sanitycheck: Add functions to query device tree for filters

Add the following functions to allow filtering based on device tree

dt_compat_enabled(compat) - Returns true if a device tree node
compatible matches 'compat' and the node is enabled.

dt_alias_exists(alias) - Returns true if a device tree node exists with
'alias' and the node is enabled.

dt_compat_enabled_with_alias - Returns true if a device tree node
compatible matches 'compat' and the node has 'alias' and the node is
enabled.

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>

scripts/sanity_chk/expr_parser.py

@@ -134,6 +134,20 @@ def p_expr_single(p):
     """expr : SYMBOL"""
     p[0] = ("exists", p[1])
 
+def p_func(p):
+    """expr : SYMBOL OPAREN arg_intr CPAREN"""
+    p[0] = [p[1]]
+    p[0].append(p[3])
+
+def p_arg_intr_single(p):
+    """arg_intr : const"""
+    p[0] = [p[1]]
+
+def p_arg_intr_mult(p):
+    """arg_intr : arg_intr COMMA const"""
+    p[0] = copy.copy(p[1])
+    p[0].append(p[3])
+
 def p_list(p):
     """list : OBRACKET list_intr CBRACKET"""
     p[0] = p[2]
@@ -182,13 +196,13 @@ def ast_sym_int(ast, env):
             return int(v, 10)
     return 0
 
-def ast_expr(ast, env):
+def ast_expr(ast, env, edt):
     if ast[0] == "not":
-        return not ast_expr(ast[1], env)
+        return not ast_expr(ast[1], env, edt)
     elif ast[0] == "or":
-        return ast_expr(ast[1], env) or ast_expr(ast[2], env)
+        return ast_expr(ast[1], env, edt) or ast_expr(ast[2], env, edt)
     elif ast[0] == "and":
-        return ast_expr(ast[1], env) and ast_expr(ast[2], env)
+        return ast_expr(ast[1], env, edt) and ast_expr(ast[2], env, edt)
     elif ast[0] == "==":
         return ast_sym(ast[1], env) == ast[2]
     elif ast[0] == "!=":
@@ -207,10 +221,29 @@ def ast_expr(ast, env):
         return bool(ast_sym(ast[1], env))
     elif ast[0] == ":":
         return bool(re.match(ast[2], ast_sym(ast[1], env)))
+    elif ast[0] == "dt_compat_enabled":
+        compat = ast[1][0]
+        for node in edt.nodes:
+            if compat in node.compats and node.enabled:
+                return True
+        return False
+    elif ast[0] == "dt_alias_exists":
+        alias = ast[1][0]
+        for node in edt.nodes:
+            if alias in node.aliases and node.enabled:
+                return True
+        return False
+    elif ast[0] == "dt_compat_enabled_with_alias":
+        compat = ast[1][0]
+        alias = ast[1][1]
+        for node in edt.nodes:
+            if node.enabled and alias in node.aliases and node.matching_compat == compat:
+                return True
+        return False
 
 mutex = threading.Lock()
 
-def parse(expr_text, env):
+def parse(expr_text, env, edt):
     """Given a text representation of an expression in our language,
     use the provided environment to determine whether the expression
     is true or false"""
@@ -222,7 +255,7 @@ def parse(expr_text, env):
     finally:
         mutex.release()
 
-    return ast_expr(ast, env)
+    return ast_expr(ast, env, edt)
 
 # Just some test code
 if __name__ == "__main__":
@@ -244,4 +277,4 @@ def parse(expr_text, env):
         parser = yacc.yacc()
         print(parser.parse(line))
 
-        print(parse(line, local_env))
+        print(parse(line, local_env, None))

scripts/sanitycheck

@@ -199,6 +199,13 @@ from itertools import islice
 from pathlib import Path
 from distutils.spawn import find_executable
 
+ZEPHYR_BASE = os.getenv("ZEPHYR_BASE")
+if not ZEPHYR_BASE:
+    sys.exit("$ZEPHYR_BASE environment variable undefined")
+
+sys.path.insert(0, os.path.join(ZEPHYR_BASE, "scripts", "dts"))
+import edtlib
+
 import logging
 
 
@@ -209,11 +216,6 @@ report_lock = threading.Lock()
 log_format = "%(levelname)s %(name)s::%(module)s.%(funcName)s():%(lineno)d: %(message)s"
 logging.basicConfig(format=log_format, level=30)
 
-ZEPHYR_BASE = os.environ.get("ZEPHYR_BASE")
-if not ZEPHYR_BASE:
-    sys.stderr.write("$ZEPHYR_BASE environment variable undefined.\n")
-    exit(1)
-
 # Use this for internal comparisons; that's what canonicalization is
 # for. Don't use it when invoking other components of the build system
 # to avoid confusing and hard to trace inconsistencies in error messages
@@ -1902,7 +1904,10 @@ class FilterBuilder(CMake):
 
         if self.testcase and self.testcase.tc_filter:
             try:
-                res = expr_parser.parse(self.testcase.tc_filter, filter_data)
+                dts_path = os.path.join(self.build_dir, "zephyr", self.platform.name + ".dts.pre.tmp")
+                edt = edtlib.EDT(dts_path, [os.path.join(ZEPHYR_BASE, "dts", "bindings")])
+                res = expr_parser.parse(self.testcase.tc_filter, filter_data, edt)
+
             except (ValueError, SyntaxError) as se:
                 sys.stderr.write(
                     "Failed processing %s\n" % self.testcase.yamlfile)