mb862xx_l1_cfg
#define MB862XX_L1_GET_CFG _IOR(MB862XX_BASE, 0, struct mb862xx_l1_cfg*)
#define MB862XX_L1_SET_CFG _IOW(MB862XX_BASE, 1, struct mb862xx_l1_cfg*)
struct mb862xx_l1_cfg l1_cfg;
struct mb862xx_l1_cfg *l1_cfg = &par->l1_cfg;