greybus: control: implement disconnecting operation

Implement the new disconnecting control operation needed for proper
connection tear down.

Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/staging/greybus/greybus_protocols.h b/drivers/staging/greybus/greybus_protocols.h
index b98f02c..216a1d1 100644
--- a/drivers/staging/greybus/greybus_protocols.h
+++ b/drivers/staging/greybus/greybus_protocols.h
@@ -123,6 +123,7 @@ struct gb_protocol_version_response {
 #define GB_CONTROL_TYPE_TIMESYNC_AUTHORITATIVE	0x09
 /*	Unused					0x0a */
 #define GB_CONTROL_TYPE_BUNDLE_VERSION		0x0b
+#define GB_CONTROL_TYPE_DISCONNECTING		0x0c
 #define GB_CONTROL_TYPE_TIMESYNC_GET_LAST_EVENT	0x0d
 #define GB_CONTROL_TYPE_MODE_SWITCH		0x0e
 
@@ -160,6 +161,11 @@ struct gb_control_connected_request {
 	__le16			cport_id;
 } __packed;
 
+struct gb_control_disconnecting_request {
+	__le16			cport_id;
+} __packed;
+/* disconnecting response has no payload */
+
 struct gb_control_disconnected_request {
 	__le16			cport_id;
 } __packed;