[PATCH 5/8] ARM: PXA: Z2: Add poweroff function

[Vasily Khoruzhick]

On Friday 11 March 2011 23:39:03 Marek Vasut wrote:
> On Friday 11 March 2011 11:23:40 Vasily Khoruzhick wrote:
> > Signed-off-by: Vasily Khoruzhick <anarsoul at gmail.com>
> 
> This looks bogus to me as you cannot power down the thing. Besides, where
> do you resume to from this so-called "powerdown" ? Since the bootloader
> will consider it as a legitimate deepsleep resume.

It eats only 0.7mA in deepsleep, but 6.7mA in sleep (PXA2xx has 2 sleep 
modes), so deepsleep is pretty close to poweroff. Bootloader behaves correctly 
(at least u-boot binary I'm using) - it starts boot process after deepsleep. 
Looks like hardware is somehow configured to disable almost everything in 
deepsleep mode, RAM content is not preserved anyway, so we can't resume 
properly.