From 7791055b13fc720ef0c32de7c52e3a9d3adb449b Mon Sep 17 00:00:00 2001
From: Johnny Liu <johnliu@nvidia.com>
Date: Mon, 10 Apr 2023 06:56:53 +0000
Subject: [PATCH] t23x: overlay: add cpuidle idle states

Add the c7 cpu idle state for all cpu cores. The choice to enable the
cpuidle psci driver can be specified in the platform-specific overlay
file.

Bug 3845478

Signed-off-by: Johnny Liu <johnliu@nvidia.com>
Change-Id: I506f3be56adc1c37703080213ec2e3026bc98850
Reviewed-on: https://git-master.nvidia.com/r/c/device/hardware/nvidia/soc/t23x-generic-dts/+/2871275
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
---
 overlay/tegra234-base-overlay.dtsi | 63 ++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)

diff --git a/overlay/tegra234-base-overlay.dtsi b/overlay/tegra234-base-overlay.dtsi
index 9c35452..50718fb 100644
--- a/overlay/tegra234-base-overlay.dtsi
+++ b/overlay/tegra234-base-overlay.dtsi
@@ -704,6 +704,69 @@
 				};
 			};
 
+			cpus {
+				idle-states {
+					entry-method = "psci";
+
+					C7: c7 {
+						compatible = "arm,idle-state";
+						arm,psci-suspend-param = <0x40000007>;
+						min-residency-us = <30000>;
+						wakeup-latency-us = <5000>;
+						idle-state-name = "Core powergate";
+						status = "disabled";
+					};
+				};
+
+				cpu@0 {
+					cpu-idle-states = <&C7>;
+				};
+
+				cpu@100 {
+					cpu-idle-states = <&C7>;
+				};
+
+				cpu@200 {
+					cpu-idle-states = <&C7>;
+				};
+
+				cpu@300 {
+					cpu-idle-states = <&C7>;
+				};
+
+				cpu@10000 {
+					cpu-idle-states = <&C7>;
+				};
+
+				cpu@10100 {
+					cpu-idle-states = <&C7>;
+				};
+
+				cpu@10200 {
+					cpu-idle-states = <&C7>;
+				};
+
+				cpu@10300 {
+					cpu-idle-states = <&C7>;
+				};
+
+				cpu@20000 {
+					cpu-idle-states = <&C7>;
+				};
+
+				cpu@20100 {
+					cpu-idle-states = <&C7>;
+				};
+
+				cpu@20200 {
+					cpu-idle-states = <&C7>;
+				};
+
+				cpu@20300 {
+					cpu-idle-states = <&C7>;
+				};
+			};
+
 			mgbe_vm_irq_config: mgbe-vm-irq-config {
 				nvidia,num-vm-irqs = <5>;
 				vm_irq1 {