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

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Message-ID: <20160209113204.GC13270@sirena.org.uk>
Date:	Tue, 9 Feb 2016 11:32:04 +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 Tue, Feb 09, 2016 at 01:41:37PM +0800, Chen-Yu Tsai wrote:
> On Tue, Feb 9, 2016 at 12:22 AM, Mark Brown <broonie@...nel.org> wrote:

> > 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.

> OK. So how should one describe a regulator as unused? Just leave it out
> since it's not wired to anything? Or have an empty node at the board
> level? One of the regulators involved on my board is by (hardware)
> default on.

Like I say do it at the board level, you know it's not connected on that
board but another board may use it.

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