netdev - [PATCH V3 net-next] net: phy: realtek: add support for RTL8211F(D)(I)-VD-CG

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Date:   Wed, 17 Aug 2022 09:36:18 +0800
From:   wei.fang@....com
To:     andrew@...n.ch, hkallweit1@...il.com, linux@...linux.org.uk,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, netdev@...r.kernel.org
Cc:     xiaoning.wang@....com
Subject: [PATCH V3 net-next] net: phy: realtek: add support for RTL8211F(D)(I)-VD-CG

From: Clark Wang <xiaoning.wang@....com>

RTL8211F(D)(I)-VD-CG is the pin-to-pin upgrade chip from
RTL8211F(D)(I)-CG.

Add new PHY ID for this chip.
It does not support RTL8211F_PHYCR2 anymore, so remove the w/r operation
of this register.

Signed-off-by: Clark Wang <xiaoning.wang@....com>
Signed-off-by: Wei Fang <wei.fang@....com>
---
V2 change:
1. Commit message changed, RTL8221 instead of RTL8821.
2. Add has_phycr2 to struct rtl821x_priv.
V3 change:
There is a typo, actually the phy chip is RTL8211, So I correct it in
the coommit message and subject.
---
 drivers/net/phy/realtek.c | 44 ++++++++++++++++++++++++++++-----------
 1 file changed, 32 insertions(+), 12 deletions(-)

diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c
index a5671ab896b3..3d99fd6664d7 100644
--- a/drivers/net/phy/realtek.c
+++ b/drivers/net/phy/realtek.c
@@ -70,6 +70,7 @@
 #define RTLGEN_SPEED_MASK			0x0630
 
 #define RTL_GENERIC_PHYID			0x001cc800
+#define RTL_8211FVD_PHYID			0x001cc878
 
 MODULE_DESCRIPTION("Realtek PHY driver");
 MODULE_AUTHOR("Johnson Leung");
@@ -78,6 +79,7 @@ MODULE_LICENSE("GPL");
 struct rtl821x_priv {
 	u16 phycr1;
 	u16 phycr2;
+	bool has_phycr2;
 };
 
 static int rtl821x_read_page(struct phy_device *phydev)
@@ -94,6 +96,7 @@ static int rtl821x_probe(struct phy_device *phydev)
 {
 	struct device *dev = &phydev->mdio.dev;
 	struct rtl821x_priv *priv;
+	u32 phy_id = phydev->drv->phy_id;
 	int ret;
 
 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
@@ -108,13 +111,16 @@ static int rtl821x_probe(struct phy_device *phydev)
 	if (of_property_read_bool(dev->of_node, "realtek,aldps-enable"))
 		priv->phycr1 |= RTL8211F_ALDPS_PLL_OFF | RTL8211F_ALDPS_ENABLE | RTL8211F_ALDPS_XTAL_OFF;
 
-	ret = phy_read_paged(phydev, 0xa43, RTL8211F_PHYCR2);
-	if (ret < 0)
-		return ret;
+	priv->has_phycr2 = !(phy_id == RTL_8211FVD_PHYID);
+	if (priv->has_phycr2) {
+		ret = phy_read_paged(phydev, 0xa43, RTL8211F_PHYCR2);
+		if (ret < 0)
+			return ret;
 
-	priv->phycr2 = ret & RTL8211F_CLKOUT_EN;
-	if (of_property_read_bool(dev->of_node, "realtek,clkout-disable"))
-		priv->phycr2 &= ~RTL8211F_CLKOUT_EN;
+		priv->phycr2 = ret & RTL8211F_CLKOUT_EN;
+		if (of_property_read_bool(dev->of_node, "realtek,clkout-disable"))
+			priv->phycr2 &= ~RTL8211F_CLKOUT_EN;
+	}
 
 	phydev->priv = priv;
 
@@ -400,12 +406,14 @@ static int rtl8211f_config_init(struct phy_device *phydev)
 			val_rxdly ? "enabled" : "disabled");
 	}
 
-	ret = phy_modify_paged(phydev, 0xa43, RTL8211F_PHYCR2,
-			       RTL8211F_CLKOUT_EN, priv->phycr2);
-	if (ret < 0) {
-		dev_err(dev, "clkout configuration failed: %pe\n",
-			ERR_PTR(ret));
-		return ret;
+	if (priv->has_phycr2) {
+		ret = phy_modify_paged(phydev, 0xa43, RTL8211F_PHYCR2,
+				       RTL8211F_CLKOUT_EN, priv->phycr2);
+		if (ret < 0) {
+			dev_err(dev, "clkout configuration failed: %pe\n",
+				ERR_PTR(ret));
+			return ret;
+		}
 	}
 
 	return genphy_soft_reset(phydev);
@@ -923,6 +931,18 @@ static struct phy_driver realtek_drvs[] = {
 		.resume		= rtl821x_resume,
 		.read_page	= rtl821x_read_page,
 		.write_page	= rtl821x_write_page,
+	}, {
+		PHY_ID_MATCH_EXACT(RTL_8211FVD_PHYID),
+		.name		= "RTL8211F-VD Gigabit Ethernet",
+		.probe		= rtl821x_probe,
+		.config_init	= &rtl8211f_config_init,
+		.read_status	= rtlgen_read_status,
+		.config_intr	= &rtl8211f_config_intr,
+		.handle_interrupt = rtl8211f_handle_interrupt,
+		.suspend	= genphy_suspend,
+		.resume		= rtl821x_resume,
+		.read_page	= rtl821x_read_page,
+		.write_page	= rtl821x_write_page,
 	}, {
 		.name		= "Generic FE-GE Realtek PHY",
 		.match_phy_device = rtlgen_match_phy_device,
-- 
2.25.1