[RFC PATCH 9/9] arm64: dts: rockchip: rk3576-rock-4d: enable NPU

[Jiaxing Hu]

Enable rknn_core_0 and rknn_mmu_0 on the Radxa ROCK 4D. Supply the NPU
rail (vdd_npu_s0) via npu-supply; it is marked regulator-always-on for
now because the NPU power sequencing is still being brought up (see the
cover letter) -- happy to switch to proper runtime control once the
compute path is sorted.

Signed-off-by: Jiaxing Hu <gahing at gahingwoo.com>
---
 arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts b/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts
index 272af1012..09d2fc98b 100644
--- a/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts
@@ -442,6 +442,7 @@ regulator-state-mem {
 			};
 
 			vdd_npu_s0: dcdc-reg2 {
+				regulator-always-on;
 				regulator-boot-on;
 				regulator-enable-ramp-delay = <400>;
 				regulator-min-microvolt = <550000>;
@@ -869,3 +870,18 @@ vp0_out_hdmi: endpoint at ROCKCHIP_VOP2_EP_HDMI0 {
 		remote-endpoint = <&hdmi_in_vp0>;
 	};
 };
+
+&rknn_core_0 {
+	npu-supply = <&vdd_npu_s0>;
+	/*
+	 * Power BOTH NPU domains (NPU0 + NPU1) like the vendor's single NPU node,
+	 * even though rocket computes only on core 0: the CBUF->CMAC read path is
+	 * only fully powered with NPU1 up. rocket attaches the multi-PD list.
+	 */
+	power-domains = <&power RK3576_PD_NPU0>, <&power RK3576_PD_NPU1>;
+	status = "okay";
+};
+
+&rknn_mmu_0 {
+	status = "okay";
+};
-- 
2.43.0