DTS question - MPC5200b
David Gibson
david at gibson.dropbear.id.au
Wed Feb 13 09:49:06 EST 2008
On Tue, Feb 12, 2008 at 12:37:07PM -0500, Nick wrote:
> Hi,
>
> I need some help. I am trying to access timer 7 on the MPC5200B
> processor. I have the DTS file setup like this
Others have addressed the most salient points, but some general
corrections for your device tree..
> gpt at 670 { // General Purpose Timer
> device_type = "gpt";
device_type shouldn't be here.
> compatible = "fsl,mpc5200b-gpt","fsl,mpc5200-gpt";
> cell-index = <7>;
You probably don't want cell-index. cell-index should *only* be used
when there is some global register somewhere that's indexed by the
cell number.
> reg = <670 10>;
> interrupts = <1 10 0>;
> interrupt-parent = <&mpc5200_pic>;
> };
>
> I have timers 0 to 6 defined the same way except the cell-index reflects
> the timer number.
Presumably 'reg' is different for each, as well.
> In my platform file where I am doing my board setup, I tried the following.
>
> timer7 = mpc52xx_find_and_map ("mpc5200b-gpt");
>
> How do I specify the timer based on the cell-index?
You don't. As Grant explains, use reg instead.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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