ti.lm36922.yaml

  1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
  2%YAML 1.2
  3---
  4$id: http://devicetree.org/schemas/leds/ti.lm36922.yaml#
  5$schema: http://devicetree.org/meta-schemas/core.yaml#
  6
  7title: Texas Instruments - LM3692x Highly Efficient White LED Driver
  8
  9maintainers:
 10  - Dan Murphy <dmurphy@ti.com>
 11
 12description: |
 13  The LM3692x is an ultra-compact, highly efficient,
 14  white-LED driver designed for LCD display backlighting.
 15
 16  The main difference between the LM36922 and LM36923 is the number of
 17  LED strings it supports. The LM36922 supports two strings while the LM36923
 18  supports three strings.
 19
 20  For more product information please see the link below:
 21  https://www.ti.com/lit/ds/snvsa29/snvsa29.pdf
 22
 23properties:
 24  compatible:
 25    enum:
 26      - ti,lm36922
 27      - ti,lm36923
 28
 29  reg:
 30    maxItems: 1
 31
 32  "#address-cells":
 33    const: 1
 34
 35  "#size-cells":
 36    const: 0
 37
 38  enable-gpios:
 39    description: gpio pin to enable/disable the device.
 40
 41  vled-supply:
 42    description: LED supply
 43
 44  ti,ovp-microvolt:
 45    description: Overvoltage protection.
 46    default: 29000000
 47    enum: [17000000, 21000000, 25000000, 29000000]
 48
 49patternProperties:
 50  '^led@[0-3]$':
 51    type: object
 52    $ref: common.yaml
 53    properties:
 54      reg:
 55        enum: [0, 1, 2, 3]
 56        description: |
 57          0 - Will enable all LED sync paths
 58          1 - Will enable the LED1 sync
 59          2 - Will enable the LED2 sync
 60          3 - Will enable the LED3 sync (LM36923 only)
 61
 62    unevaluatedProperties: false
 63
 64required:
 65  - compatible
 66  - reg
 67  - "#address-cells"
 68  - "#size-cells"
 69
 70allOf:
 71  - if:
 72      properties:
 73        compatible:
 74          contains:
 75            const: ti,lm36922
 76    then:
 77      properties:
 78        led@3: false
 79
 80additionalProperties: false
 81
 82examples:
 83  - |
 84    #include <dt-bindings/gpio/gpio.h>
 85    #include <dt-bindings/leds/common.h>
 86
 87    i2c {
 88        #address-cells = <1>;
 89        #size-cells = <0>;
 90
 91        led-controller@36 {
 92            compatible = "ti,lm36922";
 93            reg = <0x36>;
 94            #address-cells = <1>;
 95            #size-cells = <0>;
 96
 97            enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;
 98            vled-supply = <&vbatt>;
 99            ti,ovp-microvolt = <29000000>;
100
101            led@0 {
102                reg = <0>;
103                function = LED_FUNCTION_BACKLIGHT;
104                color = <LED_COLOR_ID_WHITE>;
105                linux,default-trigger = "backlight";
106                led-max-microamp = <20000>;
107            };
108        };
109    };
110