Add overlay callback functionality.
When DT overlays are being added, some drivers/subsystems
will want to know about the changes before they go into the
live tree. Similarly there is a need for post-remove
callbacks.
Each handler is registered with a of_device_id. When
an overlay target
Add overlay callback functionality.
When DT overlays are being added, some drivers/subsystems
will want to know about the changes before they go into the
live tree. Similarly there is a need for post-remove
callbacks.
Each handler is registered with a of_device_id. When
an overlay target
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