ethtool: (uapi) Add ETHTOOL_PHY_DOWNSHIFT to PHY tunables
authorRaju Lakkaraju <Raju.Lakkaraju@microsemi.com>
Thu, 17 Nov 2016 12:07:22 +0000 (13:07 +0100)
committerDavid S. Miller <davem@davemloft.net>
Fri, 18 Nov 2016 17:12:14 +0000 (12:12 -0500)
commit607c7029146790201e90b58c4235ddff0304d6e0
tree7f00fbf68b795424f40bfeecf8220c3be5650750
parent968ad9da7e0e333e25442950e10a1b631981ce84
ethtool: (uapi) Add ETHTOOL_PHY_DOWNSHIFT to PHY tunables

For operation in cabling environments that are incompatible with
1000BASE-T, PHY device may provide an automatic link speed downshift
operation. When enabled, the device automatically changes its 1000BASE-T
auto-negotiation to the next slower speed after a configured number of
failed attempts at 1000BASE-T.  This feature is useful in setting up in
networks using older cable installations that include only pairs A and B,
and not pairs C and D.

Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@microsemi.com>
Signed-off-by: Allan W. Nielsen <allan.nielsen@microsemi.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/uapi/linux/ethtool.h