linux-kernel - Re: [PATCH 07/11] ARM: dts: sunxi: Add dtsi file for AXP809 PMIC

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Date:	Mon, 8 Feb 2016 16:22:44 +0000
From:	Mark Brown <broonie@...nel.org>
To:	Chen-Yu Tsai <wens@...e.org>
Cc:	Lee Jones <lee.jones@...aro.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	devicetree <devicetree@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-sunxi <linux-sunxi@...glegroups.com>
Subject: Re: [PATCH 07/11] ARM: dts: sunxi: Add dtsi file for AXP809 PMIC

On Mon, Feb 08, 2016 at 10:56:05PM +0800, Chen-Yu Tsai wrote:
> On Mon, Feb 8, 2016 at 10:53 PM, Mark Brown <broonie@...nel.org> wrote:
> > On Sat, Feb 06, 2016 at 08:42:24PM +0800, Chen-Yu Tsai wrote:

> >> Mark, may I assume you are OK with this DTS include listing
> >> the regulators, even if their sections are empty?

> > If it has no content why have it?

> I'd like the regulator core to disable any unused ones. The core
> considers regulators that don't have nodes as not having constraints,
> and won't touch them.

> Any other ways to do this? Or am I going about this the wrong way?

The whole point with constraints is that they describe what is safe on a
given board.  This includes powering off unused regulators - it should
be something that the system integrator configures, not something that
they get as default.

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