Commit 607c7029 authored by Raju Lakkaraju's avatar Raju Lakkaraju Committed by David S. Miller

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: default avatarRaju Lakkaraju <Raju.Lakkaraju@microsemi.com>
Signed-off-by: default avatarAllan W. Nielsen <allan.nielsen@microsemi.com>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 968ad9da
......@@ -248,9 +248,12 @@ struct ethtool_tunable {
void *data[0];
};
#define DOWNSHIFT_DEV_DEFAULT_COUNT 0xff
#define DOWNSHIFT_DEV_DISABLE 0
enum phy_tunable_id {
ETHTOOL_PHY_ID_UNSPEC,
ETHTOOL_PHY_DOWNSHIFT,
/*
* Add your fresh new phy tunable attribute above and remember to update
* phy_tunable_strings[] in net/core/ethtool.c
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment