* Texas Instruments - LM3697 Highly Efficient White LED Driver The LM3697 11-bit LED driver provides high- performance backlight dimming for 1, 2, or 3 series LED strings while delivering up to 90% efficiency. This device is suitable for display and keypad lighting Required properties: - compatible: "ti,lm3697" - 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 Required child properties: - reg : 0 - LED is Controlled by bank A 1 - LED is Controlled by bank B - led-sources : Indicates which HVLED string is associated to which control bank. This is a zero based property so HVLED1 = 0, HVLED2 = 1, HVLED3 = 2. Additional information is contained in Documentation/devicetree/bindings/leds/common.txt Optional child properties: - ti,brightness-resolution - see Documentation/devicetree/bindings/mfd/ti-lmu.txt - ramp-up-us: see Documentation/devicetree/bindings/mfd/ti-lmu.txt - ramp-down-us: see Documentation/devicetree/bindings/mfd/ti-lmu.txt - label : see Documentation/devicetree/bindings/leds/common.txt - linux,default-trigger : see Documentation/devicetree/bindings/leds/common.txt Example: HVLED string 1 and 3 are controlled by control bank A and HVLED 2 string is controlled by control bank B. led-controller@36 { compatible = "ti,lm3697"; #address-cells = <1>; #size-cells = <0>; reg = <0x36>; enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>; vled-supply = <&vbatt>; led@0 { reg = <0>; led-sources = <0 2>; ti,brightness-resolution = <2047>; ramp-up-us = <5000>; ramp-down-us = <1000>; label = "white:first_backlight_cluster"; linux,default-trigger = "backlight"; }; led@1 { reg = <1>; led-sources = <1>; ti,brightness-resolution = <255>; ramp-up-us = <500>; ramp-down-us = <1000>; label = "white:second_backlight_cluster"; linux,default-trigger = "backlight"; }; } For more product information please see the link below: http://www.ti.com/lit/ds/symlink/lm3697.pdf