[PATCH net-next v7 00/15] Add support for Synopsis DWMAC IP on NXP Automotive SoCs S32G2xx/S32G3xx/S32R45

[Jan Petrous via B4 Relay]

The SoC series S32G2xx and S32G3xx feature one DWMAC instance,
the SoC S32R45 has two instances. The devices can use RGMII/RMII/MII
interface over Pinctrl device or the output can be routed
to the embedded SerDes for SGMII connectivity.

The provided stmmac glue code implements only basic functionality,
interface support is restricted to RGMII only. More, including
SGMII/SerDes support will come later.

This patchset adds stmmac glue driver based on downstream NXP git [0].

[0] https://github.com/nxp-auto-linux/linux

v7:
- rebased on v6.13-rc1 and removed RFC prefix
- Link to v6: https://lore.kernel.org/r/20241124-upstream_s32cc_gmac-v6-0-dc5718ccf001@oss.nxp.com

v6:
- removed dead code in dwmac-intel-plat.c
- yaml: fix indention
- validate interface mode in probe
- dropped patch#16 to fit in max 15 patches in series
- Link to v5: https://lore.kernel.org/r/20241119-upstream_s32cc_gmac-v5-0-7dcc90fcffef@oss.nxp.com

v5:
- yaml: refactored compatible string to use fallback
- yaml: fix indention in example
- fix xmas tree formating in local variable declarations
- removed lazy rx clk setup
- drop PTP clock reading patch and replace it with stmmac_platform fix
- Link to v4: https://lore.kernel.org/r/20241028-upstream_s32cc_gmac-v4-0-03618f10e3e2@oss.nxp.com

v4:
- fixed empty commit messages for rgmi_clock() helper patches
- fixed yaml path in MAINTAINERS
- switched to platform_driver::remove() as suggested Uwe
- yaml: returned back all compatibility sting values
- added better commit description for rgmii_clock() helper
- Link to v3: https://lore.kernel.org/r/20241013-upstream_s32cc_gmac-v3-0-d84b5a67b930@oss.nxp.com

v3:
- switched to b4 WoW to overcome threading issue with b4
- extracted the hunk with the typo fix from v2 patch#1 to separate patch
  as Jacob suggested
- removed dead code for RMII/MII support, which will be added alter
- used new rgmii_clock() helper in other stmmac:dwmac glue drivers
- yaml: compatible strings compressed to simple one "nxp,s32-dwmac",
  removed duplicated required properties, already defined in snps,dwmac,
  fixed example

v2:
- send to wider audience as first version missed many maintainers
- created rgmi_clk() helper as Russell suggested (see patch#4)
- address Andrew's, Russell's, Serge's and Simon's comments

Message-ID: <AM9PR04MB85066576AD6848E2402DA354E2832 at AM9PR04MB8506.eurprd04.prod.outlook.com>

Cc: 

Cc: 

Signed-off-by: Jan Petrous (OSS) <jan.petrous at oss.nxp.com>
---
---
Jan Petrous (OSS) (15):
      net: driver: stmmac: Fix CSR divider comment
      net: driver: stmmac: Extend CSR calc support
      net: stmmac: Fix clock rate variables size
      net: phy: Add helper for mapping RGMII link speed to clock rate
      net: dwmac-dwc-qos-eth: Use helper rgmii_clock
      net: dwmac-imx: Use helper rgmii_clock
      net: dwmac-intel-plat: Use helper rgmii_clock
      net: dwmac-rk: Use helper rgmii_clock
      net: dwmac-starfive: Use helper rgmii_clock
      net: macb: Use helper rgmii_clock
      net: xgene_enet: Use helper rgmii_clock
      net: dwmac-sti: Use helper rgmii_clock
      dt-bindings: net: Add DT bindings for DWMAC on NXP S32G/R SoCs
      net: stmmac: dwmac-s32: add basic NXP S32G/S32R glue driver
      MAINTAINERS: Add Jan Petrous as the NXP S32G/R DWMAC driver maintainer

 .../devicetree/bindings/net/nxp,s32-dwmac.yaml     | 105 ++++++++++++
 .../devicetree/bindings/net/snps,dwmac.yaml        |   1 +
 MAINTAINERS                                        |   7 +
 drivers/net/ethernet/apm/xgene/xgene_enet_hw.c     |  16 +-
 drivers/net/ethernet/cadence/macb_main.c           |  14 +-
 drivers/net/ethernet/stmicro/stmmac/Kconfig        |  12 ++
 drivers/net/ethernet/stmicro/stmmac/Makefile       |   1 +
 drivers/net/ethernet/stmicro/stmmac/common.h       |   2 +
 .../ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c    |  11 +-
 drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c    |  15 +-
 .../net/ethernet/stmicro/stmmac/dwmac-intel-plat.c |  22 +--
 .../ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c    |   2 +-
 drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c     |  30 +---
 drivers/net/ethernet/stmicro/stmmac/dwmac-s32.c    | 189 +++++++++++++++++++++
 .../net/ethernet/stmicro/stmmac/dwmac-starfive.c   |  19 +--
 drivers/net/ethernet/stmicro/stmmac/dwmac-sti.c    |  18 +-
 drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c  |   2 +-
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c  |   6 +-
 .../net/ethernet/stmicro/stmmac/stmmac_platform.c  |   2 +-
 include/linux/phy.h                                |  23 +++
 include/linux/stmmac.h                             |  10 +-
 21 files changed, 386 insertions(+), 121 deletions(-)
---
base-commit: 40384c840ea1944d7c5a392e8975ed088ecf0b37
change-id: 20240923-upstream_s32cc_gmac-6891eb75b126

Best regards,
-- 
Jan Petrous (OSS) <jan.petrous at oss.nxp.com>