Re: problems with pci bus on a pm520 board

11.* is the usb controller

Three OHCIs or is one an EHCI?

However, if I compile the usb driver in and try to
boot. The system stucks somewhere at ohci_init or ohci_run without 
doing
anything till I switch the power off. I attached a bdi to the system 
and
found out that the system always stucks at the instruction lwbrx, which
is called by ohci_readl().

32-bit PCI read I suppose.  Use the BDI to figure out what
address is accessed, and what source code corresponds to
this access.

Seemed that the usb driver failed to acces
some mapped io memory address somehow.

Yeah.

The funny thing is that the e100
driver also does some reading calls on iomem in the initialisation, 
such
as readb() in e100_eeprom_read(). It however doesn't cause system
freezing and the driver quits with an error message that the eeprom is
corrupted. I suppose the problem is somehow still on the pci
configuration in the device tree.

Linux normally is perfectly happy if you leave out all of
the PCI devices from your device tree (except the root
bridges of course).

Hence I suppose the file is still not OK. Anybody could help me with an
idea where I still could look for or give me some detailed information
on the format of device tree?

Sure, post it.

Along with this mail I attached my dts file.

No you didn't.


Segher