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-rw-r--r--dts/Bindings/net/socionext-netsec.txt4
1 files changed, 3 insertions, 1 deletions
diff --git a/dts/Bindings/net/socionext-netsec.txt b/dts/Bindings/net/socionext-netsec.txt
index 9d6c9feb12..a3c1dffaa4 100644
--- a/dts/Bindings/net/socionext-netsec.txt
+++ b/dts/Bindings/net/socionext-netsec.txt
@@ -30,7 +30,9 @@ Optional properties: (See ethernet.txt file in the same directory)
- max-frame-size: See ethernet.txt in the same directory.
The MAC address will be determined using the optional properties
-defined in ethernet.txt.
+defined in ethernet.txt. The 'phy-mode' property is required, but may
+be set to the empty string if the PHY configuration is programmed by
+the firmware or set by hardware straps, and needs to be preserved.
Example:
eth0: ethernet@522d0000 {