topic Re: Compiling USB serial support in i.MX Processors https://community.nxp.com/t5/i-MX-Processors/Compiling-USB-serial-support/m-p/161468#M3457 <HTML><HEAD></HEAD><BODY><P>The problem was mine: I was building the new kernel, but still booting an old kernel via TFTP. The TFTP server was just serving a copy of an older kernel. So I made a softlink from the TFTP server root directory (/tftpboot) to the kernel in the LTIB build directory. Then everything works much better!</P></BODY></HTML> Wed, 13 Jun 2012 23:31:45 GMT CraigMcQueen 2012-06-13T23:31:45Z Compiling USB serial support https://community.nxp.com/t5/i-MX-Processors/Compiling-USB-serial-support/m-p/161467#M3456 <HTML><HEAD></HEAD><BODY><P>I have built Linux for i.MX28 using the Freescale LTIB, and it runs okay on the board. I'm doing this on Ubuntu 10.10.</P><P>Now, I want to compile in support for a USB host connection to a mobile phone handset, so I can access it via /dev/ttyACM0 or something like that.</P><P>I've tried enabling the appropriate options in the kernel configuration, as in <A href="http://forums.freescale.com/t5/i-MX-Microprocessors/can-t-access-dev-ttyACM0-with-kernel-2-6-31/m-p/69183#M2433" target="_blank">this post</A>. But I am seeing two issues:</P><P>1) The lsusb command doesn't show anything.</P><P>2) If I try to do modprobe usbserial, I get errors:</P><P>[root@freescale /root]# modprobe usbserial<BR />usbserial: disagrees about version of symbol usb_alloc_urb<BR />usbserial: Unknown symbol usb_alloc_urb (err -22)<BR />usbserial: disagrees about version of symbol usb_free_urb<BR />usbserial: Unknown symbol usb_free_urb (err -22)<BR />usbserial: disagrees about version of symbol usb_put_dev<BR />usbserial: Unknown symbol usb_put_dev (err -22)<BR />usbserial: disagrees about version of symbol usb_get_dev<BR />usbserial: Unknown symbol usb_get_dev (err -22)<BR />usbserial: disagrees about version of symbol usb_submit_urb<BR />usbserial: Unknown symbol usb_submit_urb (err -22)<BR />usbserial: disagrees about version of symbol usb_kill_urb<BR />usbserial: Unknown symbol usb_kill_urb (err -22)<BR />modprobe: failed to load module usbserial (/lib/modules/2.6.35.3-571-gcca29a0/kernel/drivers/usb/serial/usbserial.ko): Invalid argument</P><P></P><P>I can't understand what is leading to these errors (I am fairly new to building the Linux kernel, though I've used Linux OS for a while).</P></BODY></HTML> Thu, 17 May 2012 06:55:21 GMT https://community.nxp.com/t5/i-MX-Processors/Compiling-USB-serial-support/m-p/161467#M3456 CraigMcQueen 2012-05-17T06:55:21Z Re: Compiling USB serial support https://community.nxp.com/t5/i-MX-Processors/Compiling-USB-serial-support/m-p/161468#M3457 <HTML><HEAD></HEAD><BODY><P>The problem was mine: I was building the new kernel, but still booting an old kernel via TFTP. The TFTP server was just serving a copy of an older kernel. So I made a softlink from the TFTP server root directory (/tftpboot) to the kernel in the LTIB build directory. Then everything works much better!</P></BODY></HTML> Wed, 13 Jun 2012 23:31:45 GMT https://community.nxp.com/t5/i-MX-Processors/Compiling-USB-serial-support/m-p/161468#M3457 CraigMcQueen 2012-06-13T23:31:45Z