diff --git a/boards/arm/mimxrt595_evk/board.c b/boards/arm/mimxrt595_evk/board.c
index 3322f75d48b..8adf39cf313 100644
--- a/boards/arm/mimxrt595_evk/board.c
+++ b/boards/arm/mimxrt595_evk/board.c
@@ -5,6 +5,7 @@
 
 #include <zephyr/init.h>
 #include "fsl_power.h"
+#include <zephyr/pm/policy.h>
 
 #if CONFIG_REGULATOR
 #include <zephyr/drivers/regulator.h>
@@ -71,6 +72,9 @@ static int board_config_pmic(const struct device *dev)
 		return ret;
 	}
 
+	/* We can enter deep low power modes */
+	pm_policy_state_lock_put(PM_STATE_SUSPEND_TO_IDLE, PM_ALL_SUBSTATES);
+
 	return ret;
 }
 #endif
@@ -88,6 +92,9 @@ static int mimxrt595_evk_init(const struct device *dev)
 
 	POWER_SetPadVolRange(&vrange);
 
+	/* Do not enter deep low power modes until the PMIC modes have been initialized */
+	pm_policy_state_lock_get(PM_STATE_SUSPEND_TO_IDLE, PM_ALL_SUBSTATES);
+
 	return 0;
 }
 
diff --git a/boards/arm/mimxrt595_evk/doc/index.rst b/boards/arm/mimxrt595_evk/doc/index.rst
index 749046a1dac..3e636645100 100644
--- a/boards/arm/mimxrt595_evk/doc/index.rst
+++ b/boards/arm/mimxrt595_evk/doc/index.rst
@@ -100,6 +100,9 @@ already supported, which can also be re-used on this mimxrt595_evk board:
 +-----------+------------+-------------------------------------+
 | RTC       | on-chip    | counter                             |
 +-----------+------------+-------------------------------------+
+| PM        | on-chip    | power management; uses SoC sleep,   |
+|           |            | deep sleep and deep-powerdown modes |
++-----------+------------+-------------------------------------+
 
 The default configuration can be found in the defconfig file:
 
diff --git a/boards/arm/mimxrt595_evk/mimxrt595_evk_cm33-pinctrl.dtsi b/boards/arm/mimxrt595_evk/mimxrt595_evk_cm33-pinctrl.dtsi
index 900af7ae0ec..7fb0a39595b 100644
--- a/boards/arm/mimxrt595_evk/mimxrt595_evk_cm33-pinctrl.dtsi
+++ b/boards/arm/mimxrt595_evk/mimxrt595_evk_cm33-pinctrl.dtsi
@@ -98,4 +98,45 @@
 			bias-pull-down;
 		};
 	};
+
+	pinmux_flexspi: pinmux_flexspi {
+		group0 {
+			pinmux = <FLEXSPI0_SCLK_PIO1_18>,
+					<FLEXSPI0_SS0_N_PIO1_19>,
+					<FLEXSPI0_DATA0_PIO1_20>,
+					<FLEXSPI0_DATA1_PIO1_21>,
+					<FLEXSPI0_DATA2_PIO1_22>,
+					<FLEXSPI0_DATA3_PIO1_23>,
+					<FLEXSPI0_DATA4_PIO1_24>,
+					<FLEXSPI0_DATA5_PIO1_25>,
+					<FLEXSPI0_DATA6_PIO1_26>,
+					<FLEXSPI0_DATA7_PIO1_27>;
+			input-enable;
+			slew-rate = "normal";
+			drive-strength = "high";
+		};
+	};
+
+	pinmux_flexspi_sleep: pinmux_flexspi_sleep {
+		group0 {
+			pinmux = <FLEXSPI0_SCLK_PIO1_18>,
+					<FLEXSPI0_SS0_N_PIO1_19>;
+			slew-rate = "normal";
+			drive-strength = "high";
+		};
+		group1 {
+			pinmux = <FLEXSPI0_DATA0_PIO1_20>,
+					<FLEXSPI0_DATA1_PIO1_21>,
+					<FLEXSPI0_DATA2_PIO1_22>,
+					<FLEXSPI0_DATA3_PIO1_23>,
+					<FLEXSPI0_DATA4_PIO1_24>,
+					<FLEXSPI0_DATA5_PIO1_25>,
+					<FLEXSPI0_DATA6_PIO1_26>,
+					<FLEXSPI0_DATA7_PIO1_27>;
+			input-enable;
+			slew-rate = "normal";
+			drive-strength = "high";
+			bias-pull-up;
+		};
+	};
 };
diff --git a/boards/arm/mimxrt595_evk/mimxrt595_evk_cm33.dts b/boards/arm/mimxrt595_evk/mimxrt595_evk_cm33.dts
index f3c44ca2400..8ab5532ad4e 100644
--- a/boards/arm/mimxrt595_evk/mimxrt595_evk_cm33.dts
+++ b/boards/arm/mimxrt595_evk/mimxrt595_evk_cm33.dts
@@ -91,6 +91,41 @@
 				<20 0 &gpio4 22 0>,	/* D14 */
 				<21 0 &gpio4 21 0>;	/* D15 */
 	};
+
+	power-states {
+		/* This is the setting Sleep Mode */
+		idle: idle {
+			compatible = "zephyr,power-state";
+			power-state-name = "runtime-idle";
+			min-residency-us = <0>;
+			exit-latency-us = <0>;
+		};
+		/* This is the setting for Deep-sleep Mode */
+		suspend: suspend {
+			compatible = "nxp,pdcfg-power", "zephyr,power-state";
+			power-state-name = "suspend-to-idle";
+			min-residency-us = <500>;
+			exit-latency-us = <120>;
+			/*
+			 * These values are written to the PDSLEEPCFG registers to keep certain
+			 * blocks such as LPOSC, SRAM's, FlexSPI0 SRAM powered on during deep
+			 * sleep mode.
+			 */
+			deep-sleep-config = <0xC800>,
+						<0x80000004>,
+						<0xFFFFFFFF>,
+						<0>;
+		};
+		/*
+		 * Deep power-down mode is supported in this SoC through 'PM_STATE_SOFT_OFF' state.
+		 * There is no entry for this in device tree, user can call pm_state_force to enter
+		 * this state.
+		 */
+	};
+};
+
+&cpu0 {
+	cpu-power-states = <&idle &suspend>;
 };
 
 /*
@@ -164,23 +199,35 @@ arduino_serial: &flexcomm12 {
 
 		pca9420_sw1: BUCK1 {
 			regulator-boot-on;
+			nxp,mode0-microvolt = <1100000>;
+			nxp,mode1-microvolt = <600000>;
+			nxp,mode2-microvolt = <0>;
 		};
 
 		pca9420_sw2: BUCK2 {
 			regulator-boot-on;
+			nxp,mode0-microvolt = <1800000>;
+			nxp,mode1-microvolt = <1800000>;
+			nxp,mode2-microvolt = <1800000>;
+
 		};
 
 		pca9420_ldo1: LDO1 {
 			regulator-boot-on;
+			nxp,mode0-microvolt = <1800000>;
+			nxp,mode1-microvolt = <1800000>;
+			nxp,mode2-microvolt = <1800000>;
 		};
 
 		pca9420_ldo2: LDO2 {
 			regulator-boot-on;
+			nxp,mode0-microvolt = <3300000>;
+			nxp,mode1-microvolt = <3300000>;
+			nxp,mode2-microvolt = <3300000>;
 		};
 	};
 };
 
-
 &gpio0 {
 	status = "okay";
 };
@@ -272,6 +319,10 @@ zephyr_udc0: &usbhs {
 
 &flexspi {
 	status = "okay";
+	pinctrl-0 = <&pinmux_flexspi>;
+	pinctrl-1 = <&pinmux_flexspi_sleep>;
+	pinctrl-names = "default", "sleep";
+
 	mx25um51345g: mx25um51345g@0 {
 		compatible = "nxp,imx-flexspi-mx25um51345g";
 		/* MX25UM51245G is 64MB, 512MBit flash part */