* @dma_mem: Internal for coherent mem override.
* @archdata: For arch-specific additions.
* @of_node: Associated device tree node.
- * @of_match: Matching of_device_id from driver.
* @devt: For creating the sysfs "dev".
* @devres_lock: Spinlock to protect the resource of the device.
* @devres_head: The resources list of the device.