* Paul Walmsley <paul@xxxxxxxxx> [140729 01:27]: > On Mon, 28 Jul 2014, Tony Lindgren wrote: > > > Hmm I think the difference with the working v3.10 one is that you have > > root=/dev/mmcblk0p2 instead of root=/dev/nfs. As the Ethernet on beagle > > is on the USB EHCI, this is still blocking the deeper idle states AFAIK. > > Hmm? There's no Ethernet on the 3530 Beagle. > > The hardware configuration on those two boards - the 37xxevm and > the 3530es3beagle - hasn't changed between the two test runs, AFAIK. Oh it's the original beagle, sorry. In that case the uart wake interrupts need to be enabled for the serial wake to work. I did not do that as I don't have one. I guess that might explain why it fails? Or are you using RTC wake for your test? > Just to take the Beagle out of the equation, here's a test with the > 37xxevm on 3.11 where it passes the dynamic idle tests: > > http://www.pwsan.com/omap/testlogs/test_v3.11/20130902150604/pm/37xxevm/37xxevm_log.txt > > And here's one on the 37xxevm on 3.16-rc7 where it fails: > > http://www.pwsan.com/omap/testlogs/test_v3.11/20130902150604/pm/37xxevm/37xxevm_log.txt Wrong link here :) It should be: http://www.pwsan.com/omap/testlogs/test_v3.16-rc7/20140727174803/pm/37xxevm/37xxevm_log.txt > I should probably read back those writes to autosuspend_delay_ms, just to > make sure they are reaching the right destinations. But you might want to > confirm that you can see the CORE RET count increasing during dynamic idle > on your 37xxevm. Hmm seems to work on 37xxevm for me with my retention test script: uarts=$(find /sys/class/tty/ttyO*/device/power/ -type d) for uart in $uarts; do echo 3000 > $uart/autosuspend_delay_ms done uarts=$(find /sys/class/tty/ttyO*/power/ -type d) for uart in $uarts; do echo enabled > $uart/wakeup echo auto > $uart/control done echo 0 > /sys/kernel/debug/pm_debug/enable_off_mode Which produces: core_pwrdm (ON),OFF:0,RET:7,INA:0,ON:8,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0,RET-MEMBANK2-OFF:0 And then setting enable_off_mode: core_pwrdm (ON),OFF:15,RET:100,INA:8,ON:124,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0,RET-MEMBANK2-OFF:0 And I'm using UART3 like I mentioned earlier, but I doubt that makes a difference. Are you maybe missing "echo auto > $uart/control"? Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
