[U-Boot] [PATCH V2 30/32] mmc: fsl_esdhc: add uclass clk support

[Peng Fan]

When CONIFG_CLK is enabled, use uclass clk api to handle
the clock.

Signed-off-by: Peng Fan <peng....@nxp.com>
Cc: Jaehoon Chung <jh80.ch...@samsung.com>
Cc: Stefano Babic <sba...@denx.de>
---
 drivers/mmc/fsl_esdhc.c | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c
index 785b9e87a6..283b03bf0f 100644
--- a/drivers/mmc/fsl_esdhc.c
+++ b/drivers/mmc/fsl_esdhc.c
@@ -11,6 +11,7 @@
 #include <config.h>
 #include <common.h>
 #include <command.h>
+#include <clk.h>
 #include <errno.h>
 #include <hwconfig.h>
 #include <mmc.h>
@@ -121,6 +122,7 @@ struct esdhc_soc_data {
 struct fsl_esdhc_priv {
        struct fsl_esdhc *esdhc_regs;
        unsigned int sdhc_clk;
+       struct clk per_clk;
        unsigned int clock;
        unsigned int mode;
        unsigned int bus_width;
@@ -1462,10 +1464,22 @@ static int fsl_esdhc_probe(struct udevice *dev)
 
        init_clk_usdhc(dev->seq);
 
-       priv->sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK + dev->seq);
-       if (priv->sdhc_clk <= 0) {
-               dev_err(dev, "Unable to get clk for %s\n", dev->name);
-               return -EINVAL;
+       if (IS_ENABLED(CONFIG_CLK)) {
+               /* Assigned clock already set clock */
+               ret = clk_get_by_name(dev, "per", &priv->per_clk);
+               if (ret)
+                       printf("Failed to get per_clk\n");
+               ret = clk_enable(&priv->per_clk);
+               if (ret)
+                       printf("Failed to enable per_clk\n");
+
+               priv->sdhc_clk = clk_get_rate(&priv->per_clk);
+       } else {
+               priv->sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK + dev->seq);
+               if (priv->sdhc_clk <= 0) {
+                       dev_err(dev, "Unable to get clk for %s\n", dev->name);
+                       return -EINVAL;
+               }
        }
 
        ret = fsl_esdhc_init(priv, plat);
-- 
2.14.1

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