linux-kernel - Re: [RFC][PATCH] Add interrupt handling capability to pca953x

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Date:	Mon, 16 Nov 2009 21:33:27 +0800
From:	Eric Miao <eric.y.miao@...il.com>
To:	Marc Zyngier <maz@...terjones.org>,
	David Brownell <david-b@...bell.net>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	Linux Arm Kernel <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [RFC][PATCH] Add interrupt handling capability to pca953x

On Mon, Nov 16, 2009 at 12:55 AM, Marc Zyngier <maz@...terjones.org> wrote:
> Most of the GPIO expanders controlled by the pca953x driver are
> able to report changes on the input pins through an *INT pin.
>
> This patch implements a very basic way for the platform code to
> be alerted when some input changes (both edge detection).
> It can be seen as a poor man irq_chip.
>
> Alternatively, this could be turned into a full-fledged irq_chip,
> though I'm not sure it is worth the complexity.
>

This actually has been submitted to the ML half a years ago along with
the first pca953x patch. I believe David Brownell has comments on
this, though :-)
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