net: dsa: microchip: Implement recommended reset timing

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The datasheet for the ksz9893 and ksz9477 switches recommend waiting at
least 100us after the de-assertion of reset before trying to program the
device through any interface.

Also switch the existing msleep() call to usleep_range() as recommended
in Documentation/timers/timers-howto.rst. The 2ms range used here is
somewhat arbitrary, as long as the reset is asserted for at least 10ms
we should be ok.

Signed-off-by: Paul Barker <pbarker@konsulko.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Paul Barker 2020-09-09 11:04:17 +01:00 • committed by David S. Miller

parent ade64eb5be

commit 5b79798090

1 changed files with 2 additions and 1 deletions

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drivers/net/dsa/microchip/ksz_common.c

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