Hi Govindraj, On Mon, Jan 02, 2012 at 16:00:37, Govindraj wrote: > > currently runtime pm is available from omap-serial device and not from > tty_dev. > Setting tty_dev wakeup is to use irq_wakeup from suspend available > from serail_core layer which I think we are not using for omap-uart > and we use pad wakeup from suspend path. > > Also omap-uart.x/power/wakeup is used to gate uart clocks using runtime > PM api's in omap-serial driver. >
Thanks for clarifying. On AM335x, one of the UARTs is in a wakeup domain and swakeup from this is used to come out of suspend. I have basic suspend-resume working on it. Strangely this works irrespective of the value of tty_dev wakeup entry. Do you know if this is expected on OMAP? The other issue concerning runtime PM is that as soon as I set a non-zero to the autosuspend_delay_ms I get some garbage characters and eventually the console stops responding. [root@arago /]# cat .../omap_uart.0/power/autosuspend_delay_ms -1 [root@arago /]# echo 3000 > ÖKWëé«+×é«+wU.Éѹ,z,½Ý.ɽosuspend_delayÕ£½ÍÕÍ... [root@arago /]# <- No response after some time The comment in the code mentions delay is receiving characters if runtime PM is enabled. Any idea what's going wrong at my end? Regards, Vaibhav B. -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
