Messages in this thread | | | Subject | Re: [PATCH v3] watchdog: Add watchdog timer support for the WinSystems EBC-C384 | From | Guenter Roeck <> | Date | Mon, 25 Jan 2016 17:26:32 -0800 |
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On 01/25/2016 03:36 PM, William Breathitt Gray wrote: > On 01/25/2016 03:42 PM, Guenter Roeck wrote: >> On 01/25/2016 11:28 AM, One Thousand Gnomes wrote: >>> If ask for 299 seconds surely I should get 300 not 240 ? >>> (Whether to round off or round up is an interesting question for the >>> middle range - does it go off early or late - I'd have said late but...) >>> >> >> Matter of endless discussion. Some argue that the value should be rounded >> up, some argue that it should be rounded down, some argue that it should >> be rounded to the closest match. Each camp has its own valid arguments. >> I usually leave it up to the driver's author to decide, with a slight >> preference to never select a value larger than requested. > > I implemented it to round down simply because it was the simplest > solution (i.e. integer truncation). Although I see merit in an > implementation that rounds to the closest valid value, I'll keep the > current implementation for now due to its simplicity; if enough users of > the driver prefer a different implementation, then I'll add it in a > later patch. > >>> Is there no ACPI entry for it ? >>> >> Same here. As long as the board is identified, I tend to leave it up >> to the driver author to decide _how_ to identify it. >> >> Only question for me would be if the watchdog timer is implemented >> in a Super-IO chip, and if so, if it would be possible to use the chip >> identification instead of a DMI (or ACPI) entry to instantiate the driver. > > I do not believe there is an ACPI entry for it. Interestingly, the > watchdog timer BIOS configuration option for this motherboard is listed > under the Super I/O menu; perhaps this watchdog timer is implemented in > the Super I/O chip. > Normally it is. Question is which one.
> The manual for this motherboard does not provide much information about > the Super I/O chip (no model number, etc.), and neither sensors-detect > nor superiotool was able to detect it. I've sent an email to the > motherboard company (WinSystems) requesting further information about > the Super I/O chip and whether the watchdog timer is built-in to the > Super I/O chip. >
Ah, I somehow thought you were associated with WinSystems, since you know how to configure the chip.
Did you get any useful output from sensors-detect or superiotool (like 'unknown chip xxxx'), or did those tools find nothing ?
Thanks, Guenter
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