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authorLinus Walleij <linus.walleij@linaro.org>2020-08-19 22:51:48 +0200
committerLee Jones <lee.jones@linaro.org>2020-08-28 11:48:00 +0100
commitae1f74da7c5a6bed3b9573a44e66f8ebbadefbbd (patch)
tree0f8295cb1a779482aae6a7fca1dee595c916d3cc /Documentation/devicetree/bindings/leds/backlight
parentb7a4f80bc316a56d6ec8750e93e66f42431ed960 (diff)
dt-bindings: backlight: Add some common backlight properties
Let's use a common.yaml include for the backlight like we do with the LEDs. The LEDs are inherently incompatible so their bindings cannot be reused for backlight. Cc: devicetree@vger.kernel.org Suggested-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'Documentation/devicetree/bindings/leds/backlight')
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diff --git a/Documentation/devicetree/bindings/leds/backlight/common.yaml b/Documentation/devicetree/bindings/leds/backlight/common.yaml
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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/common.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Common backlight properties
+
+maintainers:
+ - Lee Jones <lee.jones@linaro.org>
+ - Daniel Thompson <daniel.thompson@linaro.org>
+ - Jingoo Han <jingoohan1@gmail.com>
+
+description:
+ Backlight devices provide backlight for different types of graphical
+ displays. They are typically but not necessarily implemented using a white
+ LED powered by a boost converter.
+
+properties:
+ default-brightness:
+ description:
+ The default brightness that should be applied to the LED by the operating
+ system on start-up. The brightness should not exceed the brightness the
+ LED can provide.
+ $ref: /schemas/types.yaml#definitions/uint32
+
+ max-brightness:
+ description:
+ Normally the maximum brightness is determined by the hardware and this
+ property is not required. This property is used to put a software limit
+ on the brightness apart from what the driver says, as it could happen
+ that a LED can be made so bright that it gets damaged or causes damage
+ due to restrictions in a specific system, such as mounting conditions.
+ $ref: /schemas/types.yaml#definitions/uint32