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| -rw-r--r-- | Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml | 129 |
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diff --git a/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml new file mode 100644 index 000000000000..4d61fe0a98a4 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/backlight/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 | $schema: http://devicetree.org/meta-schemas/core.yaml# | ||
| 6 | |||
| 7 | title: TI LM3630A High-Efficiency Dual-String White LED | ||
| 8 | |||
| 9 | maintainers: | ||
| 10 | - Lee Jones <lee.jones@linaro.org> | ||
| 11 | - Daniel Thompson <daniel.thompson@linaro.org> | ||
| 12 | - Jingoo Han <jingoohan1@gmail.com> | ||
| 13 | |||
| 14 | description: | | ||
| 15 | The LM3630A is a current-mode boost converter which supplies the power and | ||
| 16 | controls the current in up to two strings of 10 LEDs per string. | ||
| 17 | https://www.ti.com/product/LM3630A | ||
| 18 | |||
| 19 | properties: | ||
| 20 | compatible: | ||
| 21 | const: ti,lm3630a | ||
| 22 | |||
| 23 | reg: | ||
| 24 | maxItems: 1 | ||
| 25 | |||
| 26 | ti,linear-mapping-mode: | ||
| 27 | description: | | ||
| 28 | Enable linear mapping mode. If disabled, then it will use exponential | ||
| 29 | mapping mode in which the ramp up/down appears to have a more uniform | ||
| 30 | transition to the human eye. | ||
| 31 | type: boolean | ||
| 32 | |||
| 33 | required: | ||
| 34 | - compatible | ||
| 35 | - reg | ||
| 36 | |||
| 37 | patternProperties: | ||
| 38 | "^led@[01]$": | ||
| 39 | type: object | ||
| 40 | description: | | ||
| 41 | Properties for a string of connected LEDs. | ||
| 42 | |||
| 43 | properties: | ||
| 44 | reg: | ||
| 45 | description: | | ||
| 46 | The control bank that is used to program the two current sinks. The | ||
| 47 | LM3630A has two control banks (A and B) and are represented as 0 or 1 | ||
| 48 | in this property. The two current sinks can be controlled | ||
| 49 | independently with both banks, or bank A can be configured to control | ||
| 50 | both sinks with the led-sources property. | ||
| 51 | maxItems: 1 | ||
| 52 | minimum: 0 | ||
| 53 | maximum: 1 | ||
| 54 | |||
| 55 | label: | ||
| 56 | maxItems: 1 | ||
| 57 | |||
| 58 | led-sources: | ||
| 59 | allOf: | ||
| 60 | - minItems: 1 | ||
| 61 | maxItems: 2 | ||
| 62 | items: | ||
| 63 | minimum: 0 | ||
| 64 | maximum: 1 | ||
| 65 | |||
| 66 | default-brightness: | ||
| 67 | description: Default brightness level on boot. | ||
| 68 | minimum: 0 | ||
| 69 | maximum: 255 | ||
| 70 | |||
| 71 | max-brightness: | ||
| 72 | description: Maximum brightness that is allowed during runtime. | ||
| 73 | minimum: 0 | ||
| 74 | maximum: 255 | ||
| 75 | |||
| 76 | required: | ||
| 77 | - reg | ||
| 78 | |||
| 79 | additionalProperties: false | ||
| 80 | |||
| 81 | additionalProperties: false | ||
| 82 | |||
| 83 | examples: | ||
| 84 | - | | ||
| 85 | i2c { | ||
| 86 | #address-cells = <1>; | ||
| 87 | #size-cells = <0>; | ||
| 88 | |||
| 89 | led-controller@38 { | ||
| 90 | compatible = "ti,lm3630a"; | ||
| 91 | reg = <0x38>; | ||
| 92 | |||
| 93 | #address-cells = <1>; | ||
| 94 | #size-cells = <0>; | ||
| 95 | |||
| 96 | led@0 { | ||
| 97 | reg = <0>; | ||
| 98 | led-sources = <0 1>; | ||
| 99 | label = "lcd-backlight"; | ||
| 100 | default-brightness = <200>; | ||
| 101 | max-brightness = <255>; | ||
| 102 | }; | ||
| 103 | }; | ||
| 104 | }; | ||
| 105 | - | | ||
| 106 | i2c { | ||
| 107 | #address-cells = <1>; | ||
| 108 | #size-cells = <0>; | ||
| 109 | |||
| 110 | led-controller@38 { | ||
| 111 | compatible = "ti,lm3630a"; | ||
| 112 | reg = <0x38>; | ||
| 113 | |||
| 114 | #address-cells = <1>; | ||
| 115 | #size-cells = <0>; | ||
| 116 | |||
| 117 | led@0 { | ||
| 118 | reg = <0>; | ||
| 119 | default-brightness = <150>; | ||
| 120 | ti,linear-mapping-mode; | ||
| 121 | }; | ||
| 122 | |||
| 123 | led@1 { | ||
| 124 | reg = <1>; | ||
| 125 | default-brightness = <225>; | ||
| 126 | ti,linear-mapping-mode; | ||
| 127 | }; | ||
| 128 | }; | ||
| 129 | }; | ||
