linux-kernel - Re: [PATCH 09/14] pinctrl/abx500: use direct IRQ defines

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Date:	Fri, 8 Feb 2013 08:25:36 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	Stephen Warren <swarren@...dotorg.org>
Cc:	Anmar Oueja <anmar.oueja@...aro.org>,
	linux-arm-kernel@...ts.infradead.org,
	Linus Walleij <linus.walleij@...aro.org>,
	Stephen Warren <swarren@...dia.com>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 09/14] pinctrl/abx500: use direct IRQ defines

On Thu, 07 Feb 2013, Stephen Warren wrote:

> On 02/07/2013 02:01 AM, Lee Jones wrote:
> > I don't see myself on cc. Was that intentional?
> 
> The original patch was that way; I assume git send-email only CC'd you
> on patches written by you.

No, I didn't send this patch at all.

I was asking Linus if he ment to CC me, as I thought I should have been.

> > I quite like the idea of this.
> > 
> > Stephen,
> > 
> > It doesn't mean the other patch was wrong, it just transfers the math.
> 
> Ah, I see. The issue is that the code below clearly calculates the hwirq
> differently, and it wasn't immediately obvious that this part of the
> patch for example:
> 
> >  struct abx500_gpio_irq_cluster ab8500_gpio_irq_cluster[] = {
> > -	GPIO_IRQ_CLUSTER(6,  13, 34),
> > -	GPIO_IRQ_CLUSTER(24, 25, 24),
> > -	GPIO_IRQ_CLUSTER(36, 41, 14),
> > +	GPIO_IRQ_CLUSTER(6,  13, AB8500_INT_GPIO6R),
> > +	GPIO_IRQ_CLUSTER(24, 25, AB8500_INT_GPIO24R),
> > +	GPIO_IRQ_CLUSTER(36, 41, AB8500_INT_GPIO36R),
> >  };
> 
> ... actually changes the values in the table (AB8500_INT_GPIO6R is 40,
> so when using that value, you need to subtract of the value 6 for the
> base to get the original 34).

Yes, I see how that may of looked if you didn't see the other change.

So you're happy?

> > I wouldn't squash it into mine. I like the transition and the
> > possibility to revert it if there's been some mistake.
> > 
> > (not to say there is one, but just in case.)
> > 
> > Sent from my mobile Linux device.
> > 
> > On Feb 7, 2013 12:14 AM, "Stephen Warren" <swarren@...dotorg.org
> > <mailto:swarren@...dotorg.org>> wrote:
> > 
> >     On 02/05/2013 12:48 PM, Linus Walleij wrote:
> >     > From: Linus Walleij <linus.walleij@...aro.org
> >     <mailto:linus.walleij@...aro.org>>
> >     >
> >     > Make it harder to do mistakes by introducing the actual
> >     > defined ABx500 IRQ number into the IRQ cluster definitions.
> >     > Deduct cluster offset from the GPIO offset to make each
> >     > cluster coherent.
> > 
> >     Shouldn't this patch be squashed into the previous patch to avoid churn?
> > 
> >     >  static struct abx500_pinctrl_soc_data ab9540_soc = {
> > 
> >     > @@ -273,8 +273,7 @@ static int abx500_gpio_to_irq(struct gpio_chip
> >     *chip, unsigned offset)
> > 
> >     > -                     hwirq = gpio + cluster->to_irq;
> >     > -
> >     > +                     hwirq = gpio - cluster->start + cluster->to_irq;
> >     >                       return
> >     irq_create_mapping(pct->parent->domain, hwirq);
> > 
> >     In particular, this change implies that the previous patch was simply
> >     incorrect, although I haven't really thought about it in detail.
> > 
> 

-- 
Lee Jones
Linaro ST-Ericsson Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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