* Lokesh Vutla <lokeshvutla@xxxxxx> [190214 08:39]: > IMHO, device ids are something which can be used in DT. There are many other > things like the interrupt ranges etc.. which are discoverable from sysfw and we > are implementing it. We need to describe hardware in the device tree, not firmware. If you have something discoverable from the firmware, you should have the device driver query it from sysfw based on a hardware property, not based on some invented enumeration in the firmware. If there is some device to firmware translation needed, hide that into the device driver and keep it out of the device tree. For example, look at the interrupt binding where the interrupt is phandle to the controller and the bit offset from the interrupt controller instance. You need to use device IO address + bit offset (or register offset) type indexing for device tree here. Something out of the TRM that makes sense to developers. Regards, Tony
