linux-kernel - Re: [MeeGo-Dev][PATCH] Topcliff: Update PCH

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Message-ID: <AANLkTi=PvwA81YiZszUu2B=rDoBhduJwdWv2CrYWWu+f@mail.gmail.com>
Date:	Tue, 28 Sep 2010 01:32:20 -0400
From:	Mike Frysinger <vapier@...too.org>
To:	Masayuki Ohtake <masa-korg@....okisemi.com>
Cc:	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Alek Du <alek.du@...el.com>, richard.rojfors@...ean-labs.com,
	meego-dev@...go.com,
	ML linux-kernel <linux-kernel@...r.kernel.org>,
	Qi <qi.wang@...el.com>, andrew.chih.howe.khor@...el.com,
	gregkh@...e.de, Yong Y <yong.y.wang@...el.com>,
	Tomoya MORINAGA <morinaga526@....okisemi.com>,
	joel.clark@...el.com, margie.foster@...el.com,
	kok.howg.ewe@...el.com
Subject: Re: [MeeGo-Dev][PATCH] Topcliff: Update PCH_GPIO driver to 2.6.35

On Tue, Sep 28, 2010 at 01:25, Masayuki Ohtake wrote:
>> find out what range of GPIO numbers your driver is using and use those
>> instead of "1"
>
> I have attached a part of our source file.
>
> Since I set "ngpio=12",
> I guess 0-11 can be used, thus, "echo 1 > export" should be success too.
> Is this true ?

there are often multiple gpio sources in a system.  whichever one is
registered first (usually the arch/cpu specific one) tends to start at
0.

i'm merely providing generic gpio information.  i know nothing of your
specific arch/cpu/board setup.  you'll have to do some
digging/debugging on your side.
-mike
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