qualcommax: ipq807x: add Netgear RBx750 support

Netgear RBx750 are tri band, 2.4GHz and 2x 5GHz, 8 stream 802.11ax mesh
devices from the Orbi series. The RBR750 is a router with a WAN and 3 LAN
ports. The RBS750 is a satellite without WAN port, only 2 LAN ports and
half the flash. The hardware is otherwise identical. They were sold in
kits as RBK752-RBK757, with one router and 1-6 satellites.

Hardware:
* SoC: Qualcomm IPQ8074
* RAM: 1GiB 1x Samsung
* Flash: 512MiB Winbond W29N04GZ or 256MiB Winbond W29N02GZ
* WLAN 2.4GHz: QCN5024 2x2:2 b/g/n/ax
* WLAN 5GHz Low Band: QCN5054 2x2:2 a/n/ac/ax 5180-5320MHz
* WLAN 5GHz High Band: QCN5054 4x4:4 a/n/ac/ax 5500-5700MHz
* Ethernet: QCA8075 switch with 1 WAN and 3 LAN ports or 2 LAN ports
* Serial Config: 3.3V TTL 115200-8-N-1, internal populated header
* Serial Layout: Bottom <- RX, TX, GND, 3.3V (don't connect) -> Top
* LEDs: green/red power, white/red/green/blue status
* Buttons: 1x Reset, 1x WPS

MAC addresses:
LAN1: base address on label
LAN2: base + 1
LAN3: base + 2
WAN: base + 1
2.4GHz: base + 2
5GHz-Low: base + 3
5GHz-High: base + 4

Flashing Notes:
The stock firmware images are signed. Both the bootloader and the stock
web interface check the signature and will fail to boot/flash.
The bootloader automatically does NMRP when a gigabit LAN connection is
present. The stock and factory images contain a U-Boot script that is
executed when flashing using NMRP. This is used to alter and persist the
U-Boot env with a boot command that works with unsigned firmware.

Install OpenWrt:
* Get the nmrpflash utility [0] and OpenWrt factory image
* Find network interface to use: nmrpflash -L
* Start nmrpflash: nmrpflash -i interface -f openwrt-...-factory.img
* Connect the device LAN port closest to the power jack to the same
  network using gigabit
* Plug the device in and wait for the bootloader to flash
* Unplug and replug the device once the power LED blinks amber

Revert to Stock:
The boot command needs to be reverted before flashing the stock firmware,
otherwise it will fail to boot and get stuck in recovery mode (red power
LED flashing).

* Run: fw_setenv bootcmd bootipq
* Restart the device
* Flash the stock firmware RBx750-Va.b.c.d.img using nmrpflash

[0]: https://github.com/jclehner/nmrpflash

Signed-off-by: Michael Lotz <mmlr@mlotz.ch>
Link: openwrt/openwrt#21938
Signed-off-by: Robert Marko <robimarko@gmail.com>

Author: mmlr

package/boot/uboot-tools/uboot-envtools/files/qualcommax_ipq807x

@@ -40,6 +40,8 @@ qnap,301w)
 	;;
 dynalink,dl-wrx36|\
 netgear,rax120v2|\
+netgear,rbr750|\
+netgear,rbs750|\
 netgear,sxr80|\
 netgear,sxs80|\
 netgear,wax218|\

package/firmware/ipq-wifi/Makefile

@@ -68,6 +68,7 @@ ALLWIFIBOARDS:= \
 	netgear_rax120v2 \
 	netgear_rbk20 \
 	netgear_rbk40 \
+	netgear_rbk750 \
 	netgear_sxk80 \
 	netgear_wax214 \
 	netgear_wax218 \
@@ -256,6 +257,7 @@ $(eval $(call generate-ipq-wifi-package,netgear_lbr20,Netgear LBR20))
 $(eval $(call generate-ipq-wifi-package,netgear_rax120v2,Netgear RAX120v2))
 $(eval $(call generate-ipq-wifi-package,netgear_rbk20,Netgear RBK20))
 $(eval $(call generate-ipq-wifi-package,netgear_rbk40,Netgear RBK40))
+$(eval $(call generate-ipq-wifi-package,netgear_rbk750,Netgear RBK750))
 $(eval $(call generate-ipq-wifi-package,netgear_sxk80,Netgear SXK80))
 $(eval $(call generate-ipq-wifi-package,netgear_wax214,Netgear WAX214))
 $(eval $(call generate-ipq-wifi-package,netgear_wax218,Netgear WAX218))

target/linux/qualcommax/files/arch/arm64/boot/dts/qcom/ipq8074-rbr750.dts

@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright (c) 2026 Michael Lotz <mmlr@mlotz.ch>
+ */
+
+/dts-v1/;
+
+#include "ipq8074-rbx750.dtsi"
+
+/ {
+	model = "Netgear RBR750";
+	compatible = "netgear,rbr750", "qcom,ipq8074";
+};

target/linux/qualcommax/files/arch/arm64/boot/dts/qcom/ipq8074-rbs750.dts

@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright (c) 2026 Michael Lotz <mmlr@mlotz.ch>
+ */
+
+/dts-v1/;
+
+#include "ipq8074-rbx750.dtsi"
+
+/ {
+	model = "Netgear RBS750";
+	compatible = "netgear,rbs750", "qcom,ipq8074";
+};
+
+&dp1 {
+	status = "disabled";
+};
+
+&dp2 {
+	status = "disabled";
+};

target/linux/qualcommax/files/arch/arm64/boot/dts/qcom/ipq8074-rbx750.dtsi

@@ -0,0 +1,292 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright (c) 2026 Michael Lotz <mmlr@mlotz.ch>
+ */
+
+/dts-v1/;
+
+#include "ipq8074.dtsi"
+#include "ipq8074-hk-cpu.dtsi"
+#include "ipq8074-ess.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/leds/common.h>
+
+/ {
+	aliases {
+		led-boot = &lp5562_white;
+		led-failsafe = &lp5562_red;
+		led-upgrade = &lp5562_blue;
+		serial0 = &blsp1_uart5;
+		label-mac-device = &dp5;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+		bootargs-append = " ubi.mtd=rootfs root=/dev/ubiblock0_1";
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			gpios = <&tlmm 33 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+
+		wps {
+			label = "wps";
+			gpios = <&tlmm 34 GPIO_ACTIVE_HIGH>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		power_green {
+			gpios = <&tlmm 54 GPIO_ACTIVE_LOW>;
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_POWER;
+			linux,default-trigger = "default-on";
+		};
+
+		power_red {
+			gpios = <&tlmm 56 GPIO_ACTIVE_LOW>;
+			color = <LED_COLOR_ID_RED>;
+			function = LED_FUNCTION_POWER;
+		};
+	};
+};
+
+&blsp1_uart5 {
+	status = "okay";
+};
+
+&prng {
+	status = "okay";
+};
+
+&cryptobam {
+	status = "okay";
+};
+
+&crypto {
+	status = "okay";
+};
+
+&edma {
+	status = "okay";
+};
+
+&tlmm {
+	mdio_pins: mdio-pins {
+		mdc {
+			pins = "gpio68";
+			function = "mdc";
+			drive-strength = <8>;
+			bias-pull-up;
+		};
+
+		mdio {
+			pins = "gpio69";
+			function = "mdio";
+			drive-strength = <8>;
+			bias-pull-up;
+		};
+	};
+};
+
+&switch {
+	status = "okay";
+
+	switch_lan_bmp = <(ESS_PORT2 | ESS_PORT4 | ESS_PORT5)>;
+	switch_wan_bmp = <ESS_PORT1>;
+	switch_mac_mode = <MAC_MODE_PSGMII>;
+
+	qcom,port_phyinfo {
+		port@1 {
+			port_id = <1>;
+			phy_address = <0>;
+		};
+
+		port@2 {
+			port_id = <2>;
+			phy_address = <1>;
+		};
+
+		port@4 {
+			port_id = <4>;
+			phy_address = <3>;
+		};
+
+		port@5 {
+			port_id = <5>;
+			phy_address = <4>;
+		};
+	};
+};
+
+&mdio {
+	status = "okay";
+	pinctrl-0 = <&mdio_pins>;
+	pinctrl-names = "default";
+	reset-gpios = <&tlmm 37 GPIO_ACTIVE_LOW>;
+
+	ethernet-phy-package@0 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "qcom,qca8075-package";
+		reg = <0>;
+
+		phy0: ethernet-phy@0 {
+			compatible = "ethernet-phy-ieee802.3-c22";
+			reg = <0>;
+		};
+
+		phy1: ethernet-phy@1 {
+			compatible = "ethernet-phy-ieee802.3-c22";
+			reg = <1>;
+		};
+
+		phy3: ethernet-phy@3 {
+			compatible = "ethernet-phy-ieee802.3-c22";
+			reg = <3>;
+		};
+
+		phy4: ethernet-phy@4 {
+			compatible = "ethernet-phy-ieee802.3-c22";
+			reg = <4>;
+		};
+	};
+};
+
+&dp1 {
+	status = "okay";
+	phy-handle = <&phy0>;
+	label = "wan";
+	nvmem-cell-names = "mac-address";
+	nvmem-cells = <&macaddr_boarddata 1>;
+};
+
+&dp2 {
+	status = "okay";
+	phy-handle = <&phy1>;
+	label = "lan3";
+	nvmem-cell-names = "mac-address";
+	nvmem-cells = <&macaddr_boarddata 2>;
+};
+
+&dp4 {
+	status = "okay";
+	phy-handle = <&phy3>;
+	label = "lan2";
+	nvmem-cell-names = "mac-address";
+	nvmem-cells = <&macaddr_boarddata 1>;
+};
+
+&dp5 {
+	status = "okay";
+	phy-handle = <&phy4>;
+	label = "lan1";
+	nvmem-cell-names = "mac-address";
+	nvmem-cells = <&macaddr_boarddata 0>;
+};
+
+&qpic_bam {
+	status = "okay";
+};
+
+&qpic_nand {
+	status = "okay";
+
+	nand@0 {
+		reg = <0>;
+		nand-ecc-strength = <4>;
+		nand-ecc-step-size = <512>;
+		nand-bus-width = <8>;
+
+		partitions {
+			compatible = "qcom,smem-part";
+
+			partition-board_data {
+				label = "board_data";
+
+				nvmem-layout {
+					compatible = "fixed-layout";
+					#address-cells = <1>;
+					#size-cells = <1>;
+
+					macaddr_boarddata: macaddr@40 {
+						compatible = "mac-base";
+						reg = <0x40 0x6>;
+						#nvmem-cell-cells = <1>;
+					};
+				};
+			};
+
+			partition-0-appsblenv {
+				label = "0:appsblenv";
+
+				nvmem-layout {
+					compatible = "u-boot,env";
+					env-size = <0x40000>;
+				};
+			};
+		};
+	};
+};
+
+&wifi {
+	status = "okay";
+	qcom,ath11k-calibration-variant = "Netgear-RBK750";
+};
+
+&blsp1_i2c2 {
+	status = "okay";
+
+	lp5562@31 {
+		compatible = "ti,lp5562";
+		reg = <0x31>;
+		clock-mode = [02];
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		lp5562_red: led@0 {
+			chan-name = "lp5562_red";
+			led-cur = [20];
+			max-cur = [60];
+			color = <LED_COLOR_ID_RED>;
+			function = LED_FUNCTION_STATUS;
+			reg = <0>;
+		};
+
+		lp5562_green: led@1 {
+			chan-name = "lp5562_green";
+			led-cur = [20];
+			max-cur = [60];
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_STATUS;
+			reg = <1>;
+		};
+
+		lp5562_blue: led@2 {
+			chan-name = "lp5562_blue";
+			led-cur = [20];
+			max-cur = [60];
+			color = <LED_COLOR_ID_BLUE>;
+			function = LED_FUNCTION_STATUS;
+			reg = <2>;
+		};
+
+		lp5562_white: led@3 {
+			chan-name = "lp5562_white";
+			led-cur = [20];
+			max-cur = [60];
+			color = <LED_COLOR_ID_WHITE>;
+			function = LED_FUNCTION_STATUS;
+			reg = <3>;
+		};
+	};
+};