any way to evaluate a device's _PS0 method when its power state is at D0?

[aaron lwe <aaron.lwe@gmail.com>]

Hi,

On init, a device's power state is set by acpi_bus_init_power, it got
the information either via power_resources or via _PSC.

My BIOS vendor here did this simply as follows:

Device (xx)
{
        Name (ABPS, 0)

        Method (_PSC, 0, NotSerialized)
        {
                Return (ABPS)
        }
}

So on init, this device's power state will be set to D0 due to ABPS is
0, but its _PS0 never get called.
If later I want to evaluate its _PS0 control method, what should I do?
acpi_bus_set_power will return if it found the set state is the same
with the current state.

Thanks,
Aaron