Description

This document describes how to enable the EC20-4G module function by modifying the device tree in the SDK.

Device Tree Description

The main device tree file for TaishanPi-3M is:

• kernel-6.1/arch/arm64/boot/dts/rockchip/tspi-3m-rk3576.dts

This file contains many .dtsi files. These .dtsi files are pre-defined hardware configuration files. To make it easy for you to use and modify, each functional interface has been split into a separate .dtsi file.

Device Tree Modification

Open kernel-6.1/arch/arm64/boot/dts/rockchip/tspi-3m-rk3576.dts, find the following code snippet:

// #include "tspi-3m-rk3576-ec20-4g.dtsi"

Uncomment it to enable the EC20-4G module function:

#include "tspi-3m-rk3576-ec20-4g.dtsi"

Precautions

When enabling tspi-3m-rk3576-ec20-4g.dtsi in this type, make sure:

• tspi-3m-rk3576-pcie.dtsi is commented out.
• tspi-3m-rk3576-sata.dtsi is commented out.

Compile Kernel and Flash

All other files required for using the EC20-4G module have been integrated into the SDK for you. You only need to recompile the kernel. Refer to Kernel Compilation 🚀 chapter for compilation, then flash the kernel image separately.

Testing and Verification

For specific testing, refer to: Debian12 EC20-4G Module Usage 🚀 chapter.