[microblaze-uclinux] Initial console problems

[John Williams <jwilliams@xxxxxxxxxxxxxx>]

Hi folks,

A few people have recently reported a problem with the kernel opening 
the console - I've just done a build from fresh CVS kernel + dist, with 
the patch identified on the website:

http://www.itee.uq.edu.au/~jwilliams/mblaze-uclinux/Downloads/_files/microblaze-vendors-20050215.patch

and it's working fine at this end.

However, I think the problem is related to some changes I commited to 
CVS last Friday afternoon, where I shuffled around the handling of the 
consle for microblaze.  You can check the CVS logs for a complete 
description of what it was for, but for the fix I think you want to 
ensure the following:

1. your entire kernel is up to date on CVS, not just the microblaze 
arch.  In particular, there were changes in drivers/char/tty_io.c, that 
you will need for all to work as expected.

2. if you have created a "custom" platform, in 
arch/microblaze/platform/MyPlatform, you need to edit the machine.c file 
in that directory, and remove the following line:

	xmbrs_console_init();

in the function mach_setup()

Since you've created your own platform, the CVS update won't touch your 
new version of machine.c, you must make this change manually.  This is 
illustated nicely in the following CVS diff snapshot:

http://cvs.uclinux.org/cgi-bin/cvsweb.cgi/uClinux-2.4.x/arch/microblaze/platform/uclinux-auto/machine.c.diff?r1=1.6;r2=1.7;f=h

If those who are having difficulties can please try this out, and report 
your experiences here, that would be most helpful.

If this is indeed the problem then please accept my apologies for the 
hassle.  The chance was necessary to bring the microblaze arch into line 
with the rest of the kernel with how it initialises the kernel console 
at startup.

Regards,

John


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