linux-kernel - RE: About GPIO interrupt function with sysfs

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Message-ID: <2BC88E699A3D491E8B7C2B761F8296C7@hacdom.okisemi.com>
Date:	Fri, 4 Mar 2011 09:06:25 +0900
From:	"Tomoya MORINAGA" <tomoya-linux@....okisemi.com>
To:	"'Grant Likely'" <grant.likely@...retlab.ca>
Cc:	<linux-kernel@...r.kernel.org>,
	"'Ewe, Kok Howg'" <kok.howg.ewe@...el.com>,
	"'Lai, Mee Sim'" <mee.sim.lai@...el.com>,
	"'Toshiharu Okada'" <toshiharu-linux@....okisemi.com>
Subject: RE: About GPIO interrupt function with sysfs

Hi Grant, 

On Friday, March 04, 2011 3:57 AM, Grant Likely wrote:
> I don't know.  I'll need to dig into that code before I can 
> answer.  I suggest digging into it yourself to figure out the 
> answer as I cannot promise that I'll get to it anytime soon.

Seeing "gpio_to_irq" of another architecture (e.g. ARM), there is significant code in it.
In addition, you can see "Not implemented, yet" description in "arch/x86/include/asm/gpio.h"
Thus, I suspect that x86 GPIO sysfs can't support interrupt function at present.

Thanks,
-----------------------------------------
Tomoya MORINAGA
OKI SEMICONDUCTOR CO., LTD.

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