From 3e1825e00dafb68eec25df389b63f3ab3d905b59 Mon Sep 17 00:00:00 2001
From: Gabor Juhos <j4g8y7@gmail.com>
Date: Fri, 25 Dec 2020 08:02:47 +0100
Subject: [PATCH] net: phy: define PSGMII PHY interface mode

The PSGMII interface is similar to QSGMII. The main difference
is that the PSGMII interface combines five SGMII lines into a
single link while in QSGMII only four lines are combined.

Similarly to the QSGMII, this interface mode might also needs
special handling within the MAC driver.

Add definitions for the PHY layer to allow to express this type
of connection between the MAC and PHY.

Signed-off-by: Gabor Juhos <j4g8y7@gmail.com>
---
 Documentation/devicetree/bindings/net/ethernet-controller.yaml | 1 +
 drivers/net/phy/phylink.c                                      | 1 +
 include/linux/phy.h                                            | 3 +++
 3 files changed, 5 insertions(+)

--- a/Documentation/devicetree/bindings/net/ethernet-controller.yaml
+++ b/Documentation/devicetree/bindings/net/ethernet-controller.yaml
@@ -64,6 +64,7 @@ properties:
       - mii
       - gmii
       - sgmii
+      - psgmii
       - qsgmii
       - tbi
       - rev-mii
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -629,6 +629,7 @@ static int phylink_parse_mode(struct phy
 
 		switch (pl->link_config.interface) {
 		case PHY_INTERFACE_MODE_SGMII:
+		case PHY_INTERFACE_MODE_PSGMII:
 		case PHY_INTERFACE_MODE_QSGMII:
 			phylink_set(pl->supported, 10baseT_Half);
 			phylink_set(pl->supported, 10baseT_Full);
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -138,6 +138,7 @@ typedef enum {
 	PHY_INTERFACE_MODE_XGMII,
 	PHY_INTERFACE_MODE_XLGMII,
 	PHY_INTERFACE_MODE_MOCA,
+	PHY_INTERFACE_MODE_PSGMII,
 	PHY_INTERFACE_MODE_QSGMII,
 	PHY_INTERFACE_MODE_TRGMII,
 	PHY_INTERFACE_MODE_100BASEX,
@@ -243,6 +244,8 @@ static inline const char *phy_modes(phy_
 		return "xlgmii";
 	case PHY_INTERFACE_MODE_MOCA:
 		return "moca";
+	case PHY_INTERFACE_MODE_PSGMII:
+		return "psgmii";
 	case PHY_INTERFACE_MODE_QSGMII:
 		return "qsgmii";
 	case PHY_INTERFACE_MODE_TRGMII:
