how to config jetson orin linux kernel can gpio device-tree-Go服务器开发

To configure Jetson Orin Linux kernel for GPIO device tree, follow these steps:

Download and install the latest version of JetPack SDK from the NVIDIA website.
Set up your development environment by opening a terminal window and navigating to the root directory of your Jetson Orin system.
Clone the Linux kernel source code repository by running the following command:

   git clone https://github.com/NVIDIA/linux.git

Configure the kernel build options by running the following command:

   make ARCH=arm64 O=build/jetson_orin_defconfig tegra_defconfig

Modify the device tree configuration file located at linux/arch/arm64/boot/dts/tegra194-jetson-xavier-nx-devkit.dts to add GPIO support. Add the following code snippet inside the gpio@2200000 node:

   gpio-keys {
           compatible = "gpio-keys";
           #address-cells = <1>;
           #size-cells = <0>;

           button@8 {
                   label = "gpio-key";
                   gpios = <&gpio TEGRA194_MAIN_GPIO(O, 1) GPIO_ACTIVE_LOW>;
                   linux,code = <KEY_POWER>;
           };
   };

Save and close the device tree configuration file.
Build the Linux kernel by running the following command:

   make ARCH=arm64 O=build Image tegra194-jetson-xavier-nx-devkit.dtb modules

Install the new kernel by copying the generated image and device tree blob to the boot partition of your Jetson Orin system:

   sudo cp build/Image /boot/Image
   sudo cp build/tegra194-jetson-xavier-nx-devkit.dtb /boot/tegra194-jetson-xavier-nx-devkit.dtb

Reboot your Jetson Orin system and verify that GPIO support has been added by running the ls /sys/class/gpio command.
You can now use the echo command and file system interface to control the GPIOs on your Jetson Orin board.