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Date: Mon, 25 May 2015 00:52:45 +0800
Message-ID: <CADyBb7snhcR43KT_xrFipBH3PBNBfj39-hE-mSjJ3vMb7Ehp+A@mail.gmail.com>
Subject: Re: [PATCH v2 6/7] Watchdog: introduce ARM SBSA watchdog driver
From: Fu Wei <fu.wei@linaro.org>
To: Timur Tabi <timur@codeaurora.org>
Cc: Guenter Roeck <linux@roeck-us.net>,
        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>, vgandhi@codeaurora.org, 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>
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Hi Timur

On 25 May 2015 at 00:44, Timur Tabi <timur@codeaurora.org> wrote:
> Guenter Roeck wrote:
>
>> The current watchdog API suggests that the pretimeout "allows Linux
>> to record useful information (like panic information and kernel
>> coredumps) before it resets". The call to panic() would be the
>> means to make this happen.
>
>
> Now that I think about it, that does make sense.
>
> However, if a pre-timeout is not set, then the driver should never call
> panic().  That means that the interrupt handler should only be registered if
> sbsa_gwdt_set_pretimeout() is called.

I don't know why you want to do this tricky way.  you can always
register the interrupt handler,
if pre-timeout is 0, system will just trigger WS1 right after WS0


>
>
> --
> Sent by an employee of the Qualcomm Innovation Center, Inc.
> The Qualcomm Innovation Center, Inc. is a member of the
> Code Aurora Forum, hosted by The Linux Foundation.



-- 
Best regards,

Fu Wei
Software Engineer
Red Hat Software (Beijing) Co.,Ltd.Shanghai Branch
Ph: +86 21 61221326(direct)
Ph: +86 186 2020 4684 (mobile)
Room 1512, Regus One Corporate Avenue,Level 15,
One Corporate Avenue,222 Hubin Road,Huangpu District,
Shanghai,China 200021