[PATCH net-next v4 0/2] Add Ethernet MAC support for SpacemiT K1

[Vivian Wang]

SpacemiT K1 has two gigabit Ethernet MACs with RGMII and RMII support.
Add devicetree bindings and driver for it. DTS changes will be submitted
separately.

Tested on BananaPi BPI-F3 and Milk-V Jupiter.

I would like to note that even though some bit field names superficially
resemble that of DesignWare MAC, all other differences point to it in
fact being a custom design.

Based on SpacemiT drivers [1].

For convenience of testing, these patches and related DTS changes are
also available at:

https://github.com/dramforever/linux/tree/k1/ethernet/v4

[1]: https://github.com/spacemit-com/linux-k1x

---
Changes in v4:
- Resource handling on probe and remove: timer_delete_sync and
  of_phy_deregister_fixed_link
- Drop DTS changes and dependencies (will send through SpacemiT tree)
- Minor changes:
  - Remove redundant phy_stop() and setting of ndev->phydev
  - Fix error checking for emac_open in emac_resume
  - Fix one missed dev_err -> dev_err_probe
  - Fix type of emac_start_xmit
  - Fix one missed reverse xmas tree formatting
  - Rename some functions for consistency between emac_* and ndo_*
- Link to v3: https://lore.kernel.org/r/20250702-net-k1-emac-v3-0-882dc55404f3@xxxxxxxxxxx

Changes in v3:
- Refactored and simplified emac_tx_mem_map
- Addressed other minor v2 review comments
- Removed what was patch 3 in v2, depend on DMA buses instead
- DT nodes in alphabetical order where appropriate
- Link to v2: https://lore.kernel.org/r/20250618-net-k1-emac-v2-0-94f5f07227a8@xxxxxxxxxxx

Changes in v2:
- dts: Put eth0 and eth1 nodes under a bus with dma-ranges
- dts: Added Milk-V Jupiter
- Fix typo in emac_init_hw() that broke the driver (Oops!)
- Reformatted line lengths to under 80
- Addressed other v1 review comments
- Link to v1: https://lore.kernel.org/r/20250613-net-k1-emac-v1-0-cc6f9e510667@xxxxxxxxxxx

---
Vivian Wang (2):
      dt-bindings: net: Add support for SpacemiT K1
      net: spacemit: Add K1 Ethernet MAC

 .../devicetree/bindings/net/spacemit,k1-emac.yaml  |   81 +
 drivers/net/ethernet/Kconfig                       |    1 +
 drivers/net/ethernet/Makefile                      |    1 +
 drivers/net/ethernet/spacemit/Kconfig              |   29 +
 drivers/net/ethernet/spacemit/Makefile             |    6 +
 drivers/net/ethernet/spacemit/k1_emac.c            | 1891 ++++++++++++++++++++
 drivers/net/ethernet/spacemit/k1_emac.h            |  420 +++++
 7 files changed, 2429 insertions(+)
---
base-commit: d9946fe286439c2aeaa7953b8c316efe5b83d515
change-id: 20250606-net-k1-emac-3e181508ea64

Best regards,
-- 
Vivian "dramforever" Wang