linux-kernel - Re: [PATCH 2/2] DT: leds: Add Qualcomm Light Pulse Generator binding

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Message-ID: <20170329221327.GA7977@amd>
Date:   Thu, 30 Mar 2017 00:13:27 +0200
From:   Pavel Machek <pavel@....cz>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Richard Purdie <rpurdie@...ys.net>,
        Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-leds@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 2/2] DT: leds: Add Qualcomm Light Pulse Generator binding

Hi!

> +- qcom,pattern:
> +	Usage: optional
> +	Value type: <u16-list>
> +	Definition: list of 16 bit duty cycle values to make up the pattern to
> +		    be programmed into the LUT. Values should be in the range
> +		    [0,512).
> +
> +- qcom,pattern-length-ms:
> +	Usage: optional
> +	Value type: <u32>
> +	Definition: duration, in milliseconds, of the ramp generator running
> +		    one pass over the defined pattern
> +
> +- qcom,pattern-pause-lo-ms:
> +	Usage: optional
> +	Value type: <u32>
> +	Definition: duration, in milliseconds, for the ramp generator to pause
> +		    before iterating over the pattern
> +
> +- qcom,pattern-pause-hi-ms:
> +	Usage: optional
> +	Value type: <u32>
> +	Definition: duration, in milliseconds, for the ramp generator to pause
> +		    after iterating over the pattern
> +
> +- qcom,pattern-ping-pong:
> +	Usage: optional
> +	Value type: <boolean>
> +	Definition: denotes that the ramp generator should reverse direction
> +		    when reaching the end of the pattern, instead of wrapping
> +		    to the beginning
> +
> +- qcom,pattern-oneshot:
> +	Usage: optional
> +	Value type: <boolean>
> +	Definition: denotes that the ramp generator should stop after a single
> +		    pass over the pattern
> +
> +- qcom,pattern-reverse:
> +	Usage: optional
> +	Value type: <boolean>
> +	Definition: denotes that the ramp generator should operate backwards
> +		    over the pattern

I'd not do this. While we _may_ want to specify default trigger and
default blinking behaviour, we should do it in a way that is common
for all the drivers.

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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