hi3531调用sil9024的驱动

//测试mao
 printf("\n\n");
   unsigned int cmd=1;
   unsigned long arg =4;
 fd = open("/dev/sil9024", O_RDWR);
 if (fd < 0)
  {
   printf("open sil9024 fail\n");
  }
 else
 {
  printf("open sil9024 ok\n");
 }
   int retu = ioctl(fd,cmd,arg );
   if (retu)
 {
     printf("1 set sil9024 video mode fail  %d\n",retu);
 }
 close(fd);
 printf("\n\n");