Merge tag 'devicetree-for-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/robh...

[firefly-linux-kernel-4.4.55.git] / Documentation / devicetree / bindings / leds / backlight / pm8941-wled.txt

diff --git a/Documentation/devicetree/bindings/leds/backlight/pm8941-wled.txt b/Documentation/devicetree/bindings/leds/backlight/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:
+- default-brightness: brightness value on boot, value from: 0-4095
+       default: 2048
+- label: The name of the backlight device
+- 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>;
+};