Re: Fwd: MPC7410 Linux Kernel

Vineeth wrote:

Thanks for the reply.

We were referring kuroboxHG.dts which uses Sandpoint architecture; which is
almost same as ours.

1. one doubt in kuroboxHG is the ranges property in SOC node says EUMB is at
0xFC00_0000; and as per the datasheet of mpc107, the open pic address will

	
And for powerpc looks u-boot should initialize MPC107 and EUMB_ADDR should be
configured as well. And kernel doesn't reconfigure EUMB again. This is different
from original ppc implementation.

So I think you should check how u-boot did. Note not all targets use 0xfc000000
as EUMB_ADDR. At least for linkstation 0x8000000 is set as EUMB_ADDR. And so
maybe this value, 0xFC000000, should be one typo since kernel don't use this
node property as I previously said.

be EUMB_BASE + 0x40000; but in kurobox its given as 0x80040000;

2. We know that our UART is mapped at address 0xDB00_0100; which is
connected in a PCI-LOCAL bridge whose base is at 0xDB00_0000
How can i represent these things in dts ? Can the RANGES property of PCI
node can mention this ?

How do u-boot resided on your target set EUMB_ADDR? Then you can migrate
kuroboxHG.dts with this base address.

Tiejun

On Tue, Aug 2, 2011 at 1:15 PM, tiejun.chen [off-list ref]wrote:

quoted

Vineeth wrote:

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Hi,

We are trying to port  linux 2.6.38 on MPC7410 based board (This is a
preparatory design by our customer)

System architecture is as follows,

MPC7410 <=> MPC107 <=> PCI_to_LOCAL(plx9052) <=> UART

MPCXXX should be compatible with TSIXXX. So you can refer to mpc7448_hpc2.

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Previously we were using ppc architecture and we had some issues with
page_init() functions; which may be because of our configuration.As we

didnt

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get much support on ppc architecture we moved to powerpc.

Now we moved to powerpc architecture. We have some doubts on writing the

dts

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file. Please find the dts file attached.

when we checked the legacy_serial.c file, we found that
legacy_serial_parents not expecting a pci-local or a pci bridge as

parent.

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is our understanding correct ? should we introduce a new pci parent in

that

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structure ?

So you can understand this after refer to the file,
arch/powerpc/boot/dts/mpc7448hpc2.dts.

Tiejun

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 We are confused about writing the ranges property of PCI node.we were
referring booting_without_of doc but didnt get much info. Is there any

file

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which gives better idea about the ranges property ?

Thanks
 Vineeth