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List:       linux-arm-kernel
Subject:    Disabling a USB port
From:       Benjamin Sapp <bsapp () lanl ! gov>
Date:       2007-05-31 15:19:14
Message-ID: 6.2.0.14.2.20070531090518.056c6a98 () nis-mail ! lanl ! gov
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Hi,

Does any one know how to simply disable a USB port so it is completely 
ignored?  Or maybe we could just never initialize it but I have not yet 
figured out how to do that yet either.

We have a custom board with an i.MX21 processor.  The USB hardware is 
almost identical to the MX21ADS board.  We've tested it and it work 
fine.  The problem is that we are using the USBOTG port and not the USBH1 
or USBH2 hardware ports.  In fact I put the touchscreen on the CSPI2 which 
has lines multiplexed with the USBH2 hardware.  So, I have two modules 
trying to mess with the same lines... as you can imagine it causes some 
problems.  We are using the 2.4.20-celf kernel provided by metrowerks with 
some minor modifications.

By the way the touchscreen works fine if there is no USB installed.

Thanks for any thoughts,
Ben.


Ben Sapp
Los Alamos National Laboratory
P.O. Box  1663, MS B-228
Los Alamos, NM 87545
Phone: (505) 667-8004
FAX: (505) 665 9849  



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