1 files changed, 61 insertions, 24 deletions

diff --git a/drivers/net/phy/xilinx_gmii2rgmii.c b/drivers/net/phy/xilinx_gmii2rgmii.c
index d15dd3938ba8..2024d8ef36d9 100644
--- a/drivers/net/phy/xilinx_gmii2rgmii.c
+++ b/drivers/net/phy/xilinx_gmii2rgmii.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /* Xilinx GMII2RGMII Converter driver
  *
  * Copyright (C) 2016 Xilinx, Inc.
@@ -8,22 +9,13 @@
  *
  * Description:
  * This driver is developed for Xilinx GMII2RGMII Converter
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/mii.h>
 #include <linux/mdio.h>
 #include <linux/phy.h>
+#include <linux/clk.h>
 #include <linux/of_mdio.h>
 
 #define XILINX_GMII2RGMII_REG		0x10
@@ -31,29 +23,61 @@
 
 struct gmii2rgmii {
 	struct phy_device *phy_dev;
-	struct phy_driver *phy_drv;
+	const struct phy_driver *phy_drv;
 	struct phy_driver conv_phy_drv;
-	int addr;
+	struct mdio_device *mdio;
 };
 
-static int xgmiitorgmii_read_status(struct phy_device *phydev)
+static void xgmiitorgmii_configure(struct gmii2rgmii *priv, int speed)
 {
-	struct gmii2rgmii *priv = phydev->priv;
-	u16 val = 0;
+	struct mii_bus *bus = priv->mdio->bus;
+	int addr = priv->mdio->addr;
+	u16 val;
 
-	priv->phy_drv->read_status(phydev);
+	val = mdiobus_read(bus, addr, XILINX_GMII2RGMII_REG);
+	val &= ~XILINX_GMII2RGMII_SPEED_MASK;
 
-	val = mdiobus_read(phydev->mdio.bus, priv->addr, XILINX_GMII2RGMII_REG);
-	val &= XILINX_GMII2RGMII_SPEED_MASK;
-
-	if (phydev->speed == SPEED_1000)
+	if (speed == SPEED_1000)
 		val |= BMCR_SPEED1000;
-	else if (phydev->speed == SPEED_100)
+	else if (speed == SPEED_100)
 		val |= BMCR_SPEED100;
 	else
 		val |= BMCR_SPEED10;
 
-	mdiobus_write(phydev->mdio.bus, priv->addr, XILINX_GMII2RGMII_REG, val);
+	mdiobus_write(bus, addr, XILINX_GMII2RGMII_REG, val);
+}
+
+static int xgmiitorgmii_read_status(struct phy_device *phydev)
+{
+	struct gmii2rgmii *priv = mdiodev_get_drvdata(&phydev->mdio);
+	int err;
+
+	if (priv->phy_drv->read_status)
+		err = priv->phy_drv->read_status(phydev);
+	else
+		err = genphy_read_status(phydev);
+	if (err < 0)
+		return err;
+
+	xgmiitorgmii_configure(priv, phydev->speed);
+
+	return 0;
+}
+
+static int xgmiitorgmii_set_loopback(struct phy_device *phydev, bool enable,
+				     int speed)
+{
+	struct gmii2rgmii *priv = mdiodev_get_drvdata(&phydev->mdio);
+	int err;
+
+	if (priv->phy_drv->set_loopback)
+		err = priv->phy_drv->set_loopback(phydev, enable, speed);
+	else
+		err = genphy_loopback(phydev, enable, speed);
+	if (err < 0)
+		return err;
+
+	xgmiitorgmii_configure(priv, phydev->speed);
 
 	return 0;
 }
@@ -63,11 +87,17 @@ static int xgmiitorgmii_probe(struct mdio_device *mdiodev)
 	struct device *dev = &mdiodev->dev;
 	struct device_node *np = dev->of_node, *phy_node;
 	struct gmii2rgmii *priv;
+	struct clk *clkin;
 
 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
 
+	clkin = devm_clk_get_optional_enabled(dev, NULL);
+	if (IS_ERR(clkin))
+		return dev_err_probe(dev, PTR_ERR(clkin),
+					"Failed to get and enable clock from Device Tree\n");
+
 	phy_node = of_parse_phandle(np, "phy-handle", 0);
 	if (!phy_node) {
 		dev_err(dev, "Couldn't parse phy-handle\n");
@@ -81,12 +111,19 @@ static int xgmiitorgmii_probe(struct mdio_device *mdiodev)
 		return -EPROBE_DEFER;
 	}
 
-	priv->addr = mdiodev->addr;
+	if (!priv->phy_dev->drv) {
+		dev_info(dev, "Attached phy not ready\n");
+		put_device(&priv->phy_dev->mdio.dev);
+		return -EPROBE_DEFER;
+	}
+
+	priv->mdio = mdiodev;
 	priv->phy_drv = priv->phy_dev->drv;
 	memcpy(&priv->conv_phy_drv, priv->phy_dev->drv,
 	       sizeof(struct phy_driver));
 	priv->conv_phy_drv.read_status = xgmiitorgmii_read_status;
-	priv->phy_dev->priv = priv;
+	priv->conv_phy_drv.set_loopback = xgmiitorgmii_set_loopback;
+	mdiodev_set_drvdata(&priv->phy_dev->mdio, priv);
 	priv->phy_dev->drv = &priv->conv_phy_drv;
 
 	return 0;