linux-kernel - Re: [PATCH] gpiolib: Add gpio_detect, gpio_debounce and gpio_alt

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Message-Id: <200906151504.51934.florian@openwrt.org>
Date:	Mon, 15 Jun 2009 15:04:50 +0200
From:	Florian Fainelli <florian@...nwrt.org>
To:	Ben Dooks <ben-linux@...ff.org>
Cc:	Alek Du <alek.du@...el.com>,
	Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] gpiolib: Add gpio_detect, gpio_debounce and gpio_alt_func features to GPIOLIB

Le Monday 15 June 2009 14:51:46 Ben Dooks, vous avez écrit :
> On Mon, Jun 15, 2009 at 05:15:02PM +0800, Alek Du wrote:
> > >From 7a76916ccea4a376a260ea67fbc79ac4d958757f Mon Sep 17 00:00:00 2001
> >
> > From: Alek Du <alek.du@...el.com>
> > Date: Fri, 8 May 2009 09:46:49 +0800
> > Subject: [PATCH] gpiolib: Add gpio_detect, gpio_debounce and
> > gpio_alt_func features to GPIOLIB
> >
> > Add some more functions to GPIOLIB, they are:
> > * gpio_detect is to set GPIO interrupt triggering method (edge, level,
> > high, low, etc.)

The name does not seem to reflect what it does, what about gpio_set_type or 
gpio_set_int_type for instance ?

>
> This is the wrong way of doing it, there is as a definit set_type
> method in the irq_chip structure which should be used to alter the
> way the IRQ is triggered.

I would expect your architecture IRQ handler to have a set_type callback for 
the GPIO lines capables of generating an interrupt. See how we have beeing 
doing it for rb532 for instance: 
http://www.linux-mips.org/git?p=linux-queue.git;a=blob;f=arch/mips/rb532/irq.c;h=f07882029a90d3d155c17b462812c2936229458c;hb=HEAD#l173
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