From mboxrd@z Thu Jan  1 00:00:00 1970
From: Guenter Roeck <linux@roeck-us.net>
Subject: Re: [PATCH v4 5/7] Watchdog: introduce ARM SBSA watchdog driver
Date: Wed, 10 Jun 2015 22:13:50 -0700
Message-ID: <5579190E.8000803@roeck-us.net>
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To: Timur Tabi <timur@codeaurora.org>, Fu Wei <fu.wei@linaro.org>
Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>, Linaro ACPI Mailman List <linaro-acpi@lists.linaro.org>, linux-watchdog@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, Wei Fu <tekkamanninja@gmail.com>, G Gregory <graeme.gregory@linaro.org>, Al Stone <al.stone@linaro.org>, Hanjun Guo <hanjun.guo@linaro.org>, Ashwin Chaugule <ashwin.chaugule@linaro.org>, Arnd Bergmann <arnd@arndb.de>, Vipul Gandhi <vgandhi@codeaurora.org>, Wim Van Sebroeck <wim@iguana.be>, Jon Masters <jcm@redhat.com>, Leo Duran <leo.duran@amd.com>, Jon Corbet <corbet@lwn.net>, Mark Rutland <mark.rutland@arm.com>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will.deacon@arm.com>, rjw@rjwysocki.net
List-Id: devicetree@vger.kernel.org

On 06/10/2015 08:45 PM, Timur Tabi wrote:
> Fu Wei wrote:
>> Could you suggest a good way to use WS0, so we can follow SBSA spec?
>
> To avoid the timeout/2 problem, WS0 calls panic, which is the "real" timeout/reset.  WS1 is then a "backup" that is ignored by the driver. That is, the driver doesn't do anything with WS1 and it doesn't tell the kernel about WS1.
>
> I know you don't like the idea of WS1 as a backup timeout, but this is one way to solve the problem.
>
This is what I would do.

Guenter