lint/kconfig_lint: Make sure all symbols have a type defined

Show an error if a symbol does not have a defined type.

This caused a problem of an undefined symbol in check_defaults, so
we just skip those symbols there as we can't verify the default pattern
without knowing the type.

Change-Id: I28711a77962e16f6fc89789400363edd0fdd0931
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/17345
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@googlemail.com>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

util/lint/kconfig_lint

@@ -85,6 +85,7 @@ sub Main {
 
     load_config($config_file) if ($config_file);
 
+    check_type();
     check_defaults();
     check_referenced_symbols();
 
@@ -272,6 +273,31 @@ sub check_for_def {
     }
 }
 
+#-------------------------------------------------------------------------------
+# check_type - Make sure that all symbols have a type defined.
+#
+# Conflicting types are found when parsing the Kconfig tree.
+#-------------------------------------------------------------------------------
+sub check_type {
+
+    # loop through each defined symbol
+    foreach my $sym ( sort ( keys %symbols ) ) {
+
+        # Make sure there's a type set for the symbol
+        if (!defined $symbols{$sym}{type}) {
+
+            #loop through each instance of that symbol
+            for ( my $sym_num = 0 ; $sym_num <= $symbols{$sym}{count} ; $sym_num++ ) {
+
+                my $filename = $symbols{$sym}{$sym_num}{file};
+                my $line_no  = $symbols{$sym}{$sym_num}{line_no};
+
+                show_error("No type defined for symbol $sym defined at $filename:$line_no.");
+            }
+        }
+    }
+}
+
 #-------------------------------------------------------------------------------
 # check_is_enabled - The IS_ENABLED() macro is only valid for symbols of type
 # bool. It would probably work on type hex or int if the value was 0 or 1, but
@@ -333,6 +359,9 @@ sub check_defaults {
                 my $filename = $symbols{$sym}{$sym_num}{file};
                 my $line_no  = $symbols{$sym}{$sym_num}{default}{$def_num}{default_line_no};
 
+                # Make sure there's a type set for the symbol
+                next if (!defined $symbols{$sym}{type});
+
                 # skip good defaults
                 if (! ((($symbols{$sym}{type} eq "hex") && ($symbols{$sym}{$sym_num}{default}{$def_num}{default} =~ /^0x/)) ||
                     (($symbols{$sym}{type} eq "int") && ($symbols{$sym}{$sym_num}{default}{$def_num}{default} =~ /^[-0-9]+$/)) ||

util/lint/kconfig_lint_README

@@ -89,6 +89,7 @@ Errors in Kconfig that are also caught by Kconfig itself:
   int in another location.
 - Type keywords (bool, int, hex, string) used outside of a config block.
 - Using a 'prompt' keyword not inside a config or choice block.
+- Symbols with no defined type.
 
 Errors in coreboot source files:
 - The IS_ENABLED macro is only valid for bool symbols.