| # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| %YAML 1.2 |
| --- |
| $id: http://devicetree.org/schemas/leds/ti,lm3697.yaml# |
| $schema: http://devicetree.org/meta-schemas/core.yaml# |
| |
| title: TI LM3697 Highly Efficient White LED Driver |
| |
| maintainers: |
| - Dan Murphy <dmurphy@ti.com> |
| |
| description: > |
| The LM3697 11-bit LED driver provides high-performance backlight dimming for |
| 1, 2, or 3 series LED strings while delivering up to 90% efficiency. |
| |
| This device is suitable for display and keypad lighting. |
| |
| properties: |
| compatible: |
| const: ti,lm3697 |
| |
| reg: |
| maxItems: 1 |
| |
| '#address-cells': |
| const: 1 |
| |
| '#size-cells': |
| const: 0 |
| |
| enable-gpios: |
| description: GPIO pin to enable or disable the device. |
| maxItems: 1 |
| |
| vled-supply: |
| description: LED supply for the device. |
| |
| patternProperties: |
| '^led@[01]$': |
| description: LED control bank nodes. |
| $ref: common.yaml# |
| unevaluatedProperties: false |
| |
| properties: |
| reg: |
| description: Control bank selection (0 = bank A, 1 = bank B). |
| maximum: 1 |
| |
| led-sources: |
| description: > |
| HVLED strings associated with this control bank: |
| |
| 0 - HVLED1 |
| 1 - HVLED2 |
| 2 - HVLED3 |
| minItems: 1 |
| maxItems: 3 |
| items: |
| maximum: 2 |
| |
| ti,brightness-resolution: |
| description: Brightness resolution for the LED string. |
| $ref: /schemas/types.yaml#/definitions/uint32 |
| maximum: 2047 |
| |
| ramp-up-us: |
| description: Ramp-up time in microseconds. |
| minimum: 117 |
| maximum: 2048 |
| |
| ramp-down-us: |
| description: Ramp-down time in microseconds. |
| minimum: 117 |
| maximum: 2048 |
| |
| required: |
| - reg |
| - led-sources |
| |
| required: |
| - compatible |
| - reg |
| - '#address-cells' |
| - '#size-cells' |
| |
| additionalProperties: false |
| |
| examples: |
| - | |
| #include <dt-bindings/gpio/gpio.h> |
| |
| i2c { |
| #address-cells = <1>; |
| #size-cells = <0>; |
| |
| led-controller@36 { |
| compatible = "ti,lm3697"; |
| #address-cells = <1>; |
| #size-cells = <0>; |
| reg = <0x36>; |
| |
| enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>; |
| vled-supply = <&vbatt>; |
| |
| led@0 { |
| reg = <0>; |
| led-sources = <0 2>; |
| ti,brightness-resolution = <2047>; |
| ramp-up-us = <500>; |
| ramp-down-us = <1000>; |
| label = "white:first_backlight_cluster"; |
| linux,default-trigger = "backlight"; |
| }; |
| |
| led@1 { |
| reg = <1>; |
| led-sources = <1>; |
| ti,brightness-resolution = <255>; |
| ramp-up-us = <500>; |
| ramp-down-us = <1000>; |
| label = "white:second_backlight_cluster"; |
| linux,default-trigger = "backlight"; |
| }; |
| }; |
| }; |
