Hi.
I have an Openwrt Linux LEDE 4.4.92 instaled on a router HG-556. Via one usb cp210x device read external serial data to show in a web page.
I used package: kmod-usb-serial-cp210x - 4.4.92-1
Thats work fine but sometimes any goes wrong and device hangs:
dmesg:
[72097.592818] cp210x ttyUSB0: cp210x_open - Unable to enable UART
[72397.600075] cp210x ttyUSB0: cp210x_open - Unable to enable UART
[72697.609946] cp210x ttyUSB0: cp210x_open - Unable to enable UART
[72997.618694] cp210x ttyUSB0: cp210x_open - Unable to enable UART
[73297.624713] cp210x ttyUSB0: cp210x_open - Unable to enable UART
[73597.632589] cp210x ttyUSB0: cp210x_open - Unable to enable UART
[73897.640565] cp210x ttyUSB0: cp210x_open - Unable to enable UART
[74197.644053] cp210x ttyUSB0: cp210x_open - Unable to enable UART
[74497.644559] cp210x ttyUSB0: cp210x_open - Unable to enable UART
[74797.650685] cp210x ttyUSB0: cp210x_open - Unable to enable UART
[75097.649306] cp210x ttyUSB0: cp210x_open - Unable to enable UART
That's easy to detect but I only know one solution: restart entire router.
Is there another solution to restart only UART device?
Thanks for you help.