From 3697d058b08d5b874f0253de173ef72e5d648f9a Mon Sep 17 00:00:00 2001 From: Heiner Kallweit Date: Sun, 12 Nov 2017 16:16:04 +0100 Subject: [PATCH] net: phy: realtek: fix RTL8211F interrupt mode After commit b94d22d94ad22 "ARM64: dts: meson-gx: add external PHY interrupt on some platforms" ethernet stopped working on my Odroid-C2 which has a RTL8211F phy. It turned out that no interrupts were triggered. Further analysis showed the register INER can't be altered on page 0. Because register INSR needs to be accessed via page 0xa43 I assumed that register INER needs to be accessed via some page too. Some brute force check resulted in page 0xa42 being the right one. With this patch the phy is working properly in interrupt mode. Fixes: 3447cf2e9a11 ("net/phy: Add support for Realtek RTL8211F") Signed-off-by: Heiner Kallweit Tested-by: Jerome Brunet Signed-off-by: David S. Miller --- drivers/net/phy/realtek.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c index d4670ecdb1ba..eda0a6e86918 100644 --- a/drivers/net/phy/realtek.c +++ b/drivers/net/phy/realtek.c @@ -115,11 +115,13 @@ static int rtl8211f_config_intr(struct phy_device *phydev) { int err; + phy_write(phydev, RTL821x_PAGE_SELECT, 0xa42); if (phydev->interrupts == PHY_INTERRUPT_ENABLED) err = phy_write(phydev, RTL821x_INER, RTL8211F_INER_LINK_STATUS); else err = phy_write(phydev, RTL821x_INER, 0); + phy_write(phydev, RTL821x_PAGE_SELECT, 0); return err; }