From: Marek Vasut <marek.vasut+renesas@mailbox.org>
Date: Sun, 18 Jan 2026 13:49:56 +0000 (+0100)
Subject: arm64: dts: renesas: ulcb: ulcb-kf: Describe PCIe/USB3.0 clock generator
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c3632693cee78b4806496a661f33a0c84f9775e0;p=thirdparty%2Flinux.git

arm64: dts: renesas: ulcb: ulcb-kf: Describe PCIe/USB3.0 clock generator

Describe the 9FGV0841 PCIe and USB3.0 clock generator present on ULCB
boards.  The clock generator supplies 100 MHz differential clock for
both PCIe ports, the USB 3.0 PHY and SATA.

SATA is not yet described in the ULCB DT, therefore the connection to
this clock generator is not described here either.

The H3 ULCB schematic does describe connection from output DIF7 to
USB3S1_CLK_*, but these signals do not exist on the SoC, therefore
this connection is also not described.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260118135038.8033-9-marek.vasut+renesas@mailbox.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---

diff --git a/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi b/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi
index 2a157d1efb3d3..97014bcfbb1d2 100644
--- a/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi
+++ b/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi
@@ -351,20 +351,30 @@
 };
 
 &pcie_bus_clk {
-	clock-frequency = <100000000>;
+	status = "disabled";
 };
 
 &pciec0 {
+	clocks = <&cpg CPG_MOD 319>, <&pcie_usb_clk 1>;
 	status = "okay";
 };
 
+&pciec0_rp {
+	clocks = <&pcie_usb_clk 3>;
+};
+
 &pciec1 {
+	clocks = <&cpg CPG_MOD 318>, <&pcie_usb_clk 2>;
 	status = "okay";
 
 	vpcie1v5-supply = <&pcie_1v5>;
 	vpcie3v3-supply = <&pcie_3v3>;
 };
 
+&pciec1_rp {
+	clocks = <&pcie_usb_clk 4>;
+};
+
 &pfc {
 	can0_pins: can0 {
 		groups = "can0_data_a";
@@ -475,6 +485,15 @@
 	status = "okay";
 };
 
+&usb3_phy0 {
+	clocks = <&cpg CPG_MOD 328>, <&pcie_usb_clk 6>, <&usb_extal_clk>;
+	status = "okay";
+};
+
+&usb3s0_clk {
+	status = "disabled";
+};
+
 &xhci0 {
 	status = "okay";
 };
diff --git a/arch/arm64/boot/dts/renesas/ulcb.dtsi b/arch/arm64/boot/dts/renesas/ulcb.dtsi
index 241caf737abbd..67fd6a65db897 100644
--- a/arch/arm64/boot/dts/renesas/ulcb.dtsi
+++ b/arch/arm64/boot/dts/renesas/ulcb.dtsi
@@ -47,6 +47,12 @@
 		clock-frequency = <12288000>;
 	};
 
+	pcie_usb_refclk: clk-x24 {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <25000000>;
+	};
+
 	hdmi0-out {
 		compatible = "hdmi-connector";
 		type = "a";
@@ -232,6 +238,13 @@
 
 	clock-frequency = <400000>;
 
+	pcie_usb_clk: clk@68 {
+		compatible = "renesas,9fgv0841";
+		reg = <0x68>;
+		clocks = <&pcie_usb_refclk>;
+		#clock-cells = <1>;
+	};
+
 	versaclock5: clock-generator@6a {
 		compatible = "idt,5p49v5925";
 		reg = <0x6a>;