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d5272d3999
Both files pwm-backlight.yaml and led-backlight.yaml contain properties in common with each other, regarding the brightness levels: - brightness-levels - default-brightness-level These properties can then be moved to backlight/common.yaml. Signed-off-by: Flavio Suligoi <f.suligoi@asem.it> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Reviewed-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20231016150554.27144-1-f.suligoi@asem.it Signed-off-by: Lee Jones <lee@kernel.org>
54 lines
2.1 KiB
YAML
54 lines
2.1 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/leds/backlight/common.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Common backlight properties
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maintainers:
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- Lee Jones <lee@kernel.org>
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- Daniel Thompson <daniel.thompson@linaro.org>
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- Jingoo Han <jingoohan1@gmail.com>
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description:
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Backlight devices provide backlight for different types of graphical
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displays. They are typically but not necessarily implemented using a white
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LED powered by a boost converter.
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properties:
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default-brightness:
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description:
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The default brightness that should be applied to the LED by the operating
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system on start-up. The brightness should not exceed the brightness the
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LED can provide.
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$ref: /schemas/types.yaml#/definitions/uint32
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max-brightness:
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description:
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Normally the maximum brightness is determined by the hardware and this
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property is not required. This property is used to put a software limit
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on the brightness apart from what the driver says, as it could happen
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that a LED can be made so bright that it gets damaged or causes damage
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due to restrictions in a specific system, such as mounting conditions.
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$ref: /schemas/types.yaml#/definitions/uint32
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brightness-levels:
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description:
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Array of distinct brightness levels. The levels must be in the range
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accepted by the underlying LED device. Typically these are in the range
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from 0 to 255, but any range starting at 0 will do, as long as they are
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accepted by the LED.
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The 0 value means a 0% of brightness (darkest/off), while the last value
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in the array represents a full 100% brightness (brightest).
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If this array is not provided, the driver default mapping is used.
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$ref: /schemas/types.yaml#/definitions/uint32-array
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default-brightness-level:
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description:
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The default brightness level (index into the array defined by the
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"brightness-levels" property).
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$ref: /schemas/types.yaml#/definitions/uint32
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additionalProperties: true
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