Add new backlight bindings for the TI LM3630A dual-string white LED. Signed-off-by: Brian Masney <masneyb@xxxxxxxxxxxxx> --- .../leds/backlight/lm3630a-backlight.yaml | 112 ++++++++++++++++++ 1 file changed, 112 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml 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..42a8c59d237a --- /dev/null +++ b/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml @@ -0,0 +1,112 @@ +# 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@xxxxxxxxxx> + - Daniel Thompson <daniel.thompson@xxxxxxxxxx> + - Jingoo Han <jingoohan1@xxxxxxxxx> + +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 + + 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 + tranisiton to the human eye. + type: boolean + +required: + - compatible + - reg + +patternProperties: + "^led*$": + type: object + description: | + Properties for a string of connected LEDs. + + properties: + label: + description: | + The label for this LED. If omitted, the label is taken from the node + name (excluding the unit address). It has to uniquely identify a + device, i.e. no other LED class device can be assigned the same label. + + led-sources: + description: | + List of device current outputs the LED is connected to. + allOf: + - $ref: /schemas/types.yaml#/definitions/uint32-array + - 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 level on boot. + minimum: 0 + maximum: 255 + +examples: + - | + i2c { + #address-cells = <1>; + #size-cells = <0>; + + lm3630a_bl@38 { + compatible = "ti,lm3630a"; + status = "ok"; + reg = <0x38>; + + led { + label = "main-lcd"; + led-sources = <0 1>; + default-brightness = <200>; + max-brightness = <255>; + }; + }; + }; + - | + i2c { + #address-cells = <1>; + #size-cells = <0>; + + lm3630a_bl@38 { + compatible = "ti,lm3630a"; + status = "ok"; + reg = <0x38>; + + led-bank-a { + led-sources = <0>; + default-brightness = <150>; + ti,linear-mapping-mode; + }; + + led-bank-b { + led-sources = <1>; + default-brightness = <225>; + ti,linear-mapping-mode; + }; + }; + }; -- 2.20.1
