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Subject[PATCH v10 5/6] dt-bindings: backlight: Add led-backlight binding
Date
Add DT binding for led-backlight.

Cc: devicetree@vger.kernel.org
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>

---

.../leds/backlight/led-backlight.yaml | 55 +++++++++++++++++++
1 file changed, 55 insertions(+)
create mode 100644 Documentation/devicetree/bindings/leds/backlight/led-backlight.yaml

diff --git a/Documentation/devicetree/bindings/leds/backlight/led-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/led-backlight.yaml
new file mode 100644
index 000000000000..47ae3d6b4f31
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/led-backlight.yaml
@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/led-backlight.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: LED-based Backlight Device Tree Bindings
+
+maintainers:
+ - Jean-Jacques Hiblot <jjhiblot@ti.com>
+
+description: |
+ This binding is used to describe a basic backlight device made of LEDs.
+ It can also be used to describe a backlight device controlled by the
+ output of a LED driver.
+
+properties:
+ compatible:
+ const: led-backlight
+
+ leds:
+ $ref: /schemas/types.yaml#/definitions/phandle-array
+ description: List of LEDs constitutive of the backlight.
+
+ default-brightness:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: Default brightness level on boot.
+ minimum: 0
+
+ brightness-levels:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ description: Array of distinct brightness levels. The levels must be in
+ the range accepted by the underlying LED devices. This is used to
+ translate a backlight brightness level into a LED brightness level. If
+ it is not provided, the identity mapping is used.
+
+required:
+ - compatible
+ - backlight-leds
+
+examples:
+ - |
+ backlight {
+ compatible = "led-backlight";
+ backlight-leds = <&led1>;
+ brightness-levels = <0 4 8 16 32 64 128 255>;
+ default-brightness = <6>; /*6th level => brightness of the LEDs is 128*/
+ };
+ - |
+ backlight {
+ compatible = "led-backlight";
+ backlight-leds = <&led1>, <&led2>;
+ default-brightness = <255>;
+ };
+...
--
2.17.1
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