net: dsa: mv88e6xxx: Increase wait after reset deactivation

[ Upstream commit 3c27f3d53d588618d81d30d6712459a3cc9489b8 ]

A switch held in reset by default needs to wait longer until we can
reliably detect it.

An issue was observed when testing on the Marvell 88E6393X (Link Street).
The driver failed to detect the switch on some upstarts. Increasing the
wait time after reset deactivation solves this issue.

The updated wait time is now also the same as the wait time in the
mv88e6xxx_hardware_reset function.

Fixes: 7b75e49de424 ("net: dsa: mv88e6xxx: wait after reset deactivation")
Signed-off-by: Andreas Svensson <andreas.svensson@axis.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20230530145223.1223993-1-andreas.svensson@axis.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 3a8a49b7ec3d955a09307d74b512b03374158db2..393ee145ae0667ccb5d4982b5385b1184eb76886 100644 (file)
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -5096,7 +5096,7 @@ static int mv88e6xxx_probe(struct mdio_device *mdiodev)
                goto out;
        }
        if (chip->reset)
-               usleep_range(1000, 2000);
+               usleep_range(10000, 20000);
 
        err = mv88e6xxx_detect(chip);
        if (err)