scripts/dtc/dt-extract-compatibles

   1 #!/usr/bin/env python3
   2 # SPDX-License-Identifier: GPL-2.0-only
   3
   4 import os
   5 import glob
   6 import re
   7 import argparse
   8
   9
  10 def parse_of_declare_macros(data, include_driver_macros=True):
  11         """ Find all compatible strings in OF_DECLARE() style macros """
  12         compat_list = []
  13         # CPU_METHOD_OF_DECLARE does not have a compatible string
  14         if include_driver_macros:
  15                 re_macros = r'(?<!CPU_METHOD_)(IRQCHIP|OF)_(DECLARE|MATCH)(_DRIVER)?\(.*?\)'
  16         else:
  17                 re_macros = r'(?<!CPU_METHOD_)(IRQCHIP|OF)_(DECLARE|MATCH)\(.*?\)'
  18         for m in re.finditer(re_macros, data):
  19                 try:
  20                         compat = re.search(r'"(.*?)"', m[0])[1]
  21                 except:
  22                         # Fails on compatible strings in #define, so just skip
  23                         continue
  24                 compat_list += [compat]
  25
  26         return compat_list
  27
  28
  29 def parse_of_device_id(data, match_table_list=None):
  30         """ Find all compatible strings in of_device_id structs """
  31         compat_list = []
  32         for m in re.finditer(r'of_device_id(\s+\S+)?\s+(\S+)\[\](\s+\S+)?\s*=\s*({.*?);', data):
  33                 if match_table_list is not None and m[2] not in match_table_list:
  34                         continue
  35                 compat_list += re.findall(r'\.compatible\s+=\s+"(\S+)"', m[4])
  36
  37         return compat_list
  38
  39
  40 def parse_of_match_table(data):
  41         """ Find all driver's of_match_table """
  42         match_table_list = []
  43         for m in re.finditer(r'\.of_match_table\s+=\s+(of_match_ptr\()?([a-zA-Z0-9_-]+)', data):
  44                 match_table_list.append(m[2])
  45
  46         return match_table_list
  47
  48
  49 def parse_compatibles(file, compat_ignore_list):
  50         with open(file, 'r', encoding='utf-8') as f:
  51                 data = f.read().replace('\n', '')
  52
  53         if compat_ignore_list is not None:
  54                 # For a compatible in the DT to be matched to a driver it needs to show
  55                 # up in a driver's of_match_table
  56                 match_table_list = parse_of_match_table(data)
  57                 compat_list = parse_of_device_id(data, match_table_list)
  58
  59                 compat_list = [compat for compat in compat_list if compat not in compat_ignore_list]
  60         else:
  61                 compat_list = parse_of_declare_macros(data)
  62                 compat_list += parse_of_device_id(data)
  63
  64         return compat_list
  65
  66 def parse_compatibles_to_ignore(file):
  67         with open(file, 'r', encoding='utf-8') as f:
  68                 data = f.read().replace('\n', '')
  69
  70         # Compatibles that show up in OF_DECLARE macros can't be expected to
  71         # match a driver, except for the _DRIVER ones.
  72         return parse_of_declare_macros(data, include_driver_macros=False)
  73
  74
  75 def print_compat(filename, compatibles):
  76         if not compatibles:
  77                 return
  78         if show_filename:
  79                 compat_str = ' '.join(compatibles)
  80                 print(filename + ": compatible(s): " + compat_str)
  81         else:
  82                 print(*compatibles, sep='\n')
  83
  84 def files_to_parse(path_args):
  85         for f in path_args:
  86                 if os.path.isdir(f):
  87                         for filename in glob.iglob(f + "/**/*.c", recursive=True):
  88                                 yield filename
  89                 else:
  90                         yield f
  91
  92 show_filename = False
  93
  94 if __name__ == "__main__":
  95         ap = argparse.ArgumentParser()
  96         ap.add_argument("cfile", type=str, nargs='*', help="C source files or directories to parse")
  97         ap.add_argument('-H', '--with-filename', help="Print filename with compatibles", action="store_true")
  98         ap.add_argument('-d', '--driver-match', help="Only print compatibles that should match to a driver", action="store_true")
  99         args = ap.parse_args()
 100
 101         show_filename = args.with_filename
 102         compat_ignore_list = None
 103
 104         if args.driver_match:
 105                 compat_ignore_list = []
 106                 for f in files_to_parse(args.cfile):
 107                         compat_ignore_list.extend(parse_compatibles_to_ignore(f))
 108
 109         for f in files_to_parse(args.cfile):
 110                 compat_list = parse_compatibles(f, compat_ignore_list)
 111                 print_compat(f, compat_list)