On 18/03/16 17:52, Grygorii Strashko wrote: > On 03/18/2016 04:56 PM, Jon Hunter wrote: >> >> On 18/03/16 14:40, Jon Hunter wrote: >>> On 18/03/16 14:23, Grygorii Strashko wrote: >>>> On 03/18/2016 02:27 PM, Jon Hunter wrote: >>>>> >>>>> On 18/03/16 11:11, Grygorii Strashko wrote: >> >> [snip] >> >>>> oh :( That will require updating of all drivers (and if it will be taken into account that >>>> wakeup can be configured from sysfs + devm_ - it will be painful). >>> >>> Will it? I know that there are a few gpio chips that have some hacked >>> ways to get around the PM issue, but I wonder how many drivers this >>> really impacts. What sysfs entries are you referring too? > > echo enabled > /sys/devices/platform/44000000.ocp/48020000.serial/tty/ttyS2/power/wakeup > >> >> Thinking about this some more, yes I guess it would impact all drivers >> that use a gpio but don't use it for a wake-up. I could see that could >> be a few drivers indeed. > > yep. I've just tested it > - gpio was requested through sysfs and configured as IRQ > - do suspend > > the same is if GPIO is requested as IRQ only and not configured as wakeup source > > [ 319.669760] PM: late suspend of devices complete after 0.213 msecs > [ 319.671195] irq 191 has no wakeup set and has not been freed! > [ 319.673453] PM: noirq suspend of devices complete after 2.258 msecs > > this is very minimal configuration - the regular one is at ~30-50 devices > most of them will use IRQ and only ~10% are used as wakeup sources. Then it is working as intended :-) However, if this is too verbose for some irqchips, then as I mentioned we can have a flag to avoid these messages. Cheers Jon -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
