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Message-ID: <8720224d-76f4-c620-9e3f-91605d6fa1e3@cogentembedded.com>
Date:   Tue, 16 Apr 2019 11:02:10 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:     masonccyang@...c.com.tw
Cc:     bbrezillon@...nel.org, broonie@...nel.org,
        devicetree@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Simon Horman <horms@...ge.net.au>, juliensu@...c.com.tw,
        lee.jones@...aro.org, linux-kernel@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org, linux-spi@...r.kernel.org,
        marek.vasut@...il.com, mark.rutland@....com, robh+dt@...nel.org
Subject: Re: [PATCH v10 3/3] dt-bindings: mfd: Document Renesas R-Car Gen3
 RPC-IF controller bindings

On 16.04.2019 4:06, masonccyang@...c.com.tw wrote:

>  > > Document the bindings used by the Renesas R-Car Gen3 RPC-IF MFD controller.
>  > >
>  > > Signed-off-by: Mason Yang <masonccyang@...c.com.tw>
>  > > ---
>  > >  .../devicetree/bindings/mfd/mfd-renesas-rpc.txt  | 37 +++++++++
>  > +++++++++++++
>  > >  1 file changed, 37 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..bfb3d29
>  > > --- /dev/null
>  > > +++ b/Documentation/devicetree/bindings/mfd/mfd-renesas-rpc.txt
>  > > @@ -0,0 +1,37 @@
>  > > +Renesas R-Car Gen3 RPC-IF MFD controller Device Tree Bindings
>  > > +-------------------------------------------------------------
>  > > +
>  > > +Required properties:
>  > > +- compatible: should be an SoC-specific compatible value, followed by
>  > > +      "renesas,rcar-gen3-rpc" as a fallback.
>  > > +      supported SoC-specific values are:
>  > > +      "renesas,r8a77995-rpc" (R-Car D3)
>  > > +- reg: should contain 2 entries, one for the base address of rpc-
>  > if registers,
>  > > +   and one for the direct mapping area
>  > > +- reg-names: should contain "regs", and "dirmap"
>  >
>  >    The device tree describes the hardware, not the driver. Why did you remove
>  > the "wbuf" area?
> 
> I don't think we should describe the hardware that driver did not implement it
> because there are still many RPC registers we don't use them.

    I have to repeat: we describe the hardware, not the driver capabilities.

> best regards,
> Mason

MBR, Sergei

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