Messages in this thread | | | Date | Fri, 29 May 2015 07:54:18 -0700 | From | Guenter Roeck <> | Subject | Re: [PATCH v3 5/6] Watchdog: introduce ARM SBSA watchdog driver |
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On 05/29/2015 02:11 AM, Fu Wei wrote: [ ... ]
>>> + >>> + status = sbsa_gwdt_cf_read(SBSA_GWDT_WCS, wdd); >>> + if (status & SBSA_GWDT_WCS_WS1) { >>> + dev_warn(dev, "System reset by WDT(WCS: %x, WCV: %llx)\n", >>> + status, sbsa_gwdt_get_wcv(wdd)); >> >> >> Does this message (specifically the WCS / WCV values) have any >> useful meaning for the user ? > > I think so, according to SBSA spec: > If WS0 is asserted and a timeout refresh occurs then the following must occur: > If the system is compliant to SBSA level 2 or higher the compare > value must retain its current value. This means that the compare value > records the time that WS1 is asserted. > > So, I think WCV can log the time when system reset by WDT, that may > help user figure out the problem. but WCS can be delete I think. >
How would that help ? It is just a number with no reference to anything.
Thanks, Guenter
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