leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

platform/chrome: cros_ec_typec: Handle hard reset

Browse Source 
The Chrome Embedded Controller (EC) generates a hard reset type C event
when a USB Power Delivery (PD) hard reset is encountered. Handle this
event by unregistering the partner and cable on the associated port and
clearing the event flag.

Cc: Benson Leung <bleung@chromium.org>
Signed-off-by: Prashant Malani <pmalani@chromium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Link: https://lore.kernel.org/r/20210420171617.3830902-2-pmalani@chromium.org
This commit is contained in:
Prashant Malani 2021-04-20 10:16:13 -07:00 committed by Enric Balletbo i Serra
parent 67880f1bc3
commit 944b3a6395
1 changed files with 13 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/platform/chrome/cros_ec_typec.c
View File

@ -906,6 +906,19 @@ static void cros_typec_handle_status(struct cros_typec_data *typec, int port_num
return;
}
/* If we got a hard reset, unregister everything and return. */
if (resp.events & PD_STATUS_EVENT_HARD_RESET) {
cros_typec_remove_partner(typec, port_num);
cros_typec_remove_cable(typec, port_num);
ret = cros_typec_send_clear_event(typec, port_num,
PD_STATUS_EVENT_HARD_RESET);
if (ret < 0)
dev_warn(typec->dev,
"Failed hard reset event clear, port: %d\n", port_num);
return;
}
/* Handle any events appropriately. */
if (resp.events & PD_STATUS_EVENT_SOP_DISC_DONE && !typec->ports[port_num]->sop_disc_done) {
u16 sop_revision;