[SRU][R][PATCH 2/7] UBUNTU: SAUCE: net: phy: realtek: add support for dummy phy

[AceLan Kao]

From: Javen Xu <javen_xu at realsil.com.cn>

BugLink: https://bugs.launchpad.net/bugs/2160475

Add support for rtl8116af dummy phy driver, match phy id and read link
speed from MII_BMCR.

Signed-off-by: Javen Xu <javen_xu at realsil.com.cn>
(cherry picked from commit https://lore.kernel.org/netdev/20260603065916.334-2-javen_xu@realsil.com.cn/)
Signed-off-by: Chia-Lin Kao (AceLan) <acelan.kao at canonical.com>
---
 drivers/net/phy/realtek/realtek_main.c | 54 ++++++++++++++++++++++++++
 include/net/phy/realtek_phy.h          |  1 +
 2 files changed, 55 insertions(+)

diff --git a/drivers/net/phy/realtek/realtek_main.c b/drivers/net/phy/realtek/realtek_main.c
index 75565fbdbf6d..efa8c654745c 100644
--- a/drivers/net/phy/realtek/realtek_main.c
+++ b/drivers/net/phy/realtek/realtek_main.c
@@ -2114,6 +2114,47 @@ static int rtlgen_sfp_get_features(struct phy_device *phydev)
 	return 0;
 }
 
+static int rtl8116af_sfp_get_features(struct phy_device *phydev)
+{
+	linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
+			 phydev->supported);
+
+	phydev->speed = SPEED_1000;
+	phydev->duplex = DUPLEX_FULL;
+
+	phydev->port = PORT_FIBRE;
+
+	return 0;
+}
+
+static int rtl8116af_sfp_read_status(struct phy_device *phydev)
+{
+	int val, err;
+
+	err = genphy_update_link(phydev);
+	if (err)
+		return err;
+
+	if (!phydev->link)
+		return 0;
+
+	val = phy_read(phydev, MII_BMCR);
+	if (val < 0)
+		return val;
+
+	if (val & BMCR_SPEED1000)
+		phydev->speed = SPEED_1000;
+	else if (val & BMCR_SPEED100)
+		phydev->speed = SPEED_100;
+
+	if (val & BMCR_FULLDPLX)
+		phydev->duplex = DUPLEX_FULL;
+	else
+		phydev->duplex = DUPLEX_HALF;
+
+	return 0;
+}
+
 static int rtlgen_sfp_read_status(struct phy_device *phydev)
 {
 	int val, err;
@@ -2388,6 +2429,19 @@ static struct phy_driver realtek_drvs[] = {
 		.write_page	= rtl821x_write_page,
 		.read_mmd	= rtl822x_read_mmd,
 		.write_mmd	= rtl822x_write_mmd,
+	}, {
+		PHY_ID_MATCH_EXACT(PHY_ID_RTL8116AF_DUMMY),
+		.name		= "RTL8116af PHY Mode",
+		.flags		= PHY_IS_INTERNAL,
+		.get_features	= rtl8116af_sfp_get_features,
+		.config_aneg	= rtlgen_sfp_config_aneg,
+		.read_status	= rtl8116af_sfp_read_status,
+		.suspend	= genphy_suspend,
+		.resume		= rtlgen_resume,
+		.read_page	= rtl821x_read_page,
+		.write_page	= rtl821x_write_page,
+		.read_mmd	= rtl822x_read_mmd,
+		.write_mmd	= rtl822x_write_mmd,
 	}, {
 		PHY_ID_MATCH_EXACT(0x001ccad0),
 		.name		= "RTL8224 2.5Gbps PHY",
diff --git a/include/net/phy/realtek_phy.h b/include/net/phy/realtek_phy.h
index d683bc1b0659..cbf91af0ead6 100644
--- a/include/net/phy/realtek_phy.h
+++ b/include/net/phy/realtek_phy.h
@@ -3,5 +3,6 @@
 #define _REALTEK_PHY_H
 
 #define	PHY_ID_RTL_DUMMY_SFP	0x001ccbff
+#define PHY_ID_RTL8116AF_DUMMY  0x001ccbfe
 
 #endif /* _REALTEK_PHY_H */
-- 
2.53.0