lm3630a-backlight.yaml

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    1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/leds/backlight/lm3630a-backlight.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: TI LM3630A High-Efficiency Dual-String White LED
    8 
    9 maintainers:
   10   - Lee Jones <lee@kernel.org>
   11   - Daniel Thompson <daniel.thompson@linaro.org>
   12   - Jingoo Han <jingoohan1@gmail.com>
   13 
   14 description: |
   15   The LM3630A is a current-mode boost converter which supplies the power and
   16   controls the current in up to two strings of 10 LEDs per string.
   17   https://www.ti.com/product/LM3630A
   18 
   19 properties:
   20   compatible:
   21     const: ti,lm3630a
   22 
   23   reg:
   24     maxItems: 1
   25 
   26   '#address-cells':
   27     const: 1
   28 
   29   '#size-cells':
   30     const: 0
   31 
   32   enable-gpios:
   33     description: GPIO to use to enable/disable the backlight (HWEN pin).
   34     maxItems: 1
   35 
   36 required:
   37   - compatible
   38   - reg
   39   - '#address-cells'
   40   - '#size-cells'
   41 
   42 patternProperties:
   43   "^led@[01]$":
   44     type: object
   45     description: |
   46       Properties for a string of connected LEDs.
   47 
   48     properties:
   49       reg:
   50         description: |
   51           The control bank that is used to program the two current sinks. The
   52           LM3630A has two control banks (A and B) and are represented as 0 or 1
   53           in this property. The two current sinks can be controlled
   54           independently with both banks, or bank A can be configured to control
   55           both sinks with the led-sources property.
   56         minimum: 0
   57         maximum: 1
   58 
   59       label:
   60         maxItems: 1
   61 
   62       led-sources:
   63         allOf:
   64           - minItems: 1
   65             maxItems: 2
   66             items:
   67               minimum: 0
   68               maximum: 1
   69 
   70       default-brightness:
   71         description: Default brightness level on boot.
   72         minimum: 0
   73         maximum: 255
   74 
   75       max-brightness:
   76         description: Maximum brightness that is allowed during runtime.
   77         minimum: 0
   78         maximum: 255
   79 
   80       ti,linear-mapping-mode:
   81         description: |
   82           Enable linear mapping mode. If disabled, then it will use exponential
   83           mapping mode in which the ramp up/down appears to have a more uniform
   84           transition to the human eye.
   85         type: boolean
   86 
   87     required:
   88       - reg
   89 
   90     additionalProperties: false
   91 
   92 additionalProperties: false
   93 
   94 examples:
   95   - |
   96     #include <dt-bindings/gpio/gpio.h>
   97     i2c {
   98         #address-cells = <1>;
   99         #size-cells = <0>;
  100 
  101         led-controller@38 {
  102                 compatible = "ti,lm3630a";
  103                 reg = <0x38>;
  104                 enable-gpios = <&gpio2 5 GPIO_ACTIVE_HIGH>;
  105 
  106                 #address-cells = <1>;
  107                 #size-cells = <0>;
  108 
  109                 led@0 {
  110                         reg = <0>;
  111                         led-sources = <0 1>;
  112                         label = "lcd-backlight";
  113                         default-brightness = <200>;
  114                         max-brightness = <255>;
  115                 };
  116         };
  117     };
  118   - |
  119     i2c {
  120         #address-cells = <1>;
  121         #size-cells = <0>;
  122 
  123         led-controller@38 {
  124                 compatible = "ti,lm3630a";
  125                 reg = <0x38>;
  126 
  127                 #address-cells = <1>;
  128                 #size-cells = <0>;
  129 
  130                 led@0 {
  131                         reg = <0>;
  132                         default-brightness = <150>;
  133                         ti,linear-mapping-mode;
  134                 };
  135 
  136                 led@1 {
  137                         reg = <1>;
  138                         default-brightness = <225>;
  139                         ti,linear-mapping-mode;
  140                 };
  141         };
  142     };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/leds/backlight/lm3630a-backlight.yaml

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/leds/backlight/lm3630a-backlight.yaml