On 11/17/2025 4:33 PM, Heikki Krogerus wrote:
Tue, Nov 11, 2025 at 06:50:31PM +0800, Chaoyi Chen kirjoitti:
From: Chaoyi Chen <[email protected]>
Some other part of kernel may want to know the event of typec bus.
This patch add common notifier function to notify these event.
Signed-off-by: Chaoyi Chen <[email protected]>
---
Changes in v9:
- Remove redundant header files.
Changes in v8:
- Fix coding style.
drivers/usb/typec/Makefile | 2 +-
drivers/usb/typec/bus.h | 2 ++
drivers/usb/typec/class.c | 2 ++
drivers/usb/typec/notify.c | 23 +++++++++++++++++++++++
include/linux/usb/typec_altmode.h | 9 +++++++++
5 files changed, 37 insertions(+), 1 deletion(-)
create mode 100644 drivers/usb/typec/notify.c
diff --git a/drivers/usb/typec/Makefile b/drivers/usb/typec/Makefile
index 7a368fea61bc..20d09c5314d7 100644
--- a/drivers/usb/typec/Makefile
+++ b/drivers/usb/typec/Makefile
@@ -1,6 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_TYPEC) += typec.o
-typec-y := class.o mux.o bus.o pd.o retimer.o
+typec-y := class.o mux.o notify.o bus.o pd.o
retimer.o
typec-$(CONFIG_ACPI) += port-mapper.o
obj-$(CONFIG_TYPEC) += altmodes/
obj-$(CONFIG_TYPEC_TCPM) += tcpm/
diff --git a/drivers/usb/typec/bus.h b/drivers/usb/typec/bus.h
index 643b8c81786d..820b59b6d434 100644
--- a/drivers/usb/typec/bus.h
+++ b/drivers/usb/typec/bus.h
@@ -26,6 +26,8 @@ struct altmode {
struct altmode *plug[2];
};
+void typec_notify_event(unsigned long event, void *data);
+
#define to_altmode(d) container_of(d, struct altmode, adev)
extern const struct bus_type typec_bus;
diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
index 9b2647cb199b..9d2aa3dd3f56 100644
--- a/drivers/usb/typec/class.c
+++ b/drivers/usb/typec/class.c
@@ -600,6 +600,8 @@ typec_register_altmode(struct device *parent,
return ERR_PTR(ret);
}
+ typec_notify_event(TYPEC_ALTMODE_REGISTERED, &alt->adev);
+
return &alt->adev;
}
You need to also send TYPEC_ALTMODE_UNREGISTERED notification in
typec_unregister_altmode().
Sorry, I left that out. I will fix this in v10. Thank you.
--
Best,
Chaoyi
