Am Sonntag, 13. Juli 2025, 10:38:58 Mitteleuropäische Sommerzeit schrieb Tomeu Vizoso:

See Chapter 36 "RKNN" from the RK3588 TRM (Part 1).

The IP is divided in three cores, programmed independently. The first core though is special, being able to delegate work to the other cores.

The IOMMU of the first core is also special in that it has two subunits (read/write?) that need to be programmed in sync.

v2:

• Have one device for each NPU core (Sebastian Reichel)
• Have one device for each IOMMU (Sebastian Reichel)
• Correctly sort nodes (Diederik de Haas)
• Add rockchip,iommu compatible to IOMMU nodes (Sebastian Reichel)

v3:

• Adapt to a split of the register block in the DT bindings (Nicolas Frattaroli)

v4:

• Adapt to changes in bindings

v6:

• pclk and npu clocks are needed by all clocks (Rob Herring)

v8:

• Remove notion of top core (Robin Murphy)

Tested-by: Heiko Stuebner heiko@sntech.de Signed-off-by: Tomeu Vizoso tomeu@tomeuvizoso.net

---

arch/arm64/boot/dts/rockchip/rk3588-base.dtsi | 91 +++++++++++++++++++++++++++ 1 file changed, 91 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588-base.dtsi b/arch/arm64/boot/dts/rockchip/rk3588-base.dtsi index 1eddc69fd9c9ed95cdc810ba48d9683e3f82489a..dbd472feaa8b3f8c14597a48a4f5afbe3cb45b6a 100644 --- a/arch/arm64/boot/dts/rockchip/rk3588-base.dtsi +++ b/arch/arm64/boot/dts/rockchip/rk3588-base.dtsi @@ -1140,6 +1140,97 @@ power-domain@RK3588_PD_SDMMC { }; };

• rknn_core_0: npu@fdab0000 {

• compatible = "rockchip,rk3588-rknn-core";
  

• reg = <0x0 0xfdab0000 0x0 0x1000>,
  

•       <0x0 0xfdab1000 0x0 0x1000>,
  

•       <0x0 0xfdab3000 0x0 0x1000>;
  

• reg-names = "pc", "cna", "core";
  

• interrupts = <GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH 0>;
  

• clocks = <&cru ACLK_NPU0>, <&cru HCLK_NPU0>,
  

• 	 <&scmi_clk SCMI_CLK_NPU>, <&cru PCLK_NPU_ROOT>;
  

• clock-names = "aclk", "hclk", "npu", "pclk";
  

• assigned-clocks = <&scmi_clk SCMI_CLK_NPU>;
  

• assigned-clock-rates = <200000000>;
  

• resets = <&cru SRST_A_RKNN0>, <&cru SRST_H_RKNN0>;
  

• reset-names = "srst_a", "srst_h";
  

• power-domains = <&power RK3588_PD_NPUTOP>;
  

• iommus = <&rknn_mmu_top>;
  

• status = "disabled";
  

• };
• rknn_mmu_top: iommu@fdab9000 {

nit: phandle for the mmu should probably also follow the naming change? I.e. become rknn_mmu_0 ?

• compatible = "rockchip,rk3588-iommu", "rockchip,rk3568-iommu";
  

• reg = <0x0 0xfdab9000 0x0 0x100>,
  

•       <0x0 0xfdaba000 0x0 0x100>;
  

• interrupts = <GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH 0>;
  

• clocks = <&cru ACLK_NPU0>, <&cru HCLK_NPU0>;
  

• clock-names = "aclk", "iface";
  

• #iommu-cells = <0>;
  

• power-domains = <&power RK3588_PD_NPUTOP>;
  

• status = "disabled";
  

• };