arm64: zynqmp: Add coresight cpu debug support

Add coresight debug support to the device tree. This can be useful when
panicking, especially when a core is hung in EL3.
Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
Link: https://lore.kernel.org/r/20240503153422.1958812-1-sean.anderson@linux.devSigned-off-by: Michal Simek <michal.simek@amd.com>

arch/arm64/boot/dts/xilinx/zynqmp-clk-ccf.dtsi

@@ -70,6 +70,22 @@ &cpu0 {
 	clocks = <&zynqmp_clk ACPU>;
 };
 
+&cpu0_debug {
+	clocks = <&zynqmp_clk DBF_FPD>;
+};
+
+&cpu1_debug {
+	clocks = <&zynqmp_clk DBF_FPD>;
+};
+
+&cpu2_debug {
+	clocks = <&zynqmp_clk DBF_FPD>;
+};
+
+&cpu3_debug {
+	clocks = <&zynqmp_clk DBF_FPD>;
+};
+
 &fpd_dma_chan1 {
 	clocks = <&zynqmp_clk GDMA_REF>, <&zynqmp_clk LPD_LSBUS>;
 };

arch/arm64/boot/dts/xilinx/zynqmp.dtsi

@@ -387,6 +387,34 @@ pmu@9000 {
 			};
 		};
 
+		cpu0_debug: debug@fec10000 {
+			compatible = "arm,coresight-cpu-debug", "arm,primecell";
+			reg = <0x0 0xfec10000 0x0 0x1000>;
+			clock-names = "apb_pclk";
+			cpu = <&cpu0>;
+		};
+
+		cpu1_debug: debug@fed10000 {
+			compatible = "arm,coresight-cpu-debug", "arm,primecell";
+			reg = <0x0 0xfed10000 0x0 0x1000>;
+			clock-names = "apb_pclk";
+			cpu = <&cpu1>;
+		};
+
+		cpu2_debug: debug@fee10000 {
+			compatible = "arm,coresight-cpu-debug", "arm,primecell";
+			reg = <0x0 0xfee10000 0x0 0x1000>;
+			clock-names = "apb_pclk";
+			cpu = <&cpu2>;
+		};
+
+		cpu3_debug: debug@fef10000 {
+			compatible = "arm,coresight-cpu-debug", "arm,primecell";
+			reg = <0x0 0xfef10000 0x0 0x1000>;
+			clock-names = "apb_pclk";
+			cpu = <&cpu3>;
+		};
+
 		/* GDMA */
 		fpd_dma_chan1: dma-controller@fd500000 {
 			status = "disabled";