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1* Texas Instruments LM36274 4-Channel LCD Backlight Driver w/Integrated Bias2 3The LM36274 is an integrated four-channel WLED driver and LCD bias supply.4The backlight boost provides the power to bias four parallel LED strings with5up to 29V total output voltage. The 11-bit LED current is programmable via6the I2C bus and/or controlled via a logic level PWM input from 60 uA to 30 mA.7 8Parent device properties are documented in9Documentation/devicetree/bindings/mfd/ti-lmu.txt10 11Regulator properties are documented in12Documentation/devicetree/bindings/regulator/lm363x-regulator.txt13 14Required backlight properties:15 - compatible:16 "ti,lm36274-backlight"17 - reg : 018 - #address-cells : 119 - #size-cells : 020 - led-sources : Indicates which LED strings will be enabled.21 Values from 0-3, sources is 0 based so strings will be22 source value + 1.23 24Optional backlight properties:25 - label : see Documentation/devicetree/bindings/leds/common.txt26 - linux,default-trigger :27 see Documentation/devicetree/bindings/leds/common.txt28 29Example:30 31HVLED string 1 and 3 are controlled by control bank A and HVLED 2 string is32controlled by control bank B.33 34lm36274@11 {35 compatible = "ti,lm36274";36 #address-cells = <1>;37 #size-cells = <0>;38 reg = <0x11>;39 40 enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;41 42 regulators {43 #address-cells = <1>;44 #size-cells = <0>;45 compatible = "ti,lm363x-regulator";46 47 enable-gpios = <&pioC 0 GPIO_ACTIVE_HIGH>,48 <&pioC 1 GPIO_ACTIVE_HIGH>;49 50 vboost {51 regulator-name = "lcd_boost";52 regulator-min-microvolt = <4000000>;53 regulator-max-microvolt = <7150000>;54 regulator-always-on;55 };56 57 vpos {58 regulator-name = "lcd_vpos";59 regulator-min-microvolt = <4000000>;60 regulator-max-microvolt = <6500000>;61 };62 63 vneg {64 regulator-name = "lcd_vneg";65 regulator-min-microvolt = <4000000>;66 regulator-max-microvolt = <6500000>;67 };68 };69 70 backlight {71 #address-cells = <1>;72 #size-cells = <0>;73 compatible = "ti,lm36274-backlight";74 75 led@0 {76 reg = <0>;77 led-sources = <0 2>;78 label = "white:backlight_cluster";79 linux,default-trigger = "backlight";80 };81 };82};83 84For more product information please see the link below:85https://www.ti.com/lit/ds/symlink/lm36274.pdf86