þ怘€æ€˜€`3f<€fÀæøÀ̆ž?`??f?æžf<øž`??ð3ž<3ž<` 3000 mV at 3000 mV [ 1.350799] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled [ 1.365356] omap_uart 4806a000.serial: no wakeirq for uart0 [ 1.366394] 4806a000.serial: ttyO0 at MMIO 0x4806a000 (irq = 88, base_baud = 3000000) is a OMAP UART0 [ 1.372131] omap_uart 4806c000.serial: no wakeirq for uart0 [ 1.372680] 4806c000.serial: ttyO1 at MMIO 0x4806c000 (irq = 89, base_baud = 3000000) is a OMAP UART1 [ 1.375915] omap_uart 49020000.serial: no wakeirq for uart0 [ 1.376434] 49020000.serial: ttyO2 at MMIO 0x49020000 (irq = 90, base_baud = 3000000) is a OMAP UART2 [ 1.779418] console [ttyO2] enabled [ 1.836273] brd: module loaded [ 1.869781] loop: module loaded [ 1.892944] twl 0-0048: PIH (irq 23) chaining IRQs 306..314 [ 1.896728] twl 0-0048: power (irq 311) chaining IRQs 314..321 [ 1.912048] VAUX1: at 3000 mV [ 1.921936] vdd_ehci: 1800 mV [ 1.929290] VAUX3: at 2800 mV [ 1.936248] VAUX4: at 2800 mV [ 1.943023] VDD1: 600 <--> 1450 mV at 1200 mV [ 1.951232] VDAC: 1800 mV [ 1.961395] VIO: at 1800 mV [ 1.969238] VINTANA1: 1500 mV [ 1.976989] VINTANA2: at 2750 mV [ 1.985961] VINTDIG: 1500 mV [ 1.991790] VMMC1: 1850 <--> 3150 mV at 3000 mV [ 1.999816] VMMC2: 1850 <--> 3150 mV at 2600 mV [ 2.006713] VUSB1V5: 1500 mV [ 2.011535] VUSB1V8: 1800 mV [ 2.015930] VUSB3V1: 3100 mV [ 2.024108] VPLL1: at 1800 mV [ 2.033111] VPLL2: 1800 mV [ 2.039764] VSIM: 1800 <--> 3000 mV at 1800 mV [ 2.046112] twl4030_gpio twl4030-gpio: gpio (irq 306) chaining IRQs 322..339 [ 2.068359] mtdoops: mtd device (mtddev=name/number) must be supplied [ 2.089721] usbcore: registered new interface driver asix [ 2.092987] usbcore: registered new interface driver ax88179_178a [ 2.096618] usbcore: registered new interface driver cdc_ether [ 2.100280] usbcore: registered new interface driver smsc95xx [ 2.103698] usbcore: registered new interface driver net1080 [ 2.107147] usbcore: registered new interface driver cdc_subset [ 2.110717] usbcore: registered new interface driver zaurus [ 2.114227] usbcore: registered new interface driver cdc_ncm [ 2.121215] usbcore: registered new interface driver cdc_wdm [ 2.124694] usbcore: registered new interface driver usb-storage [ 2.128601] usbcore: registered new interface driver usbtest [ 2.139892] mousedev: PS/2 mouse device common for all mice [ 2.144744] twl4030_keypad 48070000.i2c:twl@48:keypad: OF: linux,keymap property not defined in /ocp/i2c@48070000/twl@48/keypad [ 2.151123] twl4030_keypad 48070000.i2c:twl@48:keypad: Failed to build keymap [ 2.155151] twl4030_keypad: probe of 48070000.i2c:twl@48:keypad failed with error -2 [ 2.166503] input: twl4030_pwrbutton as /devices/68000000.ocp/48070000.i2c/i2c-0/0-0048/48070000.i2c:twl@48:pwrbutton/input/input1 [ 2.183776] twl_rtc 48070000.i2c:twl@48:rtc: Power up reset detected. [ 2.188995] twl_rtc 48070000.i2c:twl@48:rtc: Enabling TWL-RTC [ 2.204101] twl_rtc 48070000.i2c:twl@48:rtc: rtc core: registered 48070000.i2c:twl@48 as rtc0 [ 2.212402] i2c /dev entries driver [ 2.220275] Driver for 1-wire Dallas network protocol. [ 2.232421] omap_wdt: OMAP Watchdog Timer Rev 0x31: initial timeout 60 sec [ 2.323364] ledtrig-cpu: registered to indicate activity on CPUs [ 2.328063] usbcore: registered new interface driver usbhid [ 2.331115] usbhid: USB HID core driver [ 2.336761] oprofile: using arm/armv7 [ 2.340057] TCP: cubic registered [ 2.341918] Initializing XFRM netlink socket [ 2.344451] NET: Registered protocol family 17 [ 2.347076] NET: Registered protocol family 15 [ 2.350219] Key type dns_resolver registered [ 2.352996] omap2_set_init_voltage: unable to find boot up OPP for vdd_mpu_iva [ 2.356994] omap2_set_init_voltage: unable to set vdd_mpu_iva [ 2.360229] omap2_set_init_voltage: unable to find boot up OPP for vdd_core [ 2.364044] omap2_set_init_voltage: unable to set vdd_core [ 2.370574] PM: no software I/O chain control; some wakeups may be lost [ 2.377502] ThumbEE CPU extension supported. [ 2.379943] Registering SWP/SWPB emulation handler [ 2.382568] SmartReflex Class3 initialized [ 2.412536] hsusb2_vbus: 3300 mV [ 2.422851] input: gpio_keys as /devices/gpio_keys/input/input2 [ 2.435119] twl_rtc 48070000.i2c:twl@48:rtc: setting system clock to 2000-01-01 00:00:00 UTC (946684800) [ 2.440429] sr_init: No PMIC hook to init smartreflex [ 2.444000] smartreflex smartreflex.0: omap_sr_probe: SmartReflex driver initialized [ 2.448760] smartreflex smartreflex.0: omap_sr_probe: smartreflex_mpu_iva: No Voltage table for the corresponding vdd. Cannot create debugfs entries for n-values [ 2.457611] smartreflex: probe of smartreflex.0 failed with error -61 [ 2.461425] smartreflex smartreflex.1: omap_sr_probe: SmartReflex driver initialized [ 2.465942] smartreflex smartreflex.1: omap_sr_probe: smartreflex_core: No Voltage table for the corresponding vdd. Cannot create debugfs entries for n-values [ 2.474121] smartreflex: probe of smartreflex.1 failed with error -61 [ 2.477996] sr_init: platform driver register failed for SR [ 2.578460] hsusb2_vbus: disabling [ 2.583801] VUSB3V1: disabling [ 2.589324] VUSB1V8: disabling [ 2.594268] VUSB1V5: disabling [ 2.598968] mmc0: host does not support reading read-only switch. assuming write-enable. [ 2.604614] VDAC: disabling [ 2.607635] VAUX3: disabling [ 2.609802] mmc0: new SD card at address 8001 [ 2.623138] mmcblk0: mmc0:8001 SD02G 1.89 GiB [ 2.636657] mmcblk0: p1 p2 [ 3.952178] kjournald starting. Commit interval 5 seconds [ 3.955749] EXT3-fs (mmcblk0p2): warning: maximal mount count reached, running e2fsck is recommended [ 4.143554] EXT3-fs (mmcblk0p2): using internal journal [ 4.151824] EXT3-fs (mmcblk0p2): recovery complete [ 4.154449] EXT3-fs (mmcblk0p2): mounted filesystem with ordered data mode [ 4.158477] VFS: Mounted root (ext3 filesystem) on device 179:2. [ 4.168365] devtmpfs: mounted [ 4.171600] Freeing unused kernel memory: 404K (c07c4000 - c0829000) INIT: version 2.86 booting Starting the hotplug events dispatcher udevd [ 5.479034] udevd (858): /proc/858/oom_adj is deprecated, please use /proc/858/oom_score_adj instead. Synthesizing the initial hotplug events [ 13.107818] random: nonblocking pool is initialized [ 18.165954] 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-rc2-91895-gf7f7a29: No such file or directory FATAL: Could not open /lib/modules/3.17.0-rc2-91895-gf7f7a29/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-rc2-91895-gf7f7a29/modules.dep: No such file or directory modprobe: FATAL: Could not load /lib/modules/3.17.0-rc2-91895-gf7f7a29/modules.dep: No such file or directory ifconfig: SIOCGIFFLAGS: No such device modprobe: FATAL: Could not load /lib/modules/3.17.0-rc2-91895-gf7f7a29/modules.dep: No such file or directory modprobe: FATAL: Could not load /lib/modules/3.17.0-rc2-91895-gf7f7a29/modules.dep: No such file or directory modprobe: FATAL: Could not load /lib/modules/3.17.0-rc2-91895-gf7f7a29/modules.dep: No such file or directory modprobe: FATAL: Could not load /lib/modules/3.17.0-rc2-91895-gf7f7a29/modules.dep: No such file or directory eth0 No such device modprobe: FATAL: Could not load /lib/modules/3.17.0-rc2-91895-gf7f7a29/modules.dep: No such file or directory modprobe: FATAL: Could not load /lib/modules/3.17.0-rc2-91895-gf7f7a29/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-rc2-91895-gf7f7a29/modules.dep: No such file or directory modprobe: FATAL: Could not load /lib/modules/3.17.0-rc2-91895-gf7f7a29/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-rc2-91895-gf7f7a29/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[2214]: 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:1062,INA:0,ON:1063,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:1062,INA:0,ON:1063,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:594,INA:468,ON:1063,RET-LOGIC-OFF:0 mpu_pwrdm (ON),OFF:0,RET:594,INA:468,ON:1063,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 [ 36.348205] PM: Syncing filesystems ... done. [ 36.944091] Freezing user space processes ... (elapsed 0.004 seconds) done. [ 36.952209] Freezing remaining freezable tasks ... (elapsed 0.003 seconds) done. [ 36.959442] Suspending console(s) (use no_console_suspend to debug) [ 37.001464] PM: suspend of devices complete after 30.242 msecs [ 37.011840] PM: late suspend of devices complete after 10.314 msecs [ 37.023620] PM: noirq suspend of devices complete after 11.749 msecs [ 37.023803] Disabling non-boot CPUs ... [ 37.023956] Successfully put all powerdomains to target state [ 37.030548] PM: noirq resume of devices complete after 6.500 msecs [ 37.039184] PM: early resume of devices complete after 7.110 msecs [ 37.210784] PM: resume of devices complete after 171.447 msecs [ 37.245513] Restarting tasks ... done. root@beagleboard:~# root@beagleboard:~# root@beagleboard:~# root@beagleboard:~# cat /debug/pm_debug/count usbhost_pwrdm (ON),OFF:0,RET:1211,INA:0,ON:1212,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:1211,INA:0,ON:1212,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:723,INA:488,ON:1212,RET-LOGIC-OFF:0 mpu_pwrdm (ON),OFF:0,RET:723,INA:488,ON:1212,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 [ 39.240356] PM: Syncing filesystems ... done. [ 39.968780] Freezing user space processes ... (elapsed 0.001 seconds) done. [ 39.974670] Freezing remaining freezable tasks ... (elapsed 0.002 seconds) done. [ 39.981048] Suspending console(s) (use no_console_suspend to debug) [ 40.011108] PM: suspend of devices complete after 18.524 msecs [ 40.021392] PM: late suspend of devices complete after 10.223 msecs [ 40.032379] PM: noirq suspend of devices complete after 10.925 msecs [ 40.032409] Disabling non-boot CPUs ... [ 40.032531] Successfully put all powerdomains to target state [ 40.038879] PM: noirq resume of devices complete after 6.286 msecs [ 40.047424] PM: early resume of devices complete after 7.080 msecs [ 40.219757] PM: resume of devices complete after 172.180 msecs [ 40.253417] Restarting tasks ... done. root@beagleboard:~# root@beagleboard:~# root@beagleboard:~# root@beagleboard:~# cat /debug/pm_debug/count usbhost_pwrdm (ON),OFF:0,RET:1346,INA:0,ON:1347,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:1346,INA:0,ON:1347,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:843,INA:503,ON:1347,RET-LOGIC-OFF:0 mpu_pwrdm (ON),OFF:0,RET:843,INA:503,ON:1347,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:~#