From d85458256ad2583df95deb0bb7a3403b74be177a Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Sat, 14 Jul 2018 11:45:53 +0200
Subject: [PATCH] net: phy: realtek: Support RTL8366RB variant
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The RTL8366RB is an ASIC with five internal PHYs for
LAN0..LAN3 and WAN. The PHYs are spawn off the main
device so they can be handled in a distributed manner
by the Realtek PHY driver. All that is really needed
is the power save feature enablement and letting the
PHY driver core pick up the IRQ from the switch chip.

Cc: Antti Seppälä <a.seppala@gmail.com>
Cc: Roman Yeryomin <roman@advem.lv>
Cc: Colin Leitner <colin.leitner@googlemail.com>
Cc: Gabor Juhos <juhosg@openwrt.org>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/phy/realtek.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c
index 0610148cc1ff..7fc8508b5231 100644
--- a/drivers/net/phy/realtek.c
+++ b/drivers/net/phy/realtek.c
@@ -37,6 +37,9 @@
 #define RTL8201F_ISR				0x1e
 #define RTL8201F_IER				0x13
 
+#define RTL8366RB_POWER_SAVE			0x15
+#define RTL8366RB_POWER_SAVE_ON			BIT(12)
+
 MODULE_DESCRIPTION("Realtek PHY driver");
 MODULE_AUTHOR("Johnson Leung");
 MODULE_LICENSE("GPL");
@@ -190,6 +193,24 @@ static int rtl8211b_resume(struct phy_device *phydev)
 	return genphy_resume(phydev);
 }
 
+static int rtl8366rb_config_init(struct phy_device *phydev)
+{
+	int ret;
+
+	ret = genphy_config_init(phydev);
+	if (ret < 0)
+		return ret;
+
+	ret = phy_set_bits(phydev, RTL8366RB_POWER_SAVE,
+			   RTL8366RB_POWER_SAVE_ON);
+	if (ret) {
+		dev_err(&phydev->mdio.dev,
+			"error enabling power management\n");
+	}
+
+	return ret;
+}
+
 static struct phy_driver realtek_drvs[] = {
 	{
 		.phy_id         = 0x00008201,
@@ -270,6 +291,15 @@ static struct phy_driver realtek_drvs[] = {
 		.resume		= genphy_resume,
 		.read_page	= rtl821x_read_page,
 		.write_page	= rtl821x_write_page,
+	}, {
+		.phy_id		= 0x001cc961,
+		.name		= "RTL8366RB Gigabit Ethernet",
+		.phy_id_mask	= 0x001fffff,
+		.features	= PHY_GBIT_FEATURES,
+		.flags		= PHY_HAS_INTERRUPT,
+		.config_init	= &rtl8366rb_config_init,
+		.suspend	= genphy_suspend,
+		.resume		= genphy_resume,
 	},
 };
 
@@ -283,6 +313,7 @@ static struct mdio_device_id __maybe_unused realtek_tbl[] = {
 	{ 0x001cc914, 0x001fffff },
 	{ 0x001cc915, 0x001fffff },
 	{ 0x001cc916, 0x001fffff },
+	{ 0x001cc961, 0x001fffff },
 	{ }
 };
 
-- 
2.39.5