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
+