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

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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: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Rajaram Regupathy <rajaram.regupathy@intel.com>
Signed-off-by: Saranya Gopal <saranya.gopal@intel.com>
Link: https://lore.kernel.org/r/20211116103613.31349-1-saranya.gopal@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Saranya Gopal
2021-11-16 16:06:13 +05:30
committed by Greg Kroah-Hartman
parent 0d8cfeeef3
commit 4616dddcfa
1 changed files with 15 additions and 1 deletions
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16
drivers/usb/typec/ucsi/ucsi.c
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@@ -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;
}