xref: /openbmc/linux/Documentation/devicetree/bindings/leds/leds-lm3692x.txt (revision c5437338)

* Texas Instruments - LM3692x Highly Efficient White LED Driver

The LM3692x is an ultra-compact, highly efficient,
white-LED driver designed for LCD display backlighting.

The main difference between the LM36922 and LM36923 is the number of
LED strings it supports.  The LM36922 supports two strings while the LM36923
supports three strings.

Required properties:
	- compatible:
		"ti,lm36922"
		"ti,lm36923"
	- reg :  I2C slave address
	- #address-cells : 1
	- #size-cells : 0

Optional properties:
	- enable-gpios : gpio pin to enable/disable the device.
	- vled-supply : LED supply
	- ti,ovp-microvolt: Overvoltage protection in
	    micro-volt, can be 17000000, 21000000, 25000000 or
	    29000000. If ti,ovp-microvolt is not specified it
	    defaults to 29000000.

Required child properties:
	- reg : 0 - Will enable all LED sync paths
		1 - Will enable the LED1 sync
		2 - Will enable the LED2 sync
		3 - Will enable the LED3 sync (LM36923 only)

Optional child properties:
	- function : see Documentation/devicetree/bindings/leds/common.txt
	- color : see Documentation/devicetree/bindings/leds/common.txt
	- label : see Documentation/devicetree/bindings/leds/common.txt (deprecated)
	- linux,default-trigger :
	   see Documentation/devicetree/bindings/leds/common.txt
	- led-max-microamp :
	   see Documentation/devicetree/bindings/leds/common.txt

Example:

#include <dt-bindings/leds/common.h>

led-controller@36 {
	compatible = "ti,lm3692x";
	reg = <0x36>;
	#address-cells = <1>;
	#size-cells = <0>;

	enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;
	vled-supply = <&vbatt>;
	ti,ovp-microvolt = <29000000>;

	led@0 {
		reg = <0>;
		function = LED_FUNCTION_BACKLIGHT;
		color = <LED_COLOR_ID_WHITE>;
		linux,default-trigger = "backlight";
		led-max-microamp = <20000>;
	};
}

For more product information please see the link below:
https://www.ti.com/lit/ds/snvsa29/snvsa29.pdf