[PATCH v6 01/10] dt-bindings: npu: rockchip,rknn: Add bindings

[Heiko Stübner]

Am Mittwoch, 4. Juni 2025, 09:57:14 Mitteleuropäische Sommerzeit schrieb Tomeu Vizoso:
> Add the bindings for the Neural Processing Unit IP from Rockchip.
> 
> v2:
> - Adapt to new node structure (one node per core, each with its own
>   IOMMU)
> - Several misc. fixes from Sebastian Reichel
> 
> v3:
> - Split register block in its constituent subblocks, and only require
>   the ones that the kernel would ever use (Nicolas Frattaroli)
> - Group supplies (Rob Herring)
> - Explain the way in which the top core is special (Rob Herring)
> 
> v4:
> - Change required node name to npu@ (Rob Herring and Krzysztof Kozlowski)
> - Remove unneeded items: (Krzysztof Kozlowski)
> - Fix use of minItems/maxItems (Krzysztof Kozlowski)
> - Add reg-names to list of required properties (Krzysztof Kozlowski)
> - Fix example (Krzysztof Kozlowski)
> 
> v5:
> - Rename file to rockchip,rk3588-rknn-core.yaml (Krzysztof Kozlowski)
> - Streamline compatible property (Krzysztof Kozlowski)
> 
> v6:
> - Remove mention to NVDLA, as the hardware is only incidentally related
>   (Kever Yang)
> - Mark pclk and npu clocks as required by all clocks (Rob Herring)
> 
> Signed-off-by: Sebastian Reichel <sebastian.reichel at collabora.com>
> Signed-off-by: Tomeu Vizoso <tomeu at tomeuvizoso.net>
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski at linaro.org>
> ---
>  .../bindings/npu/rockchip,rk3588-rknn-core.yaml    | 144 +++++++++++++++++++++
>  1 file changed, 144 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/npu/rockchip,rk3588-rknn-core.yaml b/Documentation/devicetree/bindings/npu/rockchip,rk3588-rknn-core.yaml
> new file mode 100644
> index 0000000000000000000000000000000000000000..9a5e9e213912d0997da2f6ae26189adf044dcc7b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/npu/rockchip,rk3588-rknn-core.yaml
> @@ -0,0 +1,144 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/npu/rockchip,rk3588-rknn-core.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Neural Processing Unit IP from Rockchip
> +
> +maintainers:
> +  - Tomeu Vizoso <tomeu at tomeuvizoso.net>
> +
> +description:
> +  Rockchip IP for accelerating inference of neural networks.
> +
> +  There is to be a node per each core in the NPU. In Rockchip's design there
> +  will be one core that is special and needs to be powered on before any of the
> +  other cores can be used. This special core is called the top core and should
> +  have the compatible string that corresponds to top cores.
> +
> +properties:
> +  $nodename:
> +    pattern: '^npu@[a-f0-9]+$'
> +
> +  compatible:
> +    enum:
> +      - rockchip,rk3588-rknn-core-top
> +      - rockchip,rk3588-rknn-core
> +
> +  reg:
> +    maxItems: 3
> +
> +  reg-names:
> +    items:
> +      - const: pc
> +      - const: cna
> +      - const: core
> +
> +  clocks:
> +    maxItems: 4
> +
> +  clock-names:
> +    items:
> +      - const: aclk
> +      - const: hclk
> +      - const: npu
> +      - const: pclk
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  iommus:
> +    maxItems: 1
> +
> +  npu-supply: true
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  resets:
> +    maxItems: 2
> +
> +  reset-names:
> +    items:
> +      - const: srst_a
> +      - const: srst_h
> +
> +  sram-supply: true
> +
> +required:
> +  - compatible
> +  - reg
> +  - reg-names
> +  - clocks
> +  - clock-names
> +  - interrupts
> +  - iommus
> +  - power-domains
> +  - resets
> +  - reset-names
> +  - npu-supply
> +  - sram-supply
> +
> +allOf:
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - rockchip,rknn-core-top

should be rockchip,rk3588-rknn-core-top I think

> +    then:
> +      properties:
> +        clocks:
> +          minItems: 4
> +
> +        clock-names:
> +          minItems: 4
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - rockchip,rknn-core

should be rockchip,rk3588-rknn-core

> +    then:
> +      properties:
> +        clocks:
> +          maxItems: 2
> +        clock-names:
> +          maxItems: 2


Heiko