On 16/05/2025 18:53, Tomeu Vizoso wrote: > 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) > > Signed-off-by: Tomeu Vizoso <to...@tomeuvizoso.net> > Signed-off-by: Sebastian Reichel <sebastian.reic...@collabora.com> > --- > .../bindings/npu/rockchip,rknn-core.yaml | 162 > +++++++++++++++++++++
Nothing here was tested, so limited review. > 1 file changed, 162 insertions(+) > > diff --git a/Documentation/devicetree/bindings/npu/rockchip,rknn-core.yaml > b/Documentation/devicetree/bindings/npu/rockchip,rknn-core.yaml > new file mode 100644 > index > 0000000000000000000000000000000000000000..4572fb777f1454d0147da29791033fc27c53b8d2 > --- /dev/null > +++ b/Documentation/devicetree/bindings/npu/rockchip,rknn-core.yaml > @@ -0,0 +1,162 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/npu/rockchip,rknn-core.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Neural Processing Unit IP from Rockchip > + > +maintainers: > + - Tomeu Vizoso <to...@tomeuvizoso.net> > + > +description: > + Rockchip IP for accelerating inference of neural networks, based on > NVIDIA's > + open source NVDLA IP. > + > + 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: > + $nodename: > + pattern: '^npu-core@[a-f0-9]+$' > + > + compatible: > + oneOf: > + - items: Drop, just enum > + - enum: > + - rockchip,rk3588-rknn-core-top > + - items: Drop > + - enum: Drop, part of previous enum. > + - rockchip,rk3588-rknn-core > + > + reg: > + minItems: 3 No, maxItems instead > + > + reg-names: > + minItems: 3 No, drop, makes no sense. > + items: > + - const: pc > + - const: cna > + - const: core > + > + clocks: > + minItems: 2 > + maxItems: 4 > + > + clock-names: > + items: > + - const: aclk > + - const: hclk > + - const: npu > + - const: pclk > + minItems: 2 > + > + 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 > + then: > + properties: > + clocks: > + minItems: 4 > + > + clock-names: > + minItems: 4 > + - if: > + properties: > + compatible: > + contains: > + enum: > + - rockchip,rknn-core > + then: > + properties: > + clocks: > + maxItems: 2 > + clock-names: > + maxItems: 2 > + > +additionalProperties: false > + > +examples: > + - | > + #include <dt-bindings/clock/rockchip,rk3588-cru.h> > + #include <dt-bindings/interrupt-controller/irq.h> > + #include <dt-bindings/interrupt-controller/arm-gic.h> > + #include <dt-bindings/power/rk3588-power.h> > + #include <dt-bindings/reset/rockchip,rk3588-cru.h> > + > + bus { > + #address-cells = <2>; > + #size-cells = <2>; > + > + rknn_core_top: npu-core@fdab0000 { Drop unused label npu@ > + compatible = "rockchip,rk3588-rknn-core-top", > "rockchip,rknn-core-top"; This makes no sense... If you change compatibles you must change example DTS and your DTS. > + reg = <0x0 0xfdab0000 0x0 0x9000>; > + assigned-clocks = <&scmi_clk SCMI_CLK_NPU>; > + assigned-clock-rates = <200000000>; > + clocks = <&cru ACLK_NPU0>, <&cru HCLK_NPU0>, > + <&scmi_clk SCMI_CLK_NPU>, <&cru PCLK_NPU_ROOT>; > + clock-names = "aclk", "hclk", "npu", "pclk"; > + interrupts = <GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH 0>; > + iommus = <&rknn_mmu_top>; > + npu-supply = <&vdd_npu_s0>; > + power-domains = <&power RK3588_PD_NPUTOP>; > + resets = <&cru SRST_A_RKNN0>, <&cru SRST_H_RKNN0>; > + reset-names = "srst_a", "srst_h"; > + sram-supply = <&vdd_npu_mem_s0>; > + }; > + > + rknn_core_1: npu-core@fdac0000 { > + compatible = "rockchip,rk3588-rknn-core", "rockchip,rknn-core"; > + reg = <0x0 0xfdac0000 0x0 0x9000>; > + clocks = <&cru ACLK_NPU1>, <&cru HCLK_NPU1>; Difference by one property does not really justify new example. Keep only one, which would halve the errors you have here. :/ Best regards, Krzysztof
