net: phy: realtek: add support for RTL8211C

RTL8211C has an issue when operating in Gigabit slave mode, therefore
genphy driver can't be used. See also this U-boot change.
https://lists.denx.de/pipermail/u-boot/2016-March/249712.html

Add a PHY driver for this chip with the quirk to force Gigabit master
mode. As a note: This will make it impossible to connect two network
ports directly which both are driven by a RTl8211C.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c
index 7b516e5..f8f1278 100644 (file)
--- a/drivers/net/phy/realtek.c
+++ b/drivers/net/phy/realtek.c
@@ -150,6 +150,15 @@ static int rtl8211_config_aneg(struct phy_device *phydev)
        return 0;
 }
 
+static int rtl8211c_config_init(struct phy_device *phydev)
+{
+       /* RTL8211C has an issue when operating in Gigabit slave mode */
+       phy_set_bits(phydev, MII_CTRL1000,
+                    CTL1000_ENABLE_MASTER | CTL1000_AS_MASTER);
+
+       return genphy_config_init(phydev);
+}
+
 static int rtl8211f_config_init(struct phy_device *phydev)
 {
        int ret;
@@ -221,6 +230,14 @@ static struct phy_driver realtek_drvs[] = {
                .suspend        = rtl8211b_suspend,
                .resume         = rtl8211b_resume,
        }, {
+               .phy_id         = 0x001cc913,
+               .name           = "RTL8211C Gigabit Ethernet",
+               .phy_id_mask    = 0x001fffff,
+               .features       = PHY_GBIT_FEATURES,
+               .config_init    = rtl8211c_config_init,
+               .read_mmd       = &genphy_read_mmd_unsupported,
+               .write_mmd      = &genphy_write_mmd_unsupported,
+       }, {
                .phy_id         = 0x001cc914,
                .name           = "RTL8211DN Gigabit Ethernet",
                .phy_id_mask    = 0x001fffff,