dts: pm: esp32h2: Add power states

Add power states for PM.

Signed-off-by: Raffael Rostagno <[email protected]>

Author: Raffael Rostagno

dts/riscv/espressif/esp32h2/esp32h2_common.dtsi

@@ -36,10 +36,27 @@
 			compatible = "espressif,riscv";
 			riscv,isa = "rv32imac_zicsr";
 			reg = <0>;
+			cpu-power-states = <&light_sleep &deep_sleep>;
 			clock-source = <ESP32_CPU_CLK_SRC_PLL>;
 			clock-frequency = <DT_FREQ_M(96)>;
 			xtal-freq = <DT_FREQ_M(32)>;
 		};
+
+		power-states {
+			light_sleep: light_sleep {
+				compatible = "zephyr,power-state";
+				power-state-name = "standby";
+				min-residency-us = <200>;
+				exit-latency-us = <60>;
+			};
+
+			deep_sleep: deep_sleep {
+				compatible = "zephyr,power-state";
+				power-state-name = "soft-off";
+				min-residency-us = <2000>;
+				exit-latency-us = <212>;
+			};
+		};
 	};
 
 	pinctrl: pin-controller {