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    SubjectRe: [PATCH v4 5/7] Watchdog: introduce ARM SBSA watchdog driver
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    On 10 June 2015 at 22:22, Timur Tabi <timur@codeaurora.org> wrote:
    > Fu Wei wrote:
    >>
    >> Another weakness of only using WOR is the timeout limited by this
    >> 32bit register.
    >> 10s @400MHz generic Timer
    >>
    >> I don't think this limit is good for a server, once the server is in a
    >> heavy load
    >
    >
    > Perhaps, but if that's the limitation of the hardware, then so be it.

    it is not the real limitation, if we use WCV, SBSA spec has mentioned that.

    ------ SBSA 2.3-------Page 23 ----------
    Note: the watchdog offset register is 32 bits wide. This gives a
    maximum watch period of around 10s at a system
    counter frequency of 400MHz. If a larger watch period is required then
    the compare value can be programmed
    directly into the compare value register
    ------ SBSA 2.3-------Page 23 ----------

    if some hardware doesn't support writing WCV,
    that means this hardware is non-standard SBSA watchdog.

    >
    > --
    > 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


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