Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 135/223] net: dsa: mv88e6xxx: wait after reset deactivation | Date | Fri, 2 Aug 2019 11:36:00 +0200 |
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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 @@ -3846,6 +3846,8 @@ static int mv88e6xxx_probe(struct mdio_d mv88e6xxx_mdio_unregister(chip); return err; } + if (chip->reset) + usleep_range(1000, 2000); return 0; }
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