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

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Date:	Thu, 10 Mar 2011 23:13:05 +0800
From:	"Lai, Mee Sim" <mee.sim.lai@...el.com>
To:	Tomoya MORINAGA <tomoya-linux@....okisemi.com>,
	'Grant Likely' <grant.likely@...retlab.ca>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Ewe, Kok Howg" <kok.howg.ewe@...el.com>,
	'Toshiharu Okada' <toshiharu-linux@....okisemi.com>
Subject: RE: About GPIO interrupt function with sysfs

Hi Grant,
Is there any update on this? thanks!

Thanks & Regards,
Michelle Lai Mee Sim
Software Platform Application Engineer
inet:82532218

-----Original Message-----
From: Tomoya MORINAGA [mailto:tomoya-linux@....okisemi.com] 
Sent: Friday, March 04, 2011 8:06 AM
To: 'Grant Likely'
Cc: linux-kernel@...r.kernel.org; Ewe, Kok Howg; Lai, Mee Sim; 'Toshiharu Okada'
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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