Re: PCI device not working

[Kumar Gala <galak@kernel.crashing.org>]

On Sep 21, 2012, at 6:33 AM, Davide Viti wrote:

> Hi,
> I'm working on a custom board based on P1020 with two (identical) PCI =
devices attached;
> The work is derived from another board with a single instance of that =
device.
> The system is based on u-boot-2009.11 and Linux 2.6.34.6
>=20
> The "pci" command on u-boot, shows me both the PCI controllers and
> the attached devices:
>=20
> Scanning PCI devices on bus 0
> BusDevFun  VendorId   DeviceId   Device Class       Sub-Class
> _____________________________________________________________
> 00.00.00   0x1957     0x0100     Processor               0x20
>=20
> Scanning PCI devices on bus 1
> BusDevFun  VendorId   DeviceId   Device Class       Sub-Class
> _____________________________________________________________
> 01.00.00   0x1b65     0xabba     Network controller      0x80
>=20
> Scanning PCI devices on bus 2
> BusDevFun  VendorId   DeviceId   Device Class       Sub-Class
> _____________________________________________________________
> 02.00.00   0x1957     0x0100     Processor               0x20
>=20
> Scanning PCI devices on bus 3
> BusDevFun  VendorId   DeviceId   Device Class       Sub-Class
> _____________________________________________________________
> 03.00.00   0x1b65     0xabba     Network controller      0x80
>=20
> The kernel detects only the first instance of the device.

What do you mean by first instance of the device ?

> Didn't get very far while looking at dts file and kernel logs, so I'm
> asking for some help on narrowing down the problem.
>=20
> I'm wondering if I can assume that the problem is restricted to
> kernel/dts and avoid concentrating on uboot.=20
> I can provide any log (didn't want to post tons of details on the =
first=20
> message)

Probably a dts issue.

What does lspci in linux say?

- k