Sender: Guenter Roeck <groeck7@gmail.com>
Date:   Mon, 20 Dec 2021 08:06:09 -0800
From:   Guenter Roeck <linux@roeck-us.net>
To:     Andrej Picej <andrej.picej@norik.com>
Cc:     support.opensource@diasemi.com, linux-watchdog@vger.kernel.org,
        wim@linux-watchdog.org, linux-kernel@vger.kernel.org,
        robh+dt@kernel.org, devicetree@vger.kernel.org,
        shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de,
        festevam@gmail.com, linux-imx@nxp.com,
        linux-arm-kernel@lists.infradead.org,
        cniedermaier@dh-electronics.com
Subject: Re: [PATCH v5 4/5] dt-bindings: watchdog: da9062: add watchdog
 timeout mode
Message-ID: <20211220160609.GA1379130@roeck-us.net>
References: <20211206064732.280375-1-andrej.picej@norik.com>
 <20211206064732.280375-4-andrej.picej@norik.com>
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On Mon, Dec 06, 2021 at 07:47:31AM +0100, Andrej Picej wrote:
> Document the watchdog timeout mode property. If this property is used
> the user can select what happens on watchdog timeout. Set this property
> to 1 to enable SHUTDOWN (the device resets), set it to 0 and the device
> will go to POWERDOWN on watchdog timeout.
> 
> If this property is not set, don't touch the WATCHDOG_SD bit and leave
> the configuration to OTP. This way backward compatibility is not broken.
> 
> Signed-off-by: Andrej Picej <andrej.picej@norik.com>
> Reviewed-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
> Acked-by: Rob Herring <robh@kernel.org>

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

> ---
> Changes in v5:
>  - no changes
> 
> Changes in v4:
>  - no changes
> 
> Changes in v3:
>  - add note about using the default OTP setting if this DT binding is
>    not specified
> 
> Changes in v2:
>  - new patch, document new DT binding
> ---
>  Documentation/devicetree/bindings/watchdog/da9062-wdt.txt | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/watchdog/da9062-wdt.txt b/Documentation/devicetree/bindings/watchdog/da9062-wdt.txt
> index 950e4fba8dbc..354314d854ef 100644
> --- a/Documentation/devicetree/bindings/watchdog/da9062-wdt.txt
> +++ b/Documentation/devicetree/bindings/watchdog/da9062-wdt.txt
> @@ -10,6 +10,12 @@ Optional properties:
>  - dlg,use-sw-pm: Add this property to disable the watchdog during suspend.
>  	Only use this option if you can't use the watchdog automatic suspend
>  	function during a suspend (see register CONTROL_B).
> +- dlg,wdt-sd: Set what happens on watchdog timeout. If this bit is set the
> +	watchdog timeout triggers SHUTDOWN, if cleared the watchdog triggers
> +	POWERDOWN. Can be 0 or 1. Only use this option if you want to change the
> +	default chip's OTP setting for WATCHDOG_SD bit. If this property is NOT
> +	set the WATCHDOG_SD bit and on timeout watchdog behavior will match the
> +	chip's OTP settings.
>  
>  Example: DA9062
>