Merge branch 'net-atlantic-add-ptp-support-for-aqc113-antigua'

Sukhdeep Singh says:

====================
net: atlantic: add PTP support for AQC113 (Antigua)

This series adds IEEE 1588 PTP support for the AQC113 (Antigua) network
controller. AQC113 is the successor to the existing AQC107 (Atlantic)
chip already supported by the atlantic driver.

AQC113 uses a substantially different hardware architecture for PTP
compared to AQC107:

  - Dual on-chip TSG clocks with direct register access instead of
    PHY-based timestamping via firmware
  - TX timestamps via descriptor writeback instead of firmware mailbox
  - Hardware L3/L4 RX filters for PTP multicast steering with both
    IPv4 and IPv6 support
  - Reference-counted shared filter slots managed through an Action
    Resolver Table (ART), allowing multiple rules to share L3/L4
    hardware filters when their match criteria are identical

The series is structured in four parts:

Patches 1-3 prepare the existing L3/L4 filter path:

  Patch 1 corrects flow_type masking and IPv6 address handling in
  aq_set_data_fl3l4(). Patch 2 moves the active_ipv4/ipv6 bitmap
  updates to after the hardware write succeeds. Patch 3 decouples
  the function from driver-internal structures so it can be called
  directly by the AQC113 PTP filter setup code.

Patches 4-5 add the AQC113 hardware infrastructure:

  Patch 4 adds the low-level register definitions and accessor
  functions. Patch 5 adds filter data structures and firmware
  capability query.

Patches 6-7 implement the AQC113 L2/L3/L4 RX filter management:

  Patch 6 fixes the AQC113 HW init path: ART section selection,
  L2 filter slot assignment, and MAC address programming. Patch 7
  implements the complete L3/L4 RX filter ops including reference-
  counted ART sharing and IPv4/IPv6 steering.

Patches 8-12 add the AQC113 PTP feature:

  Patch 8 reserves the dedicated PTP traffic class buffer and
  configures the TX path. Patch 9 extends the hw_ops interface
  with PTP-specific function pointers and updates AQC107 to the
  new signatures. Patches 10-12 implement the full PTP subsystem:
  Patch 10 adds the hw_atl2 register-level PTP clock ops, Patch 11
  adds TX timestamp polling and PTP TX traffic classification, and
  Patch 12 integrates PTP into aq_ptp and the driver core.

The existing AQC107 PTP implementation is not functionally changed
by this series; AQC113-specific code paths are gated on chip
detection throughout.

Tested on AQC113 at 1G, 2.5G, 5G, and 10G link speeds using
ptp4l/phc2sys with hardware timestamping in both L2 and L4
(IPv4/IPv6) modes.
====================

Link: https://patch.msgid.link/20260610115448.272-1-sukhdeeps@marvell.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>