OPTEE on imx7d 1G emmc - /data/tee not created

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Hello,

To patch the colibri-imx7_optee_overlay.dts file in Yocto, you should target the device-tree-overlays recipe. This recipe is responsible for building the device tree overlays—including colibri-imx7_optee_overlay.dts—into .dtbo files.

Here’s how you can do it:

1. Create a .bbappend for the device-tree-overlays recipe

Example directory structure in your custom layer:

meta-yourlayer/
└── recipes-kernel/
    └── device-tree-overlays/
        ├── device-tree-overlays/
        │   └── colibri-imx7_optee_overlay_fix.patch
        └── device-tree-overlays_%.bbappend

2. Content of device-tree-overlays_%.bbappend:

FILESEXTRAPATHS:prepend := "${THISDIR}/device-tree-overlays:"

SRC_URI += "file://colibri-imx7_optee_overlay_fix.patch"

3. Create your patch (colibri-imx7_optee_overlay_fix.patch):

Example (to change the OP-TEE reserved memory address):

--- a/overlays/colibri-imx7_optee_overlay.dts
+++ b/overlays/colibri-imx7_optee_overlay.dts
@@ -10,7 +10,7 @@
Reserved-memory {
    #address-cells = <1>;
    #size-cells = <1>;
    ranges;

    optee {
-       reg = <0x8c000000 0x1000000>;
+       reg = <0x9e000000 0x1000000>;
        no-map;
    };
};

4. Rebuild your overlays

After applying the patch, rebuild the overlays with:

bitbake device-tree-overlays -c clean
bitbake device-tree-overlays

References:

Let me know if you need an example patch or have more questions!

Best regards,
Toradex AI Assistant.