[PATCH 1/5] dt-bindings: mfd: khadas-mcu: add cooling-levels property

[muhammed . efecetin . 67]

From: Muhammed Efe Cetin <efectn@xxxxxxxxxxxxxx>

Add fan controlling step property which is used by Khadas Edge 2.

Signed-off-by: Muhammed Efe Cetin <efectn@xxxxxxxxxxxxxx>
---
 Documentation/devicetree/bindings/mfd/khadas,mcu.yaml | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/mfd/khadas,mcu.yaml b/Documentation/devicetree/bindings/mfd/khadas,mcu.yaml
index 084960fd5..f69643aae 100644
--- a/Documentation/devicetree/bindings/mfd/khadas,mcu.yaml
+++ b/Documentation/devicetree/bindings/mfd/khadas,mcu.yaml
@@ -11,7 +11,7 @@ maintainers:
 
 description: |
   Khadas embeds a microcontroller on their VIM and Edge boards adding some
-  system feature as PWM Fan control (for VIM2 rev14 or VIM3), User memory
+  system feature as PWM Fan control (for VIM2 rev14, VIM3, Edge2), User memory
   storage, IR/Key resume control, system power LED control and more.
 
 properties:
@@ -22,6 +22,13 @@ properties:
   "#cooling-cells": # Only needed for boards having FAN control feature
     const: 2
 
+  cooling-levels:
+    description:
+      Max speed of PWM fan, from 0 to 100. This property is necessary for Khadas Edge 2.
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    items:
+      maximum: 100
+
   reg:
     maxItems: 1
 
-- 
2.49.0