linux-kernel - Re: [PATCH 3/9] irq: convert generic-chip to use irq

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Message-ID: <20111215055501.GC21815@S2101-09.ap.freescale.net>
Date:	Thu, 15 Dec 2011 13:55:04 +0800
From:	Shawn Guo <shawn.guo@...escale.com>
To:	Rob Herring <robherring2@...il.com>
CC:	Kevin Hilman <khilman@...com>, Kukjin Kim <kgene.kim@...sung.com>,
	Tony Lindgren <tony@...mide.com>,
	Linus Walleij <linus.ml.walleij@...il.com>,
	<devicetree-discuss@...ts.ozlabs.org>,
	<linux-kernel@...r.kernel.org>,
	Rob Herring <rob.herring@...xeda.com>,
	Barry Song <baohua.song@....com>,
	Thomas Gleixner <tglx@...utronix.de>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 3/9] irq: convert generic-chip to use irq_domain

On Thu, Dec 15, 2011 at 01:25:20PM +0800, Shawn Guo wrote:
> On Wed, Dec 14, 2011 at 09:28:52AM -0600, Rob Herring wrote:
> > From: Rob Herring <rob.herring@...xeda.com>
> > 
> > Add irq domain support to irq generic-chip. This enables users of
> > generic-chip to support dynamic irq assignment needed for DT interrupt
> > binding. Users must be converted to use irq_data.hwirq for determining
> > local interrupt numbers rather than using the Linux irq number.
> > 
> > irq_base is kept for now as there are a few users of it. Once they
> > are converted to use the irq domain, it can be removed.
> > 
> > Signed-off-by: Rob Herring <rob.herring@...xeda.com>
> > Cc: Thomas Gleixner <tglx@...utronix.de>
> > ---
> 
> Tested-by: Shawn Guo <shawn.guo@...aro.org>
> 
Sorry, I have to take that tag back after I correct my test setup.
It does not work for imx5 TZIC case, because the following change
I suggested before is missed.

diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index eb763f7..2a2aac1 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -39,7 +39,7 @@ void irq_domain_add(struct irq_domain *domain)
                        return;
                }
                d->domain = domain;
-               d->hwirq = hwirq;
+               d->hwirq = hwirq - domain->hwirq_base;
        }

        mutex_lock(&irq_domain_mutex);

-- 
Regards,
Shawn

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