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From:   Arnd Bergmann <arnd@arndb.de>
Date:   Thu, 18 Jan 2018 12:02:18 +0100
Message-ID: <CAK8P3a0HGhx3WpF-AwC+7m8+FoaiQBTYoCLqhECrATBRLX7x5g@mail.gmail.com>
Subject: Re: [PATCH v6 31/36] dt-bindings: nds32 CPU Bindings
To:     Greentime Hu <green.hu@gmail.com>
Cc:     Greentime <greentime@andestech.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        linux-arch <linux-arch@vger.kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Jason Cooper <jason@lakedaemon.net>,
        Marc Zyngier <marc.zyngier@arm.com>,
        Rob Herring <robh+dt@kernel.org>,
        Networking <netdev@vger.kernel.org>,
        Vincent Chen <deanbo422@gmail.com>,
        DTML <devicetree@vger.kernel.org>,
        Al Viro <viro@zeniv.linux.org.uk>,
        David Howells <dhowells@redhat.com>,
        Will Deacon <will.deacon@arm.com>,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
        linux-serial@vger.kernel.org,
        Geert Uytterhoeven <geert.uytterhoeven@gmail.com>,
        Linus Walleij <linus.walleij@linaro.org>,
        Mark Rutland <mark.rutland@arm.com>, Greg KH <greg@kroah.com>,
        Guo Ren <ren_guo@c-sky.com>,
        Randy Dunlap <rdunlap@infradead.org>,
        David Miller <davem@davemloft.net>,
        Jonas Bonn <jonas@southpole.se>,
        Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>,
        Stafford Horne <shorne@gmail.com>,
        Vincent Chen <vincentc@andestech.com>,
        Rick Chen <rick@andestech.com>, Zong Li <zong@andestech.com>
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On Mon, Jan 15, 2018 at 6:53 AM, Greentime Hu <green.hu@gmail.com> wrote:
> From: Greentime Hu <greentime@andestech.com>
>
> This patch adds nds32 CPU binding documents.
>
> Signed-off-by: Vincent Chen <vincentc@andestech.com>
> Signed-off-by: Rick Chen <rick@andestech.com>
> Signed-off-by: Zong Li <zong@andestech.com>
> Signed-off-by: Greentime Hu <greentime@andestech.com>
> Reviewed-by: Rob Herring <robh@kernel.org>
> ---
>  Documentation/devicetree/bindings/nds32/cpus.txt |   37 ++++++++++++++++++++++
>  1 file changed, 37 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/nds32/cpus.txt
>
> diff --git a/Documentation/devicetree/bindings/nds32/cpus.txt b/Documentation/devicetree/bindings/nds32/cpus.txt
> new file mode 100644
> index 0000000..9a52937
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/nds32/cpus.txt
> @@ -0,0 +1,37 @@
> +* Andestech Processor Binding
> +
> +This binding specifies what properties must be available in the device tree
> +representation of a Andestech Processor Core, which is the root node in the
> +tree.
> +
> +Required properties:
> +
> +       - compatible:
> +               Usage: required
> +               Value type: <string>
> +               Definition: should be one of:
> +                       "andestech,n13"
> +                       "andestech,n15"
> +                       "andestech,d15"
> +                       "andestech,n10"
> +                       "andestech,d10"
> +                       "andestech,nds32v3"

Based on https://lkml.org/lkml/2017/11/27/1290, this should say that
the device tree should always list 'andestech,nds32v3' as the most
generic 'compatible' value and list exactly one of the others in
addition.

       Arnd