[V3] arm64: dts: imx8mp-beacon: Configure 100MHz PCIe Ref Clk

Commit Message

Adam Ford Oct. 4, 2023, 11:51 p.m. UTC

There is a I2C controlled 100MHz Reference clock used by the PCIe
controller. Configure this clock's DIF1 output to be used by
the PCIe.

Signed-off-by: Adam Ford <[e-mail]>
Reviewed-by: Fabio Estevam <[e-mail]>
---
V3:  Update node names, clock-xtal25 and clock-generator per Shawn Guo
V2:  Remove the pcie0_refclk clock that the new one replaces.

Comments

Shawn Guo Oct. 10, 2023, 2:25 a.m. UTC | #1

On Wed, Oct 04, 2023 at 06:51:47PM -0500, Adam Ford wrote:
> There is a I2C controlled 100MHz Reference clock used by the PCIe
> controller. Configure this clock's DIF1 output to be used by
> the PCIe.
> 
> Signed-off-by: Adam Ford <[e-mail]>
> Reviewed-by: Fabio Estevam <[e-mail]>

Applied, thanks!

Patch

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-beacon-kit.dts b/arch/arm64/boot/dts/freescale/imx8mp-beacon-kit.dts
index ee64c6ffb551..0bea0798d2db 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-beacon-kit.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-beacon-kit.dts
@@ -23,6 +23,12 @@  chosen {
 		stdout-path = &uart2;
 	};
 
+	clk_xtal25: clock-xtal25 {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <25000000>;
+	};
+
 	connector {
 		compatible = "usb-c-connector";
 		label = "USB-C";
@@ -118,12 +124,6 @@  led-3 {
 		};
 	};
 
-	pcie0_refclk: clock-pcie {
-		compatible = "fixed-clock";
-		#clock-cells = <0>;
-		clock-frequency = <100000000>;
-	};
-
 	reg_audio: regulator-wm8962 {
 		compatible = "regulator-fixed";
 		regulator-name = "3v3_aud";
@@ -273,6 +273,13 @@  pca6416_3: gpio@20 {
 		interrupt-controller;
 		#interrupt-cells = <2>;
 	};
+
+	pcieclk: clock-generator@68 {
+		compatible = "renesas,9fgv0241";
+		reg = <0x68>;
+		clocks = <&clk_xtal25>;
+		#clock-cells = <1>;
+	};
 };
 
 &i2c3 {
@@ -408,8 +415,9 @@  &pcie {
 };
 
 &pcie_phy {
+	fsl,clkreq-unsupported;
 	fsl,refclk-pad-mode = <IMX8_PCIE_REFCLK_PAD_INPUT>;
-	clocks = <&pcie0_refclk>;
+	clocks = <&pcieclk 1>;
 	clock-names = "ref";
 	status = "okay";
 };