net: dsa: microchip: ksz9477: Add Wake on Magic Packet support

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Introduce Wake on Magic Packet (WoL) functionality to the ksz9477
driver.

Major changes include:

1. Extending the `ksz9477_handle_wake_reason` function to identify Magic
   Packet wake events alongside existing wake reasons.

2. Updating the `ksz9477_get_wol` and `ksz9477_set_wol` functions to
   handle WAKE_MAGIC alongside the existing WAKE_PHY option, and to
   program the switch's MAC address register accordingly when Magic
   Packet wake-up is enabled. This change will prevent WAKE_MAGIC
   activation if the related port has a different MAC address compared
   to a MAC address already used by HSR or an already active WAKE_MAGIC
   on another port.

3. Adding a restriction in `ksz_port_set_mac_address` to prevent MAC
   address changes on ports with active Wake on Magic Packet, as the
   switch's MAC address register is utilized for this feature.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20231026051051.2316937-2-o.rempel@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

...

This commit is contained in:

Oleksij Rempel 2023-10-26 07:10:47 +02:00 • committed by Jakub Kicinski

parent 3a04927f8d

commit 3b454b6390

3 changed files with 97 additions and 7 deletions

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57

drivers/net/dsa/microchip/ksz9477.c

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43

drivers/net/dsa/microchip/ksz_common.c

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4

drivers/net/dsa/microchip/ksz_common.h

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