[RFC] lite5200b low power mode

[Sylvain Munaut]

Domen Puncer wrote:
> Hi!
>
> I have managed to implement low power mode... well, to some
> degree, at least.
>
> Short description:
> patch u-boot, it's the return from wakeup code. pretty clean.
> 	address is saved at 0x0 (0xc000_0000)
> patch linux with PM-platform_bus-and-late_suspend-early_resume.patch
> 	didn't investigate too much, but it seems to broke mine.
> patch linux with lite5200b_low_power.patch
> 	ugly, with debugging, hacks and whatever
>
> Boot Linux and 'echo mem > /sys/power/state'.
> It won't work on PCI, possibly other devices, PSC0 and FEC seem
> to work ok for me.
>
> It seems to work reliably (checksums match, so ram was in self-refresh)
> when called from boot scripts, but not so when from console prompt.
>
>
> If someone's interested (or maybe wants to play with this during
> holiday? ;-) ), more info follow:
>
>   
Well, I'll have a look, that looks interesting ;)


    Sylvain