[maemo-developers] [maemo-developers] Getting the pl2303 usb serial driver to work with /dev/ttyUSB0

[From: markc at catsandwich.com]

  Nothing shows message wise via dmesg -- which is odd as I see ttyUSB in /proc/devices. And /dev/ttyUSB* shows the same unit #.
  
  BTW -- my PL2303 adapter is powered via a Belkin 4 port hub.  The 770 sees the hub...

  I'm going to try some other devices to see if the hub is the issue.

  Thanks,

  Mark

  /proc # cat devices
Character devices:
  1 mem
  -- various unit #'s deleted
180 usb
188 ttyUSB
216 rfcomm
254 sticon

and...
crw-rw----    1 root     dialout  188,   0 Feb 19 08:44 /dev/ttyUSB0
crw-rw----    1 root     dialout  188,   1 Feb 19 08:44 /dev/ttyUSB1




>-----Original Message-----
>From: Greg KH [mailto:greg at kroah.com]
>Sent: Sunday, February 19, 2006 12:48 PM
>To: markc at catsandwich.com
>Cc: maemo-developers at maemo.org
>Subject: Re: [maemo-developers] Getting the pl2303 usb serial driver to work with /dev/ttyUSB0
>
>On Sun, Feb 19, 2006 at 05:36:36PM +0000, markc at catsandwich.com wrote:
>> Hello,
>> 
>> 
>> I need to get usbserial working so that my application can communicate with a bit of specialized hardware via rs-232 -- using a PL2303 USB to serial adapter.
>> 
>> I've checked the kernel config and see the pl2303 driver is there, and have rebuilt the kernel without the serial console (under the usbserial config).
>> 
>> Flashed the kernel, and used flasher to enable USB host, etc.
>> 
>> MAKEDEV usb builds the device special files, /dev/ttyUSB0, etc.
>> 
>> However I cannot open the device -- "so such device" error.
>
>Does the kernel recognize your device when it is plugged in? It will
>print messages in the kernel log when it does so.
>
>thanks,
>
>greg k-h
>