linux-kernel - Re: [PATCH v3 2/7] dt-bindings: watchdog: dw-wdt: Support devices with asynch clocks

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Date:   Fri, 29 May 2020 15:53:45 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Serge Semin <Sergey.Semin@...kalelectronics.ru>
Cc:     Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Rob Herring <robh+dt@...nel.org>,
        Serge Semin <fancer.lancer@...il.com>,
        Rob Herring <robh@...nel.org>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Arnd Bergmann <arnd@...db.de>, linux-mips@...r.kernel.org,
        linux-watchdog@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/7] dt-bindings: watchdog: dw-wdt: Support devices
 with asynch clocks

On Tue, May 26, 2020 at 06:41:18PM +0300, Serge Semin wrote:
> DW Watchdog IP core can be synthesised with asynchronous timer/APB
> clocks support (WDT_ASYNC_CLK_MODE_ENABLE == 1). In this case
> separate clock signals are supposed to be used to feed watchdog timer
> and APB interface of the device. Let's update the DW Watchdog DT node
> schema so it would support the optional APB3 bus clock specified along
> with the mandatory watchdog timer reference clock.
> 
> Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
> Reviewed-by: Rob Herring <robh@...nel.org>
> Cc: Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>
> Cc: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
> Cc: Arnd Bergmann <arnd@...db.de>
> Cc: linux-mips@...r.kernel.org

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

> ---
> 
> Changelog v2:
> - It's a new patch unpinned from the previous one.
> ---
>  .../devicetree/bindings/watchdog/snps,dw-wdt.yaml         | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/watchdog/snps,dw-wdt.yaml b/Documentation/devicetree/bindings/watchdog/snps,dw-wdt.yaml
> index 4f6944756ab4..5bf6dc6377f3 100644
> --- a/Documentation/devicetree/bindings/watchdog/snps,dw-wdt.yaml
> +++ b/Documentation/devicetree/bindings/watchdog/snps,dw-wdt.yaml
> @@ -24,8 +24,16 @@ properties:
>      maxItems: 1
>  
>    clocks:
> +    minItems: 1
>      items:
>        - description: Watchdog timer reference clock
> +      - description: APB3 interface clock
> +
> +  clock-names:
> +    minItems: 1
> +    items:
> +      - const: tclk
> +      - const: pclk
>  
>    resets:
>      description: Phandle to the DW Watchdog reset lane