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-rw-r--r--Documentation/devicetree/bindings/net/ti,dp83867.txt14
1 files changed, 12 insertions, 2 deletions
diff --git a/Documentation/devicetree/bindings/net/ti,dp83867.txt b/Documentation/devicetree/bindings/net/ti,dp83867.txt
index 9ef9338aaee1..db6aa3f2215b 100644
--- a/Documentation/devicetree/bindings/net/ti,dp83867.txt
+++ b/Documentation/devicetree/bindings/net/ti,dp83867.txt
@@ -11,6 +11,14 @@ Required properties:
- ti,fifo-depth - Transmitt FIFO depth- see dt-bindings/net/ti-dp83867.h
for applicable values
+Note: If the interface type is PHY_INTERFACE_MODE_RGMII the TX/RX clock delays
+ will be left at their default values, as set by the PHY's pin strapping.
+ The default strapping will use a delay of 2.00 ns. Thus
+ PHY_INTERFACE_MODE_RGMII, by default, does not behave as RGMII with no
+ internal delay, but as PHY_INTERFACE_MODE_RGMII_ID. The device tree
+ should use "rgmii-id" if internal delays are desired as this may be
+ changed in future to cause "rgmii" mode to disable delays.
+
Optional property:
- ti,min-output-impedance - MAC Interface Impedance control to set
the programmable output impedance to
@@ -25,8 +33,10 @@ Optional property:
software needs to take when this pin is
strapped in these modes. See data manual
for details.
- - ti,clk-output-sel - Muxing option for CLK_OUT pin - see dt-bindings/net/ti-dp83867.h
- for applicable values.
+ - ti,clk-output-sel - Muxing option for CLK_OUT pin. See dt-bindings/net/ti-dp83867.h
+ for applicable values. The CLK_OUT pin can also
+ be disabled by this property. When omitted, the
+ PHY's default will be left as is.
Note: ti,min-output-impedance and ti,max-output-impedance are mutually
exclusive. When both properties are present ti,max-output-impedance