Subject: [PATCH v11 02/11] usb: typec: Export typec bus and typec altmode device type

From: Chaoyi Chen <[email-masked]>
Date: Fri, 28 Nov 2025 10:03:56 +0800

From: Chaoyi Chen <[email-masked]>

The DRM may want to register a notifier on the typec bus to know when
a typec altmode device is added, and distinguish between different
types of typec altmode device.

Export these things.

Signed-off-by: Chaoyi Chen <[email-masked]>
---

Changes in v11:
- Also export typec bus.
- Add more detailed comments.

(no changes since v9)

 drivers/usb/typec/bus.c           |  1 +
 drivers/usb/typec/bus.h           | 10 ----------
 drivers/usb/typec/class.c         |  3 +++
 include/linux/usb/typec.h         |  3 +++
 include/linux/usb/typec_altmode.h |  8 ++++++++
 5 files changed, 15 insertions(+), 10 deletions(-)

diff --git a/drivers/usb/typec/bus.c b/drivers/usb/typec/bus.c
index a33da7f458a5..e84b134a3381 100644
--- a/drivers/usb/typec/bus.c
+++ b/drivers/usb/typec/bus.c
@@ -569,3 +569,4 @@ const struct bus_type typec_bus = {
 	.probe = typec_probe,
 	.remove = typec_remove,
 };
+EXPORT_SYMBOL_GPL(typec_bus);
diff --git a/drivers/usb/typec/bus.h b/drivers/usb/typec/bus.h
index b58e131450d1..7df5deb1dd3a 100644
--- a/drivers/usb/typec/bus.h
+++ b/drivers/usb/typec/bus.h
@@ -5,7 +5,6 @@
 
 #include <linux/usb/typec_altmode.h>
 
-struct bus_type;
 struct typec_mux;
 struct typec_retimer;
 
@@ -28,13 +27,4 @@ struct altmode {
 
 #define to_altmode(d) container_of(d, struct altmode, adev)
 
-extern const struct bus_type typec_bus;
-extern const struct device_type typec_port_altmode_dev_type;
-extern const struct device_type typec_plug_altmode_dev_type;
-extern const struct device_type typec_partner_altmode_dev_type;
-
-#define is_typec_port_altmode(dev) ((dev)->type == &typec_port_altmode_dev_type)
-#define is_typec_plug_altmode(dev) ((dev)->type == &typec_plug_altmode_dev_type)
-#define is_typec_partner_altmode(dev) ((dev)->type == &typec_partner_altmode_dev_type)
-
 #endif /* __USB_TYPEC_ALTMODE_H__ */
diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
index d6b88317f8a4..c4ff4310ff58 100644
--- a/drivers/usb/typec/class.c
+++ b/drivers/usb/typec/class.c
@@ -537,18 +537,21 @@ const struct device_type typec_port_altmode_dev_type = {
 	.groups = typec_altmode_groups,
 	.release = typec_altmode_release,
 };
+EXPORT_SYMBOL_GPL(typec_port_altmode_dev_type);
 
 const struct device_type typec_plug_altmode_dev_type = {
 	.name = "typec_plug_alternate_mode",
 	.groups = typec_altmode_groups,
 	.release = typec_altmode_release,
 };
+EXPORT_SYMBOL_GPL(typec_plug_altmode_dev_type);
 
 const struct device_type typec_partner_altmode_dev_type = {
 	.name = "typec_partner_alternate_mode",
 	.groups = typec_altmode_groups,
 	.release = typec_altmode_release,
 };
+EXPORT_SYMBOL_GPL(typec_partner_altmode_dev_type);
 
 static struct typec_altmode *
 typec_register_altmode(struct device *parent,
diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h
index 309251572e2e..c6fd46902fce 100644
--- a/include/linux/usb/typec.h
+++ b/include/linux/usb/typec.h
@@ -20,12 +20,15 @@ struct typec_port;
 struct typec_altmode_ops;
 struct typec_cable_ops;
 
+struct bus_type;
 struct fwnode_handle;
 struct device;
 
 struct usb_power_delivery;
 struct usb_power_delivery_desc;
 
+extern const struct bus_type typec_bus;
+
 enum typec_port_type {
 	TYPEC_PORT_SRC,
 	TYPEC_PORT_SNK,
diff --git a/include/linux/usb/typec_altmode.h b/include/linux/usb/typec_altmode.h
index f7db3bd4c90e..9197a4637a93 100644
--- a/include/linux/usb/typec_altmode.h
+++ b/include/linux/usb/typec_altmode.h
@@ -9,6 +9,14 @@
 
 #define MODE_DISCOVERY_MAX	6
 
+extern const struct device_type typec_port_altmode_dev_type;
+extern const struct device_type typec_plug_altmode_dev_type;
+extern const struct device_type typec_partner_altmode_dev_type;
+
+#define is_typec_port_altmode(dev) ((dev)->type == &typec_port_altmode_dev_type)
+#define is_typec_plug_altmode(dev) ((dev)->type == &typec_plug_altmode_dev_type)
+#define is_typec_partner_altmode(dev) ((dev)->type == &typec_partner_altmode_dev_type)
+
 struct typec_altmode_ops;
 
 /**
-- 
2.51.1