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 <bar...@tkos.co.il>
---
v2: Address Andrew Lunn's comments:
Use usleep_range.
Delay only when reset line is valid.
---
drivers/net/dsa/mv88e6xxx/chip.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index ae750ab9a4d7..5f81d9a3a2a6 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -4910,6 +4910,8 @@ static int mv88e6xxx_probe(struct mdio_device *mdiodev)
err = PTR_ERR(chip->reset);
goto out;
}
+ if (chip->reset)
+ usleep_range(1000, 2000);
err = mv88e6xxx_detect(chip);
if (err)
--
2.20.1
