linux-kernel - Re: [PATCH v2 2/4] pinctrl: st: Add software edge trigger interrupt support.

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Message-ID: <CACRpkdb9cM_dh7UNpErv+gKrvMW0HbE7NcZq22AiZfEjrqS1qA@mail.gmail.com>
Date:	Mon, 27 Jan 2014 10:43:37 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	Srinivas KANDAGATLA <srinivas.kandagatla@...com>,
	Mark Rutland <mark.rutland@....com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Russell King <linux@....linux.org.uk>,
	Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Rob Herring <robh+dt@...nel.org>,
	Rob Landley <rob@...dley.net>,
	Kumar Gala <galak@...eaurora.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 2/4] pinctrl: st: Add software edge trigger interrupt support.

On Fri, Jan 24, 2014 at 9:28 AM, Lee Jones <lee.jones@...aro.org> wrote:
>> > +/*
>> > + * As edge triggers are not supported at hardware level, it is supported by
>> > + * software by exploiting the level trigger support in hardware.
>>
>> (...)
>>
>> All this is quite hard to understand. Maybe it's just because
>> it's hard overall. Edge triggers are not supported by hardware
>> so we use the hardware edge trigger support?
>>
>> That is a bit oxymoronic...
>
> That's not what is says. Read it again. :)

Argh yeah I was wrong ... it's perfectly consistent with the
implementation. Sorry for being such a slow brain this last
friday.

Yours,
Linus Walleij
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