diff --git a/bindings/pci/pci-msm.txt b/bindings/pci/pci-msm.txt
index 464a61b8..cdf1976c 100644
--- a/bindings/pci/pci-msm.txt
+++ b/bindings/pci/pci-msm.txt
@@ -265,6 +265,11 @@ interconnects:
 	Value type: <bool>
 	Definition: L1 sub-state (L1ss) is not supported
 
+- qcom,apss-based-l1ss-sleep:
+	Usage: optional
+	Value type: <bool>
+	Definition: Apss based L1ss sleep is supported
+
 - qcom,no-aux-clk-sync:
 	Usage: optional
 	Value type: <bool>
diff --git a/qcom/kalamap-hdk.dtsi b/qcom/kalamap-hdk.dtsi
index 56db337e..a2342d72 100644
--- a/qcom/kalamap-hdk.dtsi
+++ b/qcom/kalamap-hdk.dtsi
@@ -35,4 +35,5 @@
 
 &pcie1 {
 	qcom,boot-option = <0x2>;
+	qcom,apss-based-l1ss-sleep;
 };
diff --git a/qcom/kalamap-sg-hhg.dtsi b/qcom/kalamap-sg-hhg.dtsi
index 8db68a41..1c231a2b 100644
--- a/qcom/kalamap-sg-hhg.dtsi
+++ b/qcom/kalamap-sg-hhg.dtsi
@@ -14,6 +14,7 @@
 &pcie1 {
 	vreg-3p3-supply = <&nvme_vreg>;
 	qcom,boot-option = <0x2>;
+	qcom,apss-based-l1ss-sleep;
 };
 
 &regulator_ocp_notifier {