From: Markus Stockhausen <markus.stockhausen@gmx.de>
Date: Mon, 8 Sep 2025 05:51:21 +0000 (-0400)
Subject: realtek: dts: add mdio controller device nodes
X-Git-Tag: v25.12.0-rc1~1308
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=13b6c62b758612256c5379c88a4171bcfe7049f3;p=thirdparty%2Fopenwrt.git

realtek: dts: add mdio controller device nodes

Until now the mdio bus is a subnode of the ethernet device. This
coupling is different from upstream and wrong. Ethernet and mdio
are different devices. Additionally differentiate between mdio
controller and mdio bus. To make it clear:

- There is one mdio controller
- With up to 4 busses (on RTL93xx)

Prepare new mdio controller and bus nodes with SoC specific compatibles.
These will be used later when refactoring the mdio driver probing.

Remark! For now only define the first bus for the RTL93xx targets.
So the driver still relies on "rtl9300,smi-address = <x y>;". It will
need much more refactoring to get totally aligned with upstream.

Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/19986
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---

diff --git a/target/linux/realtek/dts/rtl838x.dtsi b/target/linux/realtek/dts/rtl838x.dtsi
index 2b9938899b7..f4b629033b2 100644
--- a/target/linux/realtek/dts/rtl838x.dtsi
+++ b/target/linux/realtek/dts/rtl838x.dtsi
@@ -203,6 +203,18 @@
 		compatible = "syscon", "simple-mfd";
 		reg = <0x1b000000 0x10000>;
 
+		mdio_ctrl: mdio-controller {
+			compatible = "realtek,rtl8380-mdio", "realtek,otto-mdio";
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			mdio_bus0: mdio-bus@0 {
+				reg = <0>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+			};
+		};
+
 		mdio_aux: mdio-aux {
 			compatible = "realtek,rtl8380-aux-mdio";
 			#address-cells = <1>;
diff --git a/target/linux/realtek/dts/rtl839x.dtsi b/target/linux/realtek/dts/rtl839x.dtsi
index 24b178c7238..256ee0bc305 100644
--- a/target/linux/realtek/dts/rtl839x.dtsi
+++ b/target/linux/realtek/dts/rtl839x.dtsi
@@ -211,6 +211,18 @@
 		compatible = "syscon", "simple-mfd";
 		reg = <0x1b000000 0x10000>;
 
+		mdio_ctrl: mdio-controller {
+			compatible = "realtek,rtl8392-mdio", "realtek,otto-mdio";
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			mdio_bus0: mdio-bus@0 {
+				reg = <0>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+			};
+		};
+
 		mdio_aux: mdio-aux {
 			compatible = "realtek,rtl8390-aux-mdio";
 			#address-cells = <1>;
diff --git a/target/linux/realtek/dts/rtl930x.dtsi b/target/linux/realtek/dts/rtl930x.dtsi
index 312cc77956d..13c6fad5a11 100644
--- a/target/linux/realtek/dts/rtl930x.dtsi
+++ b/target/linux/realtek/dts/rtl930x.dtsi
@@ -179,6 +179,18 @@
 			status = "disabled";
 		};
 
+		mdio_ctrl: mdio-controller {
+			compatible = "realtek,rtl9301-mdio", "realtek,otto-mdio";
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			mdio_bus0: mdio-bus@0 {
+				reg = <0>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+			};
+		};
+
 		mdio_aux: mdio-aux {
 			compatible = "realtek,rtl9300-aux-mdio";
 			#address-cells = <1>;
diff --git a/target/linux/realtek/dts/rtl931x.dtsi b/target/linux/realtek/dts/rtl931x.dtsi
index c048485c1bc..27f12df2b80 100644
--- a/target/linux/realtek/dts/rtl931x.dtsi
+++ b/target/linux/realtek/dts/rtl931x.dtsi
@@ -211,6 +211,18 @@
 			status = "disabled";
 		};
 
+		mdio_ctrl: mdio-controller {
+			compatible = "realtek,rtl9311-mdio", "realtek,otto-mdio";
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			mdio_bus0: mdio-bus@0 {
+				reg = <0>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+			};
+		};
+
 		mdio_aux: mdio-aux {
 			compatible = "realtek,rtl9310-aux-mdio";
 			#address-cells = <1>;