linux-kernel - Re: [PATCH v2 4/5] ARM: at91/dt: add AIC irq1 muxed peripheral id definitions

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Date:	Wed, 14 Jan 2015 14:40:42 +0100
From:	Nicolas Ferre <nicolas.ferre@...el.com>
To:	Boris Brezillon <boris.brezillon@...e-electrons.com>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, 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>, <devicetree@...r.kernel.org>
Subject: Re: [PATCH v2 4/5] ARM: at91/dt: add AIC irq1 muxed peripheral id
 definitions

Le 14/01/2015 14:34, Boris Brezillon a écrit :
> On Wed, 14 Jan 2015 14:21:47 +0100
> Nicolas Ferre <nicolas.ferre@...el.com> wrote:
> 
>> Le 13/01/2015 19:46, Boris Brezillon a écrit :
>>> These ids will be used to define irqs multiplexed on the first irq line.
>>>
>>> Signed-off-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
>>> ---
>>>  .../dt-bindings/interrupt-controller/atmel-aic.h   | 22 ++++++++++++++++++++++
>>>  1 file changed, 22 insertions(+)
>>>  create mode 100644 include/dt-bindings/interrupt-controller/atmel-aic.h
>>>
>>> diff --git a/include/dt-bindings/interrupt-controller/atmel-aic.h b/include/dt-bindings/interrupt-controller/atmel-aic.h
>>> new file mode 100644
>>> index 0000000..e14a94f
>>> --- /dev/null
>>> +++ b/include/dt-bindings/interrupt-controller/atmel-aic.h
>>> @@ -0,0 +1,22 @@
>>> +#ifndef _DT_BINDINGS_INTERRUPT_CONTROLLER_ARM_GIC_H
>>> +#define _DT_BINDINGS_INTERRUPT_CONTROLLER_ARM_GIC_H
>>
>> Nit.: why ARM_GIC?
> 
> Because I copied it from the arm-gic.h header and forgot to rename
> those macros :-).
> I'll fix that.
> 
>>
>>> +#include <dt-bindings/interrupt-controller/irq.h>
>>> +
>>> +#define AIC_IRQ1_PMC		0
>>> +#define AIC_IRQ1_ST		1
>>> +#define AIC_IRQ1_PIT		1
>>> +#define AIC_IRQ1_DBGU		2
>>> +#define AIC_IRQ1_RTC		3
>>> +#define AIC_IRQ1_RTT		4
>>> +#define AIC_IRQ1_WATCHDOG	5
>>> +#define AIC_IRQ1_MC		6
>>> +#define AIC_IRQ1_SDRAMC		6
>>> +#define AIC_IRQ1_DDRSDRC	6
>>> +#define AIC_IRQ1_RSTC		7
>>> +#define AIC_IRQ1_PMERRLOC	8
>>> +#define AIC_IRQ1_PMECC		9
> 
> Following up the discussion we had privately regarding these
> macros (whether we really need them or not), maybe adding a comment
> above the irqs property would be enough:
> 
> 	dumb_irq1_demux: dumb-irq-demux@1 {
> 		compatible = "irqchip-dumb-demux";
> 		interrupt-controller;
> 		#interrupt-cells = <1>;
> 		interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;
> 		/*
> 		 * Interrupt lines:
> 		 * 0: PMC
> 		 * 1: PIT
> 		 * 2: DBGU
> 		 * 3: RTT
> 		 * 4: WATCHDOG
> 		 * 5: RSTC
> 		 */
> 		irqs = <0x3f>;
> 	};

Well, I tend to prefer when no additional macros are defined in DT for
no real added value. So, this comment seems to be enough... I would vote
for this solution ;-)

Thanks, bye,
-- 
Nicolas Ferre
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