[PATCH] arm64: dts: qcom: x1e80100: add system power domain SS3 state

[Val Packett <val@packett.cool>]

Add the same PSCI state as seen on other Oryon-based SoCs like SM8750
and Glymur, seems to work fine on Hamoa as well.

Signed-off-by: Val Packett <val@packett.cool>
---
Tested on a Dell Latitude 7455:

/sys/kernel/debug/pm_genpd/power-domain-system/idle_states:
State          Time Spent(ms) Usage      Rejected   Above      Below
S0             69476          23006      195        21562      0

Seems to mostly be used in system suspend, though I've occasionally seen
the counter increment a little bit during runtime as well.
---
 arch/arm64/boot/dts/qcom/x1e80100.dtsi | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/x1e80100.dtsi b/arch/arm64/boot/dts/qcom/x1e80100.dtsi
index 3cf2568def3f..fab8104147bd 100644
--- a/arch/arm64/boot/dts/qcom/x1e80100.dtsi
+++ b/arch/arm64/boot/dts/qcom/x1e80100.dtsi
@@ -303,6 +303,14 @@ cluster_cl5: cluster-sleep-1 {
 				exit-latency-us = <4000>;
 				min-residency-us = <7000>;
 			};
+
+			domain_ss3: domain-sleep-0 {
+				compatible = "domain-idle-state";
+				arm,psci-suspend-param = <0x0200c354>;
+				entry-latency-us = <2800>;
+				exit-latency-us = <4400>;
+				min-residency-us = <10150>;
+			};
 		};
 	};
 
@@ -449,7 +457,7 @@ cluster_pd2: power-domain-cpu-cluster2 {
 
 		system_pd: power-domain-system {
 			#power-domain-cells = <0>;
-			/* TODO: system-wide idle states */
+			domain-idle-states = <&domain_ss3>;
 		};
 	};
 
-- 
2.51.0