Subject: [RFC PATCH v3 8/9] arm64: dts: rockchip: rk356x: Add the NPU and its IOMMU

From: Midgy BALON <[email-masked]>
Date: Thu, 4 Jun 2026 13:52:54 +0000

The RK3568 has an NVDLA-derived NPU at fde40000 with its own IOMMU at
fde4b000. Add both nodes (disabled by default) and the NPU power-domain
child under the PMU power-controller, and point rockchip,pmu at the PMU
syscon that controls the NPU NoC bus-idle.

The power-domain deliberately carries no pm_qos: qos_npu sits behind the
NPU NoC, which is gated until the NPU is brought up, so a genpd power-off
QoS save would fault reading it.

Signed-off-by: Midgy BALON <[email-masked]>
---
 arch/arm64/boot/dts/rockchip/rk356x-base.dtsi | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk356x-base.dtsi b/arch/arm64/boot/dts/rockchip/rk356x-base.dtsi
index 64bdd8b7754b5..50ce5a5e4fc24 100644
--- a/arch/arm64/boot/dts/rockchip/rk356x-base.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk356x-base.dtsi
@@ -512,6 +512,13 @@ power-domain@RK3568_PD_GPU {
 				#power-domain-cells = <0>;
 			};
 
+			pd_npu: power-domain@RK3568_PD_NPU {
+				reg = <RK3568_PD_NPU>;
+				clocks = <&cru ACLK_NPU_PRE>,
+					 <&cru HCLK_NPU_PRE>;
+				#power-domain-cells = <0>;
+			};
+
 			/* These power domains are grouped by VD_LOGIC */
 			power-domain@RK3568_PD_VI {
 				reg = <RK3568_PD_VI>;
@@ -948,6 +955,37 @@ qos_rga_wr: qos@fe158300 {
 		reg = <0x0 0xfe158300 0x0 0x20>;
 	};
 
+	rknn_core_0: npu@fde40000 {
+		compatible = "rockchip,rk3568-rknn-core";
+		reg = <0x0 0xfde40000 0x0 0x1000>,
+		      <0x0 0xfde41000 0x0 0x1000>,
+		      <0x0 0xfde43000 0x0 0x1000>;
+		reg-names = "pc", "cna", "core";
+		interrupts = <GIC_SPI 151 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&cru ACLK_NPU>, <&cru HCLK_NPU>,
+			 <&scmi_clk SCMI_CLK_NPU>, <&cru PCLK_NPU_PRE>;
+		clock-names = "aclk", "hclk", "npu", "pclk";
+		assigned-clocks = <&scmi_clk SCMI_CLK_NPU>;
+		assigned-clock-rates = <200000000>;
+		resets = <&cru SRST_A_NPU>, <&cru SRST_H_NPU>;
+		reset-names = "srst_a", "srst_h";
+		power-domains = <&power RK3568_PD_NPU>;
+		rockchip,pmu = <&pmu>;
+		iommus = <&rknn_mmu_0>;
+		status = "disabled";
+	};
+
+	rknn_mmu_0: iommu@fde4b000 {
+		compatible = "rockchip,iommu";
+		reg = <0x0 0xfde4b000 0x0 0x40>;
+		interrupts = <GIC_SPI 151 IRQ_TYPE_LEVEL_HIGH>;
+		clock-names = "aclk", "iface";
+		clocks = <&cru ACLK_NPU>, <&cru HCLK_NPU>;
+		power-domains = <&power RK3568_PD_NPU>;
+		#iommu-cells = <0>;
+		status = "disabled";
+	};
+
 	qos_npu: qos@fe180000 {
 		compatible = "rockchip,rk3568-qos", "syscon";
 		reg = <0x0 0xfe180000 0x0 0x20>;
-- 
2.39.5