[PATCH net-next v2 3/9] net: phy: add kr phy connection type

[Florinel Iordache <florinel.iordache@nxp.com>]

Add support for backplane kr phy connection types currently available
(10gbase-kr, 40gbase-kr4) and the required phylink updates (cover all
the cases for KR modes which are clause 45 compatible to correctly assign
phy_interface and phylink#supported)

Signed-off-by: Florinel Iordache <florinel.iordache@nxp.com>
---
 drivers/net/phy/phylink.c | 15 ++++++++++++---
 include/linux/phy.h       |  6 +++++-
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index 34ca12a..9a31f68 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -4,6 +4,7 @@
  * technologies such as SFP cages where the PHY is hot-pluggable.
  *
  * Copyright (C) 2015 Russell King
+ * Copyright 2020 NXP
  */
 #include <linux/ethtool.h>
 #include <linux/export.h>
@@ -304,7 +305,6 @@ static int phylink_parse_mode(struct phylink *pl, struct fwnode_handle *fwnode)
 			break;
 
 		case PHY_INTERFACE_MODE_USXGMII:
-		case PHY_INTERFACE_MODE_10GKR:
 		case PHY_INTERFACE_MODE_10GBASER:
 			phylink_set(pl->supported, 10baseT_Half);
 			phylink_set(pl->supported, 10baseT_Full);
@@ -318,7 +318,6 @@ static int phylink_parse_mode(struct phylink *pl, struct fwnode_handle *fwnode)
 			phylink_set(pl->supported, 2500baseX_Full);
 			phylink_set(pl->supported, 5000baseT_Full);
 			phylink_set(pl->supported, 10000baseT_Full);
-			phylink_set(pl->supported, 10000baseKR_Full);
 			phylink_set(pl->supported, 10000baseKX4_Full);
 			phylink_set(pl->supported, 10000baseCR_Full);
 			phylink_set(pl->supported, 10000baseSR_Full);
@@ -327,6 +326,14 @@ static int phylink_parse_mode(struct phylink *pl, struct fwnode_handle *fwnode)
 			phylink_set(pl->supported, 10000baseER_Full);
 			break;
 
+		case PHY_INTERFACE_MODE_10GKR:
+			phylink_set(pl->supported, 10000baseKR_Full);
+			break;
+
+		case PHY_INTERFACE_MODE_40GKR4:
+			phylink_set(pl->supported, 40000baseKR4_Full);
+			break;
+
 		case PHY_INTERFACE_MODE_XLGMII:
 			phylink_set(pl->supported, 25000baseCR_Full);
 			phylink_set(pl->supported, 25000baseKR_Full);
@@ -860,7 +867,9 @@ static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy,
 	if (phy->is_c45 &&
 	    interface != PHY_INTERFACE_MODE_RXAUI &&
 	    interface != PHY_INTERFACE_MODE_XAUI &&
-	    interface != PHY_INTERFACE_MODE_USXGMII)
+	    interface != PHY_INTERFACE_MODE_USXGMII &&
+	    interface != PHY_INTERFACE_MODE_10GKR &&
+	    interface != PHY_INTERFACE_MODE_40GKR4)
 		config.interface = PHY_INTERFACE_MODE_NA;
 	else
 		config.interface = interface;
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 2432ca4..d7cca4b 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -6,6 +6,7 @@
  * Author: Andy Fleming
  *
  * Copyright (c) 2004 Freescale Semiconductor, Inc.
+ * Copyright 2020 NXP
  */
 
 #ifndef __PHY_H
@@ -107,8 +108,9 @@
 	/* 10GBASE-R, XFI, SFI - single lane 10G Serdes */
 	PHY_INTERFACE_MODE_10GBASER,
 	PHY_INTERFACE_MODE_USXGMII,
-	/* 10GBASE-KR - with Clause 73 AN */
+	/* Backplane KR */
 	PHY_INTERFACE_MODE_10GKR,
+	PHY_INTERFACE_MODE_40GKR4,
 	PHY_INTERFACE_MODE_MAX,
 } phy_interface_t;
 
@@ -190,6 +192,8 @@ static inline const char *phy_modes(phy_interface_t interface)
 		return "usxgmii";
 	case PHY_INTERFACE_MODE_10GKR:
 		return "10gbase-kr";
+	case PHY_INTERFACE_MODE_40GKR4:
+		return "40gbase-kr4";
 	default:
 		return "unknown";
 	}
-- 
1.9.1