[PATCH v5 2/5] serial: lpuart: use ipg clk for i.MX7ULP

[Peng Fan (OSS)]

From: Peng Fan <peng.fan at nxp.com>

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 at nxp.com>
---
 drivers/serial/serial_lpuart.c | 28 +++++++++++++++++++---------
 1 file changed, 19 insertions(+), 9 deletions(-)

diff --git a/drivers/serial/serial_lpuart.c b/drivers/serial/serial_lpuart.c
index ce08a6b4486..891352293f9 100644
--- a/drivers/serial/serial_lpuart.c
+++ b/drivers/serial/serial_lpuart.c
@@ -111,11 +111,18 @@ u32 __weak get_lpuart_clk(void)
 #if CONFIG_IS_ENABLED(CLK)
 static int get_lpuart_clk_rate(struct udevice *dev, u32 *clk)
 {
+	struct lpuart_serial_plat *plat = dev_get_plat(dev);
 	struct clk per_clk;
 	ulong rate;
 	int ret;
+	char *name;
+
+	if (plat->devtype == DEV_MX7ULP)
+		name = "ipg";
+	else
+		name = "per";
 
-	ret = clk_get_by_name(dev, "per", &per_clk);
+	ret = clk_get_by_name(dev, name, &per_clk);
 	if (ret) {
 		dev_err(dev, "Failed to get per clk: %d\n", ret);
 		return ret;
@@ -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);

-- 
2.35.3