Hi Tony, Thanks very much for suggestions, I am able to wakeup the uart (though it takes about 10 seconds till it wakeup). Anyway, after wakeup when I try to see the state I get: ~ # cat /dbg/pm_debug/count usbhost_pwrdm (ON),OFF:0,RET:0,INA:0,ON:1,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0 sgx_pwrdm (OFF),OFF:1,RET:0,INA:0,ON:1,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0 per_pwrdm (ON),OFF:0,RET:0,INA:0,ON:1,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0 dss_pwrdm (ON),OFF:0,RET:3,INA:4,ON:7,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0 cam_pwrdm (RET),OFF:0,RET:1,INA:0,ON:1,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0 core_pwrdm (ON),OFF:0,RET:0,INA:0,ON:1,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0,RET-MEMBANK2-OFF:0 neon_pwrdm (ON),OFF:0,RET:0,INA:0,ON:1,RET-LOGIC-OFF:0 mpu_pwrdm (ON),OFF:0,RET:0,INA:0,ON:1,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0 iva2_pwrdm (RET),OFF:0,RET:1,INA:0,ON:1,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0,RET-MEMBANK2-OFF:0,RET-MEMBANK3-OFF:0,RET-MEMBANK4-OFF:0 per_clkdm->per_pwrdm (11) usbhost_clkdm->usbhost_pwrdm (3) cam_clkdm->cam_pwrdm (0) dss_clkdm->dss_pwrdm (2) core_l4_clkdm->core_pwrdm (12) core_l3_clkdm->core_pwrdm (4) d2d_clkdm->core_pwrdm (0) sgx_clkdm->sgx_pwrdm (0) iva2_clkdm->iva2_pwrdm (0) neon_clkdm->neon_pwrdm (0) mpu_clkdm->mpu_pwrdm (0) prm_clkdm->wkup_pwrdm (0) cm_clkdm->core_pwrdm (0) ~ # cat /sys/devices/system/cpu/cpu0/cpuidle/state0/time 811807044 ~ # cat /sys/devices/system/cpu/cpu0/cpuidle/state2/time 0 ~ # cat /sys/devices/system/cpu/cpu0/cpuidle/state3/time 0 ~ # cat /sys/devices/system/cpu/cpu0/cpuidle/state4/time 0 ~ # cat /sys/devices/system/cpu/cpu0/cpuidle/state5/time 0 ~ # cat /sys/devices/system/cpu/cpu0/cpuidle/state6/time 0 Do you have any suggestion, how I can understnad why it did not get into retention and how to continue from this point ? Thanks very much, Ran On Mon, Nov 17, 2014 at 6:22 PM, Tony Lindgren <tony@xxxxxxxxxxx> wrote: > * 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
