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-rw-r--r--Documentation/devicetree/bindings/ata/ahci-platform.txt3
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/ata/ahci-platform.txt b/Documentation/devicetree/bindings/ata/ahci-platform.txt
index 8bb8a76d42e..6c1ad01d27e 100644
--- a/Documentation/devicetree/bindings/ata/ahci-platform.txt
+++ b/Documentation/devicetree/bindings/ata/ahci-platform.txt
@@ -8,6 +8,9 @@ Required properties:
- interrupts : <interrupt mapping for SATA IRQ>
- reg : <registers mapping>
+Optional properties:
+- dma-coherent : Present if dma operations are coherent
+
Example:
sata@ffe08000 {
compatible = "calxeda,hb-ahci";