During the initialization of PHY the gigabit bit capable is set if the controller is a GEM. However, for sama5d4, the GEM is not gigabit capable. Improperly setting the GBE capability leads to an unresponsive MAC controller. This patch fix this behavior allowing to use the gmac with the sama5d4.
Suggested-by: Nicolas Ferre nicolas.ferre@atmel.com Signed-off-by: Gregory CLEMENT gregory.clement@free-electrons.com --- drivers/net/macb.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/net/macb.c b/drivers/net/macb.c index a5c1880..642717d 100644 --- a/drivers/net/macb.c +++ b/drivers/net/macb.c @@ -480,8 +480,11 @@ static int macb_phy_init(struct macb_device *macb) return 0; }
- /* First check for GMAC */ - if (macb_is_gem(macb)) { + /* + * First check for GMAC, but not the one on SAMA5D4 which is + * not gigabit capabale + */ + if (macb_is_gem(macb) && ! cpu_is_sama5d4()) { lpa = macb_mdio_read(macb, MII_STAT1000);
if (lpa & (LPA_1000FULL | LPA_1000HALF)) {