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authorPrashant Malani <pmalani@chromium.org>2021-04-20 20:16:13 +0300
committerEnric Balletbo i Serra <enric.balletbo@collabora.com>2021-04-20 20:35:42 +0300
commit944b3a639573796debe3cd47298a5dd79810be73 (patch)
tree703048dac0910ad9454b40e9d5c595d864ed7ffe /drivers/platform
parent67880f1bc342ed4c94e72cad7f8ca76e5121aae3 (diff)
downloadlinux-944b3a639573796debe3cd47298a5dd79810be73.tar.xz
platform/chrome: cros_ec_typec: Handle hard reset
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
Diffstat (limited to 'drivers/platform')
-rw-r--r--drivers/platform/chrome/cros_ec_typec.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c
index 1a06b8c80f80..60c21911a6c8 100644
--- a/drivers/platform/chrome/cros_ec_typec.c
+++ b/drivers/platform/chrome/cros_ec_typec.c
@@ -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;