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The FDT_ERR_NOTFOUND error you’re encountering when applying the device tree overlay on Torizon OS 7 is likely due to compatibility issues between the overlay and the base device tree blob (DTB) for the imx8mp-verdin-wifi-dahlia.dtb. Here are some steps and considerations to help resolve this issue:
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Compatibility Check: Ensure that the overlay is compatible with the DTB used in Torizon OS 7. The overlay might have been compatible with Torizon OS 6, but changes in the device tree structure or requirements in Torizon OS 7 could cause incompatibility.
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Review Overlay and DTB: Examine the overlay and the base DTB to ensure that all nodes and properties expected by the overlay are present in the DTB. The error suggests that the overlay is trying to reference nodes or properties that do not exist in the DTB.
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Update Overlay Definitions: Check the
compatibleproperty in the overlay to ensure it matches thecompatibleproperty of the base device tree. This is crucial for the overlay to be applied correctly. -
Investigate Changes in Torizon OS: Look into any changes in the device tree structure between Torizon OS 6 and Torizon OS 7 that might affect the overlay application. This could involve changes in node names, paths, or required properties.
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Modify Overlay or DTB: Depending on your findings, you may need to modify the overlay to align with the current DTB or update the DTB to support the overlay. This might involve adding missing nodes or properties to the DTB or adjusting the overlay to match the new structure.
By following these steps, you should be able to identify and resolve the cause of the FDT_ERR_NOTFOUND error. If the issue persists, further investigation into the specific changes between the Torizon OS versions and the device tree configurations may be necessary.
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