linux-kernel - Re: [PATCH 07/10] ARM: OMAP5 / DRA7: Enable CPU RET on suspend

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Message-ID: <20140908183421.GA31730@kahuna>
Date:	Mon, 8 Sep 2014 13:34:21 -0500
From:	Nishanth Menon <nm@...com>
To:	Grazvydas Ignotas <notasas@...il.com>
CC:	Santosh Shilimkar <santosh.shilimkar@...com>,
	Tony Lindgren <tony@...mide.com>,
	Paul Walmsley <paul@...an.com>,
	Kevin Hilman <khilman@...prootsystems.com>,
	Keerthy <j-keerthy@...com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Tero Kristo <t-kristo@...com>,
	Benoît Cousson <bcousson@...libre.com>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 07/10] ARM: OMAP5 / DRA7: Enable CPU RET on suspend

On 20:23-20140908, Grazvydas Ignotas wrote:
> On Sat, Sep 6, 2014 at 12:15 AM, Nishanth Menon <nm@...com> wrote:
> >
> > Hi,
> >
> > Updated patch below:
> > Do let me know if this is ok with folks.
> >
> > ---8<----
> > From 1b9e11834dac2bd75c396aa7495c806b027653fe Mon Sep 17 00:00:00 2001
> > From: Rajendra Nayak <rnayak@...com>
> > Date: Mon, 27 May 2013 15:46:44 +0530
> > Subject: [PATCH V2 7/10] ARM: OMAP5 / DRA7: Enable CPU RET on suspend
> >
> > On OMAP5 / DRA7, prevent a CPU powerdomain OFF and resulting MPU OSWR
> > and instead attempt a CPU RET and side effect, MPU RET in suspend.
> >
> > NOTE: the hardware was originally designed to be capable of achieving
> > deep power states such as OFF and OSWR, however due to various issues
> > and risks, deepest valid state was determined to be CSWR - hence we use
> 
> Would be great to have some more details here..

Sorry, I have no details that can be published publically. Lets say, "TI
refocus"?

> So there is no hope for OFF mode on OMAP5?

Yep, There is *NO* hope for OFF or OSWR on OMAP5/DRA7.

-- 
Regards,
Nishanth Menon
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