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

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Message-ID: <5358F362.6080006@codeaurora.org>
Date:	Thu, 24 Apr 2014 06:20:02 -0500
From:	Timur Tabi <timur@...eaurora.org>
To:	"Westerberg, Mika" <mika.westerberg@...el.com>,
	Linus Walleij <linus.walleij@...aro.org>
CC:	Mathias Nyman <mathias.nyman@...ux.intel.com>,
	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

Westerberg, Mika wrote:
> Typically this is done by the boot firmware (BIOS in this case). So the OS
> doesn't need to deal with that.
>
> AFAICT ACPI doesn't know anything about pin muxing.

In that case, would it be correct to say that a Linux pinctrl driver for 
an ACPI-only platform should not define pinmux function groups, because 
they'll never be used?

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