Add a script to extract all the supported acpi device ids
from kernel sources.
The list of IDs returned by the script can be used as a
reference to determine if a device declared in the ACPI namespace
with certain _HID/_CID is supported by the kernel or not.
Signed-off-by: Laura Nao <laura.nao@xxxxxxxxxxxxx>
---
MAINTAINERS | 1 +
scripts/acpi/acpi-extract-ids | 60 +++++++++++++++++++++++++++++++++++
2 files changed, 61 insertions(+)
create mode 100755 scripts/acpi/acpi-extract-ids
diff --git a/MAINTAINERS b/MAINTAINERS
index 27751573e314..7540316d82f5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -294,6 +294,7 @@ F: drivers/pnp/pnpacpi/
F: include/acpi/
F: include/linux/acpi.h
F: include/linux/fwnode.h
+F: scripts/acpi/acpi-extract-ids
F: tools/power/acpi/
ACPI APEI
diff --git a/scripts/acpi/acpi-extract-ids b/scripts/acpi/acpi-extract-ids
new file mode 100755
index 000000000000..12c8e09281dd
--- /dev/null
+++ b/scripts/acpi/acpi-extract-ids
@@ -0,0 +1,60 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Heavily inspired by the scripts/dtc/dt-extract-compatibles script,
+# adapted for the ACPI use case.
+#
+
+import os
+import glob
+import re
+import argparse
+
+
+def parse_acpi_device_ids(file):
+ """ Find all device ID strings in acpi_device_id struct """
+ id_list = []
+
+ with open(file, 'r', encoding='utf-8') as f:
+ data = f.read().replace('\n', '')
+
+ for m in re.finditer(r'acpi_device_id(\s+\S+)?\s+(\S+)\[\](\s+\S+)?\s*=\s*({.*?);', data):
+ id_list += re.findall(r'\"(\S+)\"', m[4])
+
+ return id_list
+
+
+def print_acpi_device_ids(filename, id_list):
+ if not id_list:
+ return
+ if show_filename:
+ compat_str = ' '.join(id_list)
+ print(filename + ": ID(s): " + compat_str)
+ else:
+ print(*id_list, sep='\n')
+
+
+def files_to_parse(path_args):
+ for f in path_args:
+ if os.path.isdir(f):
+ for filename in glob.iglob(f + "/**/*.c", recursive=True):
+ yield filename
+ else:
+ yield f
+
+
+show_filename = False
+
+if __name__ == "__main__":
+ ap = argparse.ArgumentParser()
+ ap.add_argument("cfile", type=str, nargs='*',
+ help="C source files or directories to parse")
+ ap.add_argument('-H', '--with-filename',
+ help="Print filename with device ids", action="store_true")
+ args = ap.parse_args()
+
+ show_filename = args.with_filename
+
+ for f in files_to_parse(args.cfile):
+ id_list = parse_acpi_device_ids(f)
+ print_acpi_device_ids(f, id_list)
--
2.30.2
