[PATCH v5 0/7] riscv: spacemit: Add SpacemiT K3 SoC and K3 Pico-ITX board

[Guodong Xu <guodong@riscstar.com>]

This series introduces basic support for the SpacemiT K3 SoC and the
K3 Pico-ITX evaluation board.

In v5, patches 6-9 (dt-bindings) have been dropped as they were accepted
by Conor and applied to riscv-dt-for-next.

The series has been rebased on linux-next tag: next-20260114.

The SpacemiT K3 is an SoC featuring 8 SpacemiT X100 RISC-V cores.
The X100 is a 4-issue, out-of-order core compliant with the RVA23
profile, targeting high-performance scenarios. [1]

The K3 Pico-ITX is an evaluation board built around the K3 SoC.

From an RVA23 profile compliance perspective, the X100 supports all
mandatory extensions required by RVA23U64 and RVA23S64.

Link: https://www.spacemit.com/en/spacemit-x100-core/ [1]

Changes in v5:
- Patch 1:
   Add Acked-by from Paul.
- Patch 5:
   Add Reviewed-by from Yixun, add Acked-by from Conor.
- Patch 6 (Patch 10 in v4):
   Update the copyright year to 2026.
   Update the commit message.
   Set M-mode maplic and mimsic status to "reserved".
   In maplic node, use riscv,delegation to match kernel binding. OpenSBI
    accepts both delegate and delgation, but the binding documents only
    riscv,delegation.
- Patch 7 (Patch 11 in v4):
   Update the commit message subject line.
   Remove the unused aliases.
   Update the copyright year to 2026.

- Link to v4: https://lore.kernel.org/r/20260110-k3-basic-dt-v4-0-d492f3a30ffa@riscstar.com

Changes in v4:
- Patch 5:
   Adjust maintainers list in alphabetic order.
   Declare spacemit,k3-pico-itx as an enum, which could save future
    code change when adding new boards.
- Patch 10:
   Fix missing blank space after comma in simsic compatible.
   Add m-mode imsic and aplic nodes, per suggestion received from Samuel
    Holland.
   Adjust node properties order in nodes simsic, saplic, mimsic, maplic to
    follow the DTS coding style.

- Link to v3: https://lore.kernel.org/r/20260108-k3-basic-dt-v3-0-ed99eb4c3ad3@riscstar.com

Other Changes in v3 include:
- Patch 1:
   Acked-by: Krzysztof Kozlowski
- Patch 4:
   Acked-by: Krzysztof Kozlowski
- Dropped Patch 5 "dt-bindings: serial: 8250: add SpacemiT K3 UART compatible"
   as it has been applied to tty-next.

- Link to v2: https://lore.kernel.org/r/20251222-k3-basic-dt-v2-0-3af3f3cd0f8a@riscstar.com

Changes in v2:
- Patch 1:
   Fixed alphanumeric sorting order of compatible strings (swapped x100 and
     x60) as per Krzysztof's feedback.
   Update commit message with more information about X100 featurs per
     Yixun's feedback.
- Patch 4:
   Fixed the order to keep things alphabetically.
- Patch 6:
   Use "one blank space" between name and email address.
- Patch 7 ~ 11:
   New patches. Add description of RVA23 mandatory extensions into riscv
    binding YAML file.
- Patch 12 (Patch 7 in v1):
   Removed aliases node.
   Updated 'riscv,isa-extensions' with new extension strings available
- Patch 13 (Patch 8 in v1):
   Updated the memory address to the hardware truth.
   Added aliases node in board dts.
- Patch 1,2,3,5: Add Reviewed-by and Acked-by collected.

Link to v1: https://lore.kernel.org/r/20251216-k3-basic-dt-v1-0-a0d256c9dc92@riscstar.com

Signed-off-by: Guodong Xu <guodong@riscstar.com>
---
Guodong Xu (7):
      dt-bindings: riscv: add SpacemiT X100 CPU compatible
      dt-bindings: timer: add SpacemiT K3 CLINT
      dt-bindings: interrupt-controller: add SpacemiT K3 APLIC
      dt-bindings: interrupt-controller: add SpacemiT K3 IMSIC
      dt-bindings: riscv: spacemit: add K3 and Pico-ITX board bindings
      riscv: dts: spacemit: add initial support for K3 SoC
      riscv: dts: spacemit: add K3 Pico-ITX board support

 .../bindings/interrupt-controller/riscv,aplic.yaml |   1 +
 .../interrupt-controller/riscv,imsics.yaml         |   1 +
 Documentation/devicetree/bindings/riscv/cpus.yaml  |   1 +
 .../devicetree/bindings/riscv/spacemit.yaml        |   5 +
 .../devicetree/bindings/timer/sifive,clint.yaml    |   1 +
 arch/riscv/boot/dts/spacemit/Makefile              |   1 +
 arch/riscv/boot/dts/spacemit/k3-pico-itx.dts       |  29 +
 arch/riscv/boot/dts/spacemit/k3.dtsi               | 590 +++++++++++++++++++++
 8 files changed, 629 insertions(+)
---
base-commit: 78ffa9bb137071c00eec2d4afc247ef92d5c0b90
change-id: 20251216-k3-basic-dt-cd9540061989

Best regards,
-- 
Guodong Xu <guodong@riscstar.com>