linux-kernel - Re: [PATCH 6/6] ARM: dts: Add tps65090 FETs constraints

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Message-ID: <20140812172552.GU17528@sirena.org.uk>
Date:	Tue, 12 Aug 2014 18:25:52 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
Cc:	Kukjin Kim <kgene.kim@...sung.com>,
	Doug Anderson <dianders@...omium.org>,
	Olof Johansson <olof@...om.net>,
	Yuvaraj Kumar C D <yuvaraj.cd@...il.com>,
	linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/6] ARM: dts: Add tps65090 FETs constraints

On Tue, Aug 12, 2014 at 06:44:28PM +0200, Javier Martinez Canillas wrote:
> The tps65090 PMU data manual [0] has a table that list the
> "Recommended operating conditions" for each regulator. Add
> the information about the FET constraints to its dtsi file.

>  		tps65090_fet1: fet1 {
> +			regulator-min-microvolt = <5000000>;
> +			regulator-max-microvolt = <17000000>;
>  		};

No, this is completely broken and exactly the sort of thing that makes
doing generic device .dtsi a bad idea.  We have absolutely no idea if
these voltage ranges are suitable for use on a given board using the
device, these are the design limits for the device but tell us nothing
about the system they are deployed in.

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