diff options
authorStefan Agner <>2016-02-10 14:43:03 -0800
committerStefan Agner <>2016-03-24 11:24:20 -0700
commit6f2d07dfdc82b7509ceebfb26647cf967b323071 (patch)
parent539eb164ff4e64f4cc824437e9c96e71c526f1fb (diff)
phy: micrel: do not use power down mode
Some Micrel KSZ8041NL PHY chips exhibit continous RX errors after using the power down mode bit (0.11). If the PHY is taken out of power down mode in a certain temperature range, the PHY enters a weird state which leads to continously reporting RX errors. In that state, the MAC is not able to receive or send any Ethernet frames and the activity LED is constantly blinking. Since Linux is using the suspend callback when the interface is taken down, ending up in that state can easily happen during a normal startup. Micrel confirmed the issue, caused by abnormal clock recovery when using power down mode. Even the latest revision (A4, Revision ID 0x1513) seems to suffer that problem. Remove the suspend/resume callback to avoid using the power down mode completely. Signed-off-by: Stefan Agner <>
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index e13ad6cdcc22..d691b72edb57 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -693,8 +693,6 @@ static struct phy_driver ksphy_driver[] = {
.read_status = genphy_read_status,
.ack_interrupt = kszphy_ack_interrupt,
.config_intr = kszphy_config_intr,
- .suspend = genphy_suspend,
- .resume = genphy_resume,
.driver = { .owner = THIS_MODULE,},
}, {
.phy_id = PHY_ID_KSZ8041RNLI,