dts: arm: adi: Add MAX32657 power management states

Add basic power management states of MAX32657.
After UG/DS has been finalized the values and states
might be need to be updated.

Signed-off-by: Sadik Ozer <[email protected]>

Author: ozersa

dts/arm/adi/max32/max32657_common.dtsi

@@ -25,11 +25,43 @@
 			#address-cells = <1>;
 			#size-cells = <1>;
 
+			cpu-power-states = <&idle &suspend &standby>;
+
 			mpu: mpu@e000ed90 {
 				compatible = "arm,armv8m-mpu";
 				reg = <0xe000ed90 0x40>;
 			};
 		};
+
+		power-states {
+			/* Sleep Mode */
+			idle: idle {
+				compatible = "zephyr,power-state";
+				power-state-name = "runtime-idle";
+				/* The value not mentioned in UG/DS, set it as 1us */
+				min-residency-us = <1>;
+				/* Typical value is 0.847us as per of Datasheet */
+				exit-latency-us = <1>;
+			};
+			/* Deep-sleep Mode */
+			suspend: suspend {
+				compatible = "zephyr,power-state";
+				power-state-name = "suspend-to-idle";
+				/* The value not mentioned in UG/DS, set it as 35us */
+				min-residency-us = <35>;
+				/* Typical value is 12.4us as per of Datasheet */
+				exit-latency-us = <25>;
+			};
+			/* Standby Mode */
+			standby: standby {
+				compatible = "zephyr,power-state";
+				power-state-name = "standby";
+				/* The value not mentioned in UG/DS, set it as 40us */
+				min-residency-us = <40>;
+				/* Typical value is 14.7us as per of Datasheet */
+				exit-latency-us = <30>;
+			};
+		};
 	};
 
 	clocks {