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

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Date:   Mon, 04 Mar 2019 19:22:22 +0100
From:   Paul Cercueil <paul@...pouillou.net>
To:     Miquel Raynal <miquel.raynal@...tlin.com>
Cc:     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

Hi Miquel,

On Mon, Mar 4, 2019 at 10:45 AM, Miquel Raynal 
<miquel.raynal@...tlin.com> wrote:
> Hi Paul,
> 
> Paul Cercueil <paul@...pouillou.net <mailto:paul@...pouillou.net>> 
> wrote on Sat,  9 Feb 2019 16:22:57
> -0300:
> 
>>  Add compatible strings to probe the jz4780-nand and jz4780-bch 
>> drivers
>>  from devicetree on the JZ4725B and JZ4740 SoCs from Ingenic.
>> 
>>  Signed-off-by: Paul Cercueil <paul@...pouillou.net 
>> <mailto:paul@...pouillou.net>>
>>  ---
>> 
>>  Changes:
>> 
>>  v2: - Change 'ingenic,jz4725b-nand' compatible string to
>>        'ingenic,jz4740-nand' to reflect driver change
>>      - Add 'ingenic,jz4740-bch' compatible string
>>      - Document 'ingenic,oob-layout' property
>> 
>>  v3: - Removed 'ingenic,oob-layout' property
>>      - Update compatible strings to what the driver supports
>> 
>>  v4: No change
>> 
>>   Documentation/devicetree/bindings/mtd/ingenic,jz4780-nand.txt | 10 
>> ++++++++--
>>   1 file changed, 8 insertions(+), 2 deletions(-)
>> 
>>  diff --git 
>> a/Documentation/devicetree/bindings/mtd/ingenic,jz4780-nand.txt 
>> b/Documentation/devicetree/bindings/mtd/ingenic,jz4780-nand.txt
>>  index 29ea5853ca91..a5b940f18bf6 100644
>>  --- 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
?

>>   - reg: For each bank with a NAND chip attached, should specify a 
>> bank number,
>>     an offset of 0 and a size of 0x1000000 (i.e. the whole NEMC 
>> bank).
>> 
>>  @@ -72,7 +75,10 @@ NAND devices. The following is a description of 
>> the device properties for a
>>   BCH controller.
>> 
>>   Required BCH properties:
>>  -- compatible: Should be set to "ingenic,jz4780-bch".
>>  +- compatible: Should be one of:
>>  +  * ingenic,jz4740-ecc
>>  +  * ingenic,jz4725b-bch
>>  +  * ingenic,jz4780-bch
>>   - reg: Should specify the BCH controller registers location and 
>> length.
>>   - clocks: Clock for the BCH controller.
>> 
> 
> Thanks,
> Miquèl