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Date: Mon, 10 Nov 2008 17:18:16 -0600
From: Scott Wood <scottwood@freescale.com>
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To: wael showair <showair2003@yahoo.com>
Subject: Re: How to add my device node in the device tree
References: <20389723.post@talk.nabble.com>
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wael showair wrote:
> i want to add a node for the DMA in this tree. the PIC PDF tells me that DMA
> channel 0 is connected to Internal interrupt number 4 so i add the following
> node just before the pic node & after the serial node:
> 
> ******************************************
> 
> 		DMA@21100 {
> 			reg = <21100 44>;
> 			interrupts = <4 2>;  
> 			interrupt-parent = <40000>;		
> 		};
> ******************************************

Copy the dma (eloplus) node in one of the existing device trees, rather 
than make up a new binding.  BTW, internal interrupts on the MPIC have 
to have 16 added to the interrupt number.

> but when i called the of_find_node_by_name(NULL, "DMA");
> unfortunately it returns NULL & i cant the a node with such a name.
> i have checked this by printing all of the nodes in my tree which are:
> cpus
> PowerPC,8555
> memory
> soc8555
> i2c
> mdio
> ...
> serial
> pic
> choosen
> choosen
> 
> without a node of name DMA for sure.
> so what else should i do to create this node?
> thanks in advance for your help.

Not sure, are you sure you properly rebuilt the device tree, and are 
using the new blob rather than the old one?

-Scott