linux-kernel - Re: [PATCH v2 7/7] dt-bindings: watchdog: allow "timer" as node name

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Message-ID: <20230113140333.GG1606649@roeck-us.net>
Date:   Fri, 13 Jan 2023 06:03:33 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-watchdog@...r.kernel.org,
        Rob Herring <robh@...nel.org>
Subject: Re: [PATCH v2 7/7] dt-bindings: watchdog: allow "timer" as node name

On Fri, Jan 13, 2023 at 11:33:46AM +0100, Krzysztof Kozlowski wrote:
> On some SoCs the watchdog device is actually mixed with timer, e.g.
> the qcom,msm-timer on older Qualcomm SoCs where this is actually one
> hardware block responsible for both system timer and watchdog.
> 
> Allow calling such device nodes as "timer".
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> Reviewed-by: Rob Herring <robh@...nel.org>
> 

Reviewed-by: Guenter Roeck <linux@...ck-us.net>

> ---
> 
> Changes since v1:
> 1. Add tag.
> 
> See also:
> https://lore.kernel.org/linux-arm-msm/20221212163532.142533-1-krzysztof.kozlowski@linaro.org/T/#t
> 
> which causes warnings:
> 
> qcom-msm8960-cdp.dtb: timer@...a000: $nodename:0: 'timer@...a000' does not match '^watchdog(@.*|-[0-9a-f])?$'
>   From schema: Documentation/devicetree/bindings/watchdog/qcom-wdt.yaml
> ---
>  Documentation/devicetree/bindings/watchdog/watchdog.yaml | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/watchdog/watchdog.yaml b/Documentation/devicetree/bindings/watchdog/watchdog.yaml
> index fccae0d00110..519b48889eb1 100644
> --- a/Documentation/devicetree/bindings/watchdog/watchdog.yaml
> +++ b/Documentation/devicetree/bindings/watchdog/watchdog.yaml
> @@ -14,9 +14,14 @@ description: |
>    This document describes generic bindings which can be used to
>    describe watchdog devices in a device tree.
>  
> +select:
> +  properties:
> +    $nodename:
> +      pattern: "^watchdog(@.*|-[0-9a-f])?$"
> +
>  properties:
>    $nodename:
> -    pattern: "^watchdog(@.*|-[0-9a-f])?$"
> +    pattern: "^(timer|watchdog)(@.*|-[0-9a-f])?$"
>  
>    timeout-sec:
>      description:
> -- 
> 2.34.1
>