boards: set CONFIG_BOARD default based on devicetree

Kconfig.zephyr

@@ -19,7 +19,7 @@ osource "$(KCONFIG_BINARY_DIR)/Kconfig.shield.defconfig"
 # This loads Zephyr base shield defconfigs
 source "boards/shields/*/Kconfig.defconfig"
 
-source "$(BOARD_DIR)/Kconfig.defconfig"
+osource "$(BOARD_DIR)/Kconfig.defconfig"
 
 # This loads custom SoC root defconfigs
 osource "$(KCONFIG_BINARY_DIR)/Kconfig.soc.defconfig"

boards/Kconfig

@@ -2,6 +2,7 @@
 
 config BOARD
 	string
+	default	"$(dt_node_str_prop,/,model)"
 	help
 	  This option holds the name of the board and is used to locate the files
 	  related to the board in the source tree (under boards/).

doc/build/kconfig/preprocessor-functions.rst

@@ -55,6 +55,7 @@ while the ``*_hex`` version returns a hexadecimal value starting with ``0x``.
    $(dt_nodelabel_has_prop,<node label>,<prop>)
    $(dt_node_int_prop_int,<node path>,<prop>[,<unit>])
    $(dt_node_int_prop_hex,<node path>,<prop>[,<unit>])
+   $(dt_node_str_prop,<node path>,<prop>)
    $(dt_node_str_prop_equals,<node path>,<prop>,<value>)
    $(dt_nodelabel_has_compat,<node label>,<compatible string>)
    $(dt_nodelabel_path,<node label>)

dts/bindings/base/base.yaml

@@ -59,6 +59,11 @@ properties:
         deprecated: true
         description: Human readable string describing the device (used as device_get_binding() argument)
 
+    model:
+        type: string
+        required: false
+        description: specifies the manufacturer’s model number of the device
+
     clocks:
         type: phandle-array
         required: false

include/zephyr/devicetree.h

@@ -545,7 +545,7 @@
  * A property's type is usually defined by its binding. In some
  * special cases, it has an assumed type defined by the devicetree
  * specification even when no binding is available: "compatible" has
- * type string-array, "status" and "label" have type string, and
+ * type string-array, "status", "model", and "label" have type string, and
  * "interrupt-controller" has type boolean.
  *
  * For other properties or properties with unknown type due to a

scripts/dts/python-devicetree/src/devicetree/edtlib.py

@@ -2964,7 +2964,7 @@ class _BindingLoader(Loader):
 #
 # Zephyr: do not change the _DEFAULT_PROP_TYPES keys without
 # updating the documentation for the DT_PROP() macro in
-# include/devicetree.h.
+# include/zephyr/devicetree.h.
 #
 
 _DEFAULT_PROP_TYPES = {
@@ -2973,6 +2973,7 @@ class _BindingLoader(Loader):
     "reg": "array",
     "reg-names": "string-array",
     "label": "string",
+    "model": "string",
     "interrupts": "array",
     "interrupts-extended": "compound",
     "interrupt-names": "string-array",

scripts/kconfig/kconfigfunctions.py

@@ -475,6 +475,31 @@ def dt_node_int_prop(kconf, name, path, prop, unit=None):
         return hex(_node_int_prop(node, prop, unit))
 
 
+def dt_node_str_prop(kconf, _, path, prop):
+    """
+    This function takes a 'path' and property name ('prop') looks for an EDT
+    node at that path. If it finds an EDT node, it will look to see if that
+    node has a property 'prop' of type string and will return the value of
+    the property 'prop' as a string, if not it will return "".
+    """
+
+    if doc_mode or edt is None:
+        return ""
+
+    try:
+        node = edt.get_node(path)
+    except edtlib.EDTError:
+        return ""
+
+    if prop not in node.props:
+        return ""
+
+    if node.props[prop].type != "string":
+        return ""
+
+    return node.props[prop].val
+
+
 def dt_node_array_prop(kconf, name, path, prop, index, unit=None):
     """
     This function takes a 'path', property name ('prop') and index ('index')
@@ -667,6 +692,7 @@ def shields_list_contains(kconf, _, shield):
         "dt_node_int_prop_hex": (dt_node_int_prop, 2, 3),
         "dt_node_array_prop_int": (dt_node_array_prop, 3, 4),
         "dt_node_array_prop_hex": (dt_node_array_prop, 3, 4),
+        "dt_node_str_prop": (dt_node_str_prop, 2, 2),
         "dt_node_str_prop_equals": (dt_node_str_prop_equals, 3, 3),
         "dt_nodelabel_has_compat": (dt_nodelabel_has_compat, 2, 2),
         "dt_nodelabel_path": (dt_nodelabel_path, 1, 1),