linux-kernel - Re: [PATCH v6 2/2] dt-bindings: spi: Document Renesas R-Car Gen3 RPC-IF controller bindings

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Date:   Fri, 18 Jan 2019 11:18:17 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:     Mason Yang <masonccyang@...c.com.tw>, broonie@...nel.org,
        marek.vasut@...il.com, linux-kernel@...r.kernel.org,
        linux-spi@...r.kernel.org, bbrezillon@...nel.org,
        linux-renesas-soc@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     juliensu@...c.com.tw, Simon Horman <horms@...ge.net.au>,
        zhengxunli@...c.com.tw
Subject: Re: [PATCH v6 2/2] dt-bindings: spi: Document Renesas R-Car Gen3
 RPC-IF controller bindings

Hello!

On 18.01.2019 8:54, Mason Yang wrote:

> Document the bindings used by the Renesas R-Car Gen3 RPC-IF controller.
> 
> Signed-off-by: Mason Yang <masonccyang@...c.com.tw>
> ---
>   .../devicetree/bindings/spi/spi-renesas-rpc.txt    | 37 ++++++++++++++++++++++
>   1 file changed, 37 insertions(+)
>   create mode 100644 Documentation/devicetree/bindings/spi/spi-renesas-rpc.txt
> 
> diff --git a/Documentation/devicetree/bindings/spi/spi-renesas-rpc.txt b/Documentation/devicetree/bindings/spi/spi-renesas-rpc.txt
> new file mode 100644
> index 0000000..9b5001e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/spi/spi-renesas-rpc.txt
> @@ -0,0 +1,37 @@
> +Renesas R-Car Gen3 RPC-IF controller Device Tree Bindings
> +----------------------------------------------------------
> +
> +Required properties:
> +- compatible: should be "renesas,rcar-gen3-rpc"
> +- #address-cells: should be 1
> +- #size-cells: should be 0
> +- reg: should contain three register areas:
> +	first for the base address of 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"
> +- clock-names: should contain "rpc"
> +- clocks: should contain 1 entries for the module's clock
> +
> +Example:
> +
> +	rpc: rpc@...00000 {
> +		compatible = "renesas,rcar-gen3-rpc";
> +		reg = <0 0xee200000 0 0x7fff>, <0 0x08000000 0 0x4000000>,

    s/0x7fff/0x8000/. -- that's size, not limit. But in reality, 0x200 would 
be enough.

> +		      <0 0xee208000 0 0x100>;
> +		reg-names = "regs", "dirmap", "<wbuf>;

    Why <>?

MBR, Sergei