trogdor: Move the hibernate functions into separate files

Move the hiberante functions from baseboard.c and board.c to separate
hibernate.c files. This makes Zephyr easier to include the code.

BRANCH=None
BUG=b:183745774
TEST=Built the EC image and tested EC hibernate on Lazor.

Change-Id: Ic2f0a73687075c5d6c0dddbb329abea7a0f27053
Signed-off-by: Wai-Hong Tam <waihong@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2861057
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>

3 files changed, 40 insertions, 31 deletions

diff --git a/board/lazor/board.c b/board/lazor/board.c
index e9d5f101e3..4ad8cf51fe 100644
--- a/board/lazor/board.c
+++ b/board/lazor/board.c
@@ -393,37 +393,6 @@ static void board_init(void)
 }
 DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT);
 
-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);
-}
-
 /* Called on AP S0 -> S3 transition */
 static void board_chipset_suspend(void)
 {
diff --git a/board/lazor/build.mk b/board/lazor/build.mk
index b51eda7cfd..8cf8679e35 100644
--- a/board/lazor/build.mk
+++ b/board/lazor/build.mk
@@ -13,6 +13,7 @@ BASEBOARD:=trogdor
 
 board-y+=battery.o
 board-y+=board.o
+board-y+=hibernate.o
 board-y+=led.o
 board-y+=sku.o
 board-y+=switchcap.o
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);
+}