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@xxxxxxxxxxxx>
---
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
