Re: [PATCH v2 1/2] ARM: dts: add dtsi for palmas

From: Stephen Warren
Date: Mon Jun 10 2013 - 12:35:21 EST

On 06/10/2013 03:04 AM, J Keerthy wrote:
> Adds palmas mfd and palmas regulator nodes.


Well, you're really adding files that provide the nodes, not the nodes

Palmas and MFD should be correctly capitalized.

> diff --git a/arch/arm/boot/dts/palmas.dtsi b/arch/arm/boot/dts/palmas.dtsi

> +&palmas {
> + palmas_pmic {
> + ti,ldo6-vibrator;

Isn't that board-specific? I don't know the HW well enough to say, but I
assume that since there's a property, the whole point must be that some
boards want it set and some don't.

> + regulators {
> + smps123_reg: smps123 {
> + regulator-name = "smps123";
> + };

So the node labels here duplicate those in omap5-uevm.dts in patch 2/2.
While dtc allows this, I don't think there's much point duplicating the
labels. I'd tend to only put the labels in omap5-uevm.dts and not put
them here. That will completely avoid the possibility of the labels in
this file from conflicting with any other labels in any top-level
board.dts file.

I also wonder if this file is actually terribly useful. The only thing
that this file provides is the regulator-name property. It seems simpler
just to put that into each board.dts file. The added advantage of doing
that, is that if a board doesn't use a particular regulator, the node
won't appear, and the regulator won't get registered.
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