linux-kernel - Re: [PATCH 1/3] gpio / ACPI: add ACPI support

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Date:	Wed, 7 Nov 2012 10:54:58 +0200
From:	Mika Westerberg <mika.westerberg@...ux.intel.com>
To:	Linus Walleij <linus.walleij@...aro.org>, grant.likely@...retlab.ca
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Mathias Nyman <mathias.nyman@...ux.intel.com>,
	linux-kernel@...r.kernel.org, lenb@...nel.org,
	rafael.j.wysocki@...el.com, broonie@...nsource.wolfsonmicro.com,
	khali@...ux-fr.org, ben-linux@...ff.org, w.sang@...gutronix.de,
	linux-acpi@...r.kernel.org
Subject: Re: [PATCH 1/3] gpio / ACPI: add ACPI support

On Tue, Nov 06, 2012 at 11:15:21AM +0100, Linus Walleij wrote:
> On Tue, Nov 6, 2012 at 10:39 AM, Mika Westerberg
> <mika.westerberg@...ux.intel.com> wrote:
> > On Mon, Nov 05, 2012 at 03:40:14PM +0100, Linus Walleij wrote:
> >> > I forgot to mention that we want to hook up _existing_ drivers to those things,
> >> > and they already use the global GPIO numbers, don't they?
> >>
> >> Yes they do, usually this is either passed from the platform using platform
> >> data or handled by device tree lookups to individual drivers.
> >>
> >> So you will have to modify each such existing driver to do ACPI
> >> probe akin to the DT codepath and call acpi_get_gpio() on every pin they
> >> need going forward. But that is the plan I guess.
> >
> > Yes, that's the plan.
> >
> > Do you think it is OK to go with this implementation (acpi_get_gpio()) for
> > now? We will try to make sure that the gpio_get() (or whatever it will be
> > called that time) supports ACPI as well.
> 
> Yes I'll be OK with it but I don't dare to merge it unless Grant
> ACKs it.

Is that an Ack from you? ;-)

Since there is a dependency to linux-pm tree (we use the new
dev->acpi_handle member) I would like this series merged via that tree.

Grant, are you OK with this?
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