linux-kernel - Re: [PATCH] pinctrl-baytrail: add function mux checking in gpio pin request

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Message-ID: <20140311103641.GX5018@intel.com>
Date:	Tue, 11 Mar 2014 12:36:41 +0200
From:	Mika Westerberg <mika.westerberg@...ux.intel.com>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	Chew Chiau Ee <chiau.ee.chew@...el.com>,
	Mathias Nyman <mathias.nyman@...ux.intel.com>,
	Darren Hart <dvhart@...ux.intel.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] pinctrl-baytrail: add function mux checking in gpio pin
 request

On Tue, Mar 11, 2014 at 11:27:13AM +0100, Linus Walleij wrote:
> On Thu, Mar 6, 2014 at 2:59 PM, Chew Chiau Ee <chiau.ee.chew@...el.com> wrote:
> 
> > From: Chew, Kean Ho <kean.ho.chew@...el.com>
> >
> > The requested gpio pin must has the func_pin_mux field set
> > to GPIO function by BIOS/FW in advanced. Else, the gpio pin
> > request would fail. This is to ensure that we do not expose
> > any gpio pins which shall be used for alternate functions,
> > for eg: wakeup pin, I/O interfaces for LPSS, etc.
> >
> > Signed-off-by: Chew, Kean Ho <kean.ho.chew@...el.com>
> > Signed-off-by: Chew, Chiau Ee <chiau.ee.chew@...el.com>
> 
> Patch applied with Darren's ACK.
> 
> This confirms my suspicion that you will not be able to
> hide the pin control interface side of this hardware forever. ;-)
> 
> Mika/Mathias: any comments?

No comments, looks good to me :)
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