linux-kernel - [PATCH v2 5/5] arm64: dts: allwinner: t527: add EMAC0 to Avaota-A1 board

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Message-Id: <20250424-01-sun55i-emac0-v2-5-833f04d23e1d@gentoo.org>
Date: Thu, 24 Apr 2025 18:08:43 +0800
From: Yixun Lan <dlan@...too.org>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Chen-Yu Tsai <wens@...e.org>, 
 Jernej Skrabec <jernej.skrabec@...il.com>, 
 Samuel Holland <samuel@...lland.org>, Maxime Ripard <mripard@...nel.org>, 
 Andrew Lunn <andrew+netdev@...n.ch>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>
Cc: Andre Przywara <andre.przywara@....com>, 
 Corentin Labbe <clabbe.montjoie@...il.com>, devicetree@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev, 
 linux-kernel@...r.kernel.org, netdev@...r.kernel.org, 
 Yixun Lan <dlan@...too.org>
Subject: [PATCH v2 5/5] arm64: dts: allwinner: t527: add EMAC0 to Avaota-A1
 board

On Avaota A1 board, the EMAC0 connect to an external RTL8211F-CG PHY,
which features a 25MHz crystal, and using PH8 pin as PHY reset.

Signed-off-by: Yixun Lan <dlan@...too.org>
---
I don't own this board, only compose this patch according to the
schematics. Let me know if it works.
---
 .../boot/dts/allwinner/sun55i-t527-avaota-a1.dts      | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun55i-t527-avaota-a1.dts b/arch/arm64/boot/dts/allwinner/sun55i-t527-avaota-a1.dts
index 85a546aecdbe149d6bad10327fca1fb7dafff6ad..4524a195e86d20089cc35610495424ed2dec7e95 100644
--- a/arch/arm64/boot/dts/allwinner/sun55i-t527-avaota-a1.dts
+++ b/arch/arm64/boot/dts/allwinner/sun55i-t527-avaota-a1.dts
@@ -12,6 +12,7 @@ / {
 	compatible = "yuzukihd,avaota-a1", "allwinner,sun55i-t527";

 	aliases {
+		ethernet0 = &emac0;
 		serial0 = &uart0;
 	};

@@ -64,6 +65,24 @@ &ehci1 {
 	status = "okay";
 };

+&emac0 {
+	phy-mode = "rgmii-id";
+	phy-handle = <&ext_rgmii_phy>;
+	phy-supply = <&reg_dcdc4>;
+
+	allwinner,tx-delay-ps = <100>;
+	allwinner,rx-delay-ps = <300>;
+
+	status = "okay";
+};
+
+&mdio0 {
+	ext_rgmii_phy: ethernet-phy@1 {
+		compatible = "ethernet-phy-ieee802.3-c22";
+		reg = <1>;
+	};
+};
+
 &mmc0 {
 	vmmc-supply = <&reg_cldo3>;
 	cd-gpios = <&pio 5 6 (GPIO_ACTIVE_LOW | GPIO_PULL_DOWN)>; /* PF6 */

-- 
2.49.0