mpc5200 linux 2.4 wakeup interrupt problem

Hello,

I am running linux on a mpc5200 chip and Im having problems with the mpc5200's simple and wakeup interrupts. The version of Linux I am starting with is linuxppc_2_4_devel_1_0_0 from Denx. Modifications have been made to the kernel, but none for enabling the wakeup register set and/or the wakeup interrupts.

Does a patch exist to enable this behavior? Can anyone point me in the right direction if I would like to enable the wakeup interrupts myself?

I noticed the behavior when attempting to write a device driver to interface with the psc1_4 pin on the mpc5200 chip. I am able to get the chip to generate interrupts, but when the interrupts occur I get the following error message in /proc/kmsg "Unhandled interrupt c, disabled". After getting this error, I installed an interrupt handler on IRQ 12 (hex c). This caused the kernel to lock up.

Thanks for any help,
-Ron

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Maybe you forgot to acknowledge the IRQ (and so it always reenters your handler). For gpio wakeup interrupts see wkup_istat (MBAR+0xc24).

HTH

Domen