Re: [PATCH 6/9] ARM: tegra: Export tegra_powergate_power_on

From: Peter De Schrijver
Date: Wed Jul 09 2014 - 08:44:12 EST

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.



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