linux-kernel - RE: [PATCH 07/27] irqchip: Declare cortex-a7's irqchip to initialize gic from dt

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Date:	Thu, 10 Apr 2014 19:37:12 +0900
From:	Chanho Park <chanho61.park@...sung.com>
To:	'Marc Zyngier' <marc.zyngier@....com>,
	'Chanwoo Choi' <cw00.choi@...sung.com>
Cc:	mark.rutland@....com, linux-samsung-soc@...r.kernel.org,
	t.figa@...sung.com, hyunhee.kim@...sung.com,
	sw0312.kim@...sung.com, linux-kernel@...r.kernel.org,
	yj44.cho@...sung.com, inki.dae@...sung.com,
	kyungmin.park@...sung.com, kgene.kim@...sung.com,
	'Thomas Gleixner' <tglx@...utronix.de>,
	linux-arm-kernel@...ts.infradead.org
Subject: RE: [PATCH 07/27] irqchip: Declare cortex-a7's irqchip to initialize
 gic from dt

Hi,

> -----Original Message-----
> From: linux-arm-kernel [mailto:linux-arm-kernel-
> bounces@...ts.infradead.org] On Behalf Of Marc Zyngier
> Sent: Thursday, April 10, 2014 7:05 PM
> To: Chanwoo Choi
> Cc: mark.rutland@....com; linux-samsung-soc@...r.kernel.org;
> t.figa@...sung.com; hyunhee.kim@...sung.com; sw0312.kim@...sung.com;
> linux-kernel@...r.kernel.org; yj44.cho@...sung.com; inki.dae@...sung.com;
> kyungmin.park@...sung.com; kgene.kim@...sung.com; Thomas Gleixner;
> linux-arm-kernel@...ts.infradead.org
> Subject: Re: [PATCH 07/27] irqchip: Declare cortex-a7's irqchip to
> initialize gic from dt
> 
> On Thu, Apr 10 2014 at 10:28:24 am BST, Chanwoo Choi
> <cw00.choi@...sung.com> wrote:
> > This patch declare coretex-a7's irqchip to initialze gic from dt
> > with "arm,cortex-a7-gic" data.
> >
> > Cc: Thomas Gleixner <tglx@...utronix.de>
> > Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
> > Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>
> > ---
> >  drivers/irqchip/irq-gic.c | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
> > index 4300b66..8e906e4 100644
> > --- a/drivers/irqchip/irq-gic.c
> > +++ b/drivers/irqchip/irq-gic.c
> > @@ -1069,6 +1069,7 @@ gic_of_init(struct device_node *node, struct
> device_node *parent)
> >  }
> >  IRQCHIP_DECLARE(cortex_a15_gic, "arm,cortex-a15-gic", gic_of_init);
> >  IRQCHIP_DECLARE(cortex_a9_gic, "arm,cortex-a9-gic", gic_of_init);
> > +IRQCHIP_DECLARE(cortex_a7_gic, "arm,cortex-a7-gic", gic_of_init);
> >  IRQCHIP_DECLARE(msm_8660_qgic, "qcom,msm-8660-qgic", gic_of_init);
> >  IRQCHIP_DECLARE(msm_qgic2, "qcom,msm-qgic2", gic_of_init);
> 
> Frankly, this patch adds no value. Are we going to add
> "arm,cortex-a12-gic", "arm,cortex-a17-gic", "arm,cortex-a53-gic",
> "arm,cortex-a57-gic"? And that's just to mention the ARM Ltd cores...
> 
> Instead, how about defining a generic "arm,gic" property, and mandate
> that new DT files are using that? We can always use a more precise
> compatible for quirks.

I prefer it would be arm,gicv2 instead arm-gic.
In case of GICv3 of arm64, it can be arm,gicv3.

Best Regards,
Chanho Park

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