From mboxrd@z Thu Jan  1 00:00:00 1970
From: marek.vasut@gmail.com (Marek Vasut)
Date: Mon, 9 Jan 2012 00:58:43 +0100
Subject: [PATCH] ARM: PXA: Zipit Z2: Fix oops in z2_power_off
In-Reply-To: <CA+E=qVcJtT9L0kkRT2NAw1Sefeje9vRjqCSLQbm=Z=X4AO+Law@mail.gmail.com>
References: <1326011616-3546-1-git-send-email-anarsoul@gmail.com>
 <201201081140.29275.marek.vasut@gmail.com>
 <CA+E=qVcJtT9L0kkRT2NAw1Sefeje9vRjqCSLQbm=Z=X4AO+Law@mail.gmail.com>
Message-ID: <201201090058.44041.marek.vasut@gmail.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

> 2012/1/8 Marek Vasut <marek.vasut@gmail.com>:
> >> 2012/1/8 Marek Vasut <marek.vasut@gmail.com>:
> >> > That's why I said this patch (suspend the device to make it feel like
> >> > powerdown) is bullshit in the first place.
> >> 
> >> Marek, 'deepsleep' suspend on Z2 is a way to save battery power for
> >> monthes. I blew the dust off my Z2 recently (did not touch it for
> >> ~2monthes), it was in fake poweroff (deepsleep), and battery is still
> >> charged (not full however). I believe it can't be achieved with
> >> 'sleep' suspend.
> > 
> > But you can put the device into this deepsleep-suspend without faking
> > shutdown, right?
> 
> Nope, it does not work. Looks like device disables power on memory in
> deepsleep.

Why?
> 
> >> I agree that it looks weird, but it's hardware bizzarity. Btw, do you
> >> have suggestions how to make it clean?
> > 
> > Yea ... why won't deepsleep suspend work via standard suspend interface?
> 
> Just because it's not possible :)

Why?

> 
> Regards
> Vasily