反编译andriod dtb.img 为dts

平台：Android 7.1
使用到的工具：dtc
工具在kernel 路径下 scripts/dtc
编译完成后可有执行文件生成 dtc

Usage: dtc [options] <input file>

Options: -[qI:O:o:V:d:R:S:p:a:fb:i:H:sW:E:@Ahv]
  -q, --quiet                
    Quiet: -q suppress warnings, -qq errors, -qqq all
  -I, --in-format <arg>      
    Input formats are:
        dts - device tree source text
        dtb - device tree blob
        fs  - /proc/device-tree style directory
  -o, --out <arg>            
    Output file
  -O, --out-format <arg>     
    Output formats are:
        dts - device tree source text
        dtb - device tree blob
        asm - assembler source
  -V, --out-version <arg>    
    Blob version to produce, defaults to 17 (for dtb and asm output)
  -d, --out-dependency <arg> 
    Output dependency file
  -R, --reserve <arg>        
    Make space for <number> reserve map entries (for dtb and asm output)
  -S, --space <arg>          
    Make the blob at least <bytes> long (extra space)
  -p, --pad <arg>            
    Add padding to the blob of <bytes> long (extra space)
  -a, --align <arg>          
    Make the blob align to the <bytes> (extra space)
  -b, --boot-cpu <arg>       
    Set the physical boot cpu
  -f, --force                
    Try to produce output even if the input tree has errors
  -i, --include <arg>        
    Add a path to search for include files
  -s, --sort                 
    Sort nodes and properties before outputting (useful for comparing trees)
  -H, --phandle <arg>        
    Valid phandle formats are:
        legacy - "linux,phandle" properties only
        epapr  - "phandle" properties only
        both   - Both "linux,phandle" and "phandle" properties
  -W, --warning <arg>        
    Enable/disable warnings (prefix with "no-")
  -E, --error <arg>          
    Enable/disable errors (prefix with "no-")
  -@, --symbols              
    Enable generation of symbols
  -A, --auto-alias           
    Enable auto-alias of labels
  -h, --help                 
    Print this help and exit
  -v, --version              
    Print version and exit

Demo:

dtc -I dtb -O dts dtb.img -o demo.dts