dt-bindings: net: Document fsl,erratum-a009885

Update FMan binding documentation with the newly added workaround for
erratum A-009885.

Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/Documentation/devicetree/bindings/net/fsl-fman.txt b/Documentation/devicetree/bindings/net/fsl-fman.txt
index c00fb0d..020337f 100644 (file)
--- a/Documentation/devicetree/bindings/net/fsl-fman.txt
+++ b/Documentation/devicetree/bindings/net/fsl-fman.txt
@@ -410,6 +410,15 @@ PROPERTIES
                The settings and programming routines for internal/external
                MDIO are different. Must be included for internal MDIO.
 
+- fsl,erratum-a009885
+               Usage: optional
+               Value type: <boolean>
+               Definition: Indicates the presence of the A009885
+               erratum describing that the contents of MDIO_DATA may
+               become corrupt unless it is read within 16 MDC cycles
+               of MDIO_CFG[BSY] being cleared, when performing an
+               MDIO read operation.
+
 - fsl,erratum-a011043
                Usage: optional
                Value type: <boolean>