Bindings/leds/backlight/mps,mp3309c.yaml

   1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/leds/backlight/mps,mp3309c.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: MPS MP3309C backlight
   8
   9 maintainers:
  10   - Flavio Suligoi <f.suligoi@asem.it>
  11
  12 description: |
  13   The Monolithic Power (MPS) MP3309C is a WLED step-up converter, featuring a
  14   programmable switching frequency to optimize efficiency.
  15   It supports two different dimming modes:
  16
  17   - analog mode, via I2C commands (default)
  18   - PWM controlled mode.
  19
  20   The datasheet is available at:
  21   https://www.monolithicpower.com/en/mp3309c.html
  22
  23 allOf:
  24   - $ref: common.yaml#
  25
  26 properties:
  27   compatible:
  28     const: mps,mp3309c
  29
  30   reg:
  31     maxItems: 1
  32
  33   pwms:
  34     description: if present, the backlight is controlled in PWM mode.
  35     maxItems: 1
  36
  37   enable-gpios:
  38     description: GPIO used to enable the backlight in "analog-i2c" dimming mode.
  39     maxItems: 1
  40
  41   mps,overvoltage-protection-microvolt:
  42     description: Overvoltage protection (13.5V, 24V or 35.5V).
  43     enum: [ 13500000, 24000000, 35500000 ]
  44     default: 35500000
  45
  46   mps,no-sync-mode:
  47     description: disable synchronous rectification mode
  48     type: boolean
  49
  50 required:
  51   - compatible
  52   - reg
  53   - max-brightness
  54   - default-brightness
  55
  56 unevaluatedProperties: false
  57
  58 examples:
  59   - |
  60     i2c {
  61         #address-cells = <1>;
  62         #size-cells = <0>;
  63
  64         /* Backlight with PWM control */
  65         backlight_pwm: backlight@17 {
  66             compatible = "mps,mp3309c";
  67             reg = <0x17>;
  68             pwms = <&pwm1 0 3333333 0>; /* 300 Hz --> (1/f) * 1*10^9 */
  69             max-brightness = <100>;
  70             default-brightness = <80>;
  71             mps,overvoltage-protection-microvolt = <24000000>;
  72         };
  73     };