怘€æ€˜€`3f<€fÀæøÀ̆ž?`??f?æžf<øž`??ð3ž<3ž<` at 0 [ 0.609832] edma-dma-engine edma-dma-engine.0: Can't allocate PaRAM dummy slot [ 0.609893] edma-dma-engine: probe of edma-dma-engine.0 failed with error -5 [ 0.720977] omap-dma-engine 48056000.dma-controller: OMAP DMA engine driver [ 0.722900] of_get_named_gpiod_flags exited with status -517 [ 0.722961] platform hsusb2_power_reg.7: Driver reg-fixed-voltage requests probe deferral [ 0.735595] SCSI subsystem initialized [ 0.739685] usbcore: registered new interface driver usbfs [ 0.740325] usbcore: registered new interface driver hub [ 0.741088] usbcore: registered new device driver usb [ 0.741821] of_get_named_gpiod_flags exited with status 0 [ 0.742156] platform hsusb2_phy.8: Driver usb_phy_gen_xceiv requests probe deferral [ 0.751678] omap_i2c 48070000.i2c: bus 0 rev4.4 at 2600 kHz [ 0.753723] omap_i2c 48072000.i2c: bus 1 rev4.4 at 400 kHz [ 0.757659] omap_i2c 48060000.i2c: bus 2 rev4.4 at 100 kHz [ 0.769378] Switched to clocksource 32k_counter [ 1.013580] NET: Registered protocol family 2 [ 1.015991] TCP established hash table entries: 4096 (order: 2, 16384 bytes) [ 1.016265] TCP bind hash table entries: 4096 (order: 5, 147456 bytes) [ 1.018554] TCP: Hash tables configured (established 4096 bind 4096) [ 1.018737] TCP: reno registered [ 1.018798] UDP hash table entries: 256 (order: 2, 20480 bytes) [ 1.019104] UDP-Lite hash table entries: 256 (order: 2, 20480 bytes) [ 1.021118] NET: Registered protocol family 1 [ 1.023162] RPC: Registered named UNIX socket transport module. [ 1.023193] RPC: Registered udp transport module. [ 1.023223] RPC: Registered tcp transport module. [ 1.023223] RPC: Registered tcp NFSv4.1 backchannel transport module. [ 1.024902] hw perfevents: enabled with ARMv7 Cortex-A8 PMU driver, 5 counters available [ 1.038940] futex hash table entries: 256 (order: 2, 16384 bytes) [ 1.252960] VFS: Disk quotas dquot_6.5.2 [ 1.253295] Dquot-cache hash table entries: 1024 (order 0, 4096 bytes) [ 1.256164] NFS: Registering the id_resolver key type [ 1.256713] Key type id_resolver registered [ 1.256713] Key type id_legacy registered [ 1.256896] jffs2: version 2.2. (NAND) (SUMMARY) © 2001-2006 Red Hat, Inc. [ 1.257476] msgmni has been set to 984 [ 1.262481] io scheduler noop registered [ 1.262512] io scheduler deadline registered [ 1.262603] io scheduler cfq registered (default) [ 1.268035] pinctrl-single 48002030.pinmux: 284 pins at pa fa002030 size 568 [ 1.268798] pinctrl-single 48002a00.pinmux: 46 pins at pa fa002a00 size 92 [ 1.270385] pinctrl-single 480025a0.pinmux: 46 pins at pa fa0025a0 size 92 [ 1.276702] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled [ 1.288574] omap_uart 4806a000.serial: no wakeirq for uart0 [ 1.288635] of_get_named_gpiod_flags: can't parse gpios property of node '/ocp/serial@4806a000[0]' [ 1.290374] 4806a000.serial: ttyO0 at MMIO 0x4806a000 (irq = 88, base_baud = 3000000) is a OMAP UART0 [ 1.293701] omap_uart 4806c000.serial: no wakeirq for uart0 [ 1.293762] of_get_named_gpiod_flags: can't parse gpios property of node '/ocp/serial@4806c000[0]' [ 1.294494] 4806c000.serial: ttyO1 at MMIO 0x4806c000 (irq = 89, base_baud = 3000000) is a OMAP UART1 [ 1.296966] omap_uart 49020000.serial: no wakeirq for uart0 [ 1.297027] of_get_named_gpiod_flags: can't parse gpios property of node '/ocp/serial@49020000[0]' [ 1.297729] 49020000.serial: ttyO2 at MMIO 0x49020000 (irq = 90, base_baud = 3000000) is a OMAP UART2 [ 1.758026] console [ttyO2] enabled [ 1.762756] omap_uart 49042000.serial: no wakeirq for uart0 [ 1.765838] of_get_named_gpiod_flags: can't parse gpios property of node '/ocp/serial@49042000[0]' [ 1.771545] 49042000.serial: ttyO3 at MMIO 0x49042000 (irq = 96, base_baud = 3000000) is a OMAP UART3 [ 1.828643] brd: module loaded [ 1.859161] loop: module loaded [ 1.876770] twl 0-0048: PIH (irq 23) chaining IRQs 306..314 [ 1.880615] twl 0-0048: power (irq 311) chaining IRQs 314..321 [ 1.893432] VAUX1: at 3000 mV [ 1.900360] usb_1v8: 1800 mV [ 1.905639] VAUX3: at 2800 mV [ 1.911132] VAUX4: at 2800 mV [ 1.916412] VDD1: 600 <--> 1450 mV at 1200 mV [ 1.923248] VDAC: 1800 mV [ 1.930145] VIO: at 1800 mV [ 1.935821] VINTANA1: 1500 mV [ 1.942047] VINTANA2: at 2750 mV [ 1.947937] VINTDIG: 1500 mV [ 1.953063] VMMC1: 1850 <--> 3150 mV at 3000 mV [ 1.959106] VMMC2: 1850 <--> 3150 mV at 2600 mV [ 1.965209] VUSB1V5: 1500 mV [ 1.970306] VUSB1V8: 1800 mV [ 1.974853] VUSB3V1: 3100 mV [ 1.981109] VPLL1: at 1800 mV [ 1.986541] VPLL2: 1800 mV [ 1.992156] VSIM: 1800 <--> 3000 mV at 1800 mV [ 1.998168] twl4030_gpio twl4030-gpio: gpio (irq 306) chaining IRQs 322..339 [ 2.002960] gpiochip_find_base: found new base at 492 [ 2.007385] gpiochip_add: registered GPIOs 492 to 511 on device: twl4030 [ 2.027130] mtdoops: mtd device (mtddev=name/number) must be supplied [ 2.054595] usbcore: registered new interface driver asix [ 2.058166] usbcore: registered new interface driver ax88179_178a [ 2.062408] usbcore: registered new interface driver cdc_ether [ 2.066192] usbcore: registered new interface driver r815x [ 2.070709] usbcore: registered new interface driver smsc95xx [ 2.074462] usbcore: registered new interface driver net1080 [ 2.078155] usbcore: registered new interface driver cdc_subset [ 2.082397] usbcore: registered new interface driver zaurus [ 2.086181] usbcore: registered new interface driver cdc_ncm [ 2.092559] usbcore: registered new interface driver cdc_wdm [ 2.096374] usbcore: registered new interface driver usb-storage [ 2.100860] usbcore: registered new interface driver usbtest [ 2.110778] mousedev: PS/2 mouse device common for all mice [ 2.122192] input: twl4030_pwrbutton as /devices/68000000.ocp/48070000.i2c/i2c-0/0-0048/pwrbutton.34/input/input0 [ 2.134552] twl_rtc rtc.10: Power up reset detected. [ 2.137512] twl_rtc rtc.10: Enabling TWL-RTC [ 2.145935] twl_rtc rtc.10: rtc core: registered rtc.10 as rtc0 [ 2.151306] i2c /dev entries driver [ 2.158874] Driver for 1-wire Dallas network protocol. [ 2.170288] omap_wdt: OMAP Watchdog Timer Rev 0x31: initial timeout 60 sec [ 2.181365] of_get_named_gpiod_flags: can't parse gpios property of node '/ocp/mmc@4809c000[0]' [ 2.186126] of_get_named_gpiod_flags: can't parse gpios property of node '/ocp/mmc@4809c000[0]' [ 2.196258] omap_hsmmc 4809c000.mmc: pins are not configured from the driver [ 2.247619] usbcore: registered new interface driver usbhid [ 2.250854] usbhid: USB HID core driver [ 2.257293] oprofile: using arm/armv7 [ 2.260437] TCP: cubic registered [ 2.262268] Initializing XFRM netlink socket [ 2.264739] NET: Registered protocol family 17 [ 2.267272] NET: Registered protocol family 15 [ 2.270294] Key type dns_resolver registered [ 2.279754] ThumbEE CPU extension supported. [ 2.288635] VPLL2: disabling [ 2.291412] VUSB3V1: disabling [ 2.294006] VUSB1V8: disabling [ 2.296508] VUSB1V5: disabling [ 2.299896] VDAC: disabling [ 2.302703] VAUX3: disabling [ 2.305328] regulator-dummy: disabling [ 2.312225] gpiochip_add: registered GPIOs 160 to 191 on device: gpio [ 2.319091] of_get_named_gpiod_flags exited with status 0 [ 2.325958] hsusb2_vbus: 3300 mV [ 2.328704] of_get_named_gpiod_flags exited with status 0 [ 2.337951] of_get_named_gpiod_flags exited with status 0 [ 2.343017] mmc0: host does not support reading read-only switch. assuming write-enable. [ 2.348297] input: gpio_keys.6 as /devices/gpio_keys.6/input/input1 [ 2.353302] mmc0: new high speed SDHC card at address 1234 [ 2.362670] mmcblk0: mmc0:1234 SA04G 3.68 GiB [ 2.372650] twl_rtc rtc.10: setting system clock to 2000-01-01 00:00:00 UTC (946684800) [ 2.458465] mmcblk0: p1 p2 [ 4.893646] kjournald starting. Commit interval 5 seconds [ 4.897155] EXT3-fs (mmcblk0p2): warning: maximal mount count reached, running e2fsck is recommended [ 5.302185] EXT3-fs (mmcblk0p2): using internal journal [ 5.314086] EXT3-fs (mmcblk0p2): recovery complete [ 5.316711] EXT3-fs (mmcblk0p2): mounted filesystem with ordered data mode [ 5.320770] VFS: Mounted root (ext3 filesystem) on device 179:2. [ 5.331665] devtmpfs: mounted [ 5.334228] Freeing unused kernel memory: 384K (c078c000 - c07ec000) INIT: version 2.86 booting Starting the hotplug events dispatcher udevd Synthesizing the initial hotplug events [ 6.500244] udevd (835): /proc/835/oom_adj is deprecated, please use /proc/835/oom_score_adj instead. [ 15.714050] random: nonblocking pool is initialized [ 15.760314] FAT-fs (mmcblk0p1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck. Remounting root file system... mount: according to mtab, /proc is already mounted on /proc WARNING: Couldn't open directory /lib/modules/3.14.0-rc6-51036-gfa389e2: No such file or directory FATAL: Could not open /lib/modules/3.14.0-rc6-51036-gfa389e2/modules.dep.temp for writing: No such file or directory root: mount: mount point /proc/bus/usb does not exist Setting up IP spoofing protection: rp_filter. Configuring network interfaces... modprobe: FATAL: Could not load /lib/modules/3.14.0-rc6-51036-gfa389e2/modules.dep: No such file or directory modprobe: FATAL: Could not load /lib/modules/3.14.0-rc6-51036-gfa389e2/modules.dep: No such file or directory ifconfig: SIOCGIFFLAGS: No such device modprobe: FATAL: Could not load /lib/modules/3.14.0-rc6-51036-gfa389e2/modules.dep: No such file or directory modprobe: FATAL: Could not load /lib/modules/3.14.0-rc6-51036-gfa389e2/modules.dep: No such file or directory modprobe: FATAL: Could not load /lib/modules/3.14.0-rc6-51036-gfa389e2/modules.dep: No such file or directory modprobe: FATAL: Could not load /lib/modules/3.14.0-rc6-51036-gfa389e2/modules.dep: No such file or directory eth0 No such device modprobe: FATAL: Could not load /lib/modules/3.14.0-rc6-51036-gfa389e2/modules.dep: No such file or directory modprobe: FATAL: Could not load /lib/modules/3.14.0-rc6-51036-gfa389e2/modules.dep: No such file or directory udhcpc: SIOCGIFINDEX: No such device done. Starting portmap daemon: portmap. Tue Jul 22 00:18:00 UTC 2008 INIT: Entering runlevel: 5 ALSA: Restoring mixer settings... /usr/sbin/alsactl: load_state:1327: No soundcards found... Starting Dropbear SSH server: modprobe: FATAL: Could not load /lib/modules/3.14.0-rc6-51036-gfa389e2/modules.dep: No such file or directory modprobe: FATAL: Could not load /lib/modules/3.14.0-rc6-51036-gfa389e2/modules.dep: No such file or directory dropbear. Starting advanced power management daemon: No APM support in kernel (failed.) Starting system message bus: dbus. Starting syslogd/klogd: start-stop-daemon: lseek: Invalid argument * Starting Avahi mDNS/DNS-SD Daemon: avahi-daemon [ ok ] Starting Bluetooth subsystem:modprobe: FATAL: Could not load /lib/modules/3.14.0-rc6-51036-gfa389e2/modules.dep: No such file or directory hcid hid2hci. .-------. | | .-. | | |-----.-----.-----.| | .----..-----.-----. | | | __ | ---'| '--.| .-'| | | | | | | | |--- || --'| | | ' | | | | '---'---'--'--'--. |-----''----''--' '-----'-'-'-' -' | '---' The Angstrom Distribution beagleboard ttyO2 Angstrom 2008.1-test-20080712 beagleboard ttyO2 beagleboard login: .-------. | | .-. | | |-----.-----.-----.| | .----..-----.-----. | | | __ | ---'| '--.| .-'| | | | | | | | |--- || --'| | | ' | | | | '---'---'--'--'--. |-----''----''--' '-----'-'-'-' -' | '---' The Angstrom Distribution beagleboard ttyO2 Angstrom 2008.1-test-20080712 beagleboard ttyO2 beagleboard login: .-------. | | .-. | | |-----.-----.-----.| | .----..-----.-----. | | | __ | ---'| '--.| .-'| | | | | | | | |--- || --'| | | ' | | | | '---'---'--'--'--. |-----''----''--' '-----'-'-'-' -' | '---' The Angstrom Distribution beagleboard ttyO2 Angstrom 2008.1-test-20080712 beagleboard ttyO2 beagleboard login: root login[2127]: root login on `ttyO2' root@beagleboard:~# root@beagleboard:~# %% Start PM consolidated quick test %% Preparation root@beagleboard:~# root@beagleboard:~# mount -t sysfs none /sys mount: none already mounted or /sys busy mount: according to mtab, sysfs is already mounted on /sys root@beagleboard:~# root@beagleboard:~# mount -t debugfs none /debug root@beagleboard:~# root@beagleboard:~# root@beagleboard:~# root@beagleboard:~# for u in `ls -1d /sys/bus/platform/drivers/omap_uart/*.seria l | paste -s -d' '`; do echo -1 > $u/power/autosuspend_delay_ms; done root@beagleboard:~# root@beagleboard:~# echo 0 > /debug/pm_debug/enable_off_mode root@beagleboard:~# root@beagleboard:~# %% Baseline pm_debug count dump cat /debug/pm_debug/count usbhost_pwrdm (ON),OFF:0,RET:1354,INA:0,ON:1355,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 core_pwrdm (ON),OFF:0,RET:0,INA:0,ON:1,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0,RET-MEMBANK2-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:1354,INA:0,ON:1355,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 neon_pwrdm (ON),OFF:0,RET:1354,INA:0,ON:1355,RET-LOGIC-OFF:0 mpu_pwrdm (ON),OFF:0,RET:1354,INA:0,ON:1355,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 usbhost_clkdm->usbhost_pwrdm (1) sgx_clkdm->sgx_pwrdm (0) per_clkdm->per_pwrdm (14) cam_clkdm->cam_pwrdm (0) dss_clkdm->dss_pwrdm (1) d2d_clkdm->core_pwrdm (0) iva2_clkdm->iva2_pwrdm (0) mpu_clkdm->mpu_pwrdm (0) core_l4_clkdm->core_pwrdm (22) core_l3_clkdm->core_pwrdm (1) neon_clkdm->neon_pwrdm (0) root@beagleboard:~# root@beagleboard:~# echo enabled > /sys/devices/44000000.ocp/48020000.serial/tty /ttyO2/power/wakeup -sh: cannot create /sys/devices/44000000.ocp/48020000.serial/tty/ttyO2/power/wakeup: nonexistent directory root@beagleboard:~# %% Start retention double suspend/resume UART wakeup test echo mem > /sys/power/state [ 33.027679] PM: Syncing filesystems ... done. [ 34.667297] PM: Preparing system for mem sleep [ 34.688842] Freezing user space processes ... (elapsed 0.002 seconds) done. [ 34.695953] Freezing remaining freezable tasks ... (elapsed 0.003 seconds) done. [ 34.703277] PM: Entering mem sleep [ 34.705139] Suspending console(s) (use no_console_suspend to debug) [ 34.732208] PM: suspend of devices complete after 18.066 msecs [ 34.737945] PM: late suspend of devices complete after 5.676 msecs [ 34.744537] PM: noirq suspend of devices complete after 6.591 msecs [ 34.744628] Disabling non-boot CPUs ... [ 34.744720] Successfully put all powerdomains to target state [ 34.748748] PM: noirq resume of devices complete after 3.906 msecs [ 34.754272] PM: early resume of devices complete after 4.211 msecs [ 34.828247] PM: resume of devices complete after 73.852 msecs [ 34.860839] PM: Finishing wakeup. [ 34.862640] Restarting tasks ... done. root@beagleboard:~# root@beagleboard:~# root@beagleboard:~# root@beagleboard:~# cat /debug/pm_debug/count usbhost_pwrdm (ON),OFF:0,RET:1473,INA:0,ON:1474,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 core_pwrdm (ON),OFF:0,RET:1,INA:0,ON:2,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0,RET-MEMBANK2-OFF:0 per_pwrdm (ON),OFF:0,RET:1,INA:0,ON:2,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0 dss_pwrdm (ON),OFF:0,RET:1473,INA:0,ON:1474,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 neon_pwrdm (ON),OFF:0,RET:1473,INA:0,ON:1474,RET-LOGIC-OFF:0 mpu_pwrdm (ON),OFF:0,RET:1473,INA:0,ON:1474,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 usbhost_clkdm->usbhost_pwrdm (1) sgx_clkdm->sgx_pwrdm (0) per_clkdm->per_pwrdm (14) cam_clkdm->cam_pwrdm (0) dss_clkdm->dss_pwrdm (1) d2d_clkdm->core_pwrdm (0) iva2_clkdm->iva2_pwrdm (0) mpu_clkdm->mpu_pwrdm (0) core_l4_clkdm->core_pwrdm (27) core_l3_clkdm->core_pwrdm (1) neon_clkdm->neon_pwrdm (0) root@beagleboard:~# root@beagleboard:~# root@beagleboard:~# root@beagleboard:~# echo mem > /sys/power/state [ 36.962677] PM: Syncing filesystems ... done. [ 38.202301] PM: Preparing system for mem sleep [ 38.206848] Freezing user space processes ... (elapsed 0.002 seconds) done. [ 38.213134] Freezing remaining freezable tasks ... (elapsed 0.002 seconds) done. [ 38.219482] PM: Entering mem sleep [ 38.221374] Suspending console(s) (use no_console_suspend to debug) [ 38.242858] PM: suspend of devices complete after 12.725 msecs [ 38.248565] PM: late suspend of devices complete after 5.706 msecs [ 38.254699] PM: noirq suspend of devices complete after 6.072 msecs [ 38.254699] Disabling non-boot CPUs ... [ 38.254821] Successfully put all powerdomains to target state [ 38.258575] PM: noirq resume of devices complete after 3.692 msecs [ 38.264007] PM: early resume of devices complete after 4.180 msecs [ 38.337097] PM: resume of devices complete after 72.937 msecs [ 38.368988] PM: Finishing wakeup. [ 38.370788] Restarting tasks ... done. root@beagleboard:~# root@beagleboard:~# root@beagleboard:~# root@beagleboard:~# cat /debug/pm_debug/count usbhost_pwrdm (ON),OFF:0,RET:1578,INA:0,ON:1579,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 core_pwrdm (ON),OFF:0,RET:2,INA:0,ON:3,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0,RET-MEMBANK2-OFF:0 per_pwrdm (ON),OFF:0,RET:2,INA:0,ON:3,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0 dss_pwrdm (ON),OFF:0,RET:1578,INA:0,ON:1579,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 neon_pwrdm (ON),OFF:0,RET:1578,INA:0,ON:1579,RET-LOGIC-OFF:0 mpu_pwrdm (ON),OFF:0,RET:1578,INA:0,ON:1579,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 usbhost_clkdm->usbhost_pwrdm (1) sgx_clkdm->sgx_pwrdm (0) per_clkdm->per_pwrdm (14) cam_clkdm->cam_pwrdm (0) dss_clkdm->dss_pwrdm (1) d2d_clkdm->core_pwrdm (0) iva2_clkdm->iva2_pwrdm (0) mpu_clkdm->mpu_pwrdm (0) core_l4_clkdm->core_pwrdm (27) core_l3_clkdm->core_pwrdm (1) neon_clkdm->neon_pwrdm (0) root@beagleboard:~# root@beagleboard:~# root@beagleboard:~# root@beagleboard:~# ./test_rootfs_access_nonexistent_file__ret_susp -sh: ./test_rootfs_access_nonexistent_file__ret_susp: not found root@beagleboard:~# root@beagleboard:~# %% End retention double suspend/resume UART wakeup test %% Start retention dynamic idle UART wakeup test for u in `ls -1d /sys/bus/platform/drivers/omap_uart/*.seria l | paste -s -d' '`; do echo 3000 > $u/power/autosuspend_delay_ms; done root@beagleboard:~# root@beagleboard:~#