[PATCH v2 0/5] Add GMAC support for S32 SoC family

[Chester Lin]

Hello,

Here I want to introduce a new patch series, which aims to support GMAC
functions on S32 SoCs, such as S32G2. This series is originally from NXP's
implementation on CodeAurora[1] and it will be required by upstream kernel
to configure platform settings at the DWMAC glue layer before activating
the DWMAC core on different S32G boards. In this patchset I also introduce
more register fields needed by S32 SoCs, such as higher CSR clock ranges
and cache coherency settings. For more information please see NXP's
GMACSUBSYS Reference Manual[2].

Currently, the whole architecture relies on FDTs offered by ATF[3] on
CodeAurora to keep the flexibility of handling multiple S32 platforms since
now S32 clks can be triggered via the ARM SCMI clock protocol and clk IDs/
settings can vary according to different board designs. To ensure that the
driver can work properly, the dt-binding schemas in this patchset is still
required as a reference.

Thanks,
Chester

Changes in v2:
- Fix schema issues.
- Add minItems to clocks & clock-names.
- Replace all sgmii/SGMII terms with pcs/PCS.
  - clock-names: tx_sgmii -> tx_pcs, rx_sgmii -> rx_pcs
- Adjust error handlings while calling devm_clk_get().
- Remove redundant dev_info messages.
- Remove unnecessary if conditions.
- Fix the copyright format suggested by NXP.

[1] https://source.codeaurora.org/external/autobsps32/linux/tree/drivers/net/ethernet/stmicro/stmmac?h=bsp34.0-5.10.120-rt
[2] https://www.nxp.com/webapp/Download?colCode=GMACSUBSYSRM
[3] https://source.codeaurora.org/external/autobsps32/arm-trusted-firmware/tag/?h=bsp34.0-2.5

Chester Lin (5):
  dt-bindings: net: snps, dwmac: add NXP S32CC support
  dt-bindings: net: add schema for NXP S32CC dwmac glue driver
  net: stmmac: Add CSR clock 500Mhz/800Mhz support
  net: stmmac: Add AXI4 ACE control support
  net: stmmac: Add NXP S32 SoC family support

 .../bindings/net/nxp,s32cc-dwmac.yaml         | 135 ++++++++
 .../devicetree/bindings/net/snps,dwmac.yaml   |   5 +-
 drivers/net/ethernet/stmicro/stmmac/Kconfig   |  13 +
 drivers/net/ethernet/stmicro/stmmac/Makefile  |   1 +
 drivers/net/ethernet/stmicro/stmmac/common.h  |   2 +
 .../net/ethernet/stmicro/stmmac/dwmac-s32cc.c | 304 ++++++++++++++++++
 .../net/ethernet/stmicro/stmmac/dwmac4_dma.c  |  10 +
 .../net/ethernet/stmicro/stmmac/dwmac4_dma.h  |   4 +-
 drivers/net/ethernet/stmicro/stmmac/hwif.h    |   5 +
 .../net/ethernet/stmicro/stmmac/stmmac_main.c |   7 +
 include/linux/stmmac.h                        |   9 +
 11 files changed, 492 insertions(+), 3 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/net/nxp,s32cc-dwmac.yaml
 create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-s32cc.c

-- 
2.37.3