Commit 29b01295 authored by Benson Leung's avatar Benson Leung Committed by Greg Kroah-Hartman
Browse files

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: default avatarHeikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: default avatarBenson Leung <bleung@chromium.org>
Link: https://lore.kernel.org/r/20210129061406.2680146-4-bleung@chromium.org


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent f5030e25

drivers/usb/typec/class.c

+30 −0
Original line number Diff line number Diff line
@@ -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.

include/linux/usb/typec.h

+1 −0
Original line number Diff line number Diff line
@@ -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,