linux-kernel - Re: [PATCH 17/17] ARM: dts: r8a7742: Add RWDT node

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Message-ID: <9ab946d2-1076-ed92-0a48-9a95d798d291@cogentembedded.com>
Date:   Mon, 18 May 2020 16:17:46 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:     "Lad, Prabhakar" <prabhakar.csengg@...il.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Jens Axboe <axboe@...nel.dk>, Rob Herring <robh+dt@...nel.org>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        "David S. Miller" <davem@...emloft.net>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>, linux-ide@...r.kernel.org,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux I2C <linux-i2c@...r.kernel.org>,
        Linux MMC List <linux-mmc@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Linux Watchdog Mailing List <linux-watchdog@...r.kernel.org>
Subject: Re: [PATCH 17/17] ARM: dts: r8a7742: Add RWDT node

Hello!

On 18.05.2020 15:27, Lad, Prabhakar wrote:

>>> Add a device node for the Watchdog Timer (RWDT) controller on the Renesas
>>> RZ/G1H (r8a7742) SoC.
>>>
>>> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
>>> Reviewed-by: Marian-Cristian Rotariu <marian-cristian.rotariu.rb@...renesas.com>
>>
>> Thanks for your patch!
>>
>>> --- a/arch/arm/boot/dts/r8a7742.dtsi
>>> +++ b/arch/arm/boot/dts/r8a7742.dtsi
>>> @@ -201,6 +201,16 @@
>>>                  #size-cells = <2>;
>>>                  ranges;
>>>
>>> +               rwdt: watchdog@...20000 {
>>> +                       compatible = "renesas,r8a7742-wdt",
>>> +                                    "renesas,rcar-gen2-wdt";
>>> +                       reg = <0 0xe6020000 0 0x0c>;
>>> +                       clocks = <&cpg CPG_MOD 402>;
>>> +                       power-domains = <&sysc R8A7742_PD_ALWAYS_ON>;
>>> +                       resets = <&cpg 402>;
>>> +                       status = "disabled";
>>
>> Missing "interrupts" property.
>>
> "interrupts" property isn't used by rwdt driver  and can be dropped
> from bindings file.

    DT describes the hardware, not its driver's abilities.

> Cheers,
> --Prabhakar

MBR, Sergei