HID: vivaldi: convert to use dev_groups

There is no need for a driver to individually add/create device groups,
the driver core will do it automatically for you. Convert the
hid-vivaldi core driver to use the dev_groups pointer instead of
manually calling the driver core to create the group and have it be
cleaned up later on by the devm core.

Cc: Jiri Kosina <[e-mail]>
Cc: Benjamin Tissoires <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>
Signed-off-by: Jiri Kosina <[e-mail]>

drivers/hid/hid-google-hammer.c

···
 	.probe = hammer_probe,
 	.remove = hammer_remove,
 	.feature_mapping = vivaldi_feature_mapping,
-	.input_configured = vivaldi_input_configured,
 	.input_mapping = hammer_input_mapping,
 	.event = hammer_event,
+	.driver = {
+		.dev_groups = vivaldi_attribute_groups,
+	},
 };
 
 static int __init hammer_init(void)

drivers/hid/hid-vivaldi-common.c

···
 	NULL
 };
 
-static const struct attribute_group vivaldi_attribute_group = {
-	.attrs = vivaldi_sysfs_attrs,
-};
-
-/**
- * vivaldi_input_configured - Complete initialization of device using vivaldi map
- * @hdev: HID device to which vivaldi attributes should be attached
- * @hidinput: HID input device (unused)
- */
-int vivaldi_input_configured(struct hid_device *hdev,
-			     struct hid_input *hidinput)
+static umode_t vivaldi_is_visible(struct kobject *kobj, struct attribute *attr,
+				  int n)
 {
+	struct hid_device *hdev = to_hid_device(kobj_to_dev(kobj));
 	struct vivaldi_data *data = hid_get_drvdata(hdev);
 
 	if (!data->num_function_row_keys)
 		return 0;
-
-	return devm_device_add_group(&hdev->dev, &vivaldi_attribute_group);
+	return attr->mode;
 }
-EXPORT_SYMBOL_GPL(vivaldi_input_configured);
+
+static const struct attribute_group vivaldi_attribute_group = {
+	.attrs = vivaldi_sysfs_attrs,
+	.is_visible = vivaldi_is_visible,
+};
+
+const struct attribute_group *vivaldi_attribute_groups[] = {
+	&vivaldi_attribute_group,
+	NULL,
+};
+EXPORT_SYMBOL_GPL(vivaldi_attribute_groups);
 
 MODULE_LICENSE("GPL");

drivers/hid/hid-vivaldi-common.h

···
 
 struct hid_device;
 struct hid_field;
-struct hid_input;
 struct hid_usage;
 
 void vivaldi_feature_mapping(struct hid_device *hdev,
 			     struct hid_field *field, struct hid_usage *usage);
 
-int vivaldi_input_configured(struct hid_device *hdev,
-			     struct hid_input *hidinput);
+extern const struct attribute_group *vivaldi_attribute_groups[];
 
 #endif /* _HID_VIVALDI_COMMON_H */

drivers/hid/hid-vivaldi.c

···
 	.id_table = vivaldi_table,
 	.probe = vivaldi_probe,
 	.feature_mapping = vivaldi_feature_mapping,
-	.input_configured = vivaldi_input_configured,
+	.driver = {
+		.dev_groups = vivaldi_attribute_groups,
+	},
 };
 
 module_hid_driver(hid_vivaldi);