From: Baruch Siach <baruch@xxxxxxxxxx> [ Upstream commit 7b75e49de424ceb53d13e60f35d0a73765626fda ] Add a 1ms delay after reset deactivation. Otherwise the chip returns bogus ID value. This is observed with 88E6390 (Peridot) chip. Signed-off-by: Baruch Siach <baruch@xxxxxxxxxx> Reviewed-by: Andrew Lunn <andrew@xxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/dsa/mv88e6xxx/chip.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/net/dsa/mv88e6xxx/chip.c +++ b/drivers/net/dsa/mv88e6xxx/chip.c @@ -4816,6 +4816,8 @@ static int mv88e6xxx_probe(struct mdio_d err = PTR_ERR(chip->reset); goto out; } + if (chip->reset) + usleep_range(1000, 2000); err = mv88e6xxx_detect(chip); if (err)
