On Wed, Oct 17, 2007 at 02:22:04PM +0200, Marian Balakowicz wrote:
> David Gibson wrote:
> > [snip]
> >> + [EMAIL PROTECTED] {
> >> + device_type = "rom";
> >> + compatible = "direct-mapped";
> >> + reg = <0c000000 02000000>;
> >> + probe-type = "CFI";
> >> + bank-width = <2>;
> >> + partitions = <00000000 00060000
> >> + 00060000 00020000
> >> + 00080000 00020000
> >> + 000a0000 00020000
> >> + 000c0000 00200000
> >> + 002c0000 01b40000
> >> + 01e00000 00200000>;
> >> + partition-names =
> >> "uboot\0env\0redund_env\0dtb\0kernel\0rootfs\0config";
> >> + };
> >
> > First, this is the old flash binding, please use the new one.
>
> Ok.
>
> > Second, is the flash really part of the SoC?
>
> Not directly, it is attached to LocalPlus Bus Controller, which is
> part of the SoC. And the soc@ is currently the only recognized of bus
> for mpc5200, so if we want to move it to some other place new bindings
> will need to be defined for lpc (LocalPlus Controller) bus. But I am
> not quite sure where this should be attached. Bus is under LPC which
> is a part of the SoC, but on the other hand Soc address range covers
> only device control registers not the address space LPC may handle
> (that may be varied). Any ideas?
The bus bridge has to be there. Is this something similar to the
"localbus" / "chipselect" bus controllers that a whole bunch of the
Freescale SoCs have? Because the bridged addresses don't lie in the
IMMR, althoug the control registers do, the current convention is to
make the localbus node a sibling of /soc, even though it is really
part of the SoC (/soc would perhaps be better called /immr, but /soc
is established now). This approach is imperfect, but so are most of
the other compromises we could make.
Incidentally LPC is a pretty bad abbreviation, since LPC more
frequently refers to the Low Pin Count connections that frequently
appear on south bridges or superIO chips.
--
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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