[PATCH 2/2] arm64: dts: renesas: gray-hawk-single: Add Ethernet support

[Geert Uytterhoeven]

From: Thanh Quan <thanh.quan.xn at renesas.com>

Describe the wiring of the first Ethernet AVB instance to the Micrel
KSZ9031RNXVB PHY.

Signed-off-by: Thanh Quan <thanh.quan.xn at renesas.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
---
Changes compared to the BSP:
  - Split in separate commits for SoC and board support,
  - Apply to r8a779h0-gray-hawk-single.dts.
---
 .../dts/renesas/r8a779h0-gray-hawk-single.dts | 37 +++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r8a779h0-gray-hawk-single.dts b/arch/arm64/boot/dts/renesas/r8a779h0-gray-hawk-single.dts
index 1bee27b2284d2eee..625e7448bc9fc1ce 100644
--- a/arch/arm64/boot/dts/renesas/r8a779h0-gray-hawk-single.dts
+++ b/arch/arm64/boot/dts/renesas/r8a779h0-gray-hawk-single.dts
@@ -15,6 +15,7 @@ / {
 
 	aliases {
 		serial0 = &hscif0;
+		ethernet0 = &avb0;
 	};
 
 	chosen {
@@ -34,6 +35,24 @@ memory at 480000000 {
 	};
 };
 
+&avb0 {
+	pinctrl-0 = <&avb0_pins>;
+	pinctrl-names = "default";
+	phy-handle = <&phy0>;
+	tx-internal-delay-ps = <2000>;
+	status = "okay";
+
+	phy0: ethernet-phy at 0 {
+		compatible = "ethernet-phy-id0022.1622",
+			     "ethernet-phy-ieee802.3-c22";
+		rxc-skew-ps = <1500>;
+		reg = <0>;
+		interrupt-parent = <&gpio7>;
+		interrupts = <5 IRQ_TYPE_LEVEL_LOW>;
+		reset-gpios = <&gpio7 10 GPIO_ACTIVE_LOW>;
+	};
+};
+
 &extal_clk {
 	clock-frequency = <16666666>;
 };
@@ -90,6 +109,24 @@ &pfc {
 	pinctrl-0 = <&scif_clk_pins>;
 	pinctrl-names = "default";
 
+	avb0_pins: avb0 {
+		mux {
+			groups = "avb0_link", "avb0_mdio", "avb0_rgmii",
+				 "avb0_txcrefclk";
+			function = "avb0";
+		};
+
+		pins_mdio {
+			groups = "avb0_mdio";
+			drive-strength = <21>;
+		};
+
+		pins_mii {
+			groups = "avb0_rgmii";
+			drive-strength = <21>;
+		};
+	};
+
 	hscif0_pins: hscif0 {
 		groups = "hscif0_data", "hscif0_ctrl";
 		function = "hscif0";
-- 
2.34.1