netdev - [PATCH net-next 04/11] net: phy: provide and use genphy_read_status

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Message-Id: <E1ihD4G-0001yf-BK@rmk-PC.armlinux.org.uk>
Date:   Tue, 17 Dec 2019 13:39:16 +0000
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:     "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Subject: [PATCH net-next 04/11] net: phy: provide and use
 genphy_read_status_fixed()

There are two drivers and generic code which contain exactly the same
code to read the status of a PHY operating without autonegotiation
enabled. Rather than duplicate this code, provide a helper to read
this information.

Signed-off-by: Russell King <rmk+kernel@...linux.org.uk>
---
 drivers/net/phy/lxt.c        | 19 +++-----------
 drivers/net/phy/marvell.c    | 19 +++-----------
 drivers/net/phy/phy_device.c | 49 ++++++++++++++++++++++++------------
 include/linux/phy.h          |  1 +
 4 files changed, 41 insertions(+), 47 deletions(-)

diff --git a/drivers/net/phy/lxt.c b/drivers/net/phy/lxt.c
index 30172852e36e..fec58ad69e02 100644
--- a/drivers/net/phy/lxt.c
+++ b/drivers/net/phy/lxt.c
@@ -192,22 +192,9 @@ static int lxt973a2_read_status(struct phy_device *phydev)
 
 		phy_resolve_aneg_pause(phydev);
 	} else {
-		int bmcr = phy_read(phydev, MII_BMCR);
-
-		if (bmcr < 0)
-			return bmcr;
-
-		if (bmcr & BMCR_FULLDPLX)
-			phydev->duplex = DUPLEX_FULL;
-		else
-			phydev->duplex = DUPLEX_HALF;
-
-		if (bmcr & BMCR_SPEED1000)
-			phydev->speed = SPEED_1000;
-		else if (bmcr & BMCR_SPEED100)
-			phydev->speed = SPEED_100;
-		else
-			phydev->speed = SPEED_10;
+		err = genphy_read_status_fixed(phydev);
+		if (err < 0)
+			return err;
 
 		phydev->pause = phydev->asym_pause = 0;
 		linkmode_zero(phydev->lp_advertising);
diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c
index fa1b9c7bbf6c..fa0ec116960e 100644
--- a/drivers/net/phy/marvell.c
+++ b/drivers/net/phy/marvell.c
@@ -1283,22 +1283,11 @@ static int marvell_read_status_page_an(struct phy_device *phydev,
 
 static int marvell_read_status_page_fixed(struct phy_device *phydev)
 {
-	int bmcr = phy_read(phydev, MII_BMCR);
-
-	if (bmcr < 0)
-		return bmcr;
-
-	if (bmcr & BMCR_FULLDPLX)
-		phydev->duplex = DUPLEX_FULL;
-	else
-		phydev->duplex = DUPLEX_HALF;
+	int err;
 
-	if (bmcr & BMCR_SPEED1000)
-		phydev->speed = SPEED_1000;
-	else if (bmcr & BMCR_SPEED100)
-		phydev->speed = SPEED_100;
-	else
-		phydev->speed = SPEED_10;
+	err = genphy_read_status_fixed(phydev);
+	if (err < 0)
+		return err;
 
 	phydev->pause = 0;
 	phydev->asym_pause = 0;
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index e5854508627b..86a0f5f77278 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -1897,6 +1897,36 @@ int genphy_read_lpa(struct phy_device *phydev)
 }
 EXPORT_SYMBOL(genphy_read_lpa);
 
+/**
+ * genphy_read_status_fixed - read the link parameters for !aneg mode
+ * @phydev: target phy_device struct
+ *
+ * Read the current duplex and speed state for a PHY operating with
+ * autonegotiation disabled.
+ */
+int genphy_read_status_fixed(struct phy_device *phydev)
+{
+	int bmcr = phy_read(phydev, MII_BMCR);
+
+	if (bmcr < 0)
+		return bmcr;
+
+	if (bmcr & BMCR_FULLDPLX)
+		phydev->duplex = DUPLEX_FULL;
+	else
+		phydev->duplex = DUPLEX_HALF;
+
+	if (bmcr & BMCR_SPEED1000)
+		phydev->speed = SPEED_1000;
+	else if (bmcr & BMCR_SPEED100)
+		phydev->speed = SPEED_100;
+	else
+		phydev->speed = SPEED_10;
+
+	return 0;
+}
+EXPORT_SYMBOL(genphy_read_status_fixed);
+
 /**
  * genphy_read_status - check the link status and update current link state
  * @phydev: target phy_device struct
@@ -1931,22 +1961,9 @@ int genphy_read_status(struct phy_device *phydev)
 	if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) {
 		phy_resolve_aneg_linkmode(phydev);
 	} else if (phydev->autoneg == AUTONEG_DISABLE) {
-		int bmcr = phy_read(phydev, MII_BMCR);
-
-		if (bmcr < 0)
-			return bmcr;
-
-		if (bmcr & BMCR_FULLDPLX)
-			phydev->duplex = DUPLEX_FULL;
-		else
-			phydev->duplex = DUPLEX_HALF;
-
-		if (bmcr & BMCR_SPEED1000)
-			phydev->speed = SPEED_1000;
-		else if (bmcr & BMCR_SPEED100)
-			phydev->speed = SPEED_100;
-		else
-			phydev->speed = SPEED_10;
+		err = genphy_read_status_fixed(phydev);
+		if (err < 0)
+			return err;
 	}
 
 	return 0;
diff --git a/include/linux/phy.h b/include/linux/phy.h
index dbcd887f9015..11d25556f803 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -1101,6 +1101,7 @@ int __genphy_config_aneg(struct phy_device *phydev, bool changed);
 int genphy_aneg_done(struct phy_device *phydev);
 int genphy_update_link(struct phy_device *phydev);
 int genphy_read_lpa(struct phy_device *phydev);
+int genphy_read_status_fixed(struct phy_device *phydev);
 int genphy_read_status(struct phy_device *phydev);
 int genphy_suspend(struct phy_device *phydev);
 int genphy_resume(struct phy_device *phydev);
-- 
2.20.1