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From: Scott Wood <scottwood@freescale.com>
To: jeff angielski <jeff@theptrgroup.com>
Cc: Linuxppc-dev@ozlabs.org
Subject: Re: cpm2-scc-uart on mpc8265 not working
Date: Tue, 23 Dec 2008 13:01:55 -0600	[thread overview]
Message-ID: <495135A3.9090709@freescale.com> (raw)
In-Reply-To: <1230057813.11655.27.camel@penguin>

jeff angielski wrote:
> I fixed up the DPRAM regions.  
> 
> I also fixed up the muram region which had not been updated for the
> mpc8265 - it still had the old mpc8272 definitions.
> 
> The kernel does not hang anymore but I still don't see anything on the
> serial port.  Using an o'scope I can see data on the line, it is just
> that bit period is about 560uS - way to slow.

U-boot needs to fill in the clock-frequency property in the brg node.

> 				data@0 {
> 					/*
> 					reg = <0x0 0x2000 0x9800 0x800>;
> 					*/
> 					compatible = "fsl,cpm-muram-data";
> 					reg = <0x0 0x6000 0x8000 0x1000 0xb000 0x1000>;

This is not correct -- you should only list the DPRAM regions that are 
usable for arbitrary data.  This is <0 0x4000>, assuming none of that 
has been allocated to microcode.

-Scott

      reply	other threads:[~2008-12-23 19:01 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-12-22 20:21 cpm2-scc-uart on mpc8265 not working jeff angielski
2008-12-22 21:01 ` Scott Wood
2008-12-23 18:43   ` jeff angielski
2008-12-23 19:01     ` Scott Wood [this message]

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