netdev - Re: [PATCH/RFC v2 net-next 3/4] ravb: Document binding for r8a7795 SoC

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Message-ID: <20150911081443.GD2835@verge.net.au>
Date:	Fri, 11 Sep 2015 17:14:44 +0900
From:	Simon Horman <horms@...ge.net.au>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Linux-sh list <linux-sh@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Magnus Damm <magnus.damm@...il.com>,
	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	Kazuya Mizuguchi <kazuya.mizuguchi.ks@...esas.com>
Subject: Re: [PATCH/RFC v2 net-next 3/4] ravb: Document binding for r8a7795
 SoC

On Fri, Sep 11, 2015 at 09:12:17AM +0200, Geert Uytterhoeven wrote:
> Hi Simon,
> 
> On Fri, Sep 11, 2015 at 4:01 AM, Simon Horman
> <horms+renesas@...ge.net.au> wrote:
> > --- a/Documentation/devicetree/bindings/net/renesas,ravb.txt
> > +++ b/Documentation/devicetree/bindings/net/renesas,ravb.txt
> > @@ -6,8 +6,11 @@ interface contains.
> >  Required properties:
> >  - compatible: "renesas,etheravb-r8a7790" if the device is a part of R8A7790 SoC.
> >               "renesas,etheravb-r8a7794" if the device is a part of R8A7794 SoC.
> > +             "renesas,etheravb-r8a7795" if the device is a part of R8A7795 SoC.
> >  - reg: offset and length of (1) the register block and (2) the stream buffer.
> > -- interrupts: interrupt specifier for the sole interrupt.
> > +- interrupts: interrupt specifiers.
> > +             One for each entry in interrupt-names the R8A7795 SoC;
> 
> ... for the R8A7795 SoC
> 
> > +             One entry for a multiplexed interrupt otherwise.
> >  - phy-mode: see ethernet.txt file in the same directory.
> >  - phy-handle: see ethernet.txt file in the same directory.
> >  - #address-cells: number of address cells for the MDIO bus, must be equal to 1.
> > @@ -18,6 +21,9 @@ Required properties:
> >  Optional properties:
> >  - interrupt-parent: the phandle for the interrupt controller that services
> >                     interrupts for this device.
> > +- interrupt-names: One entry per interrupt named "ch%u".
> > +                  For the R8A7795 SoC this property is mandatory,
> > +                  and "ch0" through "ch24" are mandatory.
> 
> This suggests the single multiplexed interrupt on R-Car Gen2 can be called
> "ch0". Is that what you want? I know the driver doesn't care.

No, its not what I intended.

I think its reasonable to allow the multiplexed interrupt to be named,
but to what I wonder. The documentation seems to call the interrupt
"EthernetAVB", which isn't very exciting.
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