1 files changed, 39 insertions, 0 deletions
diff --git a/board/lazor/hibernate.c b/board/lazor/hibernate.c
new file mode 100644
index 0000000000..2b9bfa44eb
--- /dev/null
+++ b/board/lazor/hibernate.c
@@ -0,0 +1,39 @@
+/* Copyright 2021 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "common.h"
+#include "system.h"
+#include "usbc_ppc.h"
+
+void board_hibernate(void)
+{
+	int i;
+
+	if (!board_is_clamshell()) {
+		/*
+		 * Sensors are unpowered in hibernate. Apply PD to the
+		 * interrupt lines such that they don't float.
+		 */
+		gpio_set_flags(GPIO_ACCEL_GYRO_INT_L,
+			       GPIO_INPUT | GPIO_PULL_DOWN);
+		gpio_set_flags(GPIO_LID_ACCEL_INT_L,
+			       GPIO_INPUT | GPIO_PULL_DOWN);
+	}
+
+	/*
+	 * Board rev 5+ has the hardware fix. Don't need the following
+	 * workaround.
+	 */
+	if (system_get_board_version() >= 5)
+		return;
+
+	/*
+	 * Enable the PPC power sink path before EC enters hibernate;
+	 * otherwise, ACOK won't go High and can't wake EC up. Check the
+	 * bug b/170324206 for details.
+	 */
+	for (i = 0; i < CONFIG_USB_PD_PORT_MAX_COUNT; i++)
+		ppc_vbus_sink_enable(i, 1);
+}