linux-kernel - Re: [PATCH v12 3/3] dt-bindings: mfd: Document Renesas R-Car Gen3 RPC-IF MFD bindings

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Date:   Fri, 26 Apr 2019 03:44:53 +0200
From:   Marek Vasut <marek.vasut@...il.com>
To:     Rob Herring <robh@...nel.org>
Cc:     Mason Yang <masonccyang@...c.com.tw>,
        Mark Brown <broonie@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-spi <linux-spi@...r.kernel.org>,
        Boris Brezillon <bbrezillon@...nel.org>,
        "open list:MEDIA DRIVERS FOR RENESAS - FCP" 
        <linux-renesas-soc@...r.kernel.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Lee Jones <lee.jones@...aro.org>,
        Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org, Julien Su <juliensu@...c.com.tw>,
        Simon Horman <horms@...ge.net.au>, zhengxunli@...c.com.tw
Subject: Re: [PATCH v12 3/3] dt-bindings: mfd: Document Renesas R-Car Gen3
 RPC-IF MFD bindings

On 4/26/19 1:07 AM, Rob Herring wrote:
> On Wed, Apr 24, 2019 at 4:54 PM Marek Vasut <marek.vasut@...il.com> wrote:
>>
>> On 4/24/19 11:23 PM, Rob Herring wrote:
>>> On Wed, Apr 24, 2019 at 03:55:36PM +0800, Mason Yang wrote:
>>>> Document the bindings used by the Renesas R-Car Gen3 RPC-IF MFD.
>>>>
>>>> Signed-off-by: Mason Yang <masonccyang@...c.com.tw>
>>>> ---
>>>>  .../devicetree/bindings/mfd/mfd-renesas-rpc.txt    | 40 ++++++++++++++++++++++
>>>>  1 file changed, 40 insertions(+)
>>>>  create mode 100644 Documentation/devicetree/bindings/mfd/mfd-renesas-rpc.txt
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/mfd/mfd-renesas-rpc.txt b/Documentation/devicetree/bindings/mfd/mfd-renesas-rpc.txt
>>>> new file mode 100644
>>>> index 0000000..668b822
>>>> --- /dev/null
>>>> +++ b/Documentation/devicetree/bindings/mfd/mfd-renesas-rpc.txt
>>>> @@ -0,0 +1,40 @@
>>>> +Renesas R-Car Gen3 RPC-IF MFD Device Tree Bindings
>>>> +--------------------------------------------------
>>>
>>> Looks like a SPI flash controller from the example. What makes it an
>>> MFD?
>>
>> It supports both SPI NOR and HyperFlash (CFI-compliant flash with
>> different bus interface).
> 
> Not sure that really makes it an MFD. Lee probably has an opinion.
> 
> In any case, can we get a complete binding that shows both.

Presumably that would only mean the flash compatible is some "cfi,nor"
or somesuch. But I agree, would be nice to have both in the example.

-- 
Best regards,
Marek Vasut