2023-10-04 23:52:30

by Adam Ford

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

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 <[email protected]>
Reviewed-by: Fabio Estevam <[email protected]>
---
V3: Update node names, clock-xtal25 and clock-generator per Shawn Guo
V2: Remove the pcie0_refclk clock that the new one replaces.


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";
};
--
2.40.1

2023-10-10 02:25:45

by Shawn Guo

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

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 <[email protected]>
> Reviewed-by: Fabio Estevam <[email protected]>

Applied, thanks!