Re: Cannot wake-up from standby with MPC8313

On 01/06/12 22:03, Scott Wood wrote:

On 01/06/2012 07:53 AM, Norbert van Bolhuis wrote:

quoted

On 01/05/12 19:22, Scott Wood wrote:

quoted

On 01/05/2012 09:58 AM, Norbert van Bolhuis wrote:

quoted

thanks for your response.

not setting MSR_POW gives same result.

OK, so you're not getting an interrupt regardless of low-power state.

Check whether the interrupt is getting masked during standby preparation.

Does the interrupt handler run when you're not trying to enter standby?

The GPIO/UART interrupt nor the PMC interrupt are being masked during
standby
preperation.
The GPIO/UART interrupt works fine in "operational" mode.
The PMC interrupt I do not know, is it possible to to get PMC interrupt
without going to standby or deep-sleep ?

The PMC interrupt is mainly of interest when running as a PCI agent, to
be notified when the host changed the desired suspend state in config space.

What changes from operational mode to the test where you omit setting
MSR_POW?

Try dumping SIPNR/SIMSR and GPIER/GPIMR/GPDAT at various points.

I dumped SIPNR/SIMSR and uart IIR/EIR (since console triggers wake-up)
but they do not change just before entering standby (via mpc6xx_enter_standby
which omits setting MSR_POW). uart IRQ is always enabled, unmasked and
not pending.

I tried to log to physical memory to see what's going on whenever the
board fails to wake-up.
(I can examine physical memory after CPU is stuck in sleep, by connecting
 a JTAG debugger, start u-boot and stop after DDR2 SDRAM ctrl is
 re-configured)

It looks like an interupt does occur, but do_IRQ seems to be stuck
in ppc_md.get_irq=ipic_get_irq where it reads SIVCR.

I have no idea why, any more suggestions ?


---
NvBolhuis