sdca_dev
struct sdca_dev;
struct sdca_dev *func_dev;
struct sdca_dev *sdev = auxiliary_dev_to_sdca_dev(auxdev);
static struct sdca_dev *sdca_dev_register(struct device *parent,
struct sdca_dev *sdev;
static void sdca_dev_unregister(struct sdca_dev *sdev)
struct sdca_dev *func_dev;
container_of(auxiliary_dev, struct sdca_dev, auxdev)