The ethernet controller of SG2044 is Synopsys DesignWare IP with
custom clock. Add glue layer for it.

Changed from v4:
- https://lore.kernel.org/netdev/20250209013054.816580-1-inochiama@gmail.com/
1. apply Romain's tag
2. patch 3: use device variable to replace &pdev->dev.
3. patch 3: remove unused include.
4. patch 3: make error message more useful.

Changed from v3:
- https://lore.kernel.org/netdev/20241223005843.483805-1-inochiama@gmail.com/
1. rebase for 6.14.rc1
2. remove the dependency requirement as it was already merged
   into master.

Changed from RFC:
- https://lore.kernel.org/netdev/20241101014327.513732-1-inochiama@gmail.com/
1. patch 1: apply Krzysztof' tag

Changed from v2:
- https://lore.kernel.org/netdev/20241025011000.244350-1-inochiama@gmail.com/
1. patch 1: merge the first and the second bindings patch to show the all
            compatible change.
2. patch 2: use of_device_compatible_match helper function to perform check.
2. patch 3: remove unused include and sort the left.
3. patch 3: fix wrong variable usage in sophgo_dwmac_fix_mac_speed
4. patch 3: drop unused variable in the patch.

Changed from v1:
- https://lore.kernel.org/netdev/20241021103617.653386-1-inochiama@gmail.com/
1. patch 2: remove sophgo,syscon as this mac delay is resolved.
2. patch 2: apply all the properties unconditionally.
3. patch 4: remove sophgo,syscon code as this mac delay is resolved.
4. patch 4: use the helper function to compute rgmii clock.
5. patch 4: use remove instead of remove_new for the platform driver.

Inochi Amaoto (3):
  dt-bindings: net: Add support for Sophgo SG2044 dwmac
  net: stmmac: platform: Add snps,dwmac-5.30a IP compatible string
  net: stmmac: Add glue layer for Sophgo SG2044 SoC

 .../devicetree/bindings/net/snps,dwmac.yaml   |   4 +
 .../bindings/net/sophgo,sg2044-dwmac.yaml     | 124 ++++++++++++++++++
 drivers/net/ethernet/stmicro/stmmac/Kconfig   |  11 ++
 drivers/net/ethernet/stmicro/stmmac/Makefile  |   1 +
 .../ethernet/stmicro/stmmac/dwmac-sophgo.c    | 107 +++++++++++++++
 .../ethernet/stmicro/stmmac/stmmac_platform.c |  17 ++-
 6 files changed, 259 insertions(+), 5 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
 create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-sophgo.c

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2.48.1