Add the device tree bindings for backlight controllers attached via Apple
DWI 2-wire interface.
Signed-off-by: Nick Chan <towinchenmi@gmail.com>
---
.../bindings/leds/backlight/apple,dwi-bl.yaml | 54 +++++++++++++++++++
1 file changed, 54 insertions(+)
create mode 100644 Documentation/devicetree/bindings/leds/backlight/apple,dwi-bl.yaml
diff --git a/Documentation/devicetree/bindings/leds/backlight/apple,dwi-bl.yaml b/Documentation/devicetree/bindings/leds/backlight/apple,dwi-bl.yaml
new file mode 100644
index 000000000000..9d4aa243f679
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/apple,dwi-bl.yaml
@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/apple,dwi-bl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Apple DWI 2-Wire Interface Backlight Controller
+
+maintainers:
+ - Nick Chan <towinchenmi@gmail.com>
+
+description: |
+ Apple SoCs contain a 2-wire interface called DWI. On some Apple iPhones,
+ iPads and iPod touches with a LCD display, 1-2 backlight controllers
+ are connected via DWI. Interfacing with DWI controls all backlight
+ controllers at the same time. As such, the backlight controllers are
+ treated as a single controller regardless of the underlying
+ configuration.
+
+properties:
+ compatible:
+ items:
+ - enum:
+ - apple,s5l8960x-dwi-bl
+ - apple,t7000-dwi-bl
+ - apple,s8000-dwi-bl
+ - apple,t8010-dwi-bl
+ - apple,t8015-dwi-bl
+ - const: apple,dwi-bl
+
+ reg:
+ maxItems: 1
+
+ power-domains:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ soc {
+ #address-cells = <2>;
+ #size-cells = <2>;
+
+ dwi_bl: backlight@20e200010 {
+ compatible = "apple,s5l8960x-dwi-bl", "apple,dwi-bl";
+ reg = <0x2 0x0e200010 0 8>;
+ power-domains = <&ps_dwi>;
+ };
+ };
--
2.47.1