linux-kernel - [PATCH] dt: dt-extract-compatibles: Extract compatibles from function parameters

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Message-ID: <20240903200753.2097911-1-robh@kernel.org>
Date: Tue,  3 Sep 2024 15:07:52 -0500
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Saravana Kannan <saravanak@...gle.com>
Cc: Nícolas F . R . A . Prado <nfraprado@...labora.com>,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] dt: dt-extract-compatibles: Extract compatibles from function parameters

Various DT and fwnode functions take a compatible string as a parameter.
These are often used in cases which don't have a driver, so they've been
missed.

The additional checks add about 400 more undocumented compatible
strings.

Cc: Nícolas F. R. A. Prado <nfraprado@...labora.com>
Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
---
 scripts/dtc/dt-extract-compatibles | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/scripts/dtc/dt-extract-compatibles b/scripts/dtc/dt-extract-compatibles
index 5ffb2364409b..13ea66d49e6c 100755
--- a/scripts/dtc/dt-extract-compatibles
+++ b/scripts/dtc/dt-extract-compatibles
@@ -46,6 +46,15 @@ def parse_of_match_table(data):
 	return match_table_list
 
 
+def parse_of_functions(data, func_name):
+	""" Find all (device|machine)_is_compatible() arguments """
+	match_table_list = []
+	for m in re.finditer(rf'{func_name}\(([a-zA-Z0-9_>\(\)"\-]+,\s)*"([a-zA-Z0-9_,-]+)"\)', data):
+		match_table_list.append(m[2])
+
+	return match_table_list
+
+
 def parse_compatibles(file, compat_ignore_list):
 	with open(file, 'r', encoding='utf-8') as f:
 		data = f.read().replace('\n', '')
@@ -60,6 +69,10 @@ def parse_compatibles(file, compat_ignore_list):
 	else:
 		compat_list = parse_of_declare_macros(data)
 		compat_list += parse_of_device_id(data)
+		compat_list += parse_of_functions(data, "_is_compatible")
+		compat_list += parse_of_functions(data, "of_find_compatible_node")
+		compat_list += parse_of_functions(data, "for_each_compatible_node")
+		compat_list += parse_of_functions(data, "of_get_compatible_child")
 
 	return compat_list
 
-- 
2.45.2