linux-kernel - Re: [PATCH v3 6/7] dt-bindings: add irq domain parent binding

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Message-ID: <20141009145718.GB18384@leverpostej>
Date:	Thu, 9 Oct 2014 15:57:18 +0100
From:	Mark Rutland <mark.rutland@....com>
To:	"Joe.C" <yingjoe.chen@...iatek.com>
Cc:	"arm@...nel.org" <arm@...nel.org>,
	Rob Herring <robh+dt@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jiang Liu <jiang.liu@...ux.intel.com>,
	Marc Zyngier <Marc.Zyngier@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"srv_heupstream@...iatek.com" <srv_heupstream@...iatek.com>,
	"yingjoe.chen@...il.com" <yingjoe.chen@...il.com>,
	"hc.yen@...iatek.com" <hc.yen@...iatek.com>,
	"eddie.huang@...iatek.com" <eddie.huang@...iatek.com>,
	"nathan.chung@...iatek.com" <nathan.chung@...iatek.com>,
	"yh.chen@...iatek.com" <yh.chen@...iatek.com>,
	Sascha Hauer <kernel@...gutronix.de>,
	Olof Johansson <olof@...om.net>, Arnd Bergmann <arnd@...db.de>,
	Pawel Moll <Pawel.Moll@....com>,
	Russell King <linux@....linux.org.uk>,
	Jason Cooper <jason@...edaemon.net>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Santosh Shilimkar <santosh.shilimkar@...com>,
	Matt Porter <mporter@...aro.org>,
	Marc Carino <marc.ceeeee@...il.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	Sricharan R <r.sricharan@...com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 6/7] dt-bindings: add irq domain parent binding

Hi,

On Thu, Oct 09, 2014 at 03:29:39PM +0100, Joe.C wrote:
> From: "Joe.C" <yingjoe.chen@...iatek.com>
> 
> Add "arm,irq-domain-hierarchy" optional property.
> 
> Signed-off-by: Joe.C <yingjoe.chen@...iatek.com>
> ---
>  Documentation/devicetree/bindings/arm/gic.txt | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/arm/gic.txt b/Documentation/devicetree/bindings/arm/gic.txt
> index c7d2fa1..f0bb759 100644
> --- a/Documentation/devicetree/bindings/arm/gic.txt
> +++ b/Documentation/devicetree/bindings/arm/gic.txt
> @@ -68,6 +68,8 @@ Example:
>  		      <0xfff10100 0x100>;
>  	};
>  
> +- arm,irq-domain-hierarchy : When this property exists, gic will be used as
> +  parent for hierarchy irq domain.

IRQ domains are a Linux internal detail, and their description doesn't
belong in the DT. So this property does not look like it should be
described in the DT.

I don't see a description of any relationship between devices here, so
it's not clear to me what this property is intended to imply.

Why do you think you need this?

Thanks,
Mark.
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