Kernel-4.18.0-80.el8_pm8941-wle

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>;

};