RK3568平台 sys虚拟文件系统 添加节点 Ch423 driver (1)

    root@ubuntu:/sys/block# ls
    loop0  loop3  loop6  ram1   ram12  ram15  ram4  ram7  sda
    loop1  loop4  loop7  ram10  ram13  ram2   ram5  ram8  sr0
    loop2  loop5  ram0   ram11  ram14  ram3   ram6  ram9  sr1
    root@ubuntu:/sys/block# cd sr0
    root@ubuntu:/sys/block/sr0# ls
    alignment_offset  discard_alignment  holders   removable  subsystem
    bdi               events             inflight  ro         trace
    capability        events_async       power     size       uevent
    dev               events_poll_msecs  queue     slaves
    device            ext_range          r