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Date:   Tue, 14 Apr 2020 20:49:03 +0100
From:   Russell King <rmk+kernel@...linux.org.uk>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>
Cc:     Matteo Croce <mcroce@...hat.com>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Subject: [PATCH net v2 1/2] net: marvell10g: report firmware version

Report the firmware version when probing the PHY to allow issues
attributable to firmware to be diagnosed.

Tested-by: Matteo Croce <mcroce@...hat.com>
Signed-off-by: Russell King <rmk+kernel@...linux.org.uk>
---
 drivers/net/phy/marvell10g.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/net/phy/marvell10g.c b/drivers/net/phy/marvell10g.c
index 7621badae64d..748532d9e1ae 100644
--- a/drivers/net/phy/marvell10g.c
+++ b/drivers/net/phy/marvell10g.c
@@ -33,6 +33,8 @@
 #define MV_PHY_ALASKA_NBT_QUIRK_REV	(MARVELL_PHY_ID_88X3310 | 0xa)
 
 enum {
+	MV_PMA_FW_VER0		= 0xc011,
+	MV_PMA_FW_VER1		= 0xc012,
 	MV_PMA_BOOT		= 0xc050,
 	MV_PMA_BOOT_FATAL	= BIT(0),
 
@@ -83,6 +85,8 @@ enum {
 };
 
 struct mv3310_priv {
+	u32 firmware_ver;
+
 	struct device *hwmon_dev;
 	char *hwmon_name;
 };
@@ -355,6 +359,22 @@ static int mv3310_probe(struct phy_device *phydev)
 
 	dev_set_drvdata(&phydev->mdio.dev, priv);
 
+	ret = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MV_PMA_FW_VER0);
+	if (ret < 0)
+		return ret;
+
+	priv->firmware_ver = ret << 16;
+
+	ret = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MV_PMA_FW_VER1);
+	if (ret < 0)
+		return ret;
+
+	priv->firmware_ver |= ret;
+
+	phydev_info(phydev, "Firmware version %u.%u.%u.%u\n",
+		    priv->firmware_ver >> 24, (priv->firmware_ver >> 16) & 255,
+		    (priv->firmware_ver >> 8) & 255, priv->firmware_ver & 255);
+
 	/* Powering down the port when not in use saves about 600mW */
 	ret = mv3310_power_down(phydev);
 	if (ret)
-- 
2.20.1

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