linux-kernel - RE: [PATCH V3 2/4] dt-bindings: watchdog: xlnx,versal-wwdt: Add versal watchdog bindings

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Message-ID: <BY5PR12MB4033849F2B1170B898CA6165939A9@BY5PR12MB4033.namprd12.prod.outlook.com>
Date:   Tue, 11 Apr 2023 10:46:58 +0000
From:   "Neeli, Srinivas" <srinivas.neeli@....com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        "Datta, Shubhrajyoti" <shubhrajyoti.datta@....com>,
        "Simek, Michal" <michal.simek@....com>,
        "Goud, Srinivas" <srinivas.goud@....com>,
        "wim@...ux-watchdog.org" <wim@...ux-watchdog.org>,
        "linux@...ck-us.net" <linux@...ck-us.net>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>
CC:     "linux-watchdog@...r.kernel.org" <linux-watchdog@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "git (AMD-Xilinx)" <git@....com>,
        "git@...inx.com" <git@...inx.com>,
        "neelisrinivas18@...il.com" <neelisrinivas18@...il.com>
Subject: RE: [PATCH V3 2/4] dt-bindings: watchdog: xlnx,versal-wwdt: Add
 versal watchdog bindings

Hi Krzysztof,

> -----Original Message-----
> From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> Sent: Tuesday, April 4, 2023 12:03 AM
> To: Neeli, Srinivas <srinivas.neeli@....com>; Datta, Shubhrajyoti
> <shubhrajyoti.datta@....com>; Simek, Michal <michal.simek@....com>;
> Goud, Srinivas <srinivas.goud@....com>; wim@...ux-watchdog.org;
> linux@...ck-us.net; robh+dt@...nel.org; krzysztof.kozlowski+dt@...aro.org
> Cc: linux-watchdog@...r.kernel.org; devicetree@...r.kernel.org; linux-
> kernel@...r.kernel.org; linux-arm-kernel@...ts.infradead.org; git (AMD-
> Xilinx) <git@....com>; git@...inx.com; neelisrinivas18@...il.com
> Subject: Re: [PATCH V3 2/4] dt-bindings: watchdog: xlnx,versal-wwdt: Add
> versal watchdog bindings
> 
> On 31/03/2023 09:41, Srinivas Neeli wrote:
> > Versal watchdog driver uses window watchdog mode. Window watchdog
> 
> Subject: drop second/last, redundant "bindings". The "dt-bindings"
> prefix is already stating that these are bindings.
> 
> > timer(WWDT) contains closed(first) and open(second) window with
> > 32 bit width. Write to the watchdog timer within predefined window
> > periods of time. This means a period that is not too soon and a period
> > that is not too late.
> >
> > This patch adds devicetree bindings for versal window watchdog device.
> 
> Do not use "This commit/patch", but imperative mood. See:
> https://elixir.bootlin.com/linux/v5.17.1/source/Documentation/process/sub
> mitting-patches.rst#L95
> 

Thanks for review,
I will address all changes in next version.

> >
> > Signed-off-by: Srinivas Neeli <srinivas.neeli@....com>
> > ---
> > Changes in V3:
> > - Removed  xlnx,close_percent property.
> > Changes in V2:
> > - Added watchdog ref
> > - Removed timeout-sec property
> > - Used 4 spaces for example indentation.
> > ---
> >  .../bindings/watchdog/xlnx,versal-wwdt.yaml   | 50 +++++++++++++++++++
> >  1 file changed, 50 insertions(+)
> >  create mode 100644
> > Documentation/devicetree/bindings/watchdog/xlnx,versal-wwdt.yaml
> >
> > diff --git
> > a/Documentation/devicetree/bindings/watchdog/xlnx,versal-wwdt.yaml
> > b/Documentation/devicetree/bindings/watchdog/xlnx,versal-wwdt.yaml
> > new file mode 100644
> > index 000000000000..dea1e7c487d3
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/watchdog/xlnx,versal-
> wwdt.yaml
> > @@ -0,0 +1,50 @@
> > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) %YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/watchdog/xlnx,versal-wwdt.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Xilinx Versal window watchdog timer controller
> > +
> > +maintainers:
> > +  - Neeli Srinivas <srinivas.neeli@....com>
> > +
> > +description:
> > +  Versal watchdog driver uses window watchdog mode. Window watchdog
> 
> What is driver? If you mean Linux driver, then drop all references to it and
> rephrase to describe hardware.
> 
> > +  timer(WWDT) contains closed(first) and open(second) window with
> > +  32 bit width. Write to the watchdog timer within predefined window
> > + periods of time. This means a period that is not too soon and a
> > + period that is not too late. The WWDT has to be restarted within
> > + the open window time. If software tries to restart WWDT outside of
> > + the open window time period, it generates a reset.
> > +
> > +allOf:
> > +  - $ref: /schemas/watchdog/watchdog.yaml#
> 
> All other examples reference local watchdog.yaml. Don't do it differently
> than others (git grep watchdog.yaml)
> 
> > +
> 
> Best regards,
> Krzysztof