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 <ble...@chromium.org> Signed-off-by: Prashant Malani <pmal...@chromium.org> --- Changes in v3: - No changes. Changes in v2: - Split the header change into a separate patch. - Updated the commit message to reflect the above. v1: https://lore.kernel.org/lkml/20210415021456.1805797-1-pmal...@chromium.org/ drivers/platform/chrome/cros_ec_typec.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c index d3df1717a5fd..22052f569f2a 100644 --- a/drivers/platform/chrome/cros_ec_typec.c +++ b/drivers/platform/chrome/cros_ec_typec.c @@ -905,6 +905,19 @@ 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; -- 2.31.1.368.gbe11c130af-goog
