怘€æ€˜€`3f<€fÀæøÀ̆ž?`??f?æžf<øž`??ð3ž<3ž<` 3000 mV at 3000 mV [ 1.348114] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled [ 1.362609] omap_uart 4806a000.serial: no wakeirq for uart0 [ 1.363647] 4806a000.serial: ttyO0 at MMIO 0x4806a000 (irq = 88, base_baud = 3000000) is a OMAP UART0 [ 1.369110] omap_uart 4806c000.serial: no wakeirq for uart0 [ 1.369659] 4806c000.serial: ttyO1 at MMIO 0x4806c000 (irq = 89, base_baud = 3000000) is a OMAP UART1 [ 1.372894] omap_uart 49020000.serial: no wakeirq for uart0 [ 1.373443] 49020000.serial: ttyO2 at MMIO 0x49020000 (irq = 90, base_baud = 3000000) is a OMAP UART2 [ 1.776672] console [ttyO2] enabled [ 1.833435] brd: module loaded [ 1.867218] loop: module loaded [ 1.890960] twl 0-0048: PIH (irq 23) chaining IRQs 306..314 [ 1.894989] twl 0-0048: power (irq 311) chaining IRQs 314..321 [ 1.910156] VAUX1: at 3000 mV [ 1.920043] vdd_ehci: 1800 mV [ 1.927307] VAUX3: at 2800 mV [ 1.933715] VAUX4: at 2800 mV [ 1.940490] VDD1: 600 <--> 1450 mV at 1200 mV [ 1.948638] VDAC: 1800 mV [ 1.958038] VIO: at 1800 mV [ 1.966217] VINTANA1: 1500 mV [ 1.973907] VINTANA2: at 2750 mV [ 1.982208] VINTDIG: 1500 mV [ 1.989135] VMMC1: 1850 <--> 3150 mV at 3000 mV [ 1.997741] VMMC2: 1850 <--> 3150 mV at 2600 mV [ 2.004669] VUSB1V5: 1500 mV [ 2.009490] VUSB1V8: 1800 mV [ 2.013854] VUSB3V1: 3100 mV [ 2.021942] VPLL1: at 1800 mV [ 2.030975] VPLL2: 1800 mV [ 2.038116] VSIM: 1800 <--> 3000 mV at 1800 mV [ 2.044494] twl4030_gpio twl4030-gpio: gpio (irq 306) chaining IRQs 322..339 [ 2.066772] mtdoops: mtd device (mtddev=name/number) must be supplied [ 2.087921] usbcore: registered new interface driver asix [ 2.091186] usbcore: registered new interface driver ax88179_178a [ 2.094970] usbcore: registered new interface driver cdc_ether [ 2.098541] usbcore: registered new interface driver smsc95xx [ 2.101959] usbcore: registered new interface driver net1080 [ 2.105407] usbcore: registered new interface driver cdc_subset [ 2.108947] usbcore: registered new interface driver zaurus [ 2.112426] usbcore: registered new interface driver cdc_ncm [ 2.118927] usbcore: registered new interface driver cdc_wdm [ 2.122406] usbcore: registered new interface driver usb-storage [ 2.126312] usbcore: registered new interface driver usbtest [ 2.137603] mousedev: PS/2 mouse device common for all mice [ 2.142425] twl4030_keypad 48070000.i2c:twl@48:keypad: OF: linux,keymap property not defined in /ocp/i2c@48070000/twl@48/keypad [ 2.148803] twl4030_keypad 48070000.i2c:twl@48:keypad: Failed to build keymap [ 2.152832] twl4030_keypad: probe of 48070000.i2c:twl@48:keypad failed with error -2 [ 2.164215] input: twl4030_pwrbutton as /devices/68000000.ocp/48070000.i2c/i2c-0/0-0048/48070000.i2c:twl@48:pwrbutton/input/input1 [ 2.181335] twl_rtc 48070000.i2c:twl@48:rtc: Power up reset detected. [ 2.186431] twl_rtc 48070000.i2c:twl@48:rtc: Enabling TWL-RTC [ 2.200897] twl_rtc 48070000.i2c:twl@48:rtc: rtc core: registered 48070000.i2c:twl@48 as rtc0 [ 2.210235] i2c /dev entries driver [ 2.217926] Driver for 1-wire Dallas network protocol. [ 2.230010] omap_wdt: OMAP Watchdog Timer Rev 0x31: initial timeout 60 sec [ 2.315124] ledtrig-cpu: registered to indicate activity on CPUs [ 2.319519] usbcore: registered new interface driver usbhid [ 2.322570] usbhid: USB HID core driver [ 2.328308] oprofile: using arm/armv7 [ 2.331512] TCP: cubic registered [ 2.333343] Initializing XFRM netlink socket [ 2.336029] NET: Registered protocol family 17 [ 2.338592] NET: Registered protocol family 15 [ 2.341644] Key type dns_resolver registered [ 2.344482] omap2_set_init_voltage: unable to find boot up OPP for vdd_mpu_iva [ 2.348541] omap2_set_init_voltage: unable to set vdd_mpu_iva [ 2.351715] omap2_set_init_voltage: unable to find boot up OPP for vdd_core [ 2.355560] omap2_set_init_voltage: unable to set vdd_core [ 2.362030] PM: no software I/O chain control; some wakeups may be lost [ 2.368896] ThumbEE CPU extension supported. [ 2.371337] Registering SWP/SWPB emulation handler [ 2.373962] SmartReflex Class3 initialized [ 2.406799] hsusb2_vbus: 3300 mV [ 2.417022] input: gpio_keys as /devices/gpio_keys/input/input2 [ 2.429107] twl_rtc 48070000.i2c:twl@48:rtc: setting system clock to 2000-01-01 00:00:00 UTC (946684800) [ 2.434295] sr_init: No PMIC hook to init smartreflex [ 2.437957] smartreflex smartreflex.0: omap_sr_probe: SmartReflex driver initialized [ 2.442626] smartreflex smartreflex.0: omap_sr_probe: smartreflex_mpu_iva: No Voltage table for the corresponding vdd. Cannot create debugfs entries for n-values [ 2.451477] smartreflex: probe of smartreflex.0 failed with error -61 [ 2.455352] smartreflex smartreflex.1: omap_sr_probe: SmartReflex driver initialized [ 2.459869] smartreflex smartreflex.1: omap_sr_probe: smartreflex_core: No Voltage table for the corresponding vdd. Cannot create debugfs entries for n-values [ 2.468048] smartreflex: probe of smartreflex.1 failed with error -61 [ 2.471862] sr_init: platform driver register failed for SR [ 2.572174] hsusb2_vbus: disabling [ 2.585632] VUSB3V1: disabling [ 2.587615] mmc0: host does not support reading read-only switch. assuming write-enable. [ 2.594024] VUSB1V8: disabling [ 2.596313] mmc0: new SD card at address 8001 [ 2.604248] VUSB1V5: disabling [ 2.608398] VDAC: disabling [ 2.610198] mmcblk0: mmc0:8001 SD02G 1.89 GiB [ 2.622314] VAUX3: disabling [ 2.631622] mmcblk0: p1 p2 [ 3.947082] kjournald starting. Commit interval 5 seconds [ 3.950653] EXT3-fs (mmcblk0p2): warning: maximal mount count reached, running e2fsck is recommended [ 4.137603] EXT3-fs (mmcblk0p2): using internal journal [ 4.145812] EXT3-fs (mmcblk0p2): recovery complete [ 4.148437] EXT3-fs (mmcblk0p2): mounted filesystem with ordered data mode [ 4.152404] VFS: Mounted root (ext3 filesystem) on device 179:2. [ 4.162261] devtmpfs: mounted [ 4.165679] Freeing unused kernel memory: 404K (c07c4000 - c0829000) INIT: version 2.86 booting Starting the hotplug events dispatcher udevd [ 5.477386] udevd (858): /proc/858/oom_adj is deprecated, please use /proc/858/oom_score_adj instead. Synthesizing the initial hotplug events [ 12.871734] random: nonblocking pool is initialized [ 18.405975] 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/3.17.0-rc2-91893-g52addcf: No such file or directory FATAL: Could not open /lib/modules/3.17.0-rc2-91893-g52addcf/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/3.17.0-rc2-91893-g52addcf/modules.dep: No such file or directory modprobe: FATAL: Could not load /lib/modules/3.17.0-rc2-91893-g52addcf/modules.dep: No such file or directory ifconfig: SIOCGIFFLAGS: No such device modprobe: FATAL: Could not load /lib/modules/3.17.0-rc2-91893-g52addcf/modules.dep: No such file or directory modprobe: FATAL: Could not load /lib/modules/3.17.0-rc2-91893-g52addcf/modules.dep: No such file or directory modprobe: FATAL: Could not load /lib/modules/3.17.0-rc2-91893-g52addcf/modules.dep: No such file or directory modprobe: FATAL: Could not load /lib/modules/3.17.0-rc2-91893-g52addcf/modules.dep: No such file or directory eth0 No such device modprobe: FATAL: Could not load /lib/modules/3.17.0-rc2-91893-g52addcf/modules.dep: No such file or directory modprobe: FATAL: Could not load /lib/modules/3.17.0-rc2-91893-g52addcf/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/3.17.0-rc2-91893-g52addcf/modules.dep: No such file or directory modprobe: FATAL: Could not load /lib/modules/3.17.0-rc2-91893-g52addcf/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/3.17.0-rc2-91893-g52addcf/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[2213]: 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 mount: none already mounted or /debug busy mount: according to mtab, debugfs is already mounted on /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:~# for u in `ls -1d /sys/bus/platform/drivers/omap_uart/*.seria l | paste -s -d' '`; do ls -l $u/power/autosuspend_delay_ms; cat $u/power/autos uspend_delay_ms; done -rw-r--r-- 1 root root 4096 Jul 22 00:18 /sys/bus/platform/drivers/omap_uart/4806a000.serial/power/autosuspend_delay_ms -1 -rw-r--r-- 1 root root 4096 Jul 22 00:18 /sys/bus/platform/drivers/omap_uart/4806c000.serial/power/autosuspend_delay_ms -1 -rw-r--r-- 1 root root 4096 Jul 22 00:18 /sys/bus/platform/drivers/omap_uart/49020000.serial/power/autosuspend_delay_ms -1 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:1100,INA:0,ON:1101,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:1100,INA:0,ON:1101,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:562,INA:538,ON:1101,RET-LOGIC-OFF:0 mpu_pwrdm (ON),OFF:0,RET:562,INA:538,ON:1101,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 (12) 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:~# for u in `ls -1d /sys/class/tty/ttyO* | paste -s -d' '`; do echo enabled > $u/power/wakeup; done root@beagleboard:~# %% Start retention double suspend/resume UART wakeup test root@beagleboard:~# for u in `ls -1d /sys/class/tty/ttyO* | paste -s -d' '`; do echo auto > $u/power/control; done root@beagleboard:~# root@beagleboard:~# for u in `ls -1d /sys/class/tty/ttyO* | paste -s -d' '`; do ls -l $u/power/wakeup; cat $u/power/wakeup; done -rw-r--r-- 1 root root 4096 Jul 22 00:18 /sys/class/tty/ttyO0/power/wakeup enabled -rw-r--r-- 1 root root 4096 Jul 22 00:18 /sys/class/tty/ttyO1/power/wakeup enabled -rw-r--r-- 1 root root 4096 Jul 22 00:18 /sys/class/tty/ttyO2/power/wakeup enabled for u in `ls -1d /sys/class/tty/ttyO* | paste -s -d' '`; do ls -l $u/power/control; cat $u/power/control; done root@beagleboard:~# root@beagleboard:~# for u in `ls -1d /sys/class/tty/ttyO* | paste -s -d' '`; do ls -l $u/power/control; cat $u/power/control; done -rw-r--r-- 1 root root 4096 Jul 22 00:18 /sys/class/tty/ttyO0/power/control auto -rw-r--r-- 1 root root 4096 Jul 22 00:18 /sys/class/tty/ttyO1/power/control auto -rw-r--r-- 1 root root 4096 Jul 22 00:18 /sys/class/tty/ttyO2/power/control echo mem > /sys/power/state auto root@beagleboard:~# root@beagleboard:~# echo mem > /sys/power/state [ 36.365081] PM: Syncing filesystems ... done. [ 37.135955] Freezing user space processes ... (elapsed 0.003 seconds) done. [ 37.143066] Freezing remaining freezable tasks ... (elapsed 0.003 seconds) done. [ 37.150726] Suspending console(s) (use no_console_suspend to debug) [ 37.192749] PM: suspend of devices complete after 30.181 msecs [ 37.203094] PM: late suspend of devices complete after 10.314 msecs [ 37.215026] PM: noirq suspend of devices complete after 11.901 msecs [ 37.215179] Disabling non-boot CPUs ... [ 37.215332] Successfully put all powerdomains to target state [ 37.221771] PM: noirq resume of devices complete after 6.347 msecs [ 37.230377] PM: early resume of devices complete after 7.049 msecs [ 37.408233] PM: resume of devices complete after 177.703 msecs [ 37.442993] Restarting tasks ... done. root@beagleboard:~# root@beagleboard:~# root@beagleboard:~# root@beagleboard:~# cat /debug/pm_debug/count usbhost_pwrdm (ON),OFF:0,RET:1256,INA:0,ON:1257,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:1256,INA:0,ON:1257,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:706,INA:550,ON:1257,RET-LOGIC-OFF:0 mpu_pwrdm (ON),OFF:0,RET:706,INA:550,ON:1257,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 (12) 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 [ 39.431488] PM: Syncing filesystems ... done. [ 40.156738] Freezing user space processes ... (elapsed 0.002 seconds) done. [ 40.163116] Freezing remaining freezable tasks ... (elapsed 0.002 seconds) done. [ 40.169555] Suspending console(s) (use no_console_suspend to debug) [ 40.199401] PM: suspend of devices complete after 18.371 msecs [ 40.209655] PM: late suspend of devices complete after 10.223 msecs [ 40.220611] PM: noirq suspend of devices complete after 10.894 msecs [ 40.220642] Disabling non-boot CPUs ... [ 40.220764] Successfully put all powerdomains to target state [ 40.227111] PM: noirq resume of devices complete after 6.286 msecs [ 40.235656] PM: early resume of devices complete after 7.049 msecs [ 40.407257] PM: resume of devices complete after 171.447 msecs [ 40.440887] Restarting tasks ... done. root@beagleboard:~# root@beagleboard:~# root@beagleboard:~# root@beagleboard:~# cat /debug/pm_debug/count usbhost_pwrdm (ON),OFF:0,RET:1383,INA:0,ON:1384,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:1383,INA:0,ON:1384,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:817,INA:566,ON:1384,RET-LOGIC-OFF:0 mpu_pwrdm (ON),OFF:0,RET:817,INA:566,ON:1384,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 (12) 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:~# for u in `ls -1d /sys/bus/platform/drivers/omap_uart/*.seria l | paste -s -d' '`; do ls -l $u/power/autosuspend_delay_ms; cat $u/power/autos uspend_delay_ms; done -rw-r--r-- 1 root root 4096 Jul 22 00:18 /sys/bus/platform/drivers/omap_uart/4806a000.serial/power/autosuspend_delay_ms 3000 -rw-r--r-- 1 root root 4096 Jul 22 00:18 /sys/bus/platform/drivers/omap_uart/4806c000.serial/power/autosuspend_delay_ms 3000 -rw-r--r-- 1 root root 4096 Jul 22 00:18 /sys/bus/platform/drivers/omap_uart/49020000.serial/power/autosuspend_delay_ms 3000 root@beagleboard:~# root@beagleboard:~#