From mboxrd@z Thu Jan  1 00:00:00 1970
From: pdeschrijver@nvidia.com (Peter De Schrijver)
Date: Wed, 9 Jul 2014 15:43:44 +0300
Subject: [PATCH 6/9] ARM: tegra: Export tegra_powergate_power_on
In-Reply-To: <20140709120400.GA3819@ulmo>
References: <20140619080234.GK3407@tbergstrom-lnx.Nvidia.com>
 <53A3096B.1040409@wwwdotorg.org>
 <20140623101441.GU3407@tbergstrom-lnx.Nvidia.com>
 <20140708130501.GC9516@ulmo>
 <20140708141135.GC23218@tbergstrom-lnx.Nvidia.com>
 <20140709063130.GA3170@ulmo>
 <20140709083311.GE23218@tbergstrom-lnx.Nvidia.com>
 <20140709102551.GA19357@ulmo>
 <20140709110816.GF23218@tbergstrom-lnx.Nvidia.com>
 <20140709120400.GA3819@ulmo>
Message-ID: <20140709124344.GK23218@tbergstrom-lnx.Nvidia.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Wed, Jul 09, 2014 at 02:04:02PM +0200, Thierry Reding wrote:
> > For those 2 domains we can find the necessary clocks and resets by parsing
> > the relevant existing DT nodes for PCIe and gr3d. For clocks, this isn't
> > even needed as we can always register some extra clkdev's to get them. There
> > is no equivalent for resets so we have to parse the gr3d and pcie DT nodes,
> > but that's not too bad I think.
> 
> Even if we could really do this, at this point I don't see an advantage.
> All that it would be doing is move to some subsystem that doesn't quite
> match what we need just for the sake of moving to that subsystem. Having
> a Tegra-specific API doesn't sound so bad anymore.
> 

The advantage would be that we can use LP0/SC7 as a cpuidle state. Also system
resume from LP0 can be faster as we potentially don't have to resume all
domains at once.

Cheers,

Peter.