Add samsung specific changes

include/linux/external_notify.h

@@ -0,0 +1,79 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ *
+ * header file supporting usb notify layer
+ * external notify call chain information
+ *
+ * Copyright (C) 2016-2023 Samsung Electronics
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ */
+
+  /* usb notify layer v4.0 */
+
+#ifndef __EXTERNAL_NOTIFY_H__
+#define __EXTERNAL_NOTIFY_H__
+
+#include <linux/notifier.h>
+
+/* external notifier call chain command */
+enum external_notify_cmd {
+	EXTERNAL_NOTIFY_3S_NODEVICE = 1,
+	EXTERNAL_NOTIFY_DEVICE_CONNECT,
+	EXTERNAL_NOTIFY_HOSTBLOCK_PRE,
+	EXTERNAL_NOTIFY_HOSTBLOCK_POST,
+	EXTERNAL_NOTIFY_MDMBLOCK_PRE,
+	EXTERNAL_NOTIFY_MDMBLOCK_POST,
+	EXTERNAL_NOTIFY_POWERROLE,
+	EXTERNAL_NOTIFY_DEVICEADD,
+	EXTERNAL_NOTIFY_HOSTBLOCK_EARLY,
+	EXTERNAL_NOTIFY_VBUS_RESET,
+	EXTERNAL_NOTIFY_POSSIBLE_USB,
+};
+
+/* external notifier call sequence,
+ * largest priority number device will be called first.
+ */
+enum external_notify_device {
+	EXTERNAL_NOTIFY_DEV_MUIC,
+	EXTERNAL_NOTIFY_DEV_CHARGER,
+	EXTERNAL_NOTIFY_DEV_PDIC,
+	EXTERNAL_NOTIFY_DEV_MANAGER,
+};
+
+enum external_notify_condev {
+	EXTERNAL_NOTIFY_NONE = 0,
+	EXTERNAL_NOTIFY_GPAD,
+	EXTERNAL_NOTIFY_LANHUB,
+};
+
+#ifdef CONFIG_USB_EXTERNAL_NOTIFY
+extern int send_external_notify(unsigned long cmd, int data);
+extern int usb_external_notify_register(struct notifier_block *nb,
+		notifier_fn_t notifier, int listener);
+extern int usb_external_notify_unregister(struct notifier_block *nb);
+extern void external_notifier_init(void);
+#else
+static inline int send_external_notify(unsigned long cmd,
+			int data) {return 0; }
+static inline int usb_external_notify_register(struct notifier_block *nb,
+			notifier_fn_t notifier, int listener) {return 0; }
+static inline int usb_external_notify_unregister(struct notifier_block *nb)
+			{return 0; }
+static inline void external_notifier_init(void) {}
+#endif
+
+#endif /* __EXTERNAL_NOTIFY_H__ */