net: systemport: fix UniMAC reset logic

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The UniMAC CMD_SW_RESET bit is not a self-clearing bit, so we need to
assert it, wait a bit and clear it manually. As a result, umac_reset()
is updated not to return any value. The previous version of the code
simply wrote 0 to the CMD register, which would make the busy-waiting
loop exit immediately, having zero effect.

By writing 0 to the CMD register, we were clearing all bits in the CMD
register, and not using the hardware reset default values which are
set on purpose.

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

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Florian Fainelli 2014-06-26 10:06:45 -07:00 • committed by David S. Miller

parent 3b140a6788

commit 412bce83ac

1 changed files with 9 additions and 24 deletions

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33

drivers/net/ethernet/broadcom/bcmsysport.c

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