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

[Tomeu Vizoso]

On Wed, Jun 4, 2025 at 10:25 AM Heiko Stübner <heiko at sntech.de> wrote:
>
> 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

Thanks. Actually, all the addOf section is not needed any more as we
now know that from a resources point of view all cores are the same.

Cheers,

Tomeu

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