]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
net: dsa: microchip: Implement recommended reset timing
authorPaul Barker <pbarker@konsulko.com>
Wed, 9 Sep 2020 10:04:17 +0000 (11:04 +0100)
committerDavid S. Miller <davem@davemloft.net>
Wed, 9 Sep 2020 18:26:32 +0000 (11:26 -0700)
commit5b797980908ac83a55a3d1ec578382ff60a33551
tree3e5d7a73d395ee8cea1722e2489af0e3c8102439
parentade64eb5be9768e40c90ecb01295416abb2ddbac
net: dsa: microchip: Implement recommended reset timing

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>
drivers/net/dsa/microchip/ksz_common.c