I have mpc83xx, and I work with Linux 2.6
I am trying to use power management states.
I succeed to get into D1 state (echo standby > /sys/power/state),
And to waked up by GPIO.
But when I try tried echo mem > /sys/power/state it waked up by reset
(that stuck in the middle)
Or echo disk > /sys/power/state didn't went to sleep at all.
There is a way to get into economic power state (less power then D1
(standby)) and to wake up fast?
On Mon, Aug 13, 2007 at 02:44:50PM +0300, Yoni Levin wrote:
I have mpc83xx, and I work with Linux 2.6
I am trying to use power management states.
I succeed to get into D1 state (echo standby > /sys/power/state),
That's actually closer to D3hot than D1. It uses sleep mode, but does
not power down the core.
And to waked up by GPIO.
But when I try tried echo mem > /sys/power/state it waked up by reset
(that stuck in the middle)
You need u-boot support to resume from deep sleep on 831x. See the code
in the mpc8313erdb board files.
Or echo disk > /sys/power/state didn't went to sleep at all.
There's no support for suspend-to-disk in my patchset.
-Scott