linux-kernel - Re: [PATCH V1 1/4] qcom: spmi-wled: Add support for qcom wled driver

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Date:   Fri, 15 Dec 2017 21:30:26 +0100
From:   Pavel Machek <pavel@....cz>
To:     Kiran Gunda <kgunda@...eaurora.org>
Cc:     bjorn.andersson@...aro.org, linux-arm-msm@...r.kernel.org,
        Lee Jones <lee.jones@...aro.org>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>,
        Richard Purdie <rpurdie@...ys.net>,
        Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        linux-leds@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-fbdev@...r.kernel.org,
        linux-arm-msm-owner@...r.kernel.org
Subject: Re: [PATCH V1 1/4] qcom: spmi-wled: Add support for qcom wled driver

On Thu 2017-11-16 17:48:34, Kiran Gunda wrote:
> WLED driver provides the interface to the display driver to
> adjust the brightness of the display backlight.
> 
> Signed-off-by: Kiran Gunda <kgunda@...eaurora.org>
> ---
>  .../bindings/leds/backlight/qcom-spmi-wled.txt     |  90 ++++
>  drivers/video/backlight/Kconfig                    |   9 +
>  drivers/video/backlight/Makefile                   |   1 +
>  drivers/video/backlight/qcom-spmi-wled.c           | 504 +++++++++++++++++++++
>  4 files changed, 604 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/leds/backlight/qcom-spmi-wled.txt
>  create mode 100644 drivers/video/backlight/qcom-spmi-wled.c
> 
> diff --git a/Documentation/devicetree/bindings/leds/backlight/qcom-spmi-wled.txt b/Documentation/devicetree/bindings/leds/backlight/qcom-spmi-wled.txt
> new file mode 100644
> index 0000000..f1ea25b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/leds/backlight/qcom-spmi-wled.txt
> @@ -0,0 +1,90 @@
> +Binding for Qualcomm WLED driver
> +
> +WLED (White Light Emitting Diode) driver is used for controlling display
> +backlight that is part of PMIC on Qualcomm Technologies reference platforms.
> +The PMIC is connected to the host processor via SPMI bus.
> +
> +- compatible
> +	Usage:      required
> +	Value type: <string>
> +	Definition: should be "qcom,pm8998-spmi-wled".
> +
> +- reg
> +	Usage:      required
> +	Value type: <prop-encoded-array>
> +	Definition:  Base address and size of the WLED modules.
> +
> +- reg-names
> +	Usage:      required
> +	Value type: <string>
> +	Definition:  Names associated with base addresses. should be
> +		     "qcom-wled-ctrl-base", "qcom-wled-sink-base".
> +
> +- label
> +	Usage:      required
> +	Value type: <string>
> +	Definition: The name of the backlight device.
> +
> +- default-brightness
> +	Usage:      optional
> +	Value type: <u32>
> +	Definition: brightness value on boot, value from: 0-4095
> +		    default: 2048
> +
> +- qcom,fs-current-limit

I'd add "-uA" suffix here.

> +	Usage:      optional
> +	Value type: <u32>
> +	Definition: per-string full scale current limit in uA. value from
> +		    0 to 30000 with 5000 uA resolution. default: 25000 uA
> +
> +- qcom,current-boost-limit

And -mA suffix here. Similar for other units.

Thanks,
								Pavel


-- 
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