[PATCH v5 08/39] serial: msm: fix clock handling and pinctrl

[Caleb Connolly]

Use the modern helpers to fetch the clock and use the correct property
("clocks" instead of "clock"). Drop the call to pinctrl_select_state()
as no boards have a "uart" pinctrl state and this prints confusing
errors.

Reviewed-by: Neil Armstrong <neil.armstrong at linaro.org>
Reviewed-by: Sumit Garg <sumit.garg at linaro.org>
Tested-by: Sumit Garg <sumit.garg at linaro.org> #qcs404
Signed-off-by: Caleb Connolly <caleb.connolly at linaro.org>
---
 arch/arm/dts/dragonboard410c.dts |  3 ++-
 arch/arm/dts/dragonboard820c.dts |  3 ++-
 drivers/serial/serial_msm.c      | 25 +++++--------------------
 3 files changed, 9 insertions(+), 22 deletions(-)

diff --git a/arch/arm/dts/dragonboard410c.dts b/arch/arm/dts/dragonboard410c.dts
index 02c824d0226c..c395e6cc0427 100644
--- a/arch/arm/dts/dragonboard410c.dts
+++ b/arch/arm/dts/dragonboard410c.dts
@@ -83,9 +83,10 @@
 
 		serial at 78b0000 {
 			compatible = "qcom,msm-uartdm-v1.4";
 			reg = <0x78b0000 0x200>;
-			clock = <&clkc 4>;
+			clocks = <&clkc 4>;
+			clock-names = "core";
 			pinctrl-names = "uart";
 			pinctrl-0 = <&blsp1_uart>;
 		};
 
diff --git a/arch/arm/dts/dragonboard820c.dts b/arch/arm/dts/dragonboard820c.dts
index 146a0af8aafe..86b7f83d36d6 100644
--- a/arch/arm/dts/dragonboard820c.dts
+++ b/arch/arm/dts/dragonboard820c.dts
@@ -77,9 +77,10 @@
 
 		blsp2_uart2: serial at 75b0000 {
 			compatible = "qcom,msm-uartdm-v1.4", "qcom,msm-uartdm";
 			reg = <0x75b0000 0x1000>;
-			clock = <&gcc 4>;
+			clocks = <&gcc 4>;
+			clock-names = "core";
 			pinctrl-names = "uart";
 			pinctrl-0 = <&blsp8_uart>;
 		};
 
diff --git a/drivers/serial/serial_msm.c b/drivers/serial/serial_msm.c
index 44b93bd7ff21..ac4280c6c4c2 100644
--- a/drivers/serial/serial_msm.c
+++ b/drivers/serial/serial_msm.c
@@ -159,31 +159,16 @@ static const struct dm_serial_ops msm_serial_ops = {
 static int msm_uart_clk_init(struct udevice *dev)
 {
 	uint clk_rate = fdtdec_get_uint(gd->fdt_blob, dev_of_offset(dev),
 					"clock-frequency", 115200);
-	uint clkd[2]; /* clk_id and clk_no */
-	int clk_offset;
-	struct udevice *clk_dev;
 	struct clk clk;
 	int ret;
 
-	ret = fdtdec_get_int_array(gd->fdt_blob, dev_of_offset(dev), "clock",
-				   clkd, 2);
-	if (ret)
-		return ret;
-
-	clk_offset = fdt_node_offset_by_phandle(gd->fdt_blob, clkd[0]);
-	if (clk_offset < 0)
-		return clk_offset;
-
-	ret = uclass_get_device_by_of_offset(UCLASS_CLK, clk_offset, &clk_dev);
-	if (ret)
-		return ret;
-
-	clk.id = clkd[1];
-	ret = clk_request(clk_dev, &clk);
-	if (ret < 0)
+	ret = clk_get_by_name(dev, "core", &clk);
+	if (ret < 0) {
+		pr_warn("%s: Failed to get clock: %d\n", __func__, ret);
 		return ret;
+	}
 
 	ret = clk_set_rate(&clk, clk_rate);
 	if (ret < 0)
 		return ret;
@@ -217,9 +202,8 @@ static int msm_serial_probe(struct udevice *dev)
 	ret = msm_uart_clk_init(dev);
 	if (ret)
 		return ret;
 
-	pinctrl_select_state(dev, "uart");
 	uart_dm_init(priv);
 
 	return 0;
 }
@@ -250,8 +234,9 @@ U_BOOT_DRIVER(serial_msm) = {
 	.of_to_plat = msm_serial_of_to_plat,
 	.priv_auto	= sizeof(struct msm_serial_data),
 	.probe = msm_serial_probe,
 	.ops	= &msm_serial_ops,
+	.flags = DM_FLAG_PRE_RELOC,
 };
 
 #ifdef CONFIG_DEBUG_UART_MSM
 

-- 
2.43.1