一、解压optee的源码压缩包

tar xf optee-os-stm32mp-3.16.0-stm32mp-r2-r0.tar.xz
cd optee-os-stm32mp-3.16.0-stm32mp-r2
tar xf ../fonts.tar.gz
for p in `ls -1 ../*.patch`; do patch -p1 < $p; done

二、拷贝新的设备树文件

cp optee-os-stm32mp-3.16.0-stm32mp-r2/core/arch/arm/dts/stm32mp13-pinctrl.dtsi optee-os-stm32mp-3.16.0-stm32mp-r2/core/arch/arm/dts/stm32mp13-pinctrl-atk.dtsi
cp optee-os-stm32mp-3.16.0-stm32mp-r2/core/arch/arm/dts/stm32mp135f-dk.dts optee-os-stm32mp-3.16.0-stm32mp-r2/core/arch/arm/dts/stm32mp135d-atk.dts

三、修改Makefile.sdk文件

（1）增加stm32mp135d-atk设备树编译

（2）修改编译器为arm-none-linux-gnueabihf

（3）使用buildroot工具链，且不编译FIP选项

（4）只编译stm32mp135-atk设备树

四、修改设备树相关文件

（1）修改编译配置文件

1、文件路径：optee-os-stm32mp-3.16.0-stm32mp1-r1/core/arch/arm/plat-stm32mp1/conf.mk

（2）设备树移除MCO时钟输出

1、文件路径：optee-os-stm32mp-3.16.0-stm32mp1-r1/core/arch/arm/dts/stm32mp135d-atk.dts

（3）解除poweroff关机后系统通过watchdog重启

1、文件路径：optee-os-stm32mp-3.16.0-stm32mp1-r1/core/arch/arm/dts/stm32mp135d-atk.dts

（4）调试串口UART4 RX引脚开启内部上拉

1、文件路径：optee-os-stm32mp-3.16.0-stm32mp1-r1/core/arch/arm/dts/stm32mp13-pinctrl-atk.dtsi

（5）添加有源晶振配置

1、文件路径：optee-os-stm32mp-3.16.0-stm32mp1-r1/core/arch/arm/dts/stm32mp135d-atk.dts