diff --git a/Documentation/devicetree/bindings/sound/tdm-slot.yaml b/Documentation/devicetree/bindings/sound/tdm-slot.yaml
index ca71e3660f62..457a899e8872 100644
--- a/Documentation/devicetree/bindings/sound/tdm-slot.yaml
+++ b/Documentation/devicetree/bindings/sound/tdm-slot.yaml
@@ -20,6 +20,20 @@ properties:
     $ref: /schemas/types.yaml#/definitions/uint32
     description: Width, in bits, of each slot
 
+  dai-tdm-idle-mode:
+    $ref: /schemas/types.yaml#/definitions/string
+    enum:
+      - none
+      - off
+      - zero
+      - pulldown
+      - hiz
+      - pullup
+      - drivehigh
+    description: Drive mode for inactive/idle TDM slots. For hardware that
+      implements .set_tdm_idle(). Optional. "None" represents undefined
+      behaviour and is the same as not setting this property.
+
 patternProperties:
   '^dai-tdm-slot-[rt]x-mask$':
     $ref: /schemas/types.yaml#/definitions/uint32-array
@@ -30,4 +44,9 @@ patternProperties:
       a mask. The first element of the array is slot 0 (LSB). Any nonzero
       value will be treated as 1.
 
+  '^dai-tdm-slot-[rt]x-idle-mask$':
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Idle slot mask. Optional. A bit being set to 1 indicates
+      that the corresponding TDM slot is inactive/idle.
+
 additionalProperties: true