| Message ID | a2b04d69396c9522327f6c0f22637a83161a5fe9.1689148711.git.quic_schowdhu@quicinc.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | Add notifier call chain to Embedded USB Debug(EUD) driver | expand |
On Wed, Jul 12, 2023 at 01:52:38PM +0530, Souradeep Chowdhury wrote: > Add the interface for notifier calls that can be made to check the role > switch status of EUD. An external module can import this file and use the > wrapper functions eud_register_notify to register a notifier to the EUD > notifier chain, eud_unregister_notify to unregister the notifier from the > chain, eud_notifier_call_chain to call the notifier chain to check the > status of role-switch. These interfaces are provided to handle the case > where multiple modules might go for a role-switch on the same port in which > case EUD will be given priority over the rest. > > Signed-off-by: Souradeep Chowdhury <quic_schowdhu@quicinc.com> > --- > drivers/usb/misc/qcom_eud_notifier.h | 10 ++++++++++ > 1 file changed, 10 insertions(+) > create mode 100644 drivers/usb/misc/qcom_eud_notifier.h > > diff --git a/drivers/usb/misc/qcom_eud_notifier.h b/drivers/usb/misc/qcom_eud_notifier.h > new file mode 100644 > index 000000000000..0cae42a5f6bf > --- /dev/null > +++ b/drivers/usb/misc/qcom_eud_notifier.h > @@ -0,0 +1,10 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * Released under the GPLv2 only. > + */ > + > +#include <linux/notifier.h> > + > +extern int eud_register_notify(struct notifier_block *nb); > +extern void eud_unregister_notify(struct notifier_block *nb); > +extern void eud_notifier_call_chain(unsigned long role_switch_state); > -- > 2.17.1 > Don't add .h files that no one actually use.
diff --git a/drivers/usb/misc/qcom_eud_notifier.h b/drivers/usb/misc/qcom_eud_notifier.h new file mode 100644 index 000000000000..0cae42a5f6bf --- /dev/null +++ b/drivers/usb/misc/qcom_eud_notifier.h @@ -0,0 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Released under the GPLv2 only. + */ + +#include <linux/notifier.h> + +extern int eud_register_notify(struct notifier_block *nb); +extern void eud_unregister_notify(struct notifier_block *nb); +extern void eud_notifier_call_chain(unsigned long role_switch_state);
Add the interface for notifier calls that can be made to check the role switch status of EUD. An external module can import this file and use the wrapper functions eud_register_notify to register a notifier to the EUD notifier chain, eud_unregister_notify to unregister the notifier from the chain, eud_notifier_call_chain to call the notifier chain to check the status of role-switch. These interfaces are provided to handle the case where multiple modules might go for a role-switch on the same port in which case EUD will be given priority over the rest. Signed-off-by: Souradeep Chowdhury <quic_schowdhu@quicinc.com> --- drivers/usb/misc/qcom_eud_notifier.h | 10 ++++++++++ 1 file changed, 10 insertions(+) create mode 100644 drivers/usb/misc/qcom_eud_notifier.h