FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/leds/irled/spi-ir-led.txt

     Device tree bindings for IR LED connected through SPI bus which is used as
     remote controller.
     
     The IR LED switch is connected to the MOSI line of the SPI device and the data
     are delivered thourgh that.
     
     Required properties:
             - compatible: should be "ir-spi-led".
     
    Optional properties:
            - duty-cycle: 8 bit value that represents the percentage of one period
              in which the signal is active.  It can be 50, 60, 70, 75, 80 or 90.
            - led-active-low: boolean value that specifies whether the output is
              negated with a NOT gate.
            - power-supply: specifies the power source. It can either be a regulator
              or a gpio which enables a regulator, i.e. a regulator-fixed as
              described in
              Documentation/devicetree/bindings/regulator/fixed-regulator.yaml
    
    Example:
    
            irled@0 {
                    compatible = "ir-spi-led";
                    reg = <0x0>;
                    spi-max-frequency = <5000000>;
                    power-supply = <&vdd_led>;
                    led-active-low;
                    duty-cycle = /bits/ 8 <60>;
            };

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