ramips: add support for ASUS RT-AC85U

This patch adds support for the ASUS RT-AC85U wireless router.
It is a dual-band gigabit router based on the MediaTek MT7621AT SoC.

MAC Address Layout:
- LAN/WAN/2.4G/5G MAC addresses are derived from the
  factory partition at offset 0xe000.

Hardware Specifications:
- SoC: MediaTek MT7621AT (880 MHz, 2C/4T)
- RAM: 128 MB DDR3
- Flash: 128 MB Winbond W29N01HV NAND
- WI1: MediaTek MT7615E (2.4 GHz, 4x4)
- WI2: MediaTek MT7615E (5 GHz, 4x4)
- Switch: MediaTek MT7530 (Embedded Gigabit Switch)
- Ports: 1x WAN, 4x LAN (10/100/1000 Mbps), 1x USB 3.0
- LEDs: Power, LAN, WAN, 2.4G, 5G, USB, WPS
- Buttons: WPS, Reset

Installation / Flashing guide:
1. Power off the device.
2. Hold Reset button and power on to enter ASUS Restoration mode (slow flash LED).
3. Set your computer's static IP to 192.168.1.x (e.g., 192.168.1.10).
4. Upload the OpenWrt initramfs image via ASUS Restoration tool to 192.168.1.1.
5. Wait for the device to boot into the temporary OpenWrt environment.
6. Access LuCI (192.168.1.1) and flash sysupgrade image to make it permanent.

Signed-off-by: YAJIMA Hideyuki <ursmtr@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/23747
Signed-off-by: Robert Marko <robimarko@gmail.com>

diff --git a/target/linux/ramips/dts/mt7621_asus_rt-ac85u.dts b/target/linux/ramips/dts/mt7621_asus_rt-ac85u.dts
new file mode 100644 (file)
index 0000000..92bca2e
--- /dev/null
+++ b/target/linux/ramips/dts/mt7621_asus_rt-ac85u.dts
@@ -0,0 +1,233 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "mt7621.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/leds/common.h>
+
+/ {
+       compatible = "asus,rt-ac85u", "mediatek,mt7621-soc";
+       model = "ASUS RT-AC85U";
+
+       aliases {
+               led-boot = &led_power;
+               led-failsafe = &led_power;
+               led-running = &led_power;
+               led-upgrade = &led_power;
+               label-mac-device = &gmac0;
+       };
+
+       keys {
+               compatible = "gpio-keys";
+
+               reset {
+                       label = "reset";
+                       gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
+                       linux,code = <KEY_RESTART>;
+               };
+
+               wps {
+                       label = "wps";
+                       gpios = <&gpio 18 GPIO_ACTIVE_LOW>;
+                       linux,code = <KEY_WPS_BUTTON>;
+               };
+       };
+
+       leds {
+               compatible = "gpio-leds";
+
+               led_power: power {
+                       function = LED_FUNCTION_POWER;
+                       color = <LED_COLOR_ID_BLUE>;
+                       gpios = <&gpio 6 GPIO_ACTIVE_LOW>;
+               };
+
+               wifi2g {
+                       color = <LED_COLOR_ID_BLUE>;
+                       function = LED_FUNCTION_WLAN_2GHZ;
+                       gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
+                       linux,default-trigger = "phy0tpt";
+               };
+
+               wifi5g {
+                       color = <LED_COLOR_ID_BLUE>;
+                       function = LED_FUNCTION_WLAN_5GHZ;
+                       gpios = <&gpio 7 GPIO_ACTIVE_LOW>;
+                       linux,default-trigger = "phy1tpt";
+               };
+
+               wan {
+                       color = <LED_COLOR_ID_BLUE>;
+                       function = LED_FUNCTION_WAN;
+                       gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
+               };
+
+               lan {
+                       color = <LED_COLOR_ID_BLUE>;
+                       function = LED_FUNCTION_LAN;
+                       gpios = <&gpio 14 GPIO_ACTIVE_LOW>;
+               };
+
+               usb {
+                       color = <LED_COLOR_ID_BLUE>;
+                       function = LED_FUNCTION_USB;
+                       gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
+               };
+
+               wps {
+                       color = <LED_COLOR_ID_BLUE>;
+                       function = LED_FUNCTION_WPS;
+                       gpios = <&gpio 12 GPIO_ACTIVE_LOW>;
+               };
+       };
+};
+
+&nand {
+       status = "okay";
+
+       partitions {
+               compatible = "fixed-partitions";
+               #address-cells = <1>;
+               #size-cells = <1>;
+
+               partition@0 {
+                       label = "u-boot";
+                       reg = <0x0 0xe0000>;
+                       read-only;
+               };
+
+               partition@e0000 {
+                       label = "u-boot-env";
+                       reg = <0xe0000 0x100000>;
+                       read-only;
+               };
+
+               partition@1e0000 {
+                       label = "factory";
+                       reg = <0x1e0000 0x100000>;
+                       read-only;
+
+                       nvmem-layout {
+                               compatible = "fixed-layout";
+                               #address-cells = <1>;
+                               #size-cells = <1>;
+
+                               eeprom_factory_0: eeprom@0 {
+                                       reg = <0x0 0x4da8>;
+                               };
+
+                               eeprom_factory_8000: eeprom@8000 {
+                                       reg = <0x8000 0x4da8>;
+                               };
+
+                               macaddr_factory_e000: macaddr@e000 {
+                                       reg = <0xe000 0x6>;
+                               };
+                       };
+               };
+
+               partition@2e0000 {
+                       label = "factory2";
+                       reg = <0x2e0000 0x100000>;
+                       read-only;
+               };
+
+               partition@3e0000 {
+                       label = "kernel";
+                       reg = <0x3e0000 0x400000>;
+               };
+
+               partition@7e0000 {
+                       label = "ubi";
+                       reg = <0x7e0000 0x2e00000>;
+               };
+
+               partition@35e0000 {
+                       label = "firmware2";
+                       reg = <0x35e0000 0x3200000>;
+               };
+       };
+};
+
+&pcie {
+       status = "okay";
+};
+
+&pcie0 {
+       wifi0: wifi@0,0 {
+               compatible = "mediatek,mt76";
+               reg = <0x0000 0 0 0 0>;
+               nvmem-cells = <&eeprom_factory_0>;
+               nvmem-cell-names = "eeprom";
+               ieee80211-freq-limit = <2400000 2500000>;
+       };
+};
+
+&pcie1 {
+       wifi1: wifi@0,0 {
+               compatible = "mediatek,mt76";
+               reg = <0x0000 0 0 0 0>;
+               nvmem-cells = <&eeprom_factory_8000>;
+               nvmem-cell-names = "eeprom";
+               ieee80211-freq-limit = <5000000 6000000>;
+       };
+};
+
+
+&gmac0 {
+       nvmem-cells = <&macaddr_factory_e000>;
+       nvmem-cell-names = "mac-address";
+};
+
+&gmac1 {
+       status = "okay";
+       label = "wan";
+       phy-handle = <&ethphy4>;
+
+       nvmem-cells = <&macaddr_factory_e000>;
+       nvmem-cell-names = "mac-address";
+};
+
+&ethphy4 {
+       /delete-property/ interrupts;
+};
+
+&switch0 {
+       ports {
+               port@0 {
+                       status = "okay";
+                       label = "lan1";
+               };
+
+               port@1 {
+                       status = "okay";
+                       label = "lan2";
+               };
+
+               port@2 {
+                       status = "okay";
+                       label = "lan3";
+               };
+
+               port@3 {
+                       status = "okay";
+                       label = "lan4";
+               };
+
+               port@4 {
+                       status = "disabled";
+               };
+       };
+};
+
+&state_default {
+       gpio {
+               groups = "uart2", "uart3", "i2c";
+               function = "gpio";
+       };
+};
+
+&xhci {
+       status = "okay";
+};

diff --git a/target/linux/ramips/image/mt7621.mk b/target/linux/ramips/image/mt7621.mk
index a80bede3478427e1063e3732a4a5927ea3bcda6b..96653683de6393a8fb034b2ee067bdc132c9a7a9 100644 (file)
--- a/target/linux/ramips/image/mt7621.mk
+++ b/target/linux/ramips/image/mt7621.mk
@@ -458,6 +458,16 @@ define Device/asus_rt-ac85p
 endef
 TARGET_DEVICES += asus_rt-ac85p
 
+define Device/asus_rt-ac85u
+  $(Device/nand)
+  DEVICE_VENDOR := ASUS
+  DEVICE_MODEL := RT-AC85U
+  DEVICE_DTS := mt7621_asus_rt-ac85u
+  IMAGE_SIZE := 51200k
+  DEVICE_PACKAGES := kmod-usb3 kmod-mt7615-firmware uboot-envtools
+endef
+TARGET_DEVICES += asus_rt-ac85u
+
 define Device/asus_rt-n56u-b1
   $(Device/dsa-migration)
   $(Device/uimage-lzma-loader)

diff --git a/target/linux/ramips/mt7621/base-files/lib/upgrade/platform.sh b/target/linux/ramips/mt7621/base-files/lib/upgrade/platform.sh
index 52617bc4264a8cf8aee9dd69754efe39d30840cb..4e1aab276343997c7216f7e684a3f771269a229d 100644 (file)
--- a/target/linux/ramips/mt7621/base-files/lib/upgrade/platform.sh
+++ b/target/linux/ramips/mt7621/base-files/lib/upgrade/platform.sh
@@ -73,6 +73,7 @@ platform_do_upgrade() {
        arcadyan,we420223-99|\
        asus,rt-ac65p|\
        asus,rt-ac85p|\
+       asus,rt-ac85u|\
        asus,rt-ax53u|\
        asus,rt-ax54|\
        asus,4g-ax56|\