netdev - [PATCH v2 4/5] net: phy: realtek: demystify PHYSR register location

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Message-ID: <6ed246e0aa3ca8038d2fa432d51518959fb89b6b.1768275364.git.daniel@makrotopia.org>
Date: Tue, 13 Jan 2026 03:44:33 +0000
From: Daniel Golle <daniel@...rotopia.org>
To: Andrew Lunn <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Daniel Golle <daniel@...rotopia.org>,
	Michael Klein <michael@...sekall.de>,
	Vladimir Oltean <vladimir.oltean@....com>,
	Aleksander Jan Bajkowski <olek2@...pl>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 4/5] net: phy: realtek: demystify PHYSR register location

Turns out that register address RTL_VND2_PHYSR (0xa434) maps to
Clause-22 register MII_RESV2. Use that to get rid of yet another magic
number, and rename access macros accordingly.

Signed-off-by: Daniel Golle <daniel@...rotopia.org>
---
v2: rebase on top of recent commit
    "net: phy: realtek: add dummy PHY driver for RTL8127ATF"
    replacing newly added reference to RTL_VND2_PHYSR

 drivers/net/phy/realtek/realtek_main.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/drivers/net/phy/realtek/realtek_main.c b/drivers/net/phy/realtek/realtek_main.c
index 4512fad3f64b8..8f1c8424e7f94 100644
--- a/drivers/net/phy/realtek/realtek_main.c
+++ b/drivers/net/phy/realtek/realtek_main.c
@@ -179,12 +179,12 @@
 #define RTL9000A_GINMR				0x14
 #define RTL9000A_GINMR_LINK_STATUS		BIT(4)
 
-#define RTL_VND2_PHYSR				0xa434
-#define RTL_VND2_PHYSR_DUPLEX			BIT(3)
-#define RTL_VND2_PHYSR_SPEEDL			GENMASK(5, 4)
-#define RTL_VND2_PHYSR_SPEEDH			GENMASK(10, 9)
-#define RTL_VND2_PHYSR_MASTER			BIT(11)
-#define RTL_VND2_PHYSR_SPEED_MASK		(RTL_VND2_PHYSR_SPEEDL | RTL_VND2_PHYSR_SPEEDH)
+#define RTL_PHYSR				MII_RESV2
+#define RTL_PHYSR_DUPLEX			BIT(3)
+#define RTL_PHYSR_SPEEDL			GENMASK(5, 4)
+#define RTL_PHYSR_SPEEDH			GENMASK(10, 9)
+#define RTL_PHYSR_MASTER			BIT(11)
+#define RTL_PHYSR_SPEED_MASK			(RTL_PHYSR_SPEEDL | RTL_PHYSR_SPEEDH)
 
 #define	RTL_MDIO_PCS_EEE_ABLE			0xa5c4
 #define	RTL_MDIO_AN_EEE_ADV			0xa5d0
@@ -1103,12 +1103,12 @@ static void rtlgen_decode_physr(struct phy_device *phydev, int val)
 	 * 0: Half Duplex
 	 * 1: Full Duplex
 	 */
-	if (val & RTL_VND2_PHYSR_DUPLEX)
+	if (val & RTL_PHYSR_DUPLEX)
 		phydev->duplex = DUPLEX_FULL;
 	else
 		phydev->duplex = DUPLEX_HALF;
 
-	switch (val & RTL_VND2_PHYSR_SPEED_MASK) {
+	switch (val & RTL_PHYSR_SPEED_MASK) {
 	case 0x0000:
 		phydev->speed = SPEED_10;
 		break;
@@ -1136,7 +1136,7 @@ static void rtlgen_decode_physr(struct phy_device *phydev, int val)
 	 * 1: Master Mode
 	 */
 	if (phydev->speed >= 1000) {
-		if (val & RTL_VND2_PHYSR_MASTER)
+		if (val & RTL_PHYSR_MASTER)
 			phydev->master_slave_state = MASTER_SLAVE_STATE_MASTER;
 		else
 			phydev->master_slave_state = MASTER_SLAVE_STATE_SLAVE;
@@ -1156,8 +1156,7 @@ static int rtlgen_read_status(struct phy_device *phydev)
 	if (!phydev->link)
 		return 0;
 
-	val = phy_read_paged(phydev, RTL822X_VND2_TO_PAGE(RTL_VND2_PHYSR),
-			     RTL822X_VND2_TO_PAGE_REG(RTL_VND2_PHYSR));
+	val = phy_read(phydev, RTL_PHYSR);
 	if (val < 0)
 		return val;
 
@@ -1623,7 +1622,8 @@ static int rtl822x_c45_read_status(struct phy_device *phydev)
 	}
 
 	/* Read actual speed from vendor register. */
-	val = phy_read_mmd(phydev, MDIO_MMD_VEND2, RTL_VND2_PHYSR);
+	val = phy_read_mmd(phydev, MDIO_MMD_VEND2,
+			   RTL822X_VND2_C22_REG(RTL_PHYSR));
 	if (val < 0)
 		return val;
 
@@ -2127,7 +2127,7 @@ static int rtlgen_sfp_read_status(struct phy_device *phydev)
 	if (!phydev->link)
 		return 0;
 
-	val = rtlgen_read_vend2(phydev, RTL_VND2_PHYSR);
+	val = phy_read(phydev, RTL_PHYSR);
 	if (val < 0)
 		return val;
 
-- 
2.52.0