linux-kernel - Re: [PATCH v2 1/2] doc: bindings: Add bindings documentation for mtd nvmem

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Date:   Wed, 15 Mar 2017 12:24:01 -0500
From:   Rob Herring <robh@...nel.org>
To:     Alban <albeu@...e.fr>
Cc:     linux-kernel@...r.kernel.org,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Mark Rutland <mark.rutland@....com>,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Richard Weinberger <richard@....at>,
        Cyrille Pitchen <cyrille.pitchen@...el.com>,
        devicetree@...r.kernel.org, linux-mtd@...ts.infradead.org,
        Moritz Fischer <moritz.fischer@...us.com>
Subject: Re: [PATCH v2 1/2] doc: bindings: Add bindings documentation for mtd
 nvmem

On Tue, Mar 07, 2017 at 09:26:03AM +0100, Alban wrote:
> Config data for drivers, like MAC addresses, is often stored in MTD.
> Add a binding that define how such data storage can be represented in
> device tree.
> 
> Signed-off-by: Alban <albeu@...e.fr>
> ---
> Changelog:
> v2: * Added a "Required properties" section with the nvmem-provider
>       property
> ---
>  .../devicetree/bindings/nvmem/mtd-nvmem.txt        | 33 ++++++++++++++++++++++
>  1 file changed, 33 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/nvmem/mtd-nvmem.txt
> 
> diff --git a/Documentation/devicetree/bindings/nvmem/mtd-nvmem.txt b/Documentation/devicetree/bindings/nvmem/mtd-nvmem.txt
> new file mode 100644
> index 0000000..8ed25e6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/nvmem/mtd-nvmem.txt
> @@ -0,0 +1,33 @@
> += NVMEM in MTD =
> +
> +Config data for drivers, like MAC addresses, is often stored in MTD.
> +This binding define how such data storage can be represented in device tree.
> +
> +An MTD can be defined as an NVMEM provider by adding the `nvmem-provider`
> +property to their node. Data cells can then be defined as child nodes
> +of the partition as defined in nvmem.txt.
> +
> +Required properties:
> +nvmem-provider:	Indicate that the device should be registered as
> +		NVMEM provider

I think we should use a compatible string here (perhaps with a 
generic fallback), and that can imply it is an nvmem provider. The 
reason is then the compatible can also imply other information that 
isn't defined in DT.

Rob