On Fri, Aug 7, 2015 at 4:21 AM, Greg Kroah-Hartman
[off-list ref] wrote:

On Mon, Aug 03, 2015 at 08:09:35PM +0100, Russell King - ARM Linux wrote:

quoted

Right now, there seems to be a move to convert _all_ AMBA device drivers
to become dual-drivers: an amba bus driver and a platform driver.  Is
that something you really want to see, irrespective of ACPI issues?

Ick, no, I don't think that's wise at all.  Why not just make the needed
resources availble to _all_ bus drivers, then it doesn't matter if it's
AMBA, or ACPI, or USB, or anything else?

Amen to that.

I thought that is what some recent patches did to the acpi/of core, but
maybe I was mistaken.

I think you're referring to the initiative to provide query functions that will
work the same on device trees and ACPI devices, that is to get a key/value
from a certain struct device * no matter if it came from a DT or ACPI.

This is about how the core hardware description spawns devices. While
DT will (correctly) spawn AMBA devices, the ACPI code apparently
doesn't. But it should. of_amba_device_create() even shows exactly
how to do it.

What I fear is that ACPI actually has no way to tell whether a device is
an AMBA device but rather thinks the whole world consists of
platform_devices, and then *THAT* needs to be fixed.

Yours,
Linus Walleij