From 157ac9f52fd9b9a22cf12f7755a905fb34ef72f7 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                                      | 2 ++
 include/linux/phy.h                                            | 3 +++
 3 files changed, 6 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
@@ -371,6 +371,7 @@ void phylink_get_linkmodes(unsigned long
 	case PHY_INTERFACE_MODE_RGMII_RXID:
 	case PHY_INTERFACE_MODE_RGMII_ID:
 	case PHY_INTERFACE_MODE_RGMII:
+	case PHY_INTERFACE_MODE_PSGMII:
 	case PHY_INTERFACE_MODE_QSGMII:
 	case PHY_INTERFACE_MODE_SGMII:
 	case PHY_INTERFACE_MODE_GMII:
@@ -634,6 +635,7 @@ 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
@@ -139,6 +139,7 @@ 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,
@@ -244,6 +245,8 @@ 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:
