[PATCH net-next RFC v3 0/4] riscv: dts: sophgo: Add ethernet support for cv18xx

[PATCH net-next RFC v3 0/4] riscv: dts: sophgo: Add ethernet support for cv18xx

[Inochi Amaoto]

Add device binding and dts for CV18XX series SoC, this dts change series
required the reset patch [1] for the dts.

[1] https://lore.kernel.org/all/20250617070144.1149926-1-inochiama@gmail.com

Change from RFC v2:
- https://lore.kernel.org/all/20250623003049.574821-1-inochiama@gmail.com
1. patch 1: fix wrong binding title
2. patch 3: fix unmatched mdio bus number
3. patch 4: remove setting phy-mode and phy-handle in board dts and move
	    them into patch 3.

Change from RFC v1:
- https://lore.kernel.org/all/20250611080709.1182183-1-inochiama@gmail.com
1. patch 3: switch to mdio-mux-mmioreg
2. patch 4: add configuration for Huashan Pi

Inochi Amaoto (4):
  dt-bindings: net: Add support for Sophgo CV1800 dwmac
  riscv: dts: sophgo: Add ethernet device for cv18xx
  riscv: dts: sophgo: Add mdio multiplexer device for cv18xx
  riscv: dts: sophgo: Enable ethernet device for Huashan Pi

 .../bindings/net/sophgo,cv1800b-dwmac.yaml    | 113 ++++++++++++++++++
 arch/riscv/boot/dts/sophgo/cv180x.dtsi        |  73 +++++++++++
 .../boot/dts/sophgo/cv1812h-huashan-pi.dts    |   8 ++
 3 files changed, 194 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/sophgo,cv1800b-dwmac.yaml

--
2.50.0

[PATCH net-next RFC v3 1/4] dt-bindings: net: Add support for Sophgo CV1800 dwmac

[Inochi Amaoto]

The GMAC IP on CV1800 series SoC is a standard Synopsys
DesignWare MAC (version 3.70a).

Add necessary compatible string for this device.

Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
---
 .../bindings/net/sophgo,cv1800b-dwmac.yaml    | 113 ++++++++++++++++++
 1 file changed, 113 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/sophgo,cv1800b-dwmac.yaml

diff --git a/Documentation/devicetree/bindings/net/sophgo,cv1800b-dwmac.yaml b/Documentation/devicetree/bindings/net/sophgo,cv1800b-dwmac.yaml
new file mode 100644
index 000000000000..8abd2cf06e2c
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/sophgo,cv1800b-dwmac.yaml
@@ -0,0 +1,113 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/sophgo,cv1800b-dwmac.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sophgo CV1800B DWMAC glue layer
+
+maintainers:
+  - Inochi Amaoto <inochiama@gmail.com>
+
+select:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - sophgo,cv1800b-dwmac
+  required:
+    - compatible
+
+properties:
+  compatible:
+    items:
+      - const: sophgo,cv1800b-dwmac
+      - const: snps,dwmac-3.70a
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: GMAC main clock
+      - description: PTP clock
+
+  clock-names:
+    items:
+      - const: stmmaceth
+      - const: ptp_ref
+
+  interrupts:
+    maxItems: 1
+
+  interrupt-names:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  reset-names:
+    const: stmmaceth
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - interrupts
+  - interrupt-names
+  - resets
+  - reset-names
+
+allOf:
+  - $ref: snps,dwmac.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    ethernet@4070000 {
+      compatible = "sophgo,cv1800b-dwmac", "snps,dwmac-3.70a";
+      reg = <0x04070000 0x10000>;
+      clocks = <&clk 35>, <&clk 36>;
+      clock-names = "stmmaceth", "ptp_ref";
+      interrupts = <31 IRQ_TYPE_LEVEL_HIGH>;
+      interrupt-names = "macirq";
+      resets = <&rst 12>;
+      reset-names = "stmmaceth";
+      rx-fifo-depth = <8192>;
+      tx-fifo-depth = <8192>;
+      snps,multicast-filter-bins = <0>;
+      snps,perfect-filter-entries = <1>;
+      snps,aal;
+      snps,txpbl = <8>;
+      snps,rxpbl = <8>;
+      snps,mtl-rx-config = <&gmac0_mtl_rx_setup>;
+      snps,mtl-tx-config = <&gmac0_mtl_tx_setup>;
+      snps,axi-config = <&gmac0_stmmac_axi_setup>;
+      status = "disabled";
+
+      mdio {
+        compatible = "snps,dwmac-mdio";
+        #address-cells = <1>;
+        #size-cells = <0>;
+      };
+
+      gmac0_mtl_rx_setup: rx-queues-config {
+        snps,rx-queues-to-use = <1>;
+        queue0 {};
+      };
+
+      gmac0_mtl_tx_setup: tx-queues-config {
+        snps,tx-queues-to-use = <1>;
+        queue0 {};
+      };
+
+      gmac0_stmmac_axi_setup: stmmac-axi-config {
+        snps,blen = <16 8 4 0 0 0 0>;
+        snps,rd_osr_lmt = <2>;
+        snps,wr_osr_lmt = <1>;
+      };
+    };
-- 
2.50.0

[PATCH net-next RFC v3 2/4] riscv: dts: sophgo: Add ethernet device for cv18xx

[Inochi Amaoto]

Add ethernet controller device node for cv18xx SoC.

Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
---
 arch/riscv/boot/dts/sophgo/cv180x.dtsi | 44 ++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/arch/riscv/boot/dts/sophgo/cv180x.dtsi b/arch/riscv/boot/dts/sophgo/cv180x.dtsi
index e91bb512b099..7eecc67f896e 100644
--- a/arch/riscv/boot/dts/sophgo/cv180x.dtsi
+++ b/arch/riscv/boot/dts/sophgo/cv180x.dtsi
@@ -189,6 +189,50 @@ i2c4: i2c@4040000 {
 			status = "disabled";
 		};
 
+		gmac0: ethernet@4070000 {
+			compatible = "sophgo,cv1800b-dwmac", "snps,dwmac-3.70a";
+			reg = <0x04070000 0x10000>;
+			clocks = <&clk CLK_AXI4_ETH0>, <&clk CLK_ETH0_500M>;
+			clock-names = "stmmaceth", "ptp_ref";
+			interrupts = <SOC_PERIPHERAL_IRQ(15) IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "macirq";
+			resets = <&rst RST_ETH0>;
+			reset-names = "stmmaceth";
+			rx-fifo-depth = <8192>;
+			tx-fifo-depth = <8192>;
+			snps,multicast-filter-bins = <0>;
+			snps,perfect-filter-entries = <1>;
+			snps,aal;
+			snps,txpbl = <8>;
+			snps,rxpbl = <8>;
+			snps,mtl-rx-config = <&gmac0_mtl_rx_setup>;
+			snps,mtl-tx-config = <&gmac0_mtl_tx_setup>;
+			snps,axi-config = <&gmac0_stmmac_axi_setup>;
+			status = "disabled";
+
+			gmac0_mdio: mdio {
+				compatible = "snps,dwmac-mdio";
+				#address-cells = <1>;
+				#size-cells = <0>;
+			};
+
+			gmac0_mtl_rx_setup: rx-queues-config {
+				snps,rx-queues-to-use = <1>;
+				queue0 {};
+			};
+
+			gmac0_mtl_tx_setup: tx-queues-config {
+				snps,tx-queues-to-use = <1>;
+				queue0 {};
+			};
+
+			gmac0_stmmac_axi_setup: stmmac-axi-config {
+				snps,blen = <16 8 4 0 0 0 0>;
+				snps,rd_osr_lmt = <2>;
+				snps,wr_osr_lmt = <1>;
+			};
+		};
+
 		uart0: serial@4140000 {
 			compatible = "snps,dw-apb-uart";
 			reg = <0x04140000 0x100>;
-- 
2.50.0

[PATCH net-next RFC v3 3/4] riscv: dts: sophgo: Add mdio multiplexer device for cv18xx

[Inochi Amaoto]

Add DT device node of mdio multiplexer device for cv18xx SoC.

Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
---
 arch/riscv/boot/dts/sophgo/cv180x.dtsi | 29 ++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/arch/riscv/boot/dts/sophgo/cv180x.dtsi b/arch/riscv/boot/dts/sophgo/cv180x.dtsi
index 7eecc67f896e..4c7335ff93a1 100644
--- a/arch/riscv/boot/dts/sophgo/cv180x.dtsi
+++ b/arch/riscv/boot/dts/sophgo/cv180x.dtsi
@@ -31,6 +31,33 @@ rst: reset-controller@3003000 {
 			#reset-cells = <1>;
 		};
 
+		mdio: mdio@3009800 {
+			compatible = "mdio-mux-mmioreg", "mdio-mux";
+			reg = <0x3009800 0x4>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			mdio-parent-bus = <&gmac0_mdio>;
+			mux-mask = <0x80>;
+			status = "disabled";
+
+			internal_mdio: mdio@0 {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				reg = <0>;
+
+				internal_ephy: phy@0 {
+					compatible = "ethernet-phy-ieee802.3-c22";
+					reg = <0>;
+				};
+			};
+
+			external_mdio: mdio@80 {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				reg = <0x80>;
+			};
+		};
+
 		gpio0: gpio@3020000 {
 			compatible = "snps,dw-apb-gpio";
 			reg = <0x3020000 0x1000>;
@@ -196,6 +223,8 @@ gmac0: ethernet@4070000 {
 			clock-names = "stmmaceth", "ptp_ref";
 			interrupts = <SOC_PERIPHERAL_IRQ(15) IRQ_TYPE_LEVEL_HIGH>;
 			interrupt-names = "macirq";
+			phy-handle = <&internal_ephy>;
+			phy-mode = "internal";
 			resets = <&rst RST_ETH0>;
 			reset-names = "stmmaceth";
 			rx-fifo-depth = <8192>;
-- 
2.50.0

[PATCH net-next RFC v3 4/4] riscv: dts: sophgo: Enable ethernet device for Huashan Pi

[Inochi Amaoto]

Enable ethernet controller and mdio multiplexer device on Huashan Pi.

Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
---
 arch/riscv/boot/dts/sophgo/cv1812h-huashan-pi.dts | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/riscv/boot/dts/sophgo/cv1812h-huashan-pi.dts b/arch/riscv/boot/dts/sophgo/cv1812h-huashan-pi.dts
index 26b57e15adc1..4a5835fa9e96 100644
--- a/arch/riscv/boot/dts/sophgo/cv1812h-huashan-pi.dts
+++ b/arch/riscv/boot/dts/sophgo/cv1812h-huashan-pi.dts
@@ -55,6 +55,14 @@ &emmc {
 	non-removable;
 };
 
+&gmac0 {
+	status = "okay";
+};
+
+&mdio {
+	status = "okay";
+};
+
 &sdhci0 {
 	status = "okay";
 	bus-width = <4>;
-- 
2.50.0