linux-kernel - Re: [PATCH v3 1/1] pinctrl: add Intel BayTrail GPIO/pinctrl support

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Message-ID: <20140424115848.GG30677@intel.com>
Date:	Thu, 24 Apr 2014 14:58:48 +0300
From:	"Westerberg, Mika" <mika.westerberg@...el.com>
To:	Timur Tabi <timur@...eaurora.org>
Cc:	Mathias Nyman <mathias.nyman@...ux.intel.com>,
	Linus <linus.walleij@...aro.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	lkml <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Subject: Re: [PATCH v3 1/1] pinctrl: add Intel BayTrail GPIO/pinctrl support

On Thu, Apr 24, 2014 at 06:18:38AM -0500, Timur Tabi wrote:
> Westerberg, Mika wrote:
> >>>That is, when the kernel parses the ASL, and it seems a command to
> >>>configure pin #3 to function #4, it calls the local pinctrl driver to do
> >>>that?
> 
> >I'm not aware of ASL code that allows you to do that. Do you have examples?
> 
> No, that's my point.  I was expecting the pinmux functions of the
> pinctrl driver are used by ACPI, but apparently they aren't, and
> that's why I'm asking.

Which functions?

> I'm wondering why a pinctrl driver for an
> ACPI platform should be defining pinmux function groups.  I haven't
> gotten a straight answer to that question.

Are you asking why pinctrl-baytrail.c uses pinctrl_gpio_ranges even if it
is a pretty much standard GPIO driver? Mathias probably can answer that
question better than me.
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