diff options
| author | Benson Leung <bleung@chromium.org> | 2021-01-28 22:14:03 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-02-01 15:31:34 +0100 |
| commit | 29b01295a829fba7399ee84afff4e64660e49f04 (patch) | |
| tree | fbe00c3a9094e0cbc320ef5de7d5438db217532d /drivers/usb/typec | |
| parent | f5030e252687be6e999bd52feb1f79d515b2f684 (diff) | |
usb: typec: Add typec_partner_set_pd_revision
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.
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Benson Leung <bleung@chromium.org>
Link: https://lore.kernel.org/r/20210129061406.2680146-4-bleung@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/typec')
| -rw-r--r-- | drivers/usb/typec/class.c | 30 |
1 files changed, 30 insertions, 0 deletions
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 @@ -749,6 +749,36 @@ 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. * @num_altmodes: The number of altmodes we want to specify as available. |