[PATCH 1/4 RFCv2] net: phy: realtek: Support RTL8366RB variant

[Linus Walleij]

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.sepp...@gmail.com>
Cc: Roman Yeryomin <ro...@advem.lv>
Cc: Colin Leitner <colin.leit...@googlemail.com>
Cc: Gabor Juhos <juh...@openwrt.org>
Cc: Florian Fainelli <f.faine...@gmail.com>
Signed-off-by: Linus Walleij <linus.wall...@linaro.org>
---
ChangeLog RFCv1->RFCv2:
- No real changes.
---
 drivers/net/phy/realtek.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c
index 9f48ecf9c627..21624d1c9d38 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   0x21
+#define RTL8366RB_POWER_SAVE_ON 0x1000
+
 MODULE_DESCRIPTION("Realtek PHY driver");
 MODULE_AUTHOR("Johnson Leung");
 MODULE_LICENSE("GPL");
@@ -145,6 +148,22 @@ static int rtl8211f_config_init(struct phy_device *phydev)
        return phy_modify_paged(phydev, 0xd08, 0x11, RTL8211F_TX_DELAY, val);
 }
 
+static int rtl8366rb_config_init(struct phy_device *phydev)
+{
+       int ret;
+       u16 reg;
+
+       ret = genphy_config_init(phydev);
+       if (ret < 0)
+               return ret;
+
+       reg = phy_read(phydev, RTL8366RB_POWER_SAVE);
+       reg |= RTL8366RB_POWER_SAVE_ON;
+       phy_write(phydev, RTL8366RB_POWER_SAVE, reg);
+
+       return 0;
+}
+
 static struct phy_driver realtek_drvs[] = {
        {
                .phy_id         = 0x00008201,
@@ -207,6 +226,18 @@ static struct phy_driver realtek_drvs[] = {
                .resume         = genphy_resume,
                .read_page      = rtl821x_read_page,
                .write_page     = rtl821x_write_page,
+       }, {
+               /* The main part of this DSA is in drivers/net/dsa */
+               .phy_id         = 0x001cc961,
+               .name           = "RTL8366RB Gigabit Ethernet",
+               .phy_id_mask    = 0x001fffff,
+               .features       = PHY_GBIT_FEATURES,
+               .flags          = PHY_HAS_INTERRUPT,
+               .config_aneg    = &genphy_config_aneg,
+               .config_init    = &rtl8366rb_config_init,
+               .read_status    = &genphy_read_status,
+               .suspend        = genphy_suspend,
+               .resume         = genphy_resume,
        },
 };
 
@@ -218,6 +249,7 @@ static struct mdio_device_id __maybe_unused realtek_tbl[] = 
{
        { 0x001cc914, 0x001fffff },
        { 0x001cc915, 0x001fffff },
        { 0x001cc916, 0x001fffff },
+       { 0x001cc961, 0x001fffff },
        { }
 };
 
-- 
2.17.0