greybus: control: add bundle deactivate and activate operation

Add the AP implementation for the Greybus Control Bundle Deactivate
Operation. This operation requests a Bundle to enter the BUNDLE_OFF
state. All Connections associated with the Bundle must be closed prior
sending this operation.

Add the AP implementation for the Greybus Control Bundle Activate
Operation. This operation requests a specific Bundle to transition from
the BUNDLE_OFF state to the BUNDLE_ACTIVE state.

[elder@linaro.org: fixed a typo pointed out by Johan]
Signed-off-by: David Lin <dtwlin@google.com>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Alex Elder <elder@linaro.org>

drivers/staging/greybus/control.c

@@ -298,6 +298,56 @@ int gb_control_bundle_resume(struct gb_control *control, u8 bundle_id)
 	return 0;
 }
 
+int gb_control_bundle_deactivate(struct gb_control *control, u8 bundle_id)
+{
+	struct gb_control_bundle_pm_request request;
+	struct gb_control_bundle_pm_response response;
+	int ret;
+
+	request.bundle_id = bundle_id;
+	ret = gb_operation_sync(control->connection,
+				GB_CONTROL_TYPE_BUNDLE_DEACTIVATE, &request,
+				sizeof(request), &response, sizeof(response));
+	if (ret) {
+		dev_err(&control->dev,
+			"failed to send bundle deactivate: %d\n", ret);
+		return ret;
+	}
+
+	if (response.status != GB_CONTROL_BUNDLE_PM_OK) {
+		dev_err(&control->dev,
+			"bundle error while deactivating: %d\n", response.status);
+		return gb_control_bundle_pm_status_map(response.status);
+	}
+
+	return 0;
+}
+
+int gb_control_bundle_activate(struct gb_control *control, u8 bundle_id)
+{
+	struct gb_control_bundle_pm_request request;
+	struct gb_control_bundle_pm_response response;
+	int ret;
+
+	request.bundle_id = bundle_id;
+	ret = gb_operation_sync(control->connection,
+				GB_CONTROL_TYPE_BUNDLE_ACTIVATE, &request,
+				sizeof(request), &response, sizeof(response));
+	if (ret) {
+		dev_err(&control->dev,
+			"failed to send bundle activate: %d\n", ret);
+		return ret;
+	}
+
+	if (response.status != GB_CONTROL_BUNDLE_PM_OK) {
+		dev_err(&control->dev,
+			"bundle error while activating: %d\n", response.status);
+		return gb_control_bundle_pm_status_map(response.status);
+	}
+
+	return 0;
+}
+
 static ssize_t vendor_string_show(struct device *dev,
 			struct device_attribute *attr, char *buf)
 {

drivers/staging/greybus/control.h

@@ -54,4 +54,6 @@ int gb_control_timesync_authoritative(struct gb_control *control,
 				      u64 *frame_time);
 int gb_control_bundle_suspend(struct gb_control *control, u8 bundle_id);
 int gb_control_bundle_resume(struct gb_control *control, u8 bundle_id);
+int gb_control_bundle_deactivate(struct gb_control *control, u8 bundle_id);
+int gb_control_bundle_activate(struct gb_control *control, u8 bundle_id);
 #endif /* __CONTROL_H */

drivers/staging/greybus/greybus_protocols.h

@@ -128,6 +128,8 @@ struct gb_protocol_version_response {
 #define GB_CONTROL_TYPE_MODE_SWITCH		0x0e
 #define GB_CONTROL_TYPE_BUNDLE_SUSPEND		0x0f
 #define GB_CONTROL_TYPE_BUNDLE_RESUME		0x10
+#define GB_CONTROL_TYPE_BUNDLE_DEACTIVATE	0x11
+#define GB_CONTROL_TYPE_BUNDLE_ACTIVATE		0x12
 
 struct gb_control_version_request {
 	__u8	major;