Add a PHY tunable to select BroadRReach PHY Master/Slave mode.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Heiner Kallweit <hkallweit1@gmail.com>
Cc: Jean Delvare <jdelvare@suse.com>
Cc: netdev@vger.kernel.org
---
 include/uapi/linux/ethtool.h | 1 +
 net/core/ethtool.c           | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index dc69391d2bba..ebe658804ef1 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h

@@ -259,6 +259,7 @@ struct ethtool_tunable {
 enum phy_tunable_id {
 	ETHTOOL_PHY_ID_UNSPEC,
 	ETHTOOL_PHY_DOWNSHIFT,
+	ETHTOOL_PHY_BRR_MODE,
 	/*
 	 * Add your fresh new phy tunable attribute above and remember to update
 	 * phy_tunable_strings[] in net/core/ethtool.c

diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 09d828a6a173..553f3d0e2624 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c

@@ -133,6 +133,7 @@ static const char
 phy_tunable_strings[__ETHTOOL_PHY_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
 	[ETHTOOL_ID_UNSPEC]     = "Unspec",
 	[ETHTOOL_PHY_DOWNSHIFT]	= "phy-downshift",
+	[ETHTOOL_PHY_BRR_MODE]	= "phy-broadrreach-mode",
 };

 
 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)

@@ -2524,6 +2525,7 @@ static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
 {
 	switch (tuna->id) {
 	case ETHTOOL_PHY_DOWNSHIFT:
+	case ETHTOOL_PHY_BRR_MODE:
 		if (tuna->len != sizeof(u8) ||
 		    tuna->type_id != ETHTOOL_TUNABLE_U8)
 			return -EINVAL;