net: dsa: mv88e6xxx: Don't force link when using in-band-status

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When a port is configured with 'managed = "in-band-status"' switch chips
like the 88E6390 need to propagate the SERDES link state to the MAC
because the link state is not correctly detected. This causes problems
on the 88E6185/88E6097 where the link partner won't see link state
changes because we're forcing the link.

To address this introduce a new device specific op port_sync_link() and
push the logic from mv88e6xxx_mac_link_up() into that. Provide an
implementation for the 88E6185 like devices which doesn't force the
link.

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

...

This commit is contained in:

Chris Packham 2020-11-24 17:34:37 +13:00 • committed by Jakub Kicinski

parent 0f614511fa

commit 4efe766290

4 changed files with 74 additions and 4 deletions

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35

drivers/net/dsa/mv88e6xxx/chip.c

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4

drivers/net/dsa/mv88e6xxx/chip.h

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36

drivers/net/dsa/mv88e6xxx/port.c

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3

drivers/net/dsa/mv88e6xxx/port.h

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