linux-kernel - [PATCH net-next 3/4] riscv: dts: spacemit: Add Ethernet support for K1

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Message-Id: <20250613-net-k1-emac-v1-3-cc6f9e510667@iscas.ac.cn>
Date: Fri, 13 Jun 2025 10:15:09 +0800
From: Vivian Wang <wangruikang@...as.ac.cn>
To: 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>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Yixun Lan <dlan@...too.org>, 
 Paul Walmsley <paul.walmsley@...ive.com>, 
 Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
 Alexandre Ghiti <alex@...ti.fr>, Richard Cochran <richardcochran@...il.com>, 
 Philipp Zabel <p.zabel@...gutronix.de>, 
 Russell King <linux@...linux.org.uk>, Vivian Wang <wangruikang@...as.ac.cn>
Cc: Vivian Wang <uwu@...m.page>, netdev@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org, 
 spacemit@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: [PATCH net-next 3/4] riscv: dts: spacemit: Add Ethernet support
 for K1

Add nodes for each of the two Ethernet MACs on K1 with generic
properties. Also add "gmac" pins to pinctrl config.

Signed-off-by: Vivian Wang <wangruikang@...as.ac.cn>
---
 arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi | 48 ++++++++++++++++++++++++++++
 arch/riscv/boot/dts/spacemit/k1.dtsi         | 22 +++++++++++++
 2 files changed, 70 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi b/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi
index 283663647a86ff137917ced8bfe79a129c86342a..4a7fbb40858dc1e7d2a55d4bb8547d5472ec4fc3 100644
--- a/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi
@@ -20,4 +20,52 @@ uart0-2-pins {
 			drive-strength = <32>;
 		};
 	};
+
+	gmac0_cfg: gmac0-cfg {
+		gmac0-pins {
+			pinmux = <K1_PADCONF(0, 1)>,	/* gmac0_rxdv */
+				 <K1_PADCONF(1, 1)>,	/* gmac0_rx_d0 */
+				 <K1_PADCONF(2, 1)>,	/* gmac0_rx_d1 */
+				 <K1_PADCONF(3, 1)>,	/* gmac0_rx_clk */
+				 <K1_PADCONF(4, 1)>,	/* gmac0_rx_d2 */
+				 <K1_PADCONF(5, 1)>,	/* gmac0_rx_d3 */
+				 <K1_PADCONF(6, 1)>,	/* gmac0_tx_d0 */
+				 <K1_PADCONF(7, 1)>,	/* gmac0_tx_d1 */
+				 <K1_PADCONF(8, 1)>,	/* gmac0_tx */
+				 <K1_PADCONF(9, 1)>,	/* gmac0_tx_d2 */
+				 <K1_PADCONF(10, 1)>,	/* gmac0_tx_d3 */
+				 <K1_PADCONF(11, 1)>,	/* gmac0_tx_en */
+				 <K1_PADCONF(12, 1)>,	/* gmac0_mdc */
+				 <K1_PADCONF(13, 1)>,	/* gmac0_mdio */
+				 <K1_PADCONF(14, 1)>,	/* gmac0_int_n */
+				 <K1_PADCONF(45, 1)>;	/* gmac0_clk_ref */
+
+			bias-pull-up = <0>;
+			drive-strength = <21>;
+		};
+	};
+
+	gmac1_cfg: gmac1-cfg {
+		gmac1-pins {
+			pinmux = <K1_PADCONF(29, 1)>,	/* gmac1_rxdv */
+				 <K1_PADCONF(30, 1)>,	/* gmac1_rx_d0 */
+				 <K1_PADCONF(31, 1)>,	/* gmac1_rx_d1 */
+				 <K1_PADCONF(32, 1)>,	/* gmac1_rx_clk */
+				 <K1_PADCONF(33, 1)>,	/* gmac1_rx_d2 */
+				 <K1_PADCONF(34, 1)>,	/* gmac1_rx_d3 */
+				 <K1_PADCONF(35, 1)>,	/* gmac1_tx_d0 */
+				 <K1_PADCONF(36, 1)>,	/* gmac1_tx_d1 */
+				 <K1_PADCONF(37, 1)>,	/* gmac1_tx */
+				 <K1_PADCONF(38, 1)>,	/* gmac1_tx_d2 */
+				 <K1_PADCONF(39, 1)>,	/* gmac1_tx_d3 */
+				 <K1_PADCONF(40, 1)>,	/* gmac1_tx_en */
+				 <K1_PADCONF(41, 1)>,	/* gmac1_mdc */
+				 <K1_PADCONF(42, 1)>,	/* gmac1_mdio */
+				 <K1_PADCONF(43, 1)>,	/* gmac1_int_n */
+				 <K1_PADCONF(46, 1)>;	/* gmac1_clk_ref */
+
+			bias-pull-up = <0>;
+			drive-strength = <21>;
+		};
+	};
 };
diff --git a/arch/riscv/boot/dts/spacemit/k1.dtsi b/arch/riscv/boot/dts/spacemit/k1.dtsi
index de403bda2b878c60d9eb5b4d8d336e5c52498159..61c804d3a3791127b5fee7ae78dd5be44dd33318 100644
--- a/arch/riscv/boot/dts/spacemit/k1.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k1.dtsi
@@ -580,5 +580,27 @@ sec_uart1: serial@...12000 {
 			reg-io-width = <4>;
 			status = "reserved"; /* for TEE usage */
 		};
+
+		eth0: ethernet@...80000 {
+			compatible = "spacemit,k1-emac";
+			reg = <0x0 0xcac80000 0x0 0x420>;
+			clocks = <&syscon_apmu CLK_EMAC0_BUS>;
+			interrupts = <131>;
+			mac-address = [ 00 00 00 00 00 00 ];
+			resets = <&syscon_apmu RESET_EMAC0>;
+			spacemit,apmu = <&syscon_apmu 0x3e4>;
+			status = "disabled";
+		};
+
+		eth1: ethernet@...81000 {
+			compatible = "spacemit,k1-emac";
+			reg = <0x0 0xcac81000 0x0 0x420>;
+			clocks = <&syscon_apmu CLK_EMAC1_BUS>;
+			interrupts = <133>;
+			mac-address = [ 00 00 00 00 00 00 ];
+			resets = <&syscon_apmu RESET_EMAC1>;
+			spacemit,apmu = <&syscon_apmu 0x3ec>;
+			status = "disabled";
+		};
 	};
 };

-- 
2.49.0