From: Baruch Siach baruch@tkos.co.il
[ 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@tkos.co.il Reviewed-by: Andrew Lunn andrew@lunn.ch Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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 @@ -4910,6 +4910,8 @@ 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)