[PATCH 10/15] arm64: dts: mediatek: mt7981b: Add Ethernet and WiFi offload support

Sjoerd Simons
2025-10-16T10:09:46Z

Add device tree nodes for the Ethernet subsystem on MT7981B SoC,
including:
- Ethernet MAC controller with dual GMAC support
- Wireless Ethernet Dispatch (WED)
- SGMII PHY controllers for high-speed Ethernet interfaces
- Reserved memory regions for WiFi offload processor

Signed-off-by: Sjoerd Simons <sjoerd@collabora.com>
---
arch/arm64/boot/dts/mediatek/mt7981b.dtsi | 133 ++++++++++++++++++++++++++++++
1 file changed, 133 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt7981b.dtsi b/arch/arm64/boot/dts/mediatek/mt7981b.dtsi
index 13950fe6e8766..c85fa0ddf2da8 100644
--- a/arch/arm64/boot/dts/mediatek/mt7981b.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt7981b.dtsi
@@ -2,6 +2,7 @@

#include <dt-bindings/clock/mediatek,mt7981-clk.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/leds/common.h>
#include <dt-bindings/phy/phy.h>
#include <dt-bindings/reset/mt7986-resets.h>

@@ -47,11 +48,36 @@ reserved-memory {
#size-cells = <2>;
ranges;

+ wo_boot: wo-boot@15194000 {
+ reg = <0 0x15194000 0 0x1000>;
+ no-map;
+ };
+
+ wo_ilm0: wo-ilm@151e0000 {
+ reg = <0 0x151e0000 0 0x8000>;
+ no-map;
+ };
+
+ wo_dlm0: wo-dlm@151e8000 {
+ reg = <0 0x151e8000 0 0x2000>;
+ no-map;
+ };
+
/* 192 KiB reserved for ARM Trusted Firmware (BL31) */
secmon_reserved: secmon@43000000 {
reg = <0 0x43000000 0 0x30000>;
no-map;
};
+
+ wo_emi0: wo-emi@47d80000 {
+ reg = <0 0x47d80000 0 0x40000>;
+ no-map;
+ };
+
+ wo_data: wo-data@47dc0000 {
+ reg = <0 0x47dc0000 0 0x240000>;
+ no-map;
+ };
};

soc {
@@ -107,6 +133,18 @@ pwm: pwm@10048000 {
#pwm-cells = <2>;
};

+ sgmiisys0: syscon@10060000 {
+ compatible = "mediatek,mt7981-sgmiisys_0", "syscon";
+ reg = <0 0x10060000 0 0x1000>;
+ #clock-cells = <1>;
+ };
+
+ sgmiisys1: syscon@10070000 {
+ compatible = "mediatek,mt7981-sgmiisys_1", "syscon";
+ reg = <0 0x10070000 0 0x1000>;
+ #clock-cells = <1>;
+ };
+
uart0: serial@11002000 {
compatible = "mediatek,mt7981-uart", "mediatek,mt6577-uart";
reg = <0 0x11002000 0 0x100>;
@@ -338,6 +376,10 @@ soc-uuid@140 {
thermal_calibration: thermal-calib@274 {
reg = <0x274 0xc>;
};
+
+ phy_calibration: phy-calib@8dc {
+ reg = <0x8dc 0x10>;
+ };
};

ethsys: clock-controller@15000000 {
@@ -347,6 +389,97 @@ ethsys: clock-controller@15000000 {
#reset-cells = <1>;
};

+ wed: wed@15010000 {
+ compatible = "mediatek,mt7981-wed",
+ "syscon";
+ reg = <0 0x15010000 0 0x1000>;
+ interrupt-parent = <&gic>;
+ interrupts = <GIC_SPI 205 IRQ_TYPE_LEVEL_HIGH>;
+ memory-region = <&wo_emi0>, <&wo_ilm0>, <&wo_dlm0>,
+ <&wo_data>, <&wo_boot>;
+ memory-region-names = "wo-emi", "wo-ilm", "wo-dlm",
+ "wo-data", "wo-boot";
+ mediatek,wo-ccif = <&wo_ccif0>;
+ };
+
+ eth: ethernet@15100000 {
+ compatible = "mediatek,mt7981-eth";
+ reg = <0 0x15100000 0 0x40000>;
+ assigned-clocks = <&topckgen CLK_TOP_NETSYS_2X_SEL>,
+ <&topckgen CLK_TOP_SGM_325M_SEL>;
+ assigned-clock-parents = <&topckgen CLK_TOP_CB_NET2_800M>,
+ <&topckgen CLK_TOP_CB_SGM_325M>;
+ clocks = <&ethsys CLK_ETH_FE_EN>,
+ <&ethsys CLK_ETH_GP2_EN>,
+ <&ethsys CLK_ETH_GP1_EN>,
+ <&ethsys CLK_ETH_WOCPU0_EN>,
+ <&topckgen CLK_TOP_SGM_REG>,
+ <&sgmiisys0 CLK_SGM0_TX_EN>,
+ <&sgmiisys0 CLK_SGM0_RX_EN>,
+ <&sgmiisys0 CLK_SGM0_CK0_EN>,
+ <&sgmiisys0 CLK_SGM0_CDR_CK0_EN>,
+ <&sgmiisys1 CLK_SGM1_TX_EN>,
+ <&sgmiisys1 CLK_SGM1_RX_EN>,
+ <&sgmiisys1 CLK_SGM1_CK1_EN>,
+ <&sgmiisys1 CLK_SGM1_CDR_CK1_EN>,
+ <&topckgen CLK_TOP_NETSYS_SEL>,
+ <&topckgen CLK_TOP_NETSYS_500M_SEL>;
+ clock-names = "fe", "gp2", "gp1", "wocpu0",
+ "sgmii_ck",
+ "sgmii_tx250m", "sgmii_rx250m",
+ "sgmii_cdr_ref", "sgmii_cdr_fb",
+ "sgmii2_tx250m", "sgmii2_rx250m",
+ "sgmii2_cdr_ref", "sgmii2_cdr_fb",
+ "netsys0", "netsys1";
+ interrupts = <GIC_SPI 196 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 197 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 198 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 199 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 189 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 190 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 191 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 192 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "fe0", "fe1", "fe2", "fe3", "pdma0",
+ "pdma1", "pdma2", "pdma3";
+ sram = <&eth_sram>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ mediatek,ethsys = <&ethsys>;
+ mediatek,sgmiisys = <&sgmiisys0>, <&sgmiisys1>;
+ mediatek,infracfg = <&topmisc>;
+ mediatek,wed = <&wed>;
+ status = "disabled";
+
+ mdio_bus: mdio-bus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ int_gbe_phy: ethernet-phy@0 {
+ compatible = "ethernet-phy-ieee802.3-c22";
+ reg = <0>;
+ phy-mode = "gmii";
+ phy-is-integrated;
+ nvmem-cells = <&phy_calibration>;
+ nvmem-cell-names = "phy-cal-data";
+ };
+ };
+ };
+
+ eth_sram: sram@15140000 {
+ compatible = "mmio-sram";
+ reg = <0 0x15140000 0 0x40000>;
+ ranges = <0 0x15140000 0 0x40000>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ };
+
+ wo_ccif0: syscon@151a5000 {
+ compatible = "mediatek,mt7986-wo-ccif", "syscon";
+ reg = <0 0x151a5000 0 0x1000>;
+ interrupt-parent = <&gic>;
+ interrupts = <GIC_SPI 211 IRQ_TYPE_LEVEL_HIGH>;
+ };
+
wifi: wifi@18000000 {
compatible = "mediatek,mt7981-wmac";
reg = <0 0x18000000 0 0x1000000>,

--
2.51.0