When i disable OTG port as follows , then USB disconnected properly.
But When i Enable OTG port via command line as follows , then kernel crashes.
echo ‘tegra-ehci.0’ > /sys/bus/platform/drivers/tegra-ehci/bind
Kernel crasj log :
509.080190] ------------[ cut here ]------------
[ 1509.083704] WARNING: at /data/sources/PRGCA/1.0.1.A5/PRGCA-1.0.1.A5/src-mep/kernel/linux-avionic-3.10.40/fs/sysfs/dir.c:530 sysfs_add_one+0xa4/0xb4()
[ 1509.097770] sysfs: cannot create duplicate filename ‘/devices/platform/tegra12-i2c.4/i2c-4/4-0040/as3722-regulator.0/regulator/regulator.19/tegra-ehci.0-avdd_pll_utmip’
[ 23.259513] changing wiegand in mode to 0
[ 1509.115796] Modules linked in:
[ 1509.118152] ppp_async option usb_wwan ppp_generic slhc usbserial g_ether libcomposite configfs ecryptfs mep_wiegand ma1000_gpio ov4689_v4l2 mep_tamper ma1000_sdac ma1000_panel_feedback
[ 1509.138072] CPU: 0 PID: 1246 Comm: CmdQueue Not tainted 3.10.40 #2
[ 1509.147269] [] (unwind_backtrace+0x0/0xf4) from [] (show_stack+0x18/0x1c)
[ 1509.158856] [] (show_stack+0x18/0x1c) from [] (warn_slowpath_common+0x5c/0x74)
[ 1509.168270] [] (warn_slowpath_common+0x5c/0x74) from [] (warn_slowpath_fmt+0x38/0x48)
[ 1509.176660] [] (warn_slowpath_fmt+0x38/0x48) from [] (sysfs_add_one+0xa4/0xb4)
[ 1509.184433] [] (sysfs_add_one+0xa4/0xb4) from [] (sysfs_do_create_link_sd+0xe4/0x20c)
[ 1509.192774] [] (sysfs_do_create_link_sd+0xe4/0x20c) from [] (create_regulator+0xbc/0x2a0)
[ 1509.201499] [] (create_regulator+0xbc/0x2a0) from [] (_regulator_get+0x188/0x20c)
[ 1509.209469] [] (_regulator_get+0x188/0x20c) from [] (tegra_usb_phy_open+0x104/0x64c)
[ 1509.217708] [] (tegra_usb_phy_open+0x104/0x64c) from [] (tegra_ehci_probe+0x150/0x9ac)
[ 1509.230255] [] (tegra_ehci_probe+0x150/0x9ac) from [] (driver_probe_device+0x110/0x24c)
[ 1509.242041] [] (driver_probe_device+0x110/0x24c) from [] (driver_bind+0xb4/0x148)
[ 1509.250395] [] (driver_bind+0xb4/0x148) from [] (sysfs_write_file+0x164/0x1c0)
[ 1509.258292] [] (sysfs_write_file+0x164/0x1c0) from [] (vfs_write+0xb8/0x194)
[ 1509.265819] [] (vfs_write+0xb8/0x194) from [] (SyS_write+0x60/0x178)
[ 1509.272654] [] (SyS_write+0x60/0x178) from [] (ret_fast_syscall+0x0/0x30)
[ 1509.279940] —[ end trace 4c0c0ebbbea130ab ]—
[ 1509.283335] +1V8_VDDIO: could not add device link tegra-ehci.0 err -17
[ 1509.288821] +1V8_VDDIO: Failed to create debugfs directory
[ 1509.293191] ------------[ cut here ]------------
[ 1509.296560] WARNING: at …/fs/sysfs/dir.c:530 sysfs_add_one+0xa4/0xb4()
[ 1509.308669] sysfs: cannot create duplicate filename ‘/devices/platform/regulators.4/6.regulator/regulator/regulator.7/tegra-ehci.0-usb_vbus’
[ 1509.320021] Modules linked in: ppp_async option usb_wwan ppp_generic slhc usbserial g_ether libcomposite configfs ecryptfs mep_wiegand ma1000_gpio ov4689_v4l2 mep_tamper ma1000_sdac ma1000_panel_feedback
[ 1509.337002] CPU: 0 PID: 1246 Comm: CmdQueue Tainted: G W 3.10.40 #2
[ 1509.342845] [] (unwind_backtrace+0x0/0xf4) from [] (show_stack+0x18/0x1c)
[ 1509.350062] [] (show_stack+0x18/0x1c) from [] (warn_slowpath_common+0x5c/0x74)
[ 1509.357719] [] (warn_slowpath_common+0x5c/0x74) from [] (warn_slowpath_fmt+0x38/0x48)
[ 1509.366013] [] (warn_slowpath_fmt+0x38/0x48) from [] (sysfs_add_one+0xa4/0xb4)
[ 1509.373675] [] (sysfs_add_one+0xa4/0xb4) from [] (sysfs_do_create_link_sd+0xe4/0x20c)
[ 1509.381933] [] (sysfs_do_create_link_sd+0xe4/0x20c) from [] (create_regulator+0xbc/0x2a0)
[ 1509.390543] [] (create_regulator+0xbc/0x2a0) from [] (_regulator_get+0x188/0x20c)
[ 1509.398484] [] (_regulator_get+0x188/0x20c) from [] (tegra_usb_phy_open+0x454/0x64c)
[ 1509.407460] [] (tegra_usb_phy_open+0x454/0x64c) from [] (tegra_ehci_probe+0x150/0x9ac)
[ 1509.416061] [] (tegra_ehci_probe+0x150/0x9ac) from [] (driver_probe_device+0x110/0x24c)