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Commit cbbd896f authored by Courtney Cavin's avatar Courtney Cavin Committed by Bryan Wu
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leds: add DT binding for Qualcomm PM8941 WLED block 



This adds device tree binding documentation for the WLED ('White' LED)
block on Qualcomm's PM8941 PMICs.

Signed-off-by: default avatarCourtney Cavin <courtney.cavin@sonymobile.com>
Signed-off-by: default avatarBjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: default avatarBryan Wu <cooloney@gmail.com>
parent a44b0f5e

Documentation/devicetree/bindings/leds/leds-pm8941-wled.txt

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Binding for Qualcomm PM8941 WLED driver



Required properties:

- compatible: should be "qcom,pm8941-wled"

- reg: slave address



Optional properties:

- label: The label for this led

  See Documentation/devicetree/bindings/leds/common.txt

- linux,default-trigger: Default trigger assigned to the LED

  See Documentation/devicetree/bindings/leds/common.txt

- qcom,cs-out: bool; enable current sink output

- qcom,cabc: bool; enable content adaptive backlight control

- qcom,ext-gen: bool; use externally generated modulator signal to dim

- 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,switching-freq: kHz; switching frequency; one of:

	600, 640, 685, 738, 800, 872, 960, 1066, 1200, 1371,

	1600, 1920, 2400, 3200, 4800, 9600,

	default: 1600kHz

- qcom,ovp: V; Over-voltage protection limit; one of:

	27, 29, 32, 35

	default: 29V

- qcom,num-strings: #; number of led strings attached; value from 1 to 3

	default: 2



Example:



pm8941-wled@d800 {

	compatible = "qcom,pm8941-wled";

	reg = <0xd800>;

	label = "backlight";



	qcom,cs-out;

	qcom,current-limit = <20>;

	qcom,current-boost-limit = <805>;

	qcom,switching-freq = <1600>;

	qcom,ovp = <29>;

	qcom,num-strings = <2>;

};