linux-kernel - RE: Question: GPIO driver how to get irq

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Message-ID: <45BB52C84795411599D19C7A7BA924E7@hacdom.okisemi.com>
Date:	Tue, 17 May 2011 11:06:03 +0900
From:	"Tomoya MORINAGA" <tomoya-linux@....okisemi.com>
To:	"'Lars-Peter Clausen'" <lars@...afoo.de>,
	"'Grant Likely'" <grant.likely@...retlab.ca>
Cc:	<linux-kernel@...r.kernel.org>, <toshiharu-linux@....okisemi.com>
Subject: RE: Question: GPIO driver how to get irq_base

Hi,

Modifying parameter of poll ( ) like below, poll ( ) becomes blocked correctly.
    pfd.events = POLLPRI | POLLERR
And I can confirm when GPIO driver detects edge changing,
the blocked poll  ( ) is released correctly. 

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

> -----Original Message-----
> From: linux-kernel-owner@...r.kernel.org 
> [mailto:linux-kernel-owner@...r.kernel.org] On Behalf Of 
> Tomoya MORINAGA
> Sent: Monday, May 16, 2011 7:39 PM
> To: 'Lars-Peter Clausen'; 'Grant Likely'
> Cc: linux-kernel@...r.kernel.org; toshiharu-linux@....okisemi.com
> Subject: RE: Question: GPIO driver how to get irq_base
> 
> Hi,
> 
> Pch_gpio driver can become detecting falling/rising edge.
> I attached the latest GPIO driver, usermode TP and the result.
> 
> However, "poll( )" of gpio_tp behavior is different than I 
> anticipated. 
> The "poll" is not blocked. (The returned value looks good)
> 
> My anticipated behavior is
>   Execute gpio_tp (blocked at poll( ))
>   (Detect edge)
>   Interrupt handler of pch_gpio is called
>   Blocked poll( ) becomes released.
> 
> Let me know your opinion.
> 
> With Best Regards,
> -----------------------------------------
> Tomoya MORINAGA
> OKI SEMICONDUCTOR CO., LTD.
> 

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