Commit 4616dddc authored by Saranya Gopal's avatar Saranya Gopal Committed by Greg Kroah-Hartman
Browse files

usb: typec: ucsi: Expose number of alternate modes in partner 



Type-c class provides an option to expose the number of alternate
modes in the port partner as a sysfs interface. Use that to
expose the number of alternate modes in the port partner from
the ucsi driver.

Reviewed-by: default avatarHeikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: default avatarRajaram Regupathy <rajaram.regupathy@intel.com>
Signed-off-by: default avatarSaranya Gopal <saranya.gopal@intel.com>
Link: https://lore.kernel.org/r/20211116103613.31349-1-saranya.gopal@intel.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 0d8cfeee

drivers/usb/typec/ucsi/ucsi.c

+15 −1
Original line number Diff line number Diff line
@@ -303,6 +303,17 @@ static int ucsi_next_altmode(struct typec_altmode **alt) 
	return -ENOENT;

}



static int ucsi_get_num_altmode(struct typec_altmode **alt)

{

	int i;



	for (i = 0; i < UCSI_MAX_ALTMODES; i++)

		if (!alt[i])

			break;



	return i;

}



static int ucsi_register_altmode(struct ucsi_connector *con,

				 struct typec_altmode_desc *desc,

				 u8 recipient)
@@ -607,7 +618,7 @@ static int ucsi_get_src_pdos(struct ucsi_connector *con) 


static int ucsi_check_altmodes(struct ucsi_connector *con)

{

	int ret;

	int ret, num_partner_am;



	ret = ucsi_register_altmodes(con, UCSI_RECIPIENT_SOP);

	if (ret && ret != -ETIMEDOUT)
@@ -617,6 +628,9 @@ static int ucsi_check_altmodes(struct ucsi_connector *con) 


	/* Ignoring the errors in this case. */

	if (con->partner_altmode[0]) {

		num_partner_am = ucsi_get_num_altmode(con->partner_altmode);

		if (num_partner_am > 0)

			typec_partner_set_num_altmodes(con->partner, num_partner_am);

		ucsi_altmode_update_active(con);

		return 0;

	}