serial: lpuart: use ipg clk for i.MX7ULP

To i.MX7ULP compatible lpuart, there is only ipg clk, no per clk.
So add a devtype check for i.MX7ULP.

Signed-off-by: Peng Fan <peng.fan@nxp.com>

diff --git a/drivers/serial/serial_lpuart.c b/drivers/serial/serial_lpuart.c
index ce08a6b4486c9e441a51092d69b94c3f3b60baee..3f2be72b830240fee20b8745dc5f29aec9fae57e 100644 (file)
--- a/drivers/serial/serial_lpuart.c
+++ b/drivers/serial/serial_lpuart.c
@@ -109,28 +109,35 @@ u32 __weak get_lpuart_clk(void)
 }
 
 #if CONFIG_IS_ENABLED(CLK)
-static int get_lpuart_clk_rate(struct udevice *dev, u32 *clk)
+static int get_lpuart_clk_rate(struct udevice *dev, u32 *clk_rate)
 {
-       struct clk per_clk;
+       struct lpuart_serial_plat *plat = dev_get_plat(dev);
+       struct clk clk;
        ulong rate;
        int ret;
+       char *name;
 
-       ret = clk_get_by_name(dev, "per", &per_clk);
+       if (plat->devtype == DEV_MX7ULP)
+               name = "ipg";
+       else
+               name = "per";
+
+       ret = clk_get_by_name(dev, name, &clk);
        if (ret) {
-               dev_err(dev, "Failed to get per clk: %d\n", ret);
+               dev_err(dev, "Failed to get clk: %d\n", ret);
                return ret;
        }
 
-       rate = clk_get_rate(&per_clk);
+       rate = clk_get_rate(&clk);
        if ((long)rate <= 0) {
-               dev_err(dev, "Failed to get per clk rate: %ld\n", (long)rate);
+               dev_err(dev, "Failed to get clk rate: %ld\n", (long)rate);
                return ret;
        }
-       *clk = rate;
+       *clk_rate = rate;
        return 0;
 }
 #else
-static inline int get_lpuart_clk_rate(struct udevice *dev, u32 *clk)
+static inline int get_lpuart_clk_rate(struct udevice *dev, u32 *clk_rate)
 { return -ENOSYS; }
 #endif
 
@@ -479,19 +486,22 @@ static int lpuart_serial_pending(struct udevice *dev, bool input)
 static int lpuart_serial_probe(struct udevice *dev)
 {
 #if CONFIG_IS_ENABLED(CLK)
+       struct lpuart_serial_plat *plat = dev_get_plat(dev);
        struct clk per_clk;
        struct clk ipg_clk;
        int ret;
 
-       ret = clk_get_by_name(dev, "per", &per_clk);
-       if (!ret) {
-               ret = clk_enable(&per_clk);
-               if (ret) {
-                       dev_err(dev, "Failed to enable per clk: %d\n", ret);
-                       return ret;
+       if (plat->devtype != DEV_MX7ULP) {
+               ret = clk_get_by_name(dev, "per", &per_clk);
+               if (!ret) {
+                       ret = clk_enable(&per_clk);
+                       if (ret) {
+                               dev_err(dev, "Failed to enable per clk: %d\n", ret);
+                               return ret;
+                       }
+               } else {
+                       debug("%s: Failed to get per clk: %d\n", __func__, ret);
                }
-       } else {
-               debug("%s: Failed to get per clk: %d\n", __func__, ret);
        }
 
        ret = clk_get_by_name(dev, "ipg", &ipg_clk);