Hi Guenter, Am Freitag, den 07.08.2015, 06:36 -0700 schrieb Guenter Roeck: > On 08/06/2015 09:36 AM, Philipp Zabel wrote: > > There is a cooldown period after watchdog timer setup, and also after each > > watchdog ping. If a ping is issued too early, the watchdog triggers the > > watchdog error condition and causes a system reset. > > > > The 256 ms period length is a best guess based on the same value being used > > for the DA9053 predecessor PMIC and experiments that have shown 200 ms are > > not enough to avoid the error. > > > > Signed-off-by: Philipp Zabel <[email protected]> > > Hi Philipp, > > instead of using this quite complex approach, would it be possible to use the > same approach as the da9062 driver ? > > I understand the downside, which is that the caller may end up sleeping, > but this should not happen too often.
Depending on the userspace this can happen quite a lot ... > Also, I plan to move the enforcement > of a minimal time between heartbeats into the infrastructure, so this would > not least forever. ... but certainly taking care of this in the framework is better than doing it in the drivers. regards Philipp -- To unsubscribe from this list: send the line "unsubscribe linux-watchdog" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
