From: Sean Wang <sean.w...@mediatek.com>

Add the dts property for the capability if TRGMII supported on GAMC0

Signed-off-by: Sean Wang <sean.w...@mediatek.com>
---
 Documentation/devicetree/bindings/net/mediatek-net.txt | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/net/mediatek-net.txt 
b/Documentation/devicetree/bindings/net/mediatek-net.txt
index 6103e55..7111278 100644
--- a/Documentation/devicetree/bindings/net/mediatek-net.txt
+++ b/Documentation/devicetree/bindings/net/mediatek-net.txt
@@ -31,7 +31,10 @@ Optional properties:
 Required properties:
 - compatible: Should be "mediatek,eth-mac"
 - reg: The number of the MAC
-- phy-handle: see ethernet.txt file in the same directory.
+- phy-handle: see ethernet.txt file in the same directory and
+       the phy-mode "trgmii" required being provided when reg
+       is equal to 0 and the MAC uses fixed-link to connect
+       with inernal switch such as MT7530.
 
 Example:
 
-- 
1.9.1

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