linux-kernel - Re: [PATCH v2 1/4] pinctrl: st: Add Interrupt support.

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Date:	Thu, 23 Jan 2014 08:22:53 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Srinivas KANDAGATLA <srinivas.kandagatla@...com>
Cc:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Rob Landley <rob@...dley.net>,
	Russell King <linux@....linux.org.uk>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 1/4] pinctrl: st: Add Interrupt support.

On Thu, Jan 16, 2014 at 4:36 PM,  <srinivas.kandagatla@...com> wrote:

> From: Srinivas Kandagatla <srinivas.kandagatla@...com>
>
> This patch add interrupt support to the pincontroller driver.
>
> ST Pincontroller GPIO bank can have one of the two possible types of
> interrupt-wirings.
>
> First type is via irqmux, single interrupt is used by multiple gpio
> banks. This reduces number of overall interrupts numbers required. All
> these banks belong to a single pincontroller.
>                   _________
>                  |         |----> [gpio-bank (n)    ]
>                  |         |----> [gpio-bank (n + 1)]
>         [irqN]-- | irq-mux |----> [gpio-bank (n + 2)]
>                  |         |----> [gpio-bank (...  )]
>                  |_________|----> [gpio-bank (n + 7)]
>
> Second type has a dedicated interrupt per gpio bank.
>
>         [irqN]----> [gpio-bank (n)]
>
> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...com>

I've applied this patch so that it won't just sit idle.
Besides you've done a real good job on it Srinivas.

It'll be for v3.15 though and I'm still waiting to see if
the device tree people say something about it.

Yours,
Linus Walleij
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