[PATCH net-next 2/2] dt-bindings: add mdio frequency description

[Andy Chiu]

Add a property to set mdio bus frequency at runtime by DT.

Signed-off-by: Andy Chiu <andy.chiu at sifive.com>
Reviewed-by: Greentime Hu <greentime.hu at sifive.com>
---
 Documentation/devicetree/bindings/net/xilinx_axienet.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/xilinx_axienet.txt b/Documentation/devicetree/bindings/net/xilinx_axienet.txt
index 1aa4c6006cd0..d78cf402aa2a 100644
--- a/Documentation/devicetree/bindings/net/xilinx_axienet.txt
+++ b/Documentation/devicetree/bindings/net/xilinx_axienet.txt
@@ -43,6 +43,9 @@ Optional properties:
 		  support both 1000BaseX and SGMII modes. If set, the phy-mode
 		  should be set to match the mode selected on core reset (i.e.
 		  by the basex_or_sgmii core input line).
+- xlnx,mdio-freq: Define the clock frequency of the MDIO bus. If the property
+		  does not pressent on the DT, then the mdio driver would use
+		  the default 2.5 MHz clock, as mentioned on 802.3 spc.
 - clock-names: 	  Tuple listing input clock names. Possible clocks:
 		  s_axi_lite_clk: Clock for AXI register slave interface
 		  axis_clk: AXI4-Stream clock for TXD RXD TXC and RXS interfaces
-- 
2.36.0