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Date: Mon, 1 Aug 2011 11:12:06 -0500
From: Scott Wood <scottwood@freescale.com>
To: <naresh.kamboju@wipro.com>
Subject: Re: HELP:PowerPc-Linux kernel
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On Mon, 1 Aug 2011 17:01:27 +0530
<naresh.kamboju@wipro.com> wrote:

> >Did you try passing 'console=ttyCPM0' to the bootargs?
> >I have tried ttyCPM0 no use.

Have you tried specifying the baud rate?

> Do I need to modify something on boot loader or is there any boot loader
> can support CPM ?
> 
> Scott,
> Is cpm_console_init() must be initialized to fix this issue?

Please start with the latest kernel.  Upgrade U-Boot as well if you have a
way to recover if the new image doesn't work (e.g. a BDI).

You don't need the bootwrapper for the main serial driver to work.  You may
need some board-specific pin/port init, though at least the serial port
that U-Boot uses should already be set up, assuming it worked in U-Boot
of course. :-)

If it still doesn't work after switching to a current kernel, try dumping
CPM registers, instrumenting the driver, etc. to see what's going on.

-Scott