RFC Consolidation: move SMP local timers to driver/clocksource

Quoted 15 lines · Marc Zyngier

Quoted 14 lines · Rob Herring

Marc,

Quoted 10 lines · Marc Zyngier

Quoted 2 lines · Rob Herring

Also, device tree support for early platform devices would be useful for this.

What about the attached patch? I've used it to boot a VExpress board with the following DT snippet (and the corresponding support in the amp_smp_twd driver):

	localtimer at 2c000600 {
		device_type = "localtimer";

Quoted 8 lines

Quoted 4 lines

My understanding is device_type is only supposed to be used for devices with real OpenFirmware. You could just add localtimer or timer as a 2nd compatible string. I think localtimer is a bit of a Linux name, so just timer may be better.

Using "compatible" would not work. You'd have to add the same compatible string to all drivers, and get drivers probing the wrong device. Any other property we could use instead?

No, I'm saying you have a compatible property like this:

compatible = "arm,smp-twd", "timer";

You create the early platform device(s) based on matches with "timer", but match the driver based on "arm,smp-twd".