linux-kernel - [PATCH net-next v5 3/5] riscv: dts: spacemit: Add Ethernet support for K1

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Message-Id: <20250812-net-k1-emac-v5-3-dd17c4905f49@iscas.ac.cn>
Date: Tue, 12 Aug 2025 10:02:19 +0800
From: Vivian Wang <wangruikang@...as.ac.cn>
To: Andrew Lunn <andrew+netdev@...n.ch>, Jakub Kicinski <kuba@...nel.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Yixun Lan <dlan@...too.org>, 
 Vivian Wang <wangruikang@...as.ac.cn>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Paolo Abeni <pabeni@...hat.com>, Philipp Zabel <p.zabel@...gutronix.de>, 
 Paul Walmsley <paul.walmsley@...ive.com>, 
 Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
 Alexandre Ghiti <alex@...ti.fr>
Cc: Vivian Wang <uwu@...m.page>, 
 Vadim Fedorenko <vadim.fedorenko@...ux.dev>, 
 Junhui Liu <junhui.liu@...moral.tech>, Simon Horman <horms@...nel.org>, 
 Maxime Chevallier <maxime.chevallier@...tlin.com>, 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 v5 3/5] 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 3810557374228100be7adab58cd785c72e6d4aed..aff19c86d5ff381881016eaa87fc4809da65b50e 100644
--- a/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi
@@ -11,6 +11,54 @@
 #define K1_GPIO(x)	(x / 32) (x % 32)
 
 &pinctrl {
+	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>;
+		};
+	};
+
 	uart0_2_cfg: uart0-2-cfg {
 		uart0-2-pins {
 			pinmux = <K1_PADCONF(68, 2)>,
diff --git a/arch/riscv/boot/dts/spacemit/k1.dtsi b/arch/riscv/boot/dts/spacemit/k1.dtsi
index abde8bb07c95c5a745736a2dd6f0c0e0d7c696e4..7b2ac3637d6d9fa1929418cc68aa25c57850ac7f 100644
--- a/arch/riscv/boot/dts/spacemit/k1.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k1.dtsi
@@ -805,6 +805,28 @@ network-bus {
 			#size-cells = <2>;
 			dma-ranges = <0x0 0x00000000 0x0 0x00000000 0x0 0x80000000>,
 				     <0x0 0x80000000 0x1 0x00000000 0x0 0x80000000>;
+
+			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";
+			};
 		};
 
 		pcie-bus {

-- 
2.50.1