1 files changed, 55 insertions, 0 deletions
diff --git a/zephyr/program/nissa/gothrax/src/charger.c b/zephyr/program/nissa/gothrax/src/charger.c
new file mode 100644
index 0000000000..c8b09bd82c
--- /dev/null
+++ b/zephyr/program/nissa/gothrax/src/charger.c
@@ -0,0 +1,55 @@
+/* Copyright 2022 The ChromiumOS Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "battery.h"
+#include "charger.h"
+#include "console.h"
+#include "driver/charger/sm5803.h"
+#include "extpower.h"
+#include "usb_pd.h"
+
+#include <zephyr/logging/log.h>
+
+LOG_MODULE_DECLARE(nissa, CONFIG_NISSA_LOG_LEVEL);
+
+int extpower_is_present(void)
+{
+	int port;
+	int rv;
+	bool acok;
+
+	for (port = 0; port < board_get_usb_pd_port_count(); port++) {
+		rv = sm5803_is_acok(port, &acok);
+		if ((rv == EC_SUCCESS) && acok)
+			return 1;
+	}
+
+	return 0;
+}
+
+/*
+ * Nereid does not have a GPIO indicating whether extpower is present,
+ * so detect using the charger(s).
+ */
+__override void board_check_extpower(void)
+{
+	static int last_extpower_present;
+	int extpower_present = extpower_is_present();
+
+	if (last_extpower_present ^ extpower_present)
+		extpower_handle_update(extpower_present);
+
+	last_extpower_present = extpower_present;
+}
+
+__override void board_hibernate(void)
+{
+	/* Shut down the chargers */
+	if (board_get_usb_pd_port_count() == 2)
+		sm5803_hibernate(CHARGER_SECONDARY);
+	sm5803_hibernate(CHARGER_PRIMARY);
+	LOG_INF("Charger(s) hibernated");
+	cflush();
+}