dts: mcxw7x: Add Power Management support

Add support for power management states

Signed-off-by: Mahesh Mahadevan <[email protected]>

Author: mmahadevan108

dts/arm/nxp/nxp_mcxw7x_common.dtsi

@@ -32,6 +32,7 @@
 		cpu0: cpu@0 {
 			compatible = "arm,cortex-m33f";
 			reg = <0>;
+			cpu-power-states = <&sleep &sleep_optimized &deep_sleep>;
 			#address-cells = <1>;
 			#size-cells = <1>;
 
@@ -40,6 +41,31 @@
 				reg = <0xe000ed90 0x40>;
 			};
 		};
+
+		power-states {
+			/* This is most simple state and is just entered by doing WFI. */
+			sleep: sleep {
+				compatible = "zephyr,power-state";
+				power-state-name = "runtime-idle";
+				min-residency-us = <100>;
+				exit-latency-us = <0>;
+			};
+			/* This is corresponding to SoC sleep mode. */
+			sleep_optimized: sleep-optimized {
+				compatible = "zephyr,power-state";
+				power-state-name = "suspend-to-idle";
+				substate-id = <0>;
+				min-residency-us = <500>;
+				exit-latency-us = <10>;
+			};
+			/* This is corresponding to SoC deep-sleep mode. */
+			deep_sleep: deep-sleep {
+				compatible = "zephyr,power-state";
+				power-state-name = "standby";
+				min-residency-us = <1000>;
+				exit-latency-us = <11>;
+			};
+		};
 	};
 
 	soc {