[PATCH RFC 00/24] ARM: zte: Add support for Sanechips ZX279128S and ZTE ZXHN H3600

[Navid Ghahremani]

This series introduces mainline Linux support for the Sanechips (ZTE)
ZX279128S SoC and the ZTE ZXHN H3600 Wi-Fi 6 router.

The ZX279128S is a dual-core ARM Cortex-A9 network SoC with an ARM PL310 /
L2C-310 outer cache controller, dual PCIe interfaces, a 5-port Gigabit
Ethernet switch with hardware packet classification and flow offload,
SPI-NAND flash controller, and DWC3 USB 2.0 host.

This submission establishes Navid Ghahremani as the maintainer for
ARM/ZTE ZX279128S SOC SUPPORT in MAINTAINERS.

Series breakdown:
- Patches 01-03: Outer cache read serialization mechanism to prevent
  bus deadlock between outstanding PCIe device reads and L2C-310 cache
  sync operations.
- Patches 04-05: SoC platform integration, SMP CPU hotplug trampoline,
  and MAINTAINERS entry.
- Patches 06-11: Core peripheral drivers: CRM clock/reset controller,
  GPIO, pinctrl-single bindings, and syscon.
- Patches 12-13: DesignWare PCIe host controller driver for the dual
  MT7915 Wi-Fi links with shared reset sequencing.
- Patches 14-18: Networking: MDIO bus controller, ZX5201 Gigabit PHY,
  and Gigabit Ethernet switch driver with switchdev and hardware flow
  offload integration.
- Patches 19-20: SPI flash controller driver using the Linux SPI-MEM
  framework.
- Patches 21-22: Synopsys DWC3 USB platform glue binding and enablement.
- Patches 23-24: Device tree descriptions for the ZX279128S SoC and
  ZTE ZXHN H3600 board.

Hardware testing:
- Validated on physical ZTE ZXHN H3600 hardware via U-Boot TFTP boot.
- Dual-core SMP, CPU hotplug, and thermal sensors operational.
- Dual-band MT7915 2.4/5 GHz Wi-Fi links initialized and stable.
- Gigabit Ethernet switch verified at line-rate 1 Gbps forwarding.
- SPI-NAND flash persistence and USB 2.0 host verified.

Independent prerequisites sent separately:
- MTD: heyangtek bad block marker reserve byte fix.
- NVMEM: fixed-layout mac-base consumer offset support.

Navid Ghahremani (24):
  dt-bindings: cache: l2c2x0: Describe ZTE device-read serialization
  ARM: l2c: Serialize device reads with cache maintenance when requested
  wifi: mt76: Serialize MMIO reads with outer cache maintenance
  dt-bindings: arm: Add ZTE ZX279128S platform descriptions
  ARM: zte: Add ZX279128S platform and CPU hotplug support
  dt-bindings: clock: Add ZTE ZX279128S CRM clocks and resets
  clk: zte: Add ZX279128S CRM clock and reset driver
  dt-bindings: gpio: Add ZTE ZX279128S GPIO controller
  gpio: Add ZTE ZX279128S GPIO driver
  dt-bindings: pinctrl: pinctrl-single: Add ZTE ZX279128S pin mux
  dt-bindings: mfd: syscon: Add ZX279128S system controller
  dt-bindings: PCI: Add ZTE ZX279128S host controller
  PCI: dwc: Add ZTE ZX279128S host controller driver
  dt-bindings: net: Add ZTE ZX279128S MDIO controller
  net: mdio: Add ZTE ZX279128S MDIO controller
  net: phy: Add Sanechips ZX5201 PHY support
  dt-bindings: net: Add ZTE ZX279128S Ethernet switch
  net: ethernet: zte: Add ZX279128S Ethernet switch driver
  dt-bindings: spi: Add ZTE ZX279128S SPI flash controller
  spi: Add ZTE ZX279128S SPI flash controller
  dt-bindings: usb: Add ZTE ZX279128S DWC3 controller
  usb: dwc3: generic-plat: Add ZTE ZX279128S
  ARM: dts: zte: Add ZX279128S SoC description
  ARM: dts: zte: Add ZTE ZXHN H3600 board

 .../devicetree/bindings/arm/cpus.yaml         |    1 +
 .../devicetree/bindings/arm/zte.yaml          |    8 +-
 .../devicetree/bindings/cache/l2c2x0.yaml     |    9 +
 .../bindings/clock/zte,zx279128s-crm.yaml     |  141 ++
 .../bindings/gpio/zte,zx279128s-gpio.yaml     |   53 +
 .../devicetree/bindings/mfd/syscon.yaml       |    1 +
 .../bindings/net/zte,zx279128s-gmac.yaml      |  108 ++
 .../bindings/net/zte,zx279128s-mdio.yaml      |   67 +
 .../bindings/pci/zte,zx279128s-pcie.yaml      |   97 ++
 .../bindings/pinctrl/pinctrl-single.yaml      |    1 +
 .../bindings/spi/zte,zx279128s-spifc.yaml     |   69 +
 .../devicetree/bindings/sram/sram.yaml        |    1 +
 .../bindings/usb/zte,zx279128s-dwc3.yaml      |   76 +
 MAINTAINERS                                   |   22 +
 arch/arm/boot/dts/zte/Makefile                |    2 +
 .../boot/dts/zte/zx279128s-zte-zxhn-h3600.dts |  361 ++++
 arch/arm/boot/dts/zte/zx279128s.dtsi          |  397 +++++
 arch/arm/include/asm/outercache.h             |   22 +
 arch/arm/mach-zte/Kconfig                     |   17 +
 arch/arm/mach-zte/Makefile                    |    4 +
 arch/arm/mach-zte/platsmp-zx279128s.c         |  173 ++
 arch/arm/mach-zte/zx279128s.c                 |   19 +
 arch/arm/mm/Kconfig                           |   14 +
 arch/arm/mm/cache-l2x0.c                      |   81 +
 drivers/clk/Kconfig                           |    1 +
 drivers/clk/Makefile                          |    1 +
 drivers/clk/zte/Kconfig                       |   14 +
 drivers/clk/zte/Makefile                      |    2 +
 drivers/clk/zte/clk-zx279128s.c               |  460 +++++
 drivers/gpio/Kconfig                          |   12 +
 drivers/gpio/Makefile                         |    1 +
 drivers/gpio/gpio-zx279128s.c                 |   78 +
 drivers/net/ethernet/zte/Kconfig              |   13 +
 drivers/net/ethernet/zte/Makefile             |    3 +
 drivers/net/ethernet/zte/zx279128s-eth.h      |  385 +++++
 drivers/net/ethernet/zte/zx279128s-main.c     | 1485 +++++++++++++++++
 drivers/net/ethernet/zte/zx279128s-ppe.c      |  803 +++++++++
 drivers/net/ethernet/zte/zx279128s-switch.c   |  339 ++++
 drivers/net/mdio/Kconfig                      |   11 +
 drivers/net/mdio/Makefile                     |    1 +
 drivers/net/mdio/mdio-zx279128s.c             |  158 ++
 drivers/net/phy/Kconfig                       |    8 +
 drivers/net/phy/Makefile                      |    1 +
 drivers/net/phy/sanechips.c                   |  153 ++
 drivers/net/wireless/mediatek/mt76/dma.h      |    2 +-
 drivers/net/wireless/mediatek/mt76/mmio.c     |    6 +-
 drivers/net/wireless/mediatek/mt76/mt76.h     |   23 +
 .../net/wireless/mediatek/mt76/mt76x02_mmio.c |    2 +-
 .../net/wireless/mediatek/mt76/mt7915/pci.c   |    2 +-
 drivers/pci/controller/dwc/Kconfig            |   12 +
 drivers/pci/controller/dwc/Makefile           |    1 +
 drivers/pci/controller/dwc/pcie-zx279128s.c   |  322 ++++
 drivers/spi/Kconfig                           |   13 +
 drivers/spi/Makefile                          |    1 +
 drivers/spi/spi-zx279128s-spifc.c             |  353 ++++
 drivers/usb/dwc3/Kconfig                      |    2 +-
 drivers/usb/dwc3/dwc3-generic-plat.c          |    1 +
 include/dt-bindings/clock/zte,zx279128s-crm.h |   55 +
 58 files changed, 6460 insertions(+), 8 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/clock/zte,zx279128s-crm.yaml
 create mode 100644 Documentation/devicetree/bindings/gpio/zte,zx279128s-gpio.yaml
 create mode 100644 Documentation/devicetree/bindings/net/zte,zx279128s-gmac.yaml
 create mode 100644 Documentation/devicetree/bindings/net/zte,zx279128s-mdio.yaml
 create mode 100644 Documentation/devicetree/bindings/pci/zte,zx279128s-pcie.yaml
 create mode 100644 Documentation/devicetree/bindings/spi/zte,zx279128s-spifc.yaml
 create mode 100644 Documentation/devicetree/bindings/usb/zte,zx279128s-dwc3.yaml
 create mode 100644 arch/arm/boot/dts/zte/zx279128s-zte-zxhn-h3600.dts
 create mode 100644 arch/arm/boot/dts/zte/zx279128s.dtsi
 create mode 100644 arch/arm/mach-zte/platsmp-zx279128s.c
 create mode 100644 arch/arm/mach-zte/zx279128s.c
 create mode 100644 drivers/clk/zte/Kconfig
 create mode 100644 drivers/clk/zte/Makefile
 create mode 100644 drivers/clk/zte/clk-zx279128s.c
 create mode 100644 drivers/gpio/gpio-zx279128s.c
 create mode 100644 drivers/net/ethernet/zte/zx279128s-eth.h
 create mode 100644 drivers/net/ethernet/zte/zx279128s-main.c
 create mode 100644 drivers/net/ethernet/zte/zx279128s-ppe.c
 create mode 100644 drivers/net/ethernet/zte/zx279128s-switch.c
 create mode 100644 drivers/net/mdio/mdio-zx279128s.c
 create mode 100644 drivers/net/phy/sanechips.c
 create mode 100644 drivers/pci/controller/dwc/pcie-zx279128s.c
 create mode 100644 drivers/spi/spi-zx279128s-spifc.c
 create mode 100644 include/dt-bindings/clock/zte,zx279128s-crm.h

-- 
2.55.0