staging/fieldbus/dev_core.c

29 	struct fieldbus_dev *fb = dev_get_drvdata(dev);
31 	return sysfs_emit(buf, "%d\n", !!fb->online);
38 	struct fieldbus_dev *fb = dev_get_drvdata(dev);
40 	if (!fb->enable_get)
42 	return sysfs_emit(buf, "%d\n", !!fb->enable_get(fb));
48 	struct fieldbus_dev *fb = dev_get_drvdata(dev);
52 	if (!fb->simple_enable_set)
57 	ret = fb->simple_enable_set(fb, value);
67 	struct fieldbus_dev *fb = dev_get_drvdata(dev);
70 	return sysfs_emit(buf, "%s\n", fb->card_name);
77 	struct fieldbus_dev *fb = dev_get_drvdata(dev);
79 	return sysfs_emit(buf, "%zu\n", fb->read_area_sz);
86 	struct fieldbus_dev *fb = dev_get_drvdata(dev);
88 	return sysfs_emit(buf, "%zu\n", fb->write_area_sz);
95 	struct fieldbus_dev *fb = dev_get_drvdata(dev);
97 	return fb->fieldbus_id_get(fb, buf, PAGE_SIZE);
104 	struct fieldbus_dev *fb = dev_get_drvdata(dev);
107 	switch (fb->fieldbus_type) {
135 	struct fieldbus_dev *fb = dev_get_drvdata(dev);
140 		if (fb->enable_get)
142 		if (fb->simple_enable_set)
230 void fieldbus_dev_area_updated(struct fieldbus_dev *fb)
232 	fb->dc_event++;
233 	wake_up_all(&fb->dc_wq);
237 void fieldbus_dev_online_changed(struct fieldbus_dev *fb, bool online)
239 	fb->online = online;
240 	kobject_uevent(&fb->dev->kobj, KOBJ_CHANGE);
244 static void __fieldbus_dev_unregister(struct fieldbus_dev *fb)
246 	if (!fb)
248 	device_destroy(&fieldbus_class, fb->cdev.dev);
249 	cdev_del(&fb->cdev);
250 	ida_free(&fieldbus_ida, fb->id);
253 void fieldbus_dev_unregister(struct fieldbus_dev *fb)
256 	__fieldbus_dev_unregister(fb);
261 static int __fieldbus_dev_register(struct fieldbus_dev *fb)
266 	if (!fb)
268 	if (!fb->read_area || !fb->write_area || !fb->fieldbus_id_get)
270 	fb->id = ida_alloc_max(&fieldbus_ida, MAX_FIELDBUSES - 1, GFP_KERNEL);
271 	if (fb->id < 0)
272 		return fb->id;
273 	devno = MKDEV(MAJOR(fieldbus_devt), fb->id);
274 	init_waitqueue_head(&fb->dc_wq);
275 	cdev_init(&fb->cdev, &fieldbus_fops);
276 	err = cdev_add(&fb->cdev, devno, 1);
279 		       fb->id, MAJOR(fieldbus_devt), fb->id);
282 	fb->dev = device_create(&fieldbus_class, fb->parent, devno, fb,
283 				"fieldbus_dev%d", fb->id);
284 	if (IS_ERR(fb->dev)) {
285 		err = PTR_ERR(fb->dev);
291 	cdev_del(&fb->cdev);
293 	ida_free(&fieldbus_ida, fb->id);
297 int fieldbus_dev_register(struct fieldbus_dev *fb)
302 	err = __fieldbus_dev_register(fb);