1 files changed, 24 insertions, 0 deletions
diff --git a/src/mainboard/google/brya/mainboard.asl b/src/mainboard/google/brya/mainboard.asl
new file mode 100644
index 0000000000..c60db3081c
--- /dev/null
+++ b/src/mainboard/google/brya/mainboard.asl
@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <baseboard/gpio.h>
+
+/*
+ * S0ix Entry/Exit Notifications
+ * Called from \_SB.PEPD._DSM
+ */
+Method (MS0X, 1, Serialized)
+{
+	If (Arg0 == 1) {
+		/*
+		 * On S0ix entry, clear the SLP_S0_GATE pin, so that the rest of
+		 * the platform can transition to its low power state as well.
+		 */
+		\_SB.PCI0.CTXS(GPIO_SLP_S0_GATE);
+	} Else {
+		/*
+		 * On S0ix exit, set the SLP_S0_GATE pin, so that the rest of
+		 * the platform will resume from its low power state.
+		 */
+		\_SB.PCI0.STXS(GPIO_SLP_S0_GATE);
+	}
+}