linux-kernel - Re: [PATCH] RFC: interrupt consistency check for OF GPIO IRQs

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Date:	Sat, 03 Aug 2013 09:23:39 +0200
From:	Alexander Holler <holler@...oftware.de>
To:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
CC:	Linus Walleij <linus.walleij@...aro.org>,
	Grant Likely <grant.likely@...aro.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Linux-OMAP <linux-omap@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Enric Balletbo i Serra <eballetbo@...il.com>,
	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>,
	Santosh Shilimkar <santosh.shilimkar@...com>,
	Kevin Hilman <khilman@...aro.org>,
	Balaji T K <balajitk@...com>,
	Tony Lindgren <tony@...mide.com>,
	Jon Hunter <jgchunter@...il.com>
Subject: Re: [PATCH] RFC: interrupt consistency check for OF GPIO IRQs

Am 02.08.2013 17:35, schrieb Alexander Holler:
> Am 02.08.2013 11:57, schrieb Alexander Holler:
> 
>> There must have been a bug in the patch too. I've also added that
>> iinterrupt-parent stuff (with the same flags as used by the driver) and
>> just have let the driver call
>>
>> request_threaded_irq(gpio_to_irq(gpio), flags);
>>
>> without the gpio_request()/input() before. And request_threaded_irq()

Thinking again about what I've tried, I might have make the failure to
add the interrupt-parent line to the mmc-section (where the gpio was
specified) and not to the gpio(-controller) section where it might have
belong too (again, there was no example and no documentation).

But why I again bother you all with another mail, is that I don't like
the fact that the irq-flags might have to be specified in the DT and the
source (and they have to match).

A solution might be to use the flags specified in the DT for the
particular irq and ignore the flags specified as parameter to
request_irq(). At least as long as DT isn't mandatory. And in the
future, the flags could just be removed from the call to request_irq()
depending (then visible too) only on the flags as specified in the DT.

Regards,

Alexander Holler

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