From 2415dcc5ea021a1afebad060279e523dde5aa87c Mon Sep 17 00:00:00 2001
From: Sadik Ozer <sadik.ozer@analog.com>
Date: Mon, 25 Dec 2023 15:23:41 +0300
Subject: [PATCH] dts: arm: adi: Add power management states in devicetree

This commits added power management states in max32xxx MCUs
Common states added in max32xxx.dtsi file and additional ones
added in max32655.dtsi

Exit-latency-us value set as per of device datasheet spec.
The typical value is mentioned in DS is multiplied with 2.
For more information please take a look:
https://www.analog.com/en/products/max32655.html

Signed-off-by: Sadik Ozer <sadik.ozer@analog.com>
---
 dts/arm/adi/max32/max32655.dtsi | 18 ++++++++++++++++++
 dts/arm/adi/max32/max32xxx.dtsi | 22 ++++++++++++++++++++++
 2 files changed, 40 insertions(+)

diff --git a/dts/arm/adi/max32/max32655.dtsi b/dts/arm/adi/max32/max32655.dtsi
index fd148a6ac8d..a099efc0d10 100644
--- a/dts/arm/adi/max32/max32655.dtsi
+++ b/dts/arm/adi/max32/max32655.dtsi
@@ -33,6 +33,24 @@
 
 /* MAX32655 extra peripherals. */
 / {
+	cpus {
+		cpu@0 {
+			cpu-power-states = <&idle &suspend &standby>;
+		};
+
+		power-states {
+			/* 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>;
+			};
+		};
+	};
+
 	soc {
 		sram1: memory@20008000 {
 			compatible = "mmio-sram";
diff --git a/dts/arm/adi/max32/max32xxx.dtsi b/dts/arm/adi/max32/max32xxx.dtsi
index 10f9630eb84..e19bcc7f53d 100644
--- a/dts/arm/adi/max32/max32xxx.dtsi
+++ b/dts/arm/adi/max32/max32xxx.dtsi
@@ -26,6 +26,28 @@
 			device_type = "cpu";
 			compatible = "arm,cortex-m4f";
 			reg = <0>;
+			cpu-power-states = <&idle &suspend>;
+		};
+
+		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>;
+			};
 		};
 	};