diff --git a/Documentation/switchtec.txt b/Documentation/switchtec.txt
index a0a9c7b3d4d5..f788264921ff 100644
--- a/Documentation/switchtec.txt
+++ b/Documentation/switchtec.txt
@@ -78,3 +78,15 @@ The following IOCTLs are also supported by the device:
   between PCI Function Framework number (used by the event system)
   and Switchtec Logic Port ID and Partition number (which is more
   user friendly).
+
+
+Non-Transparent Bridge (NTB) Driver
+===================================
+
+An NTB driver is provided for the switchtec hardware in switchtec_ntb.
+Currently, it only supports switches configured with exactly 2
+partitions. It also requires the following configuration settings:
+
+* Both partitions must be able to access each other's GAS spaces.
+  Thus, the bits in the GAS Access Vector under Management Settings
+  must be set to support this.