tda7540_ioctl_cmd.h

基于tda7540芯片的FM芯片

#include <linux/ioctl.h>

#define TDA7540_MAGIC 'k'
#define TDA7540_INIT                 _IO(TDA7540_MAGIC, 1)
#define TDA7540_SET_FREQ             _IOW(TDA7540_MAGIC,2,int)
#define TDA7540_GET_FREQ             _IOR(TDA7540_MAGIC,3,int)