From b23f1c38c47ad85ec64906775d96ffdf7fc5eede Mon Sep 17 00:00:00 2001
From: Yi-Wei Wang <yiweiw@nvidia.com>
Date: Wed, 27 Sep 2023 13:57:48 +0800
Subject: [PATCH] t23x: overlay: Disable c7 cpuidle for safety IGX

Only c1 (WFI) is needed for safety IGX, so disable the c7 cpuidle
status. As per upstream cpuidle-psci.c driver, the default
archictectural back-end already executes WFI on idle entry, so the idle
driver won't be initialized if only WFI is supported.

Bug 4084478

Change-Id: Id870cf22a7e5806e7f96c566c9782d6c1620e09c
Signed-off-by: Yi-Wei Wang <yiweiw@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/device/hardware/nvidia/t23x-public-dts/+/2986366
Reviewed-by: Johnny Liu <johnliu@nvidia.com>
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
Tested-by: Johnny Liu <johnliu@nvidia.com>
---
 overlay/tegra234-p3740-0002+p3701-0008-safety.dts | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/overlay/tegra234-p3740-0002+p3701-0008-safety.dts b/overlay/tegra234-p3740-0002+p3701-0008-safety.dts
index ff16553..c8cbb47 100644
--- a/overlay/tegra234-p3740-0002+p3701-0008-safety.dts
+++ b/overlay/tegra234-p3740-0002+p3701-0008-safety.dts
@@ -81,6 +81,14 @@
 	fragment-t234-p3740-p3701-safety@2 {
 		target-path = "/";
 		__overlay__ {
+			cpus {
+				idle-states {
+					c7 {
+						status = "disabled";
+					};
+				};
+			};
+
 			thermal-zones {
 				cpu-thermal {
 					cooling-maps {