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

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Date:   Tue, 14 May 2019 18:00:13 +0800
From:   masonccyang@...c.com.tw
To:     "Sergei Shtylyov" <sergei.shtylyov@...entembedded.com>,
        "Geert Uytterhoeven" <geert@...ux-m68k.org>,
        "Lee Jones" <lee.jones@...aro.org>
Cc:     "Boris Brezillon" <bbrezillon@...nel.org>,
        "Mark Brown" <broonie@...nel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "Geert Uytterhoeven" <geert@...ux-m68k.org>,
        "Geert Uytterhoeven" <geert+renesas@...der.be>,
        "Simon Horman" <horms@...ge.net.au>, juliensu@...c.com.tw,
        "Lee Jones" <lee.jones@...aro.org>,
        "Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
        "Linux-Renesas" <linux-renesas-soc@...r.kernel.org>,
        "linux-spi" <linux-spi@...r.kernel.org>,
        "Marek Vasut" <marek.vasut@...il.com>,
        "Mark Rutland" <mark.rutland@....com>,
        "Rob Herring" <robh@...nel.org>,
        "Sergei Shtylyov" <sergei.shtylyov@...entembedded.com>,
        zhengxunli@...c.com.tw
Subject: Re: [PATCH v12 3/3] dt-bindings: mfd: Document Renesas R-Car Gen3 RPC-IF
 MFD bindings


Hi Sergei, 

> > 
> >    Could you please indent with 1 or 2 tabs where you used 8 or 16 
spaces?

Sorry, I just copy this new DTS from git to my Notes email system,
therefore, the "tabs space" is not alignment with original file.

> 
> Patch new DTS to
> ===============================================================> 
> 
> +Renesas R-Car Gen3 RPC-IF controller Device Tree Bindings
> +---------------------------------------------------------
> +
> +RPC-IF supports both SPI NOR and HyperFlash (CFI-compliant flash)
> +
> +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 three register areas:
> +   first for RPC-IF registers,
> +   second for the direct mapping read mode and
> +   third for the write buffer area.
> +- reg-names: should contain "regs", "dirmap" and "wbuf"
> +- clocks: should contain 1 entries for the module's clock
> +- clock-names: should contain "rpc"
> +- #address-cells: should be 1
> +- #size-cells: should be 0
> +
> +Example:
> +- SPI mode:
> +
> +   rpc_if: spi@...00000 {
> +      compatible = "renesas,r8a77995-rpc", "renesas,rcar-gen3-rpc";
> +      reg = <0 0xee200000 0 0x200>, <0 0x08000000 0 0x4000000>,
> +            <0 0xee208000 0 0x100>;
> +      reg-names = "regs", "dirmap", "wbuf";
> +      clocks = <&cpg CPG_MOD 917>;
> +      clock-names = "rpc";
> +      power-domains = <&sysc R8A77995_PD_ALWAYS_ON>;
> +      resets = <&cpg 917>;
> +      #address-cells = <1>;
> +      #size-cells = <0>;
> +
> +      flash@0 {
> +         compatible = "jedec,spi-nor";
> +         reg = <0>;
> +         spi-max-frequency = <40000000>;
> +         spi-tx-bus-width = <1>;
> +         spi-rx-bus-width = <1>;
> +      };
> +   };
> +
> +- HF mode:
> +   rpc_if: hf@...00000 {
> +      compatible = "renesas,r8a77995-rpc", "renesas,rcar-gen3-rpc";
> +      reg = <0 0xee200000 0 0x200>, <0 0x08000000 0 0x4000000>,
> +            <0 0xee208000 0 0x100>;
> +      reg-names = "regs", "dirmap", "wbuf";
> +      clocks = <&cpg CPG_MOD 917>;
> +      clock-names = "rpc";
> +      power-domains = <&sysc R8A77995_PD_ALWAYS_ON>;
> +      resets = <&cpg 917>;
> +      #address-cells = <1>;
> +      #size-cells = <0>;
> +
> +      flash@0 {
> +         compatible = "cypress,hyperflash", "cfi-flash";
> +         reg = <0>;
> +      };
> +   };
> 
> =======================================================================<

thanks for your review.

best regards,
Mason 



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