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

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Date:	Mon, 27 Sep 2010 23:38:19 -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 R.$B�K.(Bfors" 
	<richard.rojfors@...ean-labs.com>, meego-dev@...go.com,
	"ML linux-kernel" <linux-kernel@...r.kernel.org>,
	"Wang, Qi" <qi.wang@...el.com>, andrew.chih.howe.khor@...el.com,
	gregkh@...e.de, "Wang, Yong Y" <yong.y.wang@...el.com>,
	"Tomoya MORINAGA" <morinaga526@....okisemi.com>
Subject: Re: [MeeGo-Dev][PATCH] Topcliff: Update PCH_GPIO driver to 2.6.35

On Monday, September 27, 2010 23:21:10 Masayuki Ohtake wrote:
> > You should be implementing support for the device using the
> > standard interfaces used by the other GPIO drivers in kernel.
> 
> We are now modifying our GPIO driver with standard interface.
> I've got a bit of problem.
> 
> I don't understand how userspace accesses to the driver.
> Let me know how to ? sysfs only ?

sysfs only.  look at GPIO_SYSFS in drivers/gpio/.  support the common GPIO 
framework and the userspace API is taken care of for you.
-mike

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