net: dsa: mv88e6xxx: fully support SERDES on Topaz family

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Currently we support SERDES on the Topaz family in a limited way: no
IRQs and the cmode is not writable, thus the mode is determined by
strapping pins.

Marvell's examples though show how to make cmode writable on port 5 and
support SGMII autonegotiation. It is done by writing hidden registers,
for which we already have code.

This patch adds support for making the cmode for the SERDES port
writable on the Topaz family, via a new chip operation,
.port_set_cmode_writable, which is called from mv88e6xxx_port_setup_mac
just before .port_set_cmode.

SERDES IRQs are also enabled for Topaz.

Tested on Turris Mox.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Vivien Didelot <vivien.didelot@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

This commit is contained in:

Marek Behún 2019-08-26 23:31:55 +02:00 • committed by David S. Miller

parent 3bbb8867f8

commit 7a3007d22e

4 changed files with 79 additions and 6 deletions

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14

drivers/net/dsa/mv88e6xxx/chip.c

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1

drivers/net/dsa/mv88e6xxx/chip.h

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65

drivers/net/dsa/mv88e6xxx/port.c

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5

drivers/net/dsa/mv88e6xxx/port.h

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