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[00/10] arm64 support for Milk-V Duo Module 01 EVB

Message ID 20250209220646.1090868-1-alexander.sverdlin@gmail.com
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Series arm64 support for Milk-V Duo Module 01 EVB | expand

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Alexander Sverdlin Feb. 9, 2025, 10:06 p.m. UTC 
This series adds very basic support for Milk-V Duo Module 01 EVB [1] in
arm64 mode. The SoC (SG2000) is dual-arch, RiscV and ARM64, the latter has
been chosen because the upstream toolchain can be utilized.

Sophgo SG2000 seems to be a continuation of the Cvitek CV18xx series, same
peripherals with an addition of ARM64 core. Therefore it would be
beneficial not to copy-paste the peripherals' device-tree, but rather split
the most suitable riscv DT into ARCH-specific and peripherals parts and
just include the latter on the arm64 side.

This series adds the device-tree for Milk-V Duo Module 01 EVB, which
in turn contains Milk-V Duo Module 01 (separate .dtsi) on it, which has
SG2000 SoC inside (separate .dtsi).

This series has been tested with Sophgo-provided U-Boot binary [2]: it
boots from SD card, pinctrl, serial, GPIO drivers are functional (same
as for RiscV-based CV18xx SoCs).
New reset driver is provided as an alternative to the ATF PSCI handler,
which Sophgo only provides in binary form.

Partial SoC documentation is available [3].

This series lacks the support of:
- USB
- Audio
- Ethernet
- WiFi
- Bluetooth
- eMMC
- Video

It would probably make sense that the whole series would go into SOC tree,
even though technically nothing prevents the reboot/reset driver to come
in PM/reset tree. If everything would come together, `reboot` command would
work out of the box.

[1] https://milkv.io/docs/duo/getting-started/duo-module-01
[2] https://github.com/milkv-duo/duo-buildroot-sdk-v2/releases/
[3] https://github.com/sophgo/sophgo-doc/releases/download/sg2000-trm-v1.01/sg2000_trm_en.pdf

Alexander Sverdlin (10):
  arm64: Add SOPHGO SOC family Kconfig support
  riscv: dts: sophgo: cv18xx: Split into CPU core and peripheral parts
  arm64: dts: sophgo: Add initial SG2000 SoC device tree
  arm64: dts: sophgo: Add Duo Module 01
  arm64: dts: sophgo: Add Duo Module 01 Evaluation Board
  dt-bindings: mfd: syscon: Add Cvitek CV18xx rtcsys core and ctrl
    compatible
  dt-bindings: reset: sophgo: Add CV18xx reset controller
  riscv/arm64: dts: cv18xx: Add sysctl and reset nodes
  power: reset: cv18xx: New driver
  arm64: defconfig: Enable rudimentary Sophgo SG2000 support

 .../devicetree/bindings/mfd/syscon.yaml       |   4 +
 .../bindings/reset/sophgo,cv1800-reset.yaml   |  38 ++
 MAINTAINERS                                   |   1 +
 arch/arm64/Kconfig.platforms                  |  12 +
 arch/arm64/boot/dts/Makefile                  |   1 +
 arch/arm64/boot/dts/sophgo/Makefile           |   2 +
 arch/arm64/boot/dts/sophgo/sg2000.dtsi        |  79 +++++
 .../sophgo/sg2000_milkv_duo_module_01.dtsi    |  84 +++++
 .../sophgo/sg2000_milkv_duo_module_01_evb.dts |  30 ++
 arch/arm64/configs/defconfig                  |   3 +
 arch/riscv/boot/dts/sophgo/cv181x.dtsi        |   2 +-
 arch/riscv/boot/dts/sophgo/cv18xx-periph.dtsi | 329 ++++++++++++++++++
 arch/riscv/boot/dts/sophgo/cv18xx.dtsi        | 305 +---------------
 drivers/power/reset/Kconfig                   |  12 +
 drivers/power/reset/Makefile                  |   1 +
 drivers/power/reset/cv18xx-reset.c            |  89 +++++
 16 files changed, 689 insertions(+), 303 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/reset/sophgo,cv1800-reset.yaml
 create mode 100644 arch/arm64/boot/dts/sophgo/Makefile
 create mode 100644 arch/arm64/boot/dts/sophgo/sg2000.dtsi
 create mode 100644 arch/arm64/boot/dts/sophgo/sg2000_milkv_duo_module_01.dtsi
 create mode 100644 arch/arm64/boot/dts/sophgo/sg2000_milkv_duo_module_01_evb.dts
 create mode 100644 arch/riscv/boot/dts/sophgo/cv18xx-periph.dtsi
 create mode 100644 drivers/power/reset/cv18xx-reset.c