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[v5.10] btmtksdio: get bdaddr from dts when available

Fabien Parent requested to merge fparent/linux-mtk:btmtksdio-bdaddr-from-dts into mtk-v5.10

Some boards we have comes with MT7663 with blank efuses, which means no BD address are programmed. The Bluetooth stack is not able to handle a invalid BD address.

On MT7668 we were able to program the efuses but we are not (yet?) able to on MT7663 so we need a backup solution in order to have a bluetooth functional.

This MR is adding the ability to set a MAC address via the device-tree. U-Boot will patch the device-tree based on its eth(X)addr variable.

The MAC address from the device-tree has the highest priority, but is optional.

This was tested on:

  • i350-sb35
  • i500-pumpkin
  • i300a-pumpkin

The test consisted in checking whether each board is using the correct MAC address using hciconfig.

Edited by Fabien Parent

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