Cannot wake-up from standby with MPC8313

Scott Wood scottwood at
Sat Jan 7 08:03:03 EST 2012

On 01/06/2012 07:53 AM, Norbert van Bolhuis wrote:
> On 01/05/12 19:22, Scott Wood wrote:
>> On 01/05/2012 09:58 AM, Norbert van Bolhuis wrote:
>>> 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

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


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