kernel/linux.git/drivers/net/dsa/microchip, branch v7.2-rc1

net: dsa: microchip: implement port_teardown only if needed

2026-06-13T01:08:08+00:00

The port_teardown() operation is optional. Yet, it is implemented by all the KSZ switches through a common function that doesn't do anything for the switches that aren't part of the ksz9477 family Remove the implementation from the switches that don't need it. Implement instead a ksz9477-specific port_teardown. Signed-off-by: Bastien Curutchet (Schneider Electric) Link: https://patch.msgid.link/20260608-clean-ksz-3rd-v2-10-6e61b7be23c4@bootlin.com Signed-off-by: Jakub Kicinski

net: dsa: microchip: implement lan937x-specific MDIO registration

2026-06-13T01:08:08+00:00

All the switches use a common mdio_register() function that uses two ksz_dev_ops callbacks (.mdio_bus_preinit() and .create_phy_addr_map()) to handle the lan937x specific case. These two callbacks are used only at this place in the code. Implement a new lan937x-specific MDIO registration functions that uses these two lan937x-specific functions. The lan937x bindings don't have any 'interrupts' property so this lan937x_mdio_register() doesn't call ksz_irq_phy_setup(). Expose the common ksz_*_mdio_{read/write} functions so they can be used in lan937x.c Remove the callbacks from ksz_dev_ops. Signed-off-by: Bastien Curutchet (Schneider Electric) Link: https://patch.msgid.link/20260608-clean-ksz-3rd-v2-9-6e61b7be23c4@bootlin.com Signed-off-by: Jakub Kicinski

net: dsa: microchip: implement port_hsr_join for KSZ9477 only

2026-06-13T01:08:07+00:00

All switches implement the optional .port_hsr_join operation while only the KSZ9477 truly supports it. Remove the common port_hsr_join implementation. Replace it with a specific implementation for the KSZ9477 case. Signed-off-by: Bastien Curutchet (Schneider Electric) Link: https://patch.msgid.link/20260608-clean-ksz-3rd-v2-8-6e61b7be23c4@bootlin.com Signed-off-by: Jakub Kicinski

net: dsa: microchip: implement .{get/set}_wol only if needed

2026-06-13T01:08:07+00:00

All the KSZ switches use common {get/set}_wol operations while only the ksz9477 and the ksz87xx families really support it. These operations are optional so there is no point implementing them to return -EOPNOTSUPP. Remove the {get/set}_wol callbacks from the switch operations for the ksz88xx, the ksz8463 and the lan937x families. Remove the family check from the common {get/set}_wol implementation. Note that is_ksz9477() is only true for the KSZ9477 so this change will also add WoL support for the other switches using the ksz9477_switch_ops. I checked their datasheet, they implement the same PME_WOL registers, at the same addresses, so this should go fine. Modify the ksz_wol_pre_shutdown() initial check to ensure consistency in the WoL handling for these non-KSZ9477 switches using ksz9477_switch_ops. Signed-off-by: Bastien Curutchet (Schneider Electric) Link: https://patch.msgid.link/20260608-clean-ksz-3rd-v2-7-6e61b7be23c4@bootlin.com Signed-off-by: Jakub Kicinski

net: dsa: microchip: implement .support_eee() only if needed

2026-06-13T01:08:07+00:00

The .support_eee() operation is optional. Yet, it is implemented by the KSZ switches through a common functon that reports false for every chip except for KSZ8563, KSZ9563 and KSZ9893 from the KSZ9477 family. Remove the implementation from the switches that don't support EEE. Also remove .set_mac_eee() for them as .set_mac_eee() is gated by the `support_eee` presence in the core. Implement instead a ksz9477-specific support_eee for these three supported switches. Note that comment /* KSZ879x/KSZ877x/KSZ876x Errata DS80000687C Module 2 */ is completely removed because it concerns the KSZ87xx family that doesn't support at all EEE. Signed-off-by: Bastien Curutchet (Schneider Electric) Link: https://patch.msgid.link/20260608-clean-ksz-3rd-v2-6-6e61b7be23c4@bootlin.com Signed-off-by: Jakub Kicinski

net: dsa: microchip: remove setup_rgmii_delay() KSZ operation

2026-06-13T01:08:07+00:00

setup_rgmii_delay() operation is only used once during the common phylink MAC configuration. Only the lan937x switch implements this setup_rgmii_delay(). Remove the setup_rgmii_delay operation from ksz_dev_ops. Implement a lan937x-specific phylink MAC configuration that does this RGMII delay setup. Export ksz_set_xmii since it's needed by the lan937x implementation. Signed-off-by: Bastien Curutchet (Schneider Electric) Link: https://patch.msgid.link/20260608-clean-ksz-3rd-v2-5-6e61b7be23c4@bootlin.com Signed-off-by: Jakub Kicinski

net: dsa: microchip: wrap the MAC configuration checks in a function

2026-06-13T01:08:07+00:00

The common .mac_config() implementation checks some conditions before doing any register access. As this common implementation is about to be split in the upcoming patch, these checks would lead to code duplication. Wrap all the checks in a need_config() function that returns true when the driver really need to access the switch registers to configure the MAC. Signed-off-by: Bastien Curutchet (Schneider Electric) Link: https://patch.msgid.link/20260608-clean-ksz-3rd-v2-4-6e61b7be23c4@bootlin.com Signed-off-by: Jakub Kicinski

net: dsa: microchip: implement get_phy_flags only if needed

2026-06-13T01:08:07+00:00

The common ksz_get_phy_flags() is used by all the switches to implement the optional .get_phy_flags DSA operation. It always returns 0 except for KSZ88X3 switches where an errata has to be handled. Make ksz_get_phy_flags() ksz88xx-specific. Remove the get_phy_flags implementation for the switches that don't need it. Signed-off-by: Bastien Curutchet (Schneider Electric) Link: https://patch.msgid.link/20260608-clean-ksz-3rd-v2-3-6e61b7be23c4@bootlin.com Signed-off-by: Jakub Kicinski

net: dsa: microchip: remove VLAN operations for ksz8463

2026-06-13T01:08:06+00:00

KSZ8463 uses the common KSZ8 implementation for its VLAN operations. This implementation returns -ENOTSUPP for the KSZ8463 case, which is pointless. Remove the VLAN operations from the ksz8463_switch_ops so the core can directly return -ENOTSUPP. Signed-off-by: Vladimir Oltean Signed-off-by: Bastien Curutchet (Schneider Electric) Link: https://patch.msgid.link/20260608-clean-ksz-3rd-v2-2-6e61b7be23c4@bootlin.com Signed-off-by: Jakub Kicinski

net: dsa: microchip: remove useless common cls_flower_{add/del} operations

2026-06-13T01:08:06+00:00

All the KSZ switches share a common implementation of the cls_flower_{add/del} operations. These common implementations return ksz9477-specific implementations for the KSZ9477 family and -EOPNOTSUPP for the others. -EOPNOTSUPP is already returned by the DSA core when the operation isn't implemented. Remove the common implementations. Directly link the ksz9477_cls_flower_{add/del}() to the KSZ9477 callback. Signed-off-by: Bastien Curutchet (Schneider Electric) Link: https://patch.msgid.link/20260608-clean-ksz-3rd-v2-1-6e61b7be23c4@bootlin.com Signed-off-by: Jakub Kicinski