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net: phy: dp83867: Add documentation for SGMII mode type 

Add documentation of ti,sgmii-ref-clock-output-enable
which can be used to select SGMII mode type (4 or 6-wire).

Signed-off-by: Vitaly Gaiduk <vitaly.gaiduk@cloudbear.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vitaly Gaiduk 2019-09-09 20:19:25 +03:00 committed by David S. Miller
parent 9c15d3597c
commit a2111c460c
1 changed files with 4 additions and 0 deletions
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Documentation/devicetree/bindings/net/ti,dp83867.txt
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@ -37,6 +37,10 @@ Optional property:
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.
- ti,sgmii-ref-clock-output-enable - This denotes which
SGMII configuration is used (4 or 6-wire modes).
Some MACs work with differential SGMII clock.
See data manual for details.
Note: ti,min-output-impedance and ti,max-output-impedance are mutually
exclusive. When both properties are present ti,max-output-impedance