dt-bindings: leds: Convert leds-lm3692x to YAML format
Additional changes: - Add ref to common.yaml for child node. - Add I2C node at example. Fix below warning: arch/arm64/boot/dts/freescale/imx8mq-librem5-r2.dtb: /soc@0/bus@30800000/i2c@30a40000/backlight@36: failed to match any schema with compatible: ['ti,lm36922'] Signed-off-by: Frank Li <Frank.Li@nxp.com> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20240821222001.591111-1-Frank.Li@nxp.com Signed-off-by: Lee Jones <lee@kernel.org>
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Frank Li
Lee Jones
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4968f67213
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* Texas Instruments - LM3692x Highly Efficient White LED Driver
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The LM3692x is an ultra-compact, highly efficient,
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white-LED driver designed for LCD display backlighting.
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The main difference between the LM36922 and LM36923 is the number of
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LED strings it supports. The LM36922 supports two strings while the LM36923
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supports three strings.
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Required properties:
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- compatible:
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"ti,lm36922"
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"ti,lm36923"
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- reg : I2C slave address
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- #address-cells : 1
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- #size-cells : 0
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Optional properties:
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- enable-gpios : gpio pin to enable/disable the device.
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- vled-supply : LED supply
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- ti,ovp-microvolt: Overvoltage protection in
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micro-volt, can be 17000000, 21000000, 25000000 or
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29000000. If ti,ovp-microvolt is not specified it
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defaults to 29000000.
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Required child properties:
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- reg : 0 - Will enable all LED sync paths
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1 - Will enable the LED1 sync
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2 - Will enable the LED2 sync
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3 - Will enable the LED3 sync (LM36923 only)
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Optional child properties:
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- function : see Documentation/devicetree/bindings/leds/common.txt
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- color : see Documentation/devicetree/bindings/leds/common.txt
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- label : see Documentation/devicetree/bindings/leds/common.txt (deprecated)
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- linux,default-trigger :
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see Documentation/devicetree/bindings/leds/common.txt
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- led-max-microamp :
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see Documentation/devicetree/bindings/leds/common.txt
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Example:
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#include <dt-bindings/leds/common.h>
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led-controller@36 {
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compatible = "ti,lm3692x";
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reg = <0x36>;
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#address-cells = <1>;
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#size-cells = <0>;
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enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;
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vled-supply = <&vbatt>;
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ti,ovp-microvolt = <29000000>;
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led@0 {
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reg = <0>;
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function = LED_FUNCTION_BACKLIGHT;
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color = <LED_COLOR_ID_WHITE>;
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linux,default-trigger = "backlight";
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led-max-microamp = <20000>;
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};
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}
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For more product information please see the link below:
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https://www.ti.com/lit/ds/snvsa29/snvsa29.pdf
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110
Documentation/devicetree/bindings/leds/ti.lm36922.yaml
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110
Documentation/devicetree/bindings/leds/ti.lm36922.yaml
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/leds/ti.lm36922.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Texas Instruments - LM3692x Highly Efficient White LED Driver
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maintainers:
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- Dan Murphy <dmurphy@ti.com>
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description: |
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The LM3692x is an ultra-compact, highly efficient,
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white-LED driver designed for LCD display backlighting.
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The main difference between the LM36922 and LM36923 is the number of
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LED strings it supports. The LM36922 supports two strings while the LM36923
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supports three strings.
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For more product information please see the link below:
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https://www.ti.com/lit/ds/snvsa29/snvsa29.pdf
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properties:
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compatible:
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enum:
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- ti,lm36922
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- ti,lm36923
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reg:
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maxItems: 1
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"#address-cells":
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const: 1
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"#size-cells":
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const: 0
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enable-gpios:
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description: gpio pin to enable/disable the device.
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vled-supply:
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description: LED supply
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ti,ovp-microvolt:
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description: Overvoltage protection.
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default: 29000000
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enum: [17000000, 21000000, 25000000, 29000000]
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patternProperties:
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'^led@[0-3]$':
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type: object
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$ref: common.yaml
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properties:
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reg:
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enum: [0, 1, 2, 3]
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description: |
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0 - Will enable all LED sync paths
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1 - Will enable the LED1 sync
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2 - Will enable the LED2 sync
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3 - Will enable the LED3 sync (LM36923 only)
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unevaluatedProperties: false
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required:
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- compatible
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- reg
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- "#address-cells"
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- "#size-cells"
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allOf:
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- if:
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properties:
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compatible:
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contains:
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const: ti,lm36922
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then:
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properties:
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led@3: false
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/gpio/gpio.h>
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#include <dt-bindings/leds/common.h>
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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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led-controller@36 {
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compatible = "ti,lm36922";
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reg = <0x36>;
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#address-cells = <1>;
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#size-cells = <0>;
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enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;
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vled-supply = <&vbatt>;
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ti,ovp-microvolt = <29000000>;
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led@0 {
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reg = <0>;
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function = LED_FUNCTION_BACKLIGHT;
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color = <LED_COLOR_ID_WHITE>;
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linux,default-trigger = "backlight";
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led-max-microamp = <20000>;
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};
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};
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};
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