| # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) |
| %YAML 1.2 |
| --- |
| $id: http://devicetree.org/schemas/leds/backlight/lm3630a-backlight.yaml# |
| $schema: http://devicetree.org/meta-schemas/core.yaml# |
| |
| title: TI LM3630A High-Efficiency Dual-String White LED |
| |
| maintainers: |
| - Lee Jones <lee.jones@linaro.org> |
| - Daniel Thompson <daniel.thompson@linaro.org> |
| - Jingoo Han <jingoohan1@gmail.com> |
| |
| description: | |
| The LM3630A is a current-mode boost converter which supplies the power and |
| controls the current in up to two strings of 10 LEDs per string. |
| https://www.ti.com/product/LM3630A |
| |
| properties: |
| compatible: |
| const: ti,lm3630a |
| |
| reg: |
| maxItems: 1 |
| |
| '#address-cells': |
| const: 1 |
| |
| '#size-cells': |
| const: 0 |
| |
| required: |
| - compatible |
| - reg |
| - '#address-cells' |
| - '#size-cells' |
| |
| patternProperties: |
| "^led@[01]$": |
| type: object |
| description: | |
| Properties for a string of connected LEDs. |
| |
| properties: |
| reg: |
| description: | |
| The control bank that is used to program the two current sinks. The |
| LM3630A has two control banks (A and B) and are represented as 0 or 1 |
| in this property. The two current sinks can be controlled |
| independently with both banks, or bank A can be configured to control |
| both sinks with the led-sources property. |
| minimum: 0 |
| maximum: 1 |
| |
| label: |
| maxItems: 1 |
| |
| led-sources: |
| allOf: |
| - minItems: 1 |
| maxItems: 2 |
| items: |
| minimum: 0 |
| maximum: 1 |
| |
| default-brightness: |
| description: Default brightness level on boot. |
| minimum: 0 |
| maximum: 255 |
| |
| max-brightness: |
| description: Maximum brightness that is allowed during runtime. |
| minimum: 0 |
| maximum: 255 |
| |
| ti,linear-mapping-mode: |
| description: | |
| Enable linear mapping mode. If disabled, then it will use exponential |
| mapping mode in which the ramp up/down appears to have a more uniform |
| transition to the human eye. |
| type: boolean |
| |
| required: |
| - reg |
| |
| additionalProperties: false |
| |
| additionalProperties: false |
| |
| examples: |
| - | |
| i2c { |
| #address-cells = <1>; |
| #size-cells = <0>; |
| |
| led-controller@38 { |
| compatible = "ti,lm3630a"; |
| reg = <0x38>; |
| |
| #address-cells = <1>; |
| #size-cells = <0>; |
| |
| led@0 { |
| reg = <0>; |
| led-sources = <0 1>; |
| label = "lcd-backlight"; |
| default-brightness = <200>; |
| max-brightness = <255>; |
| }; |
| }; |
| }; |
| - | |
| i2c { |
| #address-cells = <1>; |
| #size-cells = <0>; |
| |
| led-controller@38 { |
| compatible = "ti,lm3630a"; |
| reg = <0x38>; |
| |
| #address-cells = <1>; |
| #size-cells = <0>; |
| |
| led@0 { |
| reg = <0>; |
| default-brightness = <150>; |
| ti,linear-mapping-mode; |
| }; |
| |
| led@1 { |
| reg = <1>; |
| default-brightness = <225>; |
| ti,linear-mapping-mode; |
| }; |
| }; |
| }; |
