linux-kernel - Re: [PATCH 1/2] leds: add DT binding for Qualcomm PM8941 WLED block

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Message-ID: <20141218233652.GD19036@sonymobile.com>
Date:	Thu, 18 Dec 2014 15:36:53 -0800
From:	Bjorn <bjorn@...ymobile.com>
To:	Stephen Boyd <sboyd@...eaurora.org>
CC:	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>,
	Bryan Wu <cooloney@...il.com>,
	Richard Purdie <rpurdie@...ys.net>,
	Grant Likely <grant.likely@...aro.org>,
	"Cavin, Courtney" <Courtney.Cavin@...ymobile.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-leds@...r.kernel.org" <linux-leds@...r.kernel.org>,
	"linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCH 1/2] leds: add DT binding for Qualcomm PM8941 WLED block

On Tue 16 Dec 17:15 PST 2014, Stephen Boyd wrote:

> On 12/08/2014 04:22 PM, Bjorn Andersson wrote:
> 
[..]
> > +- qcom,current-limit: mA; per-string current limit; value from 0 to 25
> > +	default: 20mA
> > +- qcom,current-boost-limit: mA; boost current limit; one of:
> > +	105, 385, 525, 805, 980, 1260, 1400, 1680
> > +	default: 805mA
[..]
> > +- qcom,ovp: V; Over-voltage protection limit; one of:
> > +	27, 29, 32, 35
> > +	default: 29V
> 
> It would be nice if the units were part of the property name, i.e.
> qcom,ovp-V, qcom,current-boost-limit-mA, etc. That way the units are
> known without having to refer to the documentation.
> 

That might be useful, on the other hand one probably need to look inte bindings
docs to figure out valid values anyways.

> > +- qcom,num-strings: #; number of led strings attached; value from 1 to 3
> > +	default: 2
> 
> I wonder if qcom,#strings is more appropriate?
> 

Checking the other docs indicate that it's far more common to use num- than #
here, but I haven't found anything written about it - it's more common to name
this just "qcom,strings" than "qcom,#strings" at least...

Regards,
Bjorn
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