Re: Resetting PCI devices

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Hello,

On Wed, Aug 27, 2008 at 12:49 PM, Leon Ljunggren
<leon.ljunggren@xxxxxxxxx> wrote:
> I'm working with a ipdx425 based system (ARM) using the 2.6.20.3
> kernel and I'm having trouble getting system reset to work properly
> (for example when issuing the reboot command). The system is rebooted
> as it should but PCI devices such as the graphic controller isn't
> reseted (it will retain whatever picture it had before the reboot). I
> know that the code for resetting can be found in
> include/asm-arm/arch-ixp4xx/system.h, it uses the built in watchdog
> timer to reset the CPU but it won't reset any other devices.
> Does anyone know how I can cause all PCI devices to be reseted as well?
>
Good question, as the IXP4xx does not have a bi-directional reset pin.
When the CPU is soft-reset (for example by the watchdog) the external
pheripherals (such as FlashROM) may be left in a non-reset state (this
is fatal if the IXP4xx starts from FlashROM).

Maybe ask this on the ARM kernel mailing list?

Regards,
-- 
Leon

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