linux-kernel - Re: [PATCH v2 1/3] dt-bindings: nvmem: add description for UniPhier eFuse

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Message-ID: <CAK7LNASpHvnicebVLbOgTDCmPp7UDVkf4FYWGsjAiB8ENo_2iw@mail.gmail.com>
Date:   Sun, 15 Oct 2017 17:04:54 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Rob Herring <robh@...nel.org>
Cc:     Keiji Hayashibara <hayashibara.keiji@...ionext.com>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Masami Hiramatsu <masami.hiramatsu@...aro.org>,
        Jassi Brar <jaswinder.singh@...aro.org>,
        Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>,
        Kiyoshi Owada <owada.kiyoshi@...ionext.com>
Subject: Re: [PATCH v2 1/3] dt-bindings: nvmem: add description for UniPhier eFuse

2017-10-14 3:42 GMT+09:00 Rob Herring <robh@...nel.org>:
> On Fri, Oct 13, 2017 at 11:04 AM, Masahiro Yamada
> <yamada.masahiro@...ionext.com> wrote:
>> Hi Rob,
>>
>>
>> 2017-10-13 22:49 GMT+09:00 Rob Herring <robh@...nel.org>:
>>> On Fri, Oct 06, 2017 at 02:02:58PM +0900, Keiji Hayashibara wrote:
>>>> Add uniphier-efuse dt-bindings documentation.
>>>>
>>>> Signed-off-by: Keiji Hayashibara <hayashibara.keiji@...ionext.com>
>>>> ---
>>>>  .../devicetree/bindings/nvmem/uniphier-efuse.txt   | 49 ++++++++++++++++++++++
>>>>  1 file changed, 49 insertions(+)
>>>>  create mode 100644 Documentation/devicetree/bindings/nvmem/uniphier-efuse.txt
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/nvmem/uniphier-efuse.txt b/Documentation/devicetree/bindings/nvmem/uniphier-efuse.txt
>>>> new file mode 100644
>>>> index 0000000..1a394e5
>>>> --- /dev/null
>>>> +++ b/Documentation/devicetree/bindings/nvmem/uniphier-efuse.txt
>>>> @@ -0,0 +1,49 @@
>>>> += UniPhier eFuse device tree bindings =
>>>> +
>>>> +This UniPhier eFuse must be under soc-glue.
>>>> +
>>>> +Required properties:
>>>> +- compatible: should be "socionext,uniphier-efuse"
>>>> +- reg: should contain the register location and length
>>>> +
>>>> += Data cells =
>>>> +Are child nodes of efuse, bindings of which as described in
>>>> +bindings/nvmem/nvmem.txt
>>>> +
>>>> +Example:
>>>> +
>>>> +     soc-glue@...00000 {
>>>> +             compatible = "socionext,uniphier-ld20-soc-glue-debug",
>>>> +                          "simple-mfd";
>>>> +             #address-cells = <1>;
>>>> +             #size-cells = <1>;
>>>> +             ranges = <0x0 0x5f900000 0x2000>;
>>>> +
>>>> +             efuse@100 {
>>>> +                     compatible = "socionext,uniphier-efuse";
>>>> +                     reg = <0x100 0x28>;
>>>> +             };
>>>> +
>>>> +             efuse@200 {
>>>> +                     compatible = "socionext,uniphier-efuse";
>>>> +                     reg = <0x200 0x68>;
>>>> +                     #address-cells = <1>;
>>>> +                     #size-cells = <1>;
>>>> +
>>>> +                     /* Data cells */
>>>> +                     usb_mon: usb_mon {
>>>
>>> Don't use '_' and needs a unit-address. Build your dtb with W=2 option
>>> and you'll get these warnings.
>>
>>
>> Do you mean "usb_mon: usb-mon@54" ?
>
> Yes.
>
>> DT files in kernel sprinkle tons of warnings even with W=1.
>>
>> I always eliminate W=1, so I agree with "@54".
>>
>> I do not care W=2 much.
>> If you see arch/arm64/boot/dts/socionext/uniphier-ld20.dtsi,
>> yeah, I generally use '-' for node names, but I see some exceptions.
>>
>> You admitted -Wnode_name_chars_strict is "subjective"
>> in commit 8654cb8d0371.
>
> Yes, meaning fixing existing cases is questionable and I'd put doing
> so at a lower priority. I didn't mean it is up to each person to
> decide whether they like to use '_' or not.
>
>> If you are unhappy about it, we can fix,
>> but I am not sure how picky we should be.
>
> Let me put it clearly: Don't add new warnings with W=2.


OK.

usb_mon: usb_mon {

should be fixed.

Srinivas forwarded this to Greg,
but I guess Greg has not applied this yet.

The author can do re-spin,
or a follow-up patch will do if it is too late.



-- 
Best Regards
Masahiro Yamada