| Message ID | 20210129061406.2680146-4-bleung@chromium.org |
|---|---|
| State | New |
| Headers | show |
| Series | usb: typec: and platform/chrome: Add PD revision numbers | expand |
On Thu, Jan 28, 2021 at 10:14:03PM -0800, Benson Leung wrote: > The partner's PD revision may be resolved later than the port partner > registration since the port partner creation may take place once > Type-C detects the port has changed state, but before PD communication is > completed. > > Add a setter so that the partner's PD revision can be attached to it once > it becomes available. > > If the revision is set to a valid version (not 0), the setter will also > refresh the partner's usb_pd flag and notify on "supports_usb_power_delivery" > sysfs property as well. > > Signed-off-by: Benson Leung <bleung@chromium.org> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> > --- > drivers/usb/typec/class.c | 30 ++++++++++++++++++++++++++++++ > include/linux/usb/typec.h | 1 + > 2 files changed, 31 insertions(+) > > diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c > index b5241f4756c2..b6ceab3dc16b 100644 > --- a/drivers/usb/typec/class.c > +++ b/drivers/usb/typec/class.c > @@ -748,6 +748,36 @@ int typec_partner_set_identity(struct typec_partner *partner) > } > EXPORT_SYMBOL_GPL(typec_partner_set_identity); > > +/** > + * typec_partner_set_pd_revision - Set the PD revision supported by the partner > + * @partner: The partner to be updated. > + * @pd_revision: USB Power Delivery Specification Revision supported by partner > + * > + * This routine is used to report that the PD revision of the port partner has > + * become available. > + * > + * Returns 0 on success or negative error number on failure. > + */ > +int typec_partner_set_pd_revision(struct typec_partner *partner, u16 pd_revision) > +{ > + int ret; > + > + if (partner->pd_revision == pd_revision) > + return 0; > + > + partner->pd_revision = pd_revision; > + sysfs_notify(&partner->dev.kobj, NULL, "usb_power_delivery_revision"); > + if (pd_revision != 0 && !partner->usb_pd) { > + partner->usb_pd = 1; > + sysfs_notify(&partner->dev.kobj, NULL, > + "supports_usb_power_delivery"); > + } > + kobject_uevent(&partner->dev.kobj, KOBJ_CHANGE); > + > + return 0; > +} > +EXPORT_SYMBOL_GPL(typec_partner_set_pd_revision); > + > /** > * typec_partner_set_num_altmodes - Set the number of available partner altmodes > * @partner: The partner to be updated. > diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h > index 42c6b7c07a99..4946eca742d5 100644 > --- a/include/linux/usb/typec.h > +++ b/include/linux/usb/typec.h > @@ -126,6 +126,7 @@ struct typec_altmode_desc { > enum typec_port_data roles; > }; > > +int typec_partner_set_pd_revision(struct typec_partner *partner, u16 pd_revision); > int typec_partner_set_num_altmodes(struct typec_partner *partner, int num_altmodes); > struct typec_altmode > *typec_partner_register_altmode(struct typec_partner *partner, > -- > 2.30.0.365.g02bc693789-goog thanks, -- heikki
diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c index b5241f4756c2..b6ceab3dc16b 100644 --- a/drivers/usb/typec/class.c +++ b/drivers/usb/typec/class.c @@ -748,6 +748,36 @@ int typec_partner_set_identity(struct typec_partner *partner) } EXPORT_SYMBOL_GPL(typec_partner_set_identity); +/** + * typec_partner_set_pd_revision - Set the PD revision supported by the partner + * @partner: The partner to be updated. + * @pd_revision: USB Power Delivery Specification Revision supported by partner + * + * This routine is used to report that the PD revision of the port partner has + * become available. + * + * Returns 0 on success or negative error number on failure. + */ +int typec_partner_set_pd_revision(struct typec_partner *partner, u16 pd_revision) +{ + int ret; + + if (partner->pd_revision == pd_revision) + return 0; + + partner->pd_revision = pd_revision; + sysfs_notify(&partner->dev.kobj, NULL, "usb_power_delivery_revision"); + if (pd_revision != 0 && !partner->usb_pd) { + partner->usb_pd = 1; + sysfs_notify(&partner->dev.kobj, NULL, + "supports_usb_power_delivery"); + } + kobject_uevent(&partner->dev.kobj, KOBJ_CHANGE); + + return 0; +} +EXPORT_SYMBOL_GPL(typec_partner_set_pd_revision); + /** * typec_partner_set_num_altmodes - Set the number of available partner altmodes * @partner: The partner to be updated. diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h index 42c6b7c07a99..4946eca742d5 100644 --- a/include/linux/usb/typec.h +++ b/include/linux/usb/typec.h @@ -126,6 +126,7 @@ struct typec_altmode_desc { enum typec_port_data roles; }; +int typec_partner_set_pd_revision(struct typec_partner *partner, u16 pd_revision); int typec_partner_set_num_altmodes(struct typec_partner *partner, int num_altmodes); struct typec_altmode *typec_partner_register_altmode(struct typec_partner *partner,
The partner's PD revision may be resolved later than the port partner registration since the port partner creation may take place once Type-C detects the port has changed state, but before PD communication is completed. Add a setter so that the partner's PD revision can be attached to it once it becomes available. If the revision is set to a valid version (not 0), the setter will also refresh the partner's usb_pd flag and notify on "supports_usb_power_delivery" sysfs property as well. Signed-off-by: Benson Leung <bleung@chromium.org> --- drivers/usb/typec/class.c | 30 ++++++++++++++++++++++++++++++ include/linux/usb/typec.h | 1 + 2 files changed, 31 insertions(+)