diff --git a/Documentation/devicetree/bindings/dma/fsl,edma.yaml b/Documentation/devicetree/bindings/dma/fsl,edma.yaml
index fa4248e2f1b9..f609038e35ae 100644
--- a/Documentation/devicetree/bindings/dma/fsl,edma.yaml
+++ b/Documentation/devicetree/bindings/dma/fsl,edma.yaml
@@ -12,6 +12,9 @@ description: |
   DMAMUX0 and DMAMUX1, specific DMA request source can only be multiplexed
   by any channel of certain group, DMAMUX0 or DMAMUX1, but not both.
 
+  This binding has an inverted dma-channel-mask definition compared to
+  the common DMA binding for historical reasons.
+
 maintainers:
   - Peng Fan <peng.fan@nxp.com>
 
@@ -95,6 +98,12 @@ properties:
       eDMA are implemented in big endian mode, otherwise in little mode.
     type: boolean
 
+  dma-channel-mask:
+    description: |
+      Bitmask of available DMA channels (inverted definition).
+      Bit semantics: 0 means channel available, 1 means channel unavailable
+    default: 0
+
 required:
   - "#dma-cells"
   - compatible