NO /dev/tee* device in verdin-imx8mp board in yocto project

[008kai]

In yocto local.conf I added:

DISTRO_FEATURES_append=" optee"
IMAGE_INSTALL_append = " optee-client-imx optee-os-imx-tn optee-test-imx"
and in imx8mp-verdin-u-boot.dtsi I added:

firmware {

       optee {
       compatible = "linaro,optee-tz";
       method = "smc";
      };
};

but I still can not find the device /dev/tee ?

Which step am I wrong, or what is missing?

Thanks

[Zhiming_Liu]

Yocto:

MACHINE_FEATURES += "optee"
DISTRO_FEATURES += "optee"
IMAGE_INSTALL += "optee-test optee-os optee-client"

Linux config:

CONFIG_OPTEE=y

[008kai]

Thank you for your reply. I modified it according to the steps you mentioned, but still encountered the following error:

I am using the verdin-imx8mp development board, is it caused by the lack of some steps? thanks