[PATCH v2 00/11] riscv: Add initial support for Anlogic DR1V90

[Junhui Liu <junhui.liu@pigmoral.tech>]

This patch series introduces initial support for the Anlogic DR1V90 SoC
[1] and the Milianke MLKPAI-FS01 [2] board.

The DR1V90 is a RISC-V based FPSoC from Anlogic, featuring a Nuclei
UX900 [3] core as its processing system (PS) and 94,464 LUTs in the
programmable logic (PL) part. The Milianke MLKPAI-FS01 board is one of
the first platforms based on this SoC, with UART1 routed to a Type-C
interface for console access.

Tested on the Milianke MLKPAI-FS01 board with both the vendor's OpenSBI
and the not-yet-upstreamed mainline OpenSBI [4], as well as the vendor’s
U-Boot. Because the vendor’s OpenSBI is loaded at 0x1f300000, we have
to additionally reserve the DRAM region 0x1fe00000–0x1fffffff to prevent
overlap if using vendor's OpenSBI.

Notice: A "no4lvl" bootarg or dependency patch [5] is currently required
for successful boot on the DR1V90 platform, since the SoC hangs if the
kernel attempts to use unsupported 4-level or 5-level paging modes.

Link: https://www.anlogic.com/product/fpga/saldragon/dr1 [1]
Link: https://www.milianke.com/product-item-104.html [2]
Link: https://nucleisys.com/product/900.php [3]
Link: https://github.com/pigmoral/opensbi/tree/dr1v90 [4]
Link: https://lore.kernel.org/linux-riscv/20250722-satp-from-fdt-v1-0-5ba22218fa5f@pigmoral.tech [5]
---
Changes in v2:
- Add MAINTAINERS entry for the DR1V90 platform
- Remove the riscv,isa property of cpu and reorder propertyies
- Fix clint base address in the dtsi
- Change the memory node to cover the full 512MB RAM in board dts
- Link to v1: https://lore.kernel.org/r/20250721-dr1v90-basic-dt-v1-0-5740c5199c47@pigmoral.tech

---
Junhui Liu (11):
      dt-bindings: vendor-prefixes: Add Anlogic, Milianke and Nuclei
      dt-bindings: riscv: Add Nuclei UX900 compatibles
      dt-bindings: riscv: Add Anlogic DR1V90
      dt-bindings: timer: Add Anlogic DR1V90 CLINT
      dt-bindings: interrupt-controller: Add Anlogic DR1V90 PLIC
      dt-bindings: serial: snps-dw-apb-uart: Add Anlogic DR1V90 uart
      riscv: Add Anlogic SoC famly Kconfig support
      riscv: dts: Add initial Anlogic DR1V90 SoC device tree
      riscv: dts: anlogic: Add Milianke MLKPAI FS01 board
      riscv: defconfig: Enable Anlogic SoC
      MAINTAINERS: Setup support for Anlogic DR1V90 SoC tree

 .../interrupt-controller/sifive,plic-1.0.0.yaml    |  1 +
 .../devicetree/bindings/riscv/anlogic.yaml         | 27 +++++++
 Documentation/devicetree/bindings/riscv/cpus.yaml  |  1 +
 .../bindings/serial/snps-dw-apb-uart.yaml          |  1 +
 .../devicetree/bindings/timer/sifive,clint.yaml    |  1 +
 .../devicetree/bindings/vendor-prefixes.yaml       |  6 ++
 MAINTAINERS                                        |  9 +++
 arch/riscv/Kconfig.socs                            |  5 ++
 arch/riscv/boot/dts/Makefile                       |  1 +
 arch/riscv/boot/dts/anlogic/Makefile               |  2 +
 arch/riscv/boot/dts/anlogic/dr1v90-mlkpai-fs01.dts | 28 +++++++
 arch/riscv/boot/dts/anlogic/dr1v90.dtsi            | 85 ++++++++++++++++++++++
 arch/riscv/configs/defconfig                       |  1 +
 13 files changed, 168 insertions(+)
---
base-commit: 07e27ad16399afcd693be20211b0dfae63e0615f
change-id: 20250710-dr1v90-basic-dt-352e9ae5acb8

Best regards,
-- 
Junhui Liu <junhui.liu@pigmoral.tech>