Handling power failure - MPC5200

[Jón Benediktsson]

Hi

I am running Linux 2.4.25, based on linux_2_4_devel from Denx, on a custom 
MPC5200 board.
The boad has a TPS3705 chip for reset and watchdog.  The chip also 
provides a powerfail interrupt
when the supply voltage goes below a certain level, which is connected to 
IRQ0 on the MPC5200.

Capacitors on the supply provide me with some milliseconds to repond to 
power failure, which I would
like to use to do as much cleanup as possible before power is totally 
gone.  In particular, I am concerned
with trying to prevent damage to filesystems.  The board has Compact Flash 
and onboard flash which
are used as filesystems.  The board will be used as an industrial 
controller.

Can anyone point me to examples of how this can be handled ?
Can anyone share experience of a similar setup, which filesystems to 
select etc ?

Regards,
Jón Benediktsson
Marel hf
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