linux-kernel - Re: [PATCH 6/9] ARM: tegra: Export tegra_powergate_power

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Date:	Wed, 9 Jul 2014 14:20:23 +0300
From:	Peter De Schrijver <pdeschrijver@...dia.com>
To:	Lucas Stach <l.stach@...gutronix.de>
CC:	Thierry Reding <thierry.reding@...il.com>,
	"linux-ide@...r.kernel.org" <linux-ide@...r.kernel.org>,
	Stephen Warren <swarren@...dotorg.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Mikko Perttunen" <mperttunen@...dia.com>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"tj@...nel.org" <tj@...nel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 6/9] ARM: tegra: Export tegra_powergate_power_on

On Wed, Jul 09, 2014 at 12:31:47PM +0200, Lucas Stach wrote:
> > 
> You could also take the easy way out and enable all power domains by
> default. So drivers won't be able to disable the power domain on old
> DTBs where they aren't hooked up, but the will continue to function
> without calling into the old Tegra specific power domain code.
> 

If the bootloader turned some domains off, the kernel would have to turn them
back on again. However that requires knowledge about the clocks and resets of
the peripherals in the domain.

Cheers,

Peter.
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