dt-bindings: net: fsl: enetc: add the IERB documentation

Mention the required compatible string and base address for the
Integrated Endpoint Register Block node.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/Documentation/devicetree/bindings/net/fsl-enetc.txt b/Documentation/devicetree/bindings/net/fsl-enetc.txt
index b7034cc..9b9a3f1 100644 (file)
--- a/Documentation/devicetree/bindings/net/fsl-enetc.txt
+++ b/Documentation/devicetree/bindings/net/fsl-enetc.txt
@@ -102,3 +102,18 @@ Example:
                        full-duplex;
                };
        };
+
+* Integrated Endpoint Register Block bindings
+
+Optionally, the fsl_enetc driver can probe on the Integrated Endpoint Register
+Block, which preconfigures the FIFO limits for the ENETC ports. This is a node
+with the following properties:
+
+- reg          : Specifies the address in the SoC memory space.
+- compatible   : Must be "fsl,ls1028a-enetc-ierb".
+
+Example:
+       ierb@1f0800000 {
+               compatible = "fsl,ls1028a-enetc-ierb";
+               reg = <0x01 0xf0800000 0x0 0x10000>;
+       };