generic: RTL8366S/RB: Fix autonegotiation for the WAN port.

The RTL8366S/RB support connecting a second mac to it and using the 5th
port as an independent phy. Therefore we need to handle autonegotiation
changes for phy 4 like on a single phy device.

This fixes #7980, verified on a WNDR3700.

Signed-off-by: Jonas Gorski <jonas.gorski+openwrt@gmail.com>

SVN-Revision: 23127

target/linux/generic/files/drivers/net/phy/rtl8366rb.c

@@ -26,6 +26,7 @@
 #define RTL8366RB_PHY_NO_MAX	4
 #define RTL8366RB_PHY_PAGE_MAX	7
 #define RTL8366RB_PHY_ADDR_MAX	31
+#define RTL8366RB_PHY_WAN	4
 
 /* Switch Global Configuration register */
 #define RTL8366RB_SGCR				0x0000
@@ -1272,6 +1273,10 @@ static int rtl8366rb_phy_config_init(struct phy_device *phydev)
 
 static int rtl8366rb_phy_config_aneg(struct phy_device *phydev)
 {
+	/* phy 4 might be connected to a second mac, allow aneg config */
+	if (phydev->addr == RTL8366RB_PHY_WAN)
+		return genphy_config_aneg(phydev);
+
 	return 0;
 }
 

target/linux/generic/files/drivers/net/phy/rtl8366s.c

@@ -25,6 +25,7 @@
 #define RTL8366S_PHY_NO_MAX	4
 #define RTL8366S_PHY_PAGE_MAX	7
 #define RTL8366S_PHY_ADDR_MAX	31
+#define RTL8366S_PHY_WAN	4
 
 /* Switch Global Configuration register */
 #define RTL8366S_SGCR				0x0000
@@ -1090,6 +1091,10 @@ static int rtl8366s_phy_config_init(struct phy_device *phydev)
 
 static int rtl8366s_phy_config_aneg(struct phy_device *phydev)
 {
+	/* phy 4 might be connected to a second mac, allow aneg config */
+	if (phydev->addr == RTL8366S_PHY_WAN)
+		return genphy_config_aneg(phydev);
+
 	return 0;
 }