[PATCH] cpm_uart: Made non-console uart work

Pantelis Antoniou pantelis.antoniou at gmail.com
Sat Sep 10 05:59:37 EST 2005

On Friday 09 September 2005 22:21, Murch, Christopher wrote:
> We've recently applied the 2.6.13 patch.  We're running on an embedded
> platform using 3 of the cpm uart ports on an 8xx cpu.  After applying the
> 2.6.13 patch the non-console uarts no longer work.  Upon investigation, we
> have found that cpu2cpm_addr() is giving us invalid results for memory
> addresses derived from dma_alloc_coherent().  This causes the cpm to hang.
> We believe that the better approach would be to use the dma address
> supplied by the call to dma_alloc_coherent() instead of trying to convert
> using bus_to_virt() and virt_to_bus().  We believe this is the approach
> taken by other drivers in the 2.6 kernel.  Any comments?
> Thanks for your help.

Yes, it would be proper. This is a temporary hack.

What is the IMAP_ADDR value?

And where is the consistent pool located at your board?

> -Chris
> cmurch at mrv.com



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