scripts: extract_dts_includes.py: generate 'compatible' CONFIG flags

Generate CONFIG_DT_COMPAT flags using available nodes
'compatible' property.
Store them in a bogus node_address key of defs dict so
duplicates could be removed.

Signed-off-by: Bobby Noelte <b0661n0e17e@gmail.com>
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>

scripts/dts/extract/compatible.py

@@ -0,0 +1,50 @@
+#
+# Copyright (c) 2018 Bobby Noelte
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+from extract.globals import *
+from extract.directive import DTDirective
+
+##
+# @brief Manage compatible directives.
+#
+# Handles:
+# - compatible
+#
+class DTCompatible(DTDirective):
+
+    def __init__(self):
+        pass
+
+    ##
+    # @brief Extract compatible
+    #
+    # @param node_address Address of node owning the
+    #                     compatible definition.
+    # @param yaml YAML definition for the owning node.
+    # @param prop compatible property name
+    # @param names (unused)
+    # @param def_label Define label string of node owning the
+    #                  compatible definition.
+    #
+    def extract(self, node_address, yaml, prop, names, def_label):
+
+        # compatible definition
+        compatible = reduced[node_address]['props'][prop]
+        if not isinstance(compatible, list):
+            compatible = [compatible, ]
+
+        for i, comp in enumerate(compatible):
+            # Generate #define's
+            compat_label = convert_string_to_label(str(comp))
+            compat_defs = 'CONFIG_DT_COMPAT_' + compat_label
+            load_defs = {
+                compat_defs: "",
+            }
+            insert_defs(node_address, load_defs, {})
+
+##
+# @brief Management information for compatible.
+compatible = DTCompatible()

scripts/dts/extract/globals.py

@@ -121,6 +121,11 @@ def get_phandles(root, name, handles):
 
 
 def insert_defs(node_address, new_defs, new_aliases):
+
+    for key in new_defs.keys():
+        if key.startswith('CONFIG_DT_COMPAT_'):
+            node_address = 'Compatibles'
+
     if node_address in defs:
         if 'aliases' in defs[node_address]:
             defs[node_address]['aliases'].update(new_aliases)

scripts/dts/extract_dts_includes.py

@@ -21,6 +21,7 @@ from devicetree import parse_file
 from extract.globals import *
 
 from extract.clocks import clocks
+from extract.compatible import compatible
 from extract.interrupts import interrupts
 from extract.reg import reg
 from extract.flash import flash
@@ -443,6 +444,8 @@ def extract_property(node_compat, yaml, node_address, prop, prop_val, names,
             reg.extract(node_address, yaml, prop, names, def_label)
     elif prop == 'interrupts' or prop == 'interrupts-extended':
         interrupts.extract(node_address, yaml, prop, names, def_label)
+    elif prop == 'compatible':
+        compatible.extract(node_address, yaml, prop, names, def_label)
     elif 'pinctrl-' in prop:
         pinctrl.extract(node_address, yaml, prop, names, def_label)
     elif 'clocks' in prop: