* Ran Shalit <ranshalit@xxxxxxxxx> [141116 12:13]: > Hello, > > I'm using OMAP3530 with custom board. I have enabled all power mode > features as described in PSP wiki, but it still fails to enter any > state different from state0. Works for me with pretty much all omap3 boards I have here with mainline kernel since v3.17 using omap2plus_defconfig. And the following script to idle uarts and enable off-idle (or retention). USB needs to be disconnected and EHCI probably still cannot be enabled. > The next thing was trying to get the uart to sleep (though there might > be also problems with other domains ?) . > > On trying to enable uart as wakeup source I get the following: > > echo enabled > /sys/devices/platform/omap/omap_uart.2/power/wakeup > > cat /sys/devices/platform/omap/omap_uart.2/power/wakeup > > #> disabled (?????) > > echo 1 > /sys/devices/platform/omap/omap_uart.2/sleep_timeout > ~ # [ 85.006622] omap_device: omap_uart.2: new worst case deactivate > latency 0: 61035 > [ 85.559844] omap_device: omap_uart.2: new worst case activate > latency 0: 61035 > [ 982.415161] omap_device: omap_uart.2: new worst case deactivate > latency 0: 91552 > > < console hangs here > Sounds like you need to enable the wake-up interrupt for the UART. See the interrupts-extended entry for many omap3-*.dts files: interrupts-extended = <&intc 74 &omap3_pmx_core OMAP3_UART3_RX>; If you get it working, care to update the instructions in the wiki too? Regards, Tony 8< ---------------------- #!/bin/bash uarts=$(find /sys/class/tty/tty[SO]*/device/power/ -type d) for uart in $uarts; do echo 3000 > $uart/autosuspend_delay_ms 2>&1 done uarts=$(find /sys/class/tty/ttyO*/power/ -type d 2>/dev/null) for uart in $uarts; do echo enabled > $uart/wakeup 2>&1 echo auto > $uart/control 2>&1 done echo 1 > /sys/kernel/debug/pm_debug/enable_off_mode -- 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
