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Subject[PATCH 5.1 09/62] net: dsa: mv88e6xxx: wait after reset deactivation
Date
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)

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