linux-kernel - Re: [PATCH v2 3/3] DT: leds: Add Qualcomm Light Pulse Generator binding

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Date:   Sat, 15 Jul 2017 11:14:39 +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-kernel@...r.kernel.org, linux-leds@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        Fenglin Wu <fenglinw@...eaurora.org>
Subject: Re: [PATCH v2 3/3] DT: leds: Add Qualcomm Light Pulse Generator
 binding

Hi!

> This adds the binding document describing the three hardware blocks
> related to the Light Pulse Generator found in a wide range of Qualcomm
> PMICs.
> 
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> ---
> 
> Changes since v1:
> - Dropped custom pattern properties
> - Renamed cell-index to qcom,lpg-channel to clarify its purpose
> 
>  .../devicetree/bindings/leds/leds-qcom-lpg.txt     | 145 +++++++++++++++++++++
>  1 file changed, 145 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/leds/leds-qcom-lpg.txt
> 
> diff --git a/Documentation/devicetree/bindings/leds/leds-qcom-lpg.txt b/Documentation/devicetree/bindings/leds/leds-qcom-lpg.txt
> new file mode 100644
> index 000000000000..cc9ffee6586b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/leds/leds-qcom-lpg.txt
> @@ -0,0 +1,145 @@
> +Binding for Qualcomm Light Pulse Generator
> +

Can we use similar format to other files in the directory?

> +The Qualcomm Light Pulse Generator consists of three different hardware blocks;
> +a ramp generator with lookup table, the light pulse generator and a three
> +channel current sink. These blocks are found in a wide range of Qualcomm PMICs.
> +Each of these are described individually below.
> +
> += Lookup Table (LUT)
> +
> +- compatible:
> +	Usage: required
> +	Value type: <stringlist>
> +	Definition: must be "qcom,spmi-lpg-lut"

I guess we don't need to know type of the compatible atribute, other
files say

Required properties:

- compatible : Must be "skyworks,aat1290".
- flen-gpios : Must be device tree identifier of the flash device
...

which is easier to understand.

Best regards,
									Pavel

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

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