[PATCH v2] riscv: dts: spacemit: Add ethernet device for K3
From: Inochi Amaoto
Date: Tue Mar 17 2026 - 20:40:28 EST
Add all ethernet device nodes for K3 SoC.
Signed-off-by: Inochi Amaoto <inochiama@xxxxxxxxx>
---
Require the following patch series:
1. Basic DT device patch
https://lore.kernel.org/spacemit/20260304-01-dts-uart-full-v1-0-50a0aa53a245@xxxxxxxxxx
2. Ethernet driver patch
https://lore.kernel.org/spacemit/20260316010041.164360-1-inochiama@xxxxxxxxx
Changed from v1:
1. remove interrupt-parents property
2. add aliases for ethernet node
---
arch/riscv/boot/dts/spacemit/k3-pico-itx.dts | 25 +++++
arch/riscv/boot/dts/spacemit/k3-pinctrl.dtsi | 48 +++++++++
arch/riscv/boot/dts/spacemit/k3.dtsi | 104 +++++++++++++++++++
3 files changed, 177 insertions(+)
create mode 100644 arch/riscv/boot/dts/spacemit/k3-pinctrl.dtsi
diff --git a/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts b/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts
index b691304d4b74..c19d6ee51702 100644
--- a/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts
+++ b/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts
@@ -4,7 +4,10 @@
* Copyright (c) 2026 Guodong Xu <guodong@xxxxxxxxxxxx>
*/
+#include <dt-bindings/gpio/gpio.h>
+
#include "k3.dtsi"
+#include "k3-pinctrl.dtsi"
/ {
model = "SpacemiT K3 Pico-ITX";
@@ -12,6 +15,9 @@ / {
aliases {
serial0 = &uart0;
+ ethernet0 = ð0;
+ ethernet1 = ð1;
+ ethernet2 = ð2;
};
chosen {
@@ -24,6 +30,25 @@ memory@100000000 {
};
};
+ð0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&gmac0_cfg>;
+
+ phy-mode = "rgmii-id";
+ phy-handle = <&phy0>;
+ status = "okay";
+
+ mdio {
+ phy0: phy@1 {
+ compatible = "ethernet-phy-ieee802.3-c22";
+ reg = <1>;
+ reset-gpios = <&gpio 0 15 GPIO_ACTIVE_LOW>;
+ reset-assert-us = <10000>;
+ reset-deassert-us = <10000>;
+ };
+ };
+};
+
&uart0 {
status = "okay";
};
diff --git a/arch/riscv/boot/dts/spacemit/k3-pinctrl.dtsi b/arch/riscv/boot/dts/spacemit/k3-pinctrl.dtsi
new file mode 100644
index 000000000000..414ee221d3d7
--- /dev/null
+++ b/arch/riscv/boot/dts/spacemit/k3-pinctrl.dtsi
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright (c) 2026 SpacemiT (Hangzhou) Technology Co. Ltd
+ */
+
+#include <dt-bindings/gpio/gpio.h>
+
+#define K3_PADCONF(pin, func) (((pin) << 16) | (func))
+
+&pinctrl {
+ gmac0_cfg: gmac0-cfg {
+ gmac0_base_pins: gmac0-0-pins {
+ pinmux = <K3_PADCONF(0, 1)>,
+ <K3_PADCONF(1, 1)>,
+ <K3_PADCONF(2, 1)>,
+ <K3_PADCONF(3, 1)>,
+ <K3_PADCONF(6, 1)>,
+ <K3_PADCONF(7, 1)>,
+ <K3_PADCONF(11, 1)>,
+ <K3_PADCONF(12, 1)>,
+ <K3_PADCONF(13, 1)>;
+
+ bias-disable;
+ drive-strength = <25>;
+ power-source = <1800>;
+ };
+
+ gmac0_rgmii_add_pins: gmac0-1-pins {
+ pinmux = <K3_PADCONF(4, 1)>,
+ <K3_PADCONF(5, 1)>,
+ <K3_PADCONF(8, 1)>,
+ <K3_PADCONF(9, 1)>,
+ <K3_PADCONF(10, 1)>;
+
+ bias-disable;
+ drive-strength = <25>;
+ power-source = <1800>;
+ };
+
+ gmac0_int_pins: gmac0-3-pins {
+ pinmux = <K3_PADCONF(14, 1)>;
+
+ bias-disable;
+ drive-strength = <25>;
+ power-source = <1800>;
+ };
+ };
+};
diff --git a/arch/riscv/boot/dts/spacemit/k3.dtsi b/arch/riscv/boot/dts/spacemit/k3.dtsi
index 6cc31e94c13a..4c0cc135dc09 100644
--- a/arch/riscv/boot/dts/spacemit/k3.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k3.dtsi
@@ -5,6 +5,7 @@
*/
#include <dt-bindings/clock/spacemit,k3-clocks.h>
+#include <dt-bindings/reset/spacemit,k3-resets.h>
#include <dt-bindings/interrupt-controller/irq.h>
/dts-v1/;
@@ -437,6 +438,109 @@ soc: soc {
dma-noncoherent;
ranges;
+ gmac_axi_setup: stmmac-axi-config {
+ snps,wr_osr_lmt = <0xf>;
+ snps,rd_osr_lmt = <0xf>;
+ /* max axi burst len is 256 */
+ snps,blen = <256 128 64 32 16 0 0>;
+ };
+
+ eth0: ethernet@cac80000 {
+ compatible = "spacemit,k3-dwmac", "snps,dwmac-5.40a";
+ reg = <0x0 0xcac80000 0x0 0x2000>;
+ clocks = <&syscon_apmu CLK_APMU_EMAC0_BUS>,
+ <&syscon_apmu CLK_APMU_EMAC0_1588>,
+ <&syscon_apmu CLK_APMU_EMAC0_RGMII_TX>;
+ clock-names = "stmmaceth", "ptp_ref", "tx";
+ interrupts = <131 IRQ_TYPE_LEVEL_HIGH>,
+ <276 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "macirq", "eth_wake_irq";
+ resets = <&syscon_apmu RESET_APMU_EMAC0>;
+ reset-names = "stmmaceth";
+ rx-fifo-depth = <8192>;
+ tx-fifo-depth = <8192>;
+ snps,multicast-filter-bins = <64>;
+ snps,perfect-filter-entries = <32>;
+ snps,aal;
+ snps,tso;
+ snps,txpbl = <8>;
+ snps,rxpbl = <8>;
+ snps,force_sf_dma_mode;
+ snps,axi-config = <&gmac_axi_setup>;
+ spacemit,apmu = <&syscon_apmu 0x3e4 0x3e8>;
+ status = "disabled";
+
+ mdio {
+ compatible = "snps,dwmac-mdio";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ };
+ };
+
+ eth1: ethernet@cac82000 {
+ compatible = "spacemit,k3-dwmac", "snps,dwmac-5.40a";
+ reg = <0x0 0xcac82000 0x0 0x2000>;
+ clocks = <&syscon_apmu CLK_APMU_EMAC1_BUS>,
+ <&syscon_apmu CLK_APMU_EMAC1_1588>,
+ <&syscon_apmu CLK_APMU_EMAC1_RGMII_TX>;
+ clock-names = "stmmaceth", "ptp_ref", "tx";
+ interrupts = <133 IRQ_TYPE_LEVEL_HIGH>,
+ <277 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "macirq", "eth_wake_irq";
+ resets = <&syscon_apmu RESET_APMU_EMAC1>;
+ reset-names = "stmmaceth";
+ rx-fifo-depth = <8192>;
+ tx-fifo-depth = <8192>;
+ snps,multicast-filter-bins = <64>;
+ snps,perfect-filter-entries = <32>;
+ snps,aal;
+ snps,tso;
+ snps,txpbl = <8>;
+ snps,rxpbl = <8>;
+ snps,force_sf_dma_mode;
+ snps,axi-config = <&gmac_axi_setup>;
+ spacemit,apmu = <&syscon_apmu 0x3ec 0x3f0>;
+ status = "disabled";
+
+ mdio {
+ compatible = "snps,dwmac-mdio";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ };
+ };
+
+ eth2: ethernet@cac8e000 {
+ compatible = "spacemit,k3-dwmac", "snps,dwmac-5.40a";
+ reg = <0x0 0xcac8e000 0x0 0x2000>;
+ clocks = <&syscon_apmu CLK_APMU_EMAC2_BUS>,
+ <&syscon_apmu CLK_APMU_EMAC2_1588>,
+ <&syscon_apmu CLK_APMU_EMAC2_RGMII_TX>;
+ clock-names = "stmmaceth", "ptp_ref", "tx";
+ interrupts = <130 IRQ_TYPE_LEVEL_HIGH>,
+ <278 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "macirq", "eth_wake_irq";
+ resets = <&syscon_apmu RESET_APMU_EMAC2>;
+ reset-names = "stmmaceth";
+ rx-fifo-depth = <4096>;
+ tx-fifo-depth = <4096>;
+ snps,multicast-filter-bins = <64>;
+ snps,perfect-filter-entries = <32>;
+ snps,aal;
+ snps,tso;
+ snps,txpbl = <8>;
+ snps,rxpbl = <8>;
+ snps,force_sf_dma_mode;
+ snps,axi-config = <&gmac_axi_setup>;
+ spacemit,apmu = <&syscon_apmu 0x248 0x24c>;
+ status = "disabled";
+
+ mdio {
+ compatible = "snps,dwmac-mdio";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ };
+ };
+
syscon_apbc: system-controller@d4015000 {
compatible = "spacemit,k3-syscon-apbc";
reg = <0x0 0xd4015000 0x0 0x1000>;
--
2.53.0