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📁 ..
📄 ams,as3645a.txt(2.44 KB)
📁 backlight
📄 common.txt(38 B)
📄 common.yaml(7.81 KB)
📄 cznic,turris-omnia-leds.yaml(2.17 KB)
📁 irled
📄 leds-aat1290.txt(2.86 KB)
📄 leds-an30259a.txt(1.33 KB)
📄 leds-aw2013.yaml(1.86 KB)
📄 leds-bcm6328.txt(8.25 KB)
📄 leds-bcm6358.txt(2.97 KB)
📄 leds-class-multicolor.yaml(1.22 KB)
📄 leds-cpcap.txt(939 B)
📄 leds-cr0014114.txt(1.37 KB)
📄 leds-el15203000.txt(1.69 KB)
📄 leds-gpio.yaml(2.04 KB)
📄 leds-is31fl319x.txt(1.63 KB)
📄 leds-is31fl32xx.txt(1.14 KB)
📄 leds-ktd2692.txt(1.65 KB)
📄 leds-lm3532.txt(3.59 KB)
📄 leds-lm3601x.txt(1.34 KB)
📄 leds-lm36274.txt(2.18 KB)
📄 leds-lm3692x.txt(1.84 KB)
📄 leds-lm3697.txt(2.03 KB)
📄 leds-lp55xx.txt(4.26 KB)
📄 leds-lp55xx.yaml(5.57 KB)
📄 leds-lp8860.txt(1.26 KB)
📄 leds-lt3593.txt(1.13 KB)
📄 leds-max77650.yaml(1.03 KB)
📄 leds-mt6323.txt(1.62 KB)
📄 leds-netxbig.txt(2.3 KB)
📄 leds-ns2.txt(1.05 KB)
📄 leds-pca9532.txt(1.31 KB)
📄 leds-pca955x.txt(1.88 KB)
📄 leds-pm8058.txt(1.96 KB)
📄 leds-powernv.txt(613 B)
📄 leds-pwm.txt(1.36 KB)
📄 leds-sc27xx-bltc.txt(993 B)
📄 leds-sgm3140.yaml(1.42 KB)
📄 leds-spi-byte.txt(1.25 KB)
📄 leds-tlc591xx.txt(786 B)
📄 leds-trigger-pattern.txt(1.96 KB)
📄 pca963x.txt(1.44 KB)
📄 register-bit-led.txt(2.3 KB)
📄 rohm,bd71828-leds.yaml(1.42 KB)
📄 tca6507.txt(1.01 KB)
📄 trigger-source.yaml(646 B)

Editing: leds-lm36274.txt

* Texas Instruments LM36274 4-Channel LCD Backlight Driver w/Integrated Bias

The LM36274 is an integrated four-channel WLED driver and LCD bias supply.
The backlight boost provides the power to bias four parallel LED strings with
up to 29V total output voltage. The 11-bit LED current is programmable via
the I2C bus and/or controlled via a logic level PWM input from 60 uA to 30 mA.

Parent device properties are documented in
Documentation/devicetree/bindings/mfd/ti-lmu.txt

Regulator properties are documented in
Documentation/devicetree/bindings/regulator/lm363x-regulator.txt

Required backlight properties:
	- compatible:
		"ti,lm36274-backlight"
	- reg : 0
	- #address-cells : 1
	- #size-cells : 0
	- led-sources : Indicates which LED strings will be enabled.
			Values from 0-3, sources is 0 based so strings will be
			source value + 1.

Optional backlight properties:
	- 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.

lm36274@11 {
	compatible = "ti,lm36274";
	#address-cells = <1>;
	#size-cells = <0>;
	reg = <0x11>;

enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;

regulators {
		#address-cells = <1>;
		#size-cells = <0>;
		compatible = "ti,lm363x-regulator";

enable-gpios = <&pioC 0 GPIO_ACTIVE_HIGH>,
			       <&pioC 1 GPIO_ACTIVE_HIGH>;

vboost {
			regulator-name = "lcd_boost";
			regulator-min-microvolt = <4000000>;
			regulator-max-microvolt = <7150000>;
			regulator-always-on;
		};

vpos {
			regulator-name = "lcd_vpos";
			regulator-min-microvolt = <4000000>;
			regulator-max-microvolt = <6500000>;
		};

vneg {
			regulator-name = "lcd_vneg";
			regulator-min-microvolt = <4000000>;
			regulator-max-microvolt = <6500000>;
		};
	};

backlight {
		#address-cells = <1>;
		#size-cells = <0>;
		compatible = "ti,lm36274-backlight";

led@0 {
			reg = <0>;
			led-sources = <0 2>;
			label = "white:backlight_cluster";
			linux,default-trigger = "backlight";
		};
	};
};

For more product information please see the link below:
https://www.ti.com/lit/ds/symlink/lm36274.pdf

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