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Tue, 16 Dec 2025 05:32:53 -0800 (PST) From: Guodong Xu Subject: [PATCH 0/8] riscv: spacemit: Add SpacemiT K3 SoC and K3 Pico-ITX board Date: Tue, 16 Dec 2025 21:32:24 +0800 Message-Id: <20251216-k3-basic-dt-v1-0-a0d256c9dc92@riscstar.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit X-B4-Tracking: v=1; b=H4sIAGhfQWkC/6tWKk4tykwtVrJSqFYqSi3LLM7MzwNyDHUUlJIzE vPSU3UzU4B8JSMDI1NDI0Mz3Wxj3aTE4sxk3ZQS3eQUS1MTAwMzQ0sLSyWgjoKi1LTMCrBp0bG 1tQC0HgM4XQAAAA== X-Change-ID: 20251216-k3-basic-dt-cd9540061989 To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Yixun Lan , Daniel Lezcano , Thomas Gleixner , Samuel Holland , Anup Patel , Greg Kroah-Hartman , Jiri Slaby , Lubomir Rintel , Yangyu Chen Cc: Paul Walmsley , Palmer Dabbelt , Conor Dooley , Heinrich Schuchardt , Kevin Meng Zhang , devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, spacemit@lists.linux.dev, linux-serial@vger.kernel.org, Guodong Xu X-Mailer: b4 0.14.2 This series introduces basic support for the SpacemiT K3 SoC and the K3 Pico-ITX evaluation board. 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. This series includes: - DT bindings for SpacemiT X100 core, K3 SoC, and Pico-ITX board. - DT bindings for K3 integrated peripherals: CLINT, APLIC, IMSIC, and UART. - Initial Device Tree for K3 SoC and Pico-ITX board. >From an RVA23 profile compliance perspective, the X100 supports all mandatory extensions required by RVA23U64 and RVA23S64. Ideally, all these extensions should be listed in the 'riscv,isa-extensions' string. However, some mandatory extensions (e.g. "ziccif", "sstvecd") are not yet supported (listed) by the upstream riscv/extensions.yaml binding. To avoid validation warnings (“Unevaluated properties are not allowed" when make dtbs_check W=3) and to prevent the kernel from silently dropping unrecognized strings, this series only declares the isa-extensions that are currently supported by the kernel bindings. Link: https://www.spacemit.com/en/spacemit-x100-core/ [1] Signed-off-by: Guodong Xu --- Guodong Xu (8): 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: serial: 8250: add SpacemiT K3 UART compatible dt-bindings: riscv: spacemit: add K3 and Pico-ITX board bindings riscv: dts: spacemit: add initial device tree of SpacemiT K3 SoC riscv: dts: spacemit: add SpacemiT K3 Pico-ITX board device tree .../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 | 6 +- Documentation/devicetree/bindings/serial/8250.yaml | 1 + .../devicetree/bindings/timer/sifive,clint.yaml | 1 + arch/riscv/boot/dts/spacemit/Makefile | 1 + arch/riscv/boot/dts/spacemit/k3-pico-itx.dts | 25 + arch/riscv/boot/dts/spacemit/k3.dtsi | 529 +++++++++++++++++++++ 9 files changed, 565 insertions(+), 1 deletion(-) --- base-commit: 8f0b4cce4481fb22653697cced8d0d04027cb1e8 change-id: 20251216-k3-basic-dt-cd9540061989 Best regards, -- Guodong Xu