[U-Boot-Users] [PATCH] lwmon5 watchdog: limit trigger rate

Stefan Roese
2008-04-24T14:43:08Z

On Tuesday 22 April 2008, Wolfgang Denk wrote:
> From: Yuri Tikhonov <yur@emcraft.com>
>
> Limit the rate of h/w watch-dog triggering on the LWMON5 board by
> the CONFIG_WD_MAX_RATE value.
>
> Note that an earlier version of this patch which used microseconds
> instead of ticks dis not work. The problem was that we used
> usec2ticks() to convert microseconds into ticks. usec2ticks() uses
> get_tbclk(), which in turn calls get_sys_info(). It turns out that
> this function does a lot of prolonged operations (like divisions)
> which take too much time so we do not trigger the watchdog in time,
> and it resets the system.
>
> Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

Applied to u-boot-ppc4xx repository. Thanks.

Best regards,
Stefan

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