max freq for card ID etc. Use that as min */
 #define EMMC_MIN_FREQ	400000
@@ -33,6 +34,16 @@ static int arasan_sdhci_probe(struct udevice *dev)
 	struct rockchip_sdhc *prv = dev_get_priv(dev);
 	struct sdhci_host *host = &prv->host;
 	int ret;
+	struct clk clk;
+
+	ret = clk_get_by_index(dev, 0, &clk);
+	if (!ret) {
+		ret = clk_set_rate(&clk, CONFIG_ROCKCHIP_SDHCI_MAX_FREQ);
+		if (IS_ERR_VALUE(ret))
+			printf("%s clk set rate fail!\n", __func__);
+	} else {
+		printf("%s fail to get clk\n", __func__)
+	}
 
 	host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD;
 
-- 
1.9.1