linux-kernel - [PATCH 2/5] arm64: dts: renesas: r9a09g087: Add ETHSS node

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Message-ID: <20251016202129.157614-3-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date: Thu, 16 Oct 2025 21:21:26 +0100
From: Prabhakar <prabhakar.csengg@...il.com>
To: Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>
Cc: linux-renesas-soc@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Prabhakar <prabhakar.csengg@...il.com>,
	Biju Das <biju.das.jz@...renesas.com>,
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [PATCH 2/5] arm64: dts: renesas: r9a09g087: Add ETHSS node

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Add an Ethernet Switch Subsystem (ETHSS) device node to the RZ/N2H
(R9A09G087) SoC. The ETHSS IP block is responsible for handling MII
pass-through or conversion to RMII/RGMII.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
---
 arch/arm64/boot/dts/renesas/r9a09g087.dtsi | 37 ++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r9a09g087.dtsi b/arch/arm64/boot/dts/renesas/r9a09g087.dtsi
index 2d2db858f48f..882570622486 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g087.dtsi
+++ b/arch/arm64/boot/dts/renesas/r9a09g087.dtsi
@@ -270,6 +270,43 @@ i2c2: i2c@...08000 {
 			status = "disabled";
 		};
 
+		ethss: ethss@...10000 {
+			compatible = "renesas,r9a09g087-miic", "renesas,r9a09g077-miic";
+			reg =  <0 0x80110000 0 0x10000>;
+			clocks = <&cpg CPG_CORE R9A09G087_ETCLKE>,
+				 <&cpg CPG_CORE R9A09G087_ETCLKB>,
+				 <&cpg CPG_CORE R9A09G087_ETCLKD>,
+				 <&cpg CPG_MOD 403>;
+			clock-names = "mii_ref", "rgmii_ref", "rmii_ref", "hclk";
+			resets = <&cpg 405>, <&cpg 406>;
+			reset-names = "rst", "crst";
+			power-domains = <&cpg>;
+			status = "disabled";
+
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			mii_conv0: mii-conv@0 {
+				reg = <0>;
+				status = "disabled";
+			};
+
+			mii_conv1: mii-conv@1 {
+				reg = <1>;
+				status = "disabled";
+			};
+
+			mii_conv2: mii-conv@2 {
+				reg = <2>;
+				status = "disabled";
+			};
+
+			mii_conv3: mii-conv@3 {
+				reg = <3>;
+				status = "disabled";
+			};
+		};
+
 		cpg: clock-controller@...80000 {
 			compatible = "renesas,r9a09g087-cpg-mssr";
 			reg = <0 0x80280000 0 0x1000>,
-- 
2.43.0