linux-kernel - Re: [PATCH v4 1/9] dt-bindings: mtd: ingenic: Add compatible strings for JZ4740 and JZ4725B

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Date:   Wed, 13 Mar 2019 14:09:43 +0100
From:   Boris Brezillon <boris.brezillon@...labora.com>
To:     Paul Cercueil <paul@...pouillou.net>
Cc:     Miquel Raynal <miquel.raynal@...tlin.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Boris Brezillon <bbrezillon@...nel.org>,
        Marek Vasut <marek.vasut@...il.com>,
        Richard Weinberger <richard@....at>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Harvey Hunt <harveyhuntnexus@...il.com>,
        linux-mtd@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 1/9] dt-bindings: mtd: ingenic: Add compatible
 strings for JZ4740 and JZ4725B

On Wed, 13 Mar 2019 09:55:34 -0300
Paul Cercueil <paul@...pouillou.net> wrote:

> Hi,
> 
> Le lun. 4 mars 2019 à 15:51, Miquel Raynal <miquel.raynal@...tlin.com> 
> a écrit :
> > Hi Paul,
> >   
> >>  >>  ---   
> >> a/Documentation/devicetree/bindings/mtd/ingenic,jz4780-nand.txt  
> >>  >>  +++   
> >> b/Documentation/devicetree/bindings/mtd/ingenic,jz4780-nand.txt  
> >>  >>  @@ -6,7 +6,10 @@ memory-controllers/ingenic,jz4780-nemc.txt),   
> >> and >> thus NAND device nodes must  
> >>  >>   be children of the NEMC node.  
> >>  >> >>   Required NAND controller device properties:  
> >>  >>  -- compatible: Should be set to "ingenic,jz4780-nand".
> >>  >>  +- compatible: Should be one of:
> >>  >>  +  * ingenic,jz4740-nand
> >>  >>  +  * ingenic,jz4725b-nand
> >>  >>  +  * ingenic,jz4780-nand  
> >>  >
> >>  > Wouldn't "-nand-controller" suffix be better? Of course in the   
> >> driver  
> >>  > you should still check for jz4780-nand.  
> >> 
> >>  So I would be compatible with:
> >>  * ingenic,jz4740-nand-controller
> >>  * ingenic,jz4725b-nand-controller
> >>  * ingenic,jz4780-nand
> >>  ?  
> > 
> > From a driver POV I would even prefer ingenic,jz4780-nand-controller. 
> > I
> > don't know what's best here. Maybe Boris or Rob can help?

Let's keep it consistent and have all compatibles follow the old
naming scheme (ingenic,<soc>-nand). But yes, for new drivers, I agree
that -nand-controller is better than just -nand.