riscv: dts: spacemit: k3: add clock tree

Add clock support to SpacemiT K3 SoC, the clock tree consist of several
blocks which are APBC, APMU, DCIU, MPUM.

Link: https://lore.kernel.org/r/20260304-01-dts-uart-full-v1-1-50a0aa53a245@kernel.org
Signed-off-by: Yixun Lan <dlan@kernel.org>

Author: Yixun Lan

arch/riscv/boot/dts/spacemit/k3.dtsi

@@ -4,6 +4,7 @@
  * Copyright (c) 2026 Guodong Xu <guodong@riscstar.com>
  */
 
+#include <dt-bindings/clock/spacemit,k3-clocks.h>
 #include <dt-bindings/interrupt-controller/irq.h>
 
 /dts-v1/;
@@ -398,6 +399,36 @@
 		};
 	};
 
+	clocks {
+		vctcxo_1m: clock-1m {
+			compatible = "fixed-clock";
+			clock-frequency = <1000000>;
+			clock-output-names = "vctcxo_1m";
+			#clock-cells = <0>;
+		};
+
+		vctcxo_24m: clock-24m {
+			compatible = "fixed-clock";
+			clock-frequency = <24000000>;
+			clock-output-names = "vctcxo_24m";
+			#clock-cells = <0>;
+		};
+
+		vctcxo_3m: clock-3m {
+			compatible = "fixed-clock";
+			clock-frequency = <3000000>;
+			clock-output-names = "vctcxo_3m";
+			#clock-cells = <0>;
+		};
+
+		osc_32k: clock-32k {
+			compatible = "fixed-clock";
+			clock-frequency = <32000>;
+			clock-output-names = "osc_32k";
+			#clock-cells = <0>;
+		};
+	};
+
 	soc: soc {
 		compatible = "simple-bus";
 		interrupt-parent = <&saplic>;
@@ -406,6 +437,15 @@
 		dma-noncoherent;
 		ranges;
 
+		syscon_apbc: system-controller@d4015000 {
+			compatible = "spacemit,k3-syscon-apbc";
+			reg = <0x0 0xd4015000 0x0 0x1000>;
+			clocks = <&osc_32k>, <&vctcxo_1m>, <&vctcxo_3m>, <&vctcxo_24m>;
+			clock-names = "osc", "vctcxo_1m", "vctcxo_3m", "vctcxo_24m";
+			#clock-cells = <1>;
+			#reset-cells = <1>;
+		};
+
 		uart0: serial@d4017000 {
 			compatible = "spacemit,k3-uart", "intel,xscale-uart";
 			reg = <0x0 0xd4017000 0x0 0x100>;
@@ -506,6 +546,41 @@
 			status = "disabled";
 		};
 
+		syscon_mpmu: system-controller@d4050000 {
+			compatible = "spacemit,k3-syscon-mpmu";
+			reg = <0x0 0xd4050000 0x0 0x10000>;
+			clocks = <&osc_32k>, <&vctcxo_1m>, <&vctcxo_3m>, <&vctcxo_24m>;
+			clock-names = "osc", "vctcxo_1m", "vctcxo_3m", "vctcxo_24m";
+			#clock-cells = <1>;
+			#power-domain-cells = <1>;
+			#reset-cells = <1>;
+		};
+
+		pll: clock-controller@d4090000 {
+			compatible = "spacemit,k3-pll";
+			reg = <0x0 0xd4090000 0x0 0x10000>;
+			clocks = <&vctcxo_24m>;
+			spacemit,mpmu = <&syscon_mpmu>;
+			#clock-cells = <1>;
+		};
+
+		syscon_apmu: system-controller@d4282800 {
+			compatible = "spacemit,k3-syscon-apmu";
+			reg = <0x0 0xd4282800 0x0 0x400>;
+			clocks = <&osc_32k>, <&vctcxo_1m>, <&vctcxo_3m>, <&vctcxo_24m>;
+			clock-names = "osc", "vctcxo_1m", "vctcxo_3m", "vctcxo_24m";
+			#clock-cells = <1>;
+			#power-domain-cells = <1>;
+			#reset-cells = <1>;
+		};
+
+		syscon_dciu: system-controller@d8440000 {
+			compatible = "spacemit,k3-syscon-dciu";
+			reg = <0x0 0xd8440000 0x0 0xc000>;
+			#clock-cells = <1>;
+			#reset-cells = <1>;
+		};
+
 		simsic: interrupt-controller@e0400000 {
 			compatible = "spacemit,k3-imsics", "riscv,imsics";
 			reg = <0x0 0xe0400000 0x0 0x200000>;