firmware

i2c_firmware/README.md

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+# OpenWRT 24.10.4 Firmware with GPIO I²C for GL.iNet XE300
+
+Custom OpenWRT build enabling **GPIO-based I²C master** on the GL.iNet XE300 (QCA9531) using `i2c-gpio` driver and clean DTS integration.
+
+## Locate & Edit DTS
+
+target/linux/ath79/dts/qca9531_glinet_gl-xe300.dts
+
+git clone https://git.openwrt.org/openwrt/openwrt.git
+cd openwrt
+git checkout v24.10.4
+./scripts/feeds update -a
+./scripts/feeds install -a
+
+## Menu Config
+
+Target System: Atheros ATH79
+Target Profile: GL.iNet GL-XE300
+Kernel Modules → I2C Support:
+kmod-i2c-core
+kmod-i2c-gpio
+Utilities → i2c-tools
+
+make -j$(nproc)
+
+## Test It
+
+ls /dev/i2c-*
+i2cdetect -y 0
+cat /sys/kernel/debug/gpio
+i2cdump -y 0 0x48  # Adjust address accordingly
+
+
+Ubuntu 22.04+ build tools:
+
+```bash
+sudo apt update && sudo apt install -y \
+  build-essential clang flex bison g++ gawk gcc-multilib \
+  g++-multilib gettext libncurses-dev libssl-dev python3 \
+  python3-pip rsync unzip zlib1g-dev file wget git
+

i2c_firmware/qca9531_glinet_gl-xe300.dts

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+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "qca953x.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/leds/common.h>
+
+/ {
+	compatible = "glinet,gl-xe300", "qca,qca9531";
+	model = "GL.iNet GL-XE300";
+
+	aliases {
+		label-mac-device = &eth0;
+	};
+
+	gpio-export {
+		compatible = "gpio-export";
+
+		gpio_lte_power {
+			gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;
+			gpio-export,name = "lte_power";
+			gpio-export,output = <1>;
+		};
+
+		gpio_sd_detect {
+			gpios = <&gpio 17 GPIO_ACTIVE_LOW>;
+			gpio-export,name = "sd_detect";
+			gpio-export,output = <0>;
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&jtag_disable_pins>;
+
+		reset {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&gpio 3 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		lan {
+			gpios = <&gpio 10 GPIO_ACTIVE_LOW>;
+			function = LED_FUNCTION_LAN;
+			color = <LED_COLOR_ID_GREEN>;
+		};
+
+		wan {
+			gpios = <&gpio 1 GPIO_ACTIVE_LOW>;
+			function = LED_FUNCTION_WAN;
+			color = <LED_COLOR_ID_GREEN>;
+		};
+
+		wlan {
+			gpios = <&gpio 12 GPIO_ACTIVE_LOW>;
+			function = LED_FUNCTION_WLAN;
+			color = <LED_COLOR_ID_GREEN>;
+			linux,default-trigger = "phy0tpt";
+		};
+
+		lte {
+			gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
+			label = "green:lte";
+		};
+	};
+
+	i2c_gpio: i2c@0 {
+		compatible = "i2c-gpio";
+		gpios = <&gpio 15 GPIO_ACTIVE_HIGH
+		         &gpio 4  GPIO_ACTIVE_HIGH>;
+		i2c-gpio,delay-us = <5>;
+		i2c-gpio,timeout-ms = <100>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		status = "okay";
+	};
+};
+
+&pcie0 {
+	status = "okay";
+};
+
+&usb0 {
+	status = "okay";
+};
+
+&usb_phy {
+	status = "okay";
+};
+
+&spi {
+	status = "okay";
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <25000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "u-boot";
+				reg = <0x0 0x40000>;
+				read-only;
+			};
+
+			partition@40000 {
+				label = "u-boot-env";
+				reg = <0x40000 0x10000>;
+			};
+
+			partition@50000 {
+				label = "art";
+				reg = <0x50000 0x10000>;
+				read-only;
+
+				nvmem-layout {
+					compatible = "fixed-layout";
+					#address-cells = <1>;
+					#size-cells = <1>;
+
+					macaddr_art_0: macaddr@0 {
+						compatible = "mac-base";
+						reg = <0x0 0x6>;
+						#nvmem-cell-cells = <1>;
+					};
+
+					cal_art_1000: calibration@1000 {
+						reg = <0x1000 0x440>;
+					};
+				};
+			};
+
+			partition@60000 {
+				label = "kernel";
+				reg = <0x60000 0x400000>;
+			};
+
+			partition@460000 {
+				label = "nor_reserved";
+				reg = <0x460000 0xba0000>;
+			};
+		};
+	};
+
+	flash@1 {
+		compatible = "spi-nand";
+		reg = <1>;
+		spi-max-frequency = <25000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "ubi";
+				reg = <0x0 0x8000000>;
+			};
+		};
+	};
+};
+
+&eth0 {
+	status = "okay";
+
+	phy-handle = <&swphy4>;
+
+	nvmem-cells = <&macaddr_art_0 0>;
+	nvmem-cell-names = "mac-address";
+};
+
+&eth1 {
+	nvmem-cells = <&macaddr_art_0 1>;
+	nvmem-cell-names = "mac-address";
+};
+
+&wmac {
+	status = "okay";
+
+	nvmem-cells = <&cal_art_1000>;
+	nvmem-cell-names = "calibration";
+};
+