Devicetree DTS and YAML format improvements (#492)

* **DevicetreeCompiler**
  * Binding properties now support default values.
  * Compiler returns meaningful exit codes and reports errors more clearly.
  * Stronger validation of device configurations with unified error handling.
  * Added integration tests and a dedicated Devicetree test workflow.

* **Changes**
  * Platform binding schemas updated: some fields made required, others gained explicit defaults.
  * Many device-tree files simplified by removing unused/placeholder pin and transfer-size entries.

* **Documentation**
  * Removed several outdated TODO items.

.github/workflows/tests.yml

@@ -6,7 +6,7 @@ on:
   pull_request:
     types: [ opened, synchronize, reopened ]
 jobs:
-  run:
+  TactilityTests:
     runs-on: ubuntu-latest
     steps:
       - name: "Checkout repo"
@@ -27,3 +27,17 @@ jobs:
         run: build/Tests/Tactility/TactilityTests
       - name: "Run TactilityKernel Tests"
         run: build/Tests/TactilityKernel/TactilityKernelTests
+  DevicetreeTests:
+    runs-on: ubuntu-latest
+    steps:
+      - name: "Checkout repo"
+        uses: actions/checkout@v2
+        with:
+          submodules: recursive
+      - name: "Install Python Dependencies"
+        shell: bash
+        run: pip install lark==1.3.1 pyyaml==6.0.3
+      - name: "Run Devicetree Tests"
+        shell: bash
+        working-directory: Buildscripts/DevicetreeCompiler/tests
+        run: python test_integration.py

Buildscripts/DevicetreeCompiler/compile.py

@@ -24,5 +24,6 @@ if __name__ == "__main__":
     is_verbose = "--verbose" in sys.argv
     devicetree_yaml_config = args[0]
     output_path = args[1]
-    main(devicetree_yaml_config, output_path, is_verbose)
+    result = main(devicetree_yaml_config, output_path, is_verbose)
+    sys.exit(result)
 

Buildscripts/DevicetreeCompiler/source/binding_files.py

@@ -1,4 +1,5 @@
 import os
+from .exception import DevicetreeException
 
 def find_bindings(directory_path: str) -> list[str]:
     yaml_files = []
@@ -14,6 +15,6 @@ def find_all_bindings(directory_paths: list[str]) -> list[str]:
     for directory_path in directory_paths:
         new_paths = find_bindings(directory_path)
         if len(new_paths) == 0:
-            raise Exception(f"No bindings found in {directory_path}")
+            raise DevicetreeException(f"No bindings found in {directory_path}")
         yaml_files += new_paths
     return yaml_files

Buildscripts/DevicetreeCompiler/source/binding_parser.py

@@ -44,6 +44,7 @@ def parse_binding(file_path: str, binding_dirs: list[str]) -> Binding:
             type=details.get('type', 'unknown'),
             required=details.get('required', False),
             description=details.get('description', '').strip(),
+            default=details.get('default', None),
         )
         properties_dict[name] = prop
     filename = os.path.basename(file_path)

Buildscripts/DevicetreeCompiler/source/exception.py

@@ -0,0 +1,2 @@
+class DevicetreeException(Exception):
+    pass

Buildscripts/DevicetreeCompiler/source/generator.py

@@ -1,7 +1,7 @@
 import os.path
 from textwrap import dedent
-
 from source.models import *
+from .exception import DevicetreeException
 
 def write_include(file, include: IncludeC, verbose: bool):
     if verbose:
@@ -26,9 +26,9 @@ def get_device_node_name_safe(device: Device):
 def get_device_type_name(device: Device, bindings: list[Binding]):
     device_binding = find_device_binding(device, bindings)
     if device_binding is None:
-        raise Exception(f"Binding not found for {device.node_name}")
+        raise DevicetreeException(f"Binding not found for {device.node_name}")
     if device_binding.compatible is None:
-        raise Exception(f"Couldn't find compatible binding for {device.node_name}")
+        raise DevicetreeException(f"Couldn't find compatible binding for {device.node_name}")
     compatible_safe = device_binding.compatible.split(",")[-1]
     return compatible_safe.replace("-", "_")
 
@@ -41,7 +41,7 @@ def find_device_property(device: Device, name: str) -> DeviceProperty:
 def find_device_binding(device: Device, bindings: list[Binding]) -> Binding:
     compatible_property = find_device_property(device, "compatible")
     if compatible_property is None:
-        raise Exception(f"property 'compatible' not found in device {device.node_name}")
+        raise DevicetreeException(f"property 'compatible' not found in device {device.node_name}")
     for binding in bindings:
         if binding.compatible == compatible_property.value:
             return binding
@@ -57,44 +57,69 @@ def find_phandle(devices: list[Device], phandle: str):
     for device in devices:
         if device.node_name == phandle or device.node_alias == phandle:
             return f"&{get_device_node_name_safe(device)}"
-    raise Exception(f"phandle '{phandle}' not found in device tree")
+    raise DevicetreeException(f"phandle '{phandle}' not found in device tree")
 
 def property_to_string(property: DeviceProperty, devices: list[Device]) -> str:
     type = property.type
-    if type == "value":
+    if type == "value" or type == "int":
         return property.value
-    elif type == "boolean":
+    elif type == "boolean" or type == "bool":
         return "true"
     elif type == "text":
         return f"\"{property.value}\""
     elif type == "values":
-        return "{ " + ",".join(property.value) + " }"
+        value_list = list()
+        for item in property.value:
+            if isinstance(item, PropertyValue):
+                value_list.append(property_to_string(DeviceProperty(name="", type=item.type, value=item.value), devices))
+            else:
+                value_list.append(str(item))
+        return "{ " + ",".join(value_list) + " }"
     elif type == "phandle":
         return find_phandle(devices, property.value)
     else:
-        raise Exception(f"property_to_string() has an unsupported type: {type}")
+        raise DevicetreeException(f"property_to_string() has an unsupported type: {type}")
 
 def resolve_parameters_from_bindings(device: Device, bindings: list[Binding], devices: list[Device]) -> list:
     compatible_property = find_device_property(device, "compatible")
     if compatible_property is None:
-        raise Exception(f"Cannot find 'compatible' property for {device.node_name}")
+        raise DevicetreeException(f"Cannot find 'compatible' property for {device.node_name}")
     device_binding = find_binding(compatible_property.value, bindings)
     if device_binding is None:
-        raise Exception(f"Binding not found for {device.node_name} and compatible '{compatible_property.value}'")
+        raise DevicetreeException(f"Binding not found for {device.node_name} and compatible '{compatible_property.value}'")
     # Filter out system properties
     binding_properties = []
+    binding_property_names = set()
     for property in device_binding.properties:
         if property.name != "compatible":
             binding_properties.append(property)
+            binding_property_names.add(property.name)
+
+    # Check for invalid properties in device
+    for device_property in device.properties:
+        if device_property.name in ["compatible"]:
+            continue
+        if device_property.name not in binding_property_names:
+            raise DevicetreeException(f"Device '{device.node_name}' has invalid property '{device_property.name}'")
+
     # Allocate total expected configuration arguments
     result = [0] * len(binding_properties)
     for index, binding_property in enumerate(binding_properties):
         device_property = find_device_property(device, binding_property.name)
         if device_property is None:
-            if binding_property.required:
+            if binding_property.default is not None:
-                raise Exception(f"device {device.node_name} doesn't have property '{binding_property.name}'")
+                temp_prop = DeviceProperty(
+                    name=binding_property.name,
+                    type=binding_property.type,
+                    value=binding_property.default
+                )
+                result[index] = property_to_string(temp_prop, devices)
+            elif binding_property.required:
+                raise DevicetreeException(f"device {device.node_name} doesn't have property '{binding_property.name}'")
+            elif binding_property.type == "bool":
+                result[index] = "false"
             else:
-                result[index] = '0'
+                raise DevicetreeException(f"Device {device.node_name} doesn't have property '{binding_property.name}' and no default value is set")
         else:
             result[index] = property_to_string(device_property, devices)
     return result
@@ -121,7 +146,7 @@ def write_device_structs(file, device: Device, parent_device: Device, bindings:
     type_name = get_device_type_name(device, bindings)
     compatible_property = find_device_property(device, "compatible")
     if compatible_property is None:
-        raise Exception(f"Cannot find 'compatible' property for {device.node_name}")
+        raise DevicetreeException(f"Cannot find 'compatible' property for {device.node_name}")
     node_name = get_device_node_name_safe(device)
     config_variable_name = f"{node_name}_config"
     if parent_device is not None:
@@ -148,7 +173,7 @@ def write_device_init(file, device: Device, bindings: list[Binding], verbose: bo
     # Assemble some pre-requisites
     compatible_property = find_device_property(device, "compatible")
     if compatible_property is None:
-        raise Exception(f"Cannot find 'compatible' property for {device.node_name}")
+        raise DevicetreeException(f"Cannot find 'compatible' property for {device.node_name}")
     # Type & instance names
     node_name = get_device_node_name_safe(device)
     device_variable = node_name

Buildscripts/DevicetreeCompiler/source/main.py

@@ -9,38 +9,45 @@ from source.generator import *
 from source.binding_files import find_all_bindings
 from source.binding_parser import parse_binding
 from source.config import *
+from source.exception import DevicetreeException
 
-def main(config_path: str, output_path: str, verbose: bool):
+def main(config_path: str, output_path: str, verbose: bool) -> int:
     print(f"Generating devicetree code\n  config: {config_path}\n  output: {output_path}")
     if not os.path.isdir(config_path):
-        raise Exception(f"Directory not found: {config_path}")
+        print(f"Directory not found: {config_path}")
+        return 1
 
     config = parse_config(config_path, os.getcwd())
     if verbose:
         pprint(config)
 
-    project_dir = os.path.dirname(os.path.realpath(__file__))
+    try:
-    grammar_path = os.path.join(project_dir, "grammar.lark")
+        project_dir = os.path.dirname(os.path.realpath(__file__))
-    lark_data = read_file(grammar_path)
+        grammar_path = os.path.join(project_dir, "grammar.lark")
-    dts_data = read_file(config.dts)
+        lark_data = read_file(grammar_path)
-    lark = Lark(lark_data)
+        dts_data = read_file(config.dts)
-    parsed = lark.parse(dts_data)
+        lark = Lark(lark_data)
-    if verbose:
+        parsed = lark.parse(dts_data)
-        print(parsed.pretty())
+        if verbose:
-    transformed = DtsTransformer().transform(parsed)
+            print(parsed.pretty())
-    if verbose:
+        transformed = DtsTransformer().transform(parsed)
-        pprint(transformed)
+        if verbose:
-    binding_files = find_all_bindings(config.bindings)
+            pprint(transformed)
-    if verbose:
+        binding_files = find_all_bindings(config.bindings)
-        print(f"Bindings found:")
+        if verbose:
+            print("Bindings found:")
+            for binding_file in binding_files:
+                print(f"  {binding_file}")
+        if verbose:
+            print("Parsing bindings")
+        bindings = []
         for binding_file in binding_files:
-            print(f"  {binding_file}")
+            bindings.append(parse_binding(binding_file, config.bindings))
-    if verbose:
+        if verbose:
-        print(f"Parsing bindings")
+            for binding in bindings:
-    bindings = []
+                pprint(binding)
-    for binding_file in binding_files:
+        generate(output_path, transformed, bindings, verbose)
-        bindings.append(parse_binding(binding_file, config.bindings))
+        return 0
-    if verbose:
+    except DevicetreeException as caught:
-        for binding in bindings:
+        print("\033[31mError: ", caught, "\033[0m")
-            pprint(binding)
+        return 1
-    generate(output_path, transformed, bindings, verbose)

Buildscripts/DevicetreeCompiler/source/models.py

@@ -36,6 +36,7 @@ class BindingProperty:
     type: str
     required: bool
     description: str
+    default: object = None
 
 @dataclass
 class Binding:

Buildscripts/DevicetreeCompiler/source/transformer.py

@@ -4,6 +4,7 @@ from lark import Transformer
 from lark import Token
 from source.models import *
 from dataclasses import dataclass
+from .exception import DevicetreeException
 
 def flatten_token_array(tokens: List[Token], name: str):
     result_list = list()
@@ -23,7 +24,7 @@ class DtsTransformer(Transformer):
     def dts_version(self, tokens: List[Token]):
         version = tokens[0].value
         if version != "dts-v1":
-            raise Exception(f"Unsupported DTS version: {version}")
+            raise DevicetreeException(f"Unsupported DTS version: {version}")
         return DtsVersion(version)
     def device(self, tokens: list):
         node_name = None
@@ -46,12 +47,12 @@ class DtsTransformer(Transformer):
         if (len(objects) == 1) or (objects[1] is None):
             return DeviceProperty(name, "boolean", True)
         if type(objects[1]) is not PropertyValue:
-            raise Exception(f"Object was not converted to PropertyValue: {objects[1]}")
+            raise DevicetreeException(f"Object was not converted to PropertyValue: {objects[1]}")
         return DeviceProperty(name, objects[1].type, objects[1].value)
     def property_value(self, tokens: List):
         token = tokens[0]
         if type(token) is Token:
-            raise Exception(f"Failed to convert token to PropertyValue: {token}")
+            raise DevicetreeException(f"Failed to convert token to PropertyValue: {token}")
         return token
     def PHANDLE(self, token: Token):
         return PropertyValue(type="phandle", value=token.value[1:])

Buildscripts/DevicetreeCompiler/tests/data/bindings/test,device.yaml

@@ -0,0 +1,14 @@
+description: Test device binding
+compatible: "test,device"
+properties:
+  reg:
+    type: int
+    required: true
+  status:
+    type: string
+  boolean-prop:
+    type: boolean
+  int-prop:
+    type: int
+  string-prop:
+    type: string

Buildscripts/DevicetreeCompiler/tests/data/bindings/test,root.yaml

@@ -0,0 +1,5 @@
+description: Test root binding
+compatible: "test,root"
+properties:
+  model:
+    type: string

Buildscripts/DevicetreeCompiler/tests/data/devicetree.yaml

@@ -0,0 +1,2 @@
+dts: test.dts
+bindings: bindings

Buildscripts/DevicetreeCompiler/tests/data/test.dts

@@ -0,0 +1,17 @@
+/dts-v1/;
+
+#include <test_include.h>
+
+/ {
+    compatible = "test,root";
+    model = "Test Model";
+
+    test_device: test-device@0 {
+        compatible = "test,device";
+        reg = <0>;
+        status = "okay";
+        boolean-prop;
+        int-prop = <42>;
+        string-prop = "hello";
+    };
+};

Buildscripts/DevicetreeCompiler/tests/test_integration.py

@@ -0,0 +1,102 @@
+import os
+import subprocess
+import shutil
+import sys
+import tempfile
+
+# Path to the compile.py script
+# We assume this script is in Buildscripts/DevicetreeCompiler/tests/
+SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
+PROJECT_ROOT = os.path.abspath(os.path.join(SCRIPT_DIR, ".."))
+COMPILE_SCRIPT = os.path.join(PROJECT_ROOT, "compile.py")
+TEST_DATA_DIR = os.path.join(SCRIPT_DIR, "data")
+
+def run_compiler(config_path, output_path):
+    result = subprocess.run(
+        [sys.executable, COMPILE_SCRIPT, config_path, output_path],
+        capture_output=True,
+        text=True,
+        cwd=PROJECT_ROOT,
+        timeout=60
+    )
+    return result
+
+def test_compile_success():
+    print("Running test_compile_success...")
+    with tempfile.TemporaryDirectory() as output_dir:
+        result = run_compiler(TEST_DATA_DIR, output_dir)
+        
+        if result.returncode != 0:
+            print(f"FAILED: Compilation failed: {result.stderr}")
+            return False
+            
+        if not os.path.exists(os.path.join(output_dir, "devicetree.c")):
+            print("FAILED: devicetree.c not generated")
+            return False
+            
+        if not os.path.exists(os.path.join(output_dir, "devicetree.h")):
+            print("FAILED: devicetree.h not generated")
+            return False
+            
+        print("PASSED")
+        return True
+
+def test_compile_invalid_dts():
+    print("Running test_compile_invalid_dts...")
+    with tempfile.TemporaryDirectory() as tmp_dir:
+        bad_data_dir = os.path.join(tmp_dir, "bad_data")
+        os.makedirs(bad_data_dir)
+        output_dir = os.path.join(tmp_dir, "output")
+        os.makedirs(output_dir)
+        
+        with open(os.path.join(bad_data_dir, "devicetree.yaml"), "w") as f:
+            f.write("dts: bad.dts\nbindings: bindings")
+        
+        with open(os.path.join(bad_data_dir, "bad.dts"), "w") as f:
+            f.write("/dts-v1/;\n / { invalid syntax }")
+            
+        os.makedirs(os.path.join(bad_data_dir, "bindings"))
+        
+        result = run_compiler(bad_data_dir, output_dir)
+        
+        if result.returncode == 0:
+            print("FAILED: Compilation should have failed but succeeded")
+            return False
+            
+        print("PASSED")
+        return True
+
+def test_compile_missing_config():
+    print("Running test_compile_missing_config...")
+    with tempfile.TemporaryDirectory() as output_dir:
+        result = run_compiler("/non/existent/path", output_dir)
+        
+        if result.returncode == 0:
+            print("FAILED: Compilation should have failed for non-existent path")
+            return False
+        
+        if "Directory not found" not in result.stdout:
+            print(f"FAILED: Expected 'Directory not found' error message, got: {result.stdout}")
+            return False
+            
+        print("PASSED")
+        return True
+
+if __name__ == "__main__":
+    tests = [
+        test_compile_success,
+        test_compile_invalid_dts,
+        test_compile_missing_config
+    ]
+    
+    failed = 0
+    for test in tests:
+        if not test():
+            failed += 1
+            
+    if failed > 0:
+        print(f"\n{failed} tests failed")
+        sys.exit(1)
+    else:
+        print("\nAll tests passed")
+        sys.exit(0)

Devices/cyd-2432s024c/cyd,2432s024c.dts

@@ -28,9 +28,6 @@
 		pin-mosi = <13>;
 		pin-miso = <GPIO_PIN_NONE>;
 		pin-sclk = <14>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	sdcard_spi: spi1 {
@@ -39,8 +36,5 @@
 		pin-mosi = <23>;
 		pin-miso = <19>;
 		pin-sclk = <18>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 };

Devices/cyd-2432s028r/cyd,2432s028r.dts

@@ -29,9 +29,6 @@
 		pin-mosi = <13>;
 		pin-miso = <12>;
 		pin-sclk = <14>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	sdcard_spi: spi1 {
@@ -40,9 +37,6 @@
 		pin-mosi = <23>;
 		pin-miso = <19>;
 		pin-sclk = <18>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	uart1 {
@@ -50,7 +44,5 @@
 		port = <UART_NUM_1>;
 		pin-tx = <3>;
 		pin-rx = <1>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 };

Devices/cyd-2432s028rv3/cyd,2432s028rv3.dts

@@ -29,9 +29,6 @@
 		pin-mosi = <13>;
 		pin-miso = <12>;
 		pin-sclk = <14>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	sdcard_spi: spi1 {
@@ -40,9 +37,6 @@
 		pin-mosi = <23>;
 		pin-miso = <19>;
 		pin-sclk = <18>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	uart1 {
@@ -50,7 +44,5 @@
 		port = <UART_NUM_1>;
 		pin-tx = <3>;
 		pin-rx = <1>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 };

Devices/cyd-2432s032c/cyd,2432s032c.dts

@@ -28,9 +28,6 @@
 		pin-mosi = <13>;
 		pin-miso = <GPIO_PIN_NONE>;
 		pin-sclk = <14>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	sdcard_spi: spi1 {
@@ -39,8 +36,5 @@
 		pin-mosi = <23>;
 		pin-miso = <19>;
 		pin-sclk = <18>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 };

Devices/cyd-4848s040c/cyd,4848s040c.dts

@@ -28,8 +28,6 @@
 		pin-mosi = <47>;
 		pin-miso = <41>;
 		pin-sclk = <48>;
-		pin-wp = <GPIO_PIN_NONE>;
 		pin-hd = <42>;
-		max-transfer-size = <0>;
 	};
 };

Devices/cyd-8048s043c/cyd,8048s043c.dts

@@ -37,9 +37,6 @@
 		pin-mosi = <11>;
 		pin-miso = <13>;
 		pin-sclk = <12>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	uart1 {
@@ -47,7 +44,5 @@
 		port = <UART_NUM_1>;
 		pin-tx = <18>;
 		pin-rx = <17>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 };

Devices/cyd-e32r28t/cyd,e32r28t.dts

@@ -19,9 +19,6 @@
 		pin-mosi = <13>;
 		pin-miso = <12>;
 		pin-sclk = <14>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	sdcard_spi: spi1 {
@@ -30,8 +27,5 @@
 		pin-mosi = <23>;
 		pin-miso = <19>;
 		pin-sclk = <18>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 };

Devices/cyd-e32r32p/cyd,e32r32p.dts

@@ -28,9 +28,6 @@
 		pin-mosi = <13>;
 		pin-miso = <12>;
 		pin-sclk = <14>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	sdcard_spi: spi1 {
@@ -39,8 +36,5 @@
 		pin-mosi = <23>;
 		pin-miso = <19>;
 		pin-sclk = <18>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 };

Devices/elecrow-crowpanel-advance-28/elecrow,crowpanel-advance-28.dts

@@ -27,11 +27,7 @@
 		compatible = "espressif,esp32-spi";
 		host = <SPI2_HOST>;
 		pin-mosi = <39>;
-		pin-miso = <GPIO_PIN_NONE>;
 		pin-sclk = <42>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	sdcard_spi: spi1 {
@@ -40,9 +36,6 @@
 		pin-mosi = <6>;
 		pin-miso = <4>;
 		pin-sclk = <5>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	uart0 {
@@ -50,8 +43,6 @@
 		port = <UART_NUM_0>;
 		pin-tx = <43>;
 		pin-rx = <44>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 
 	uart1 {
@@ -59,7 +50,5 @@
 		port = <UART_NUM_1>;
 		pin-tx = <17>;
 		pin-rx = <18>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 };

Devices/elecrow-crowpanel-advance-35/elecrow,crowpanel-advance-35.dts

@@ -29,9 +29,6 @@
 		pin-mosi = <39>;
 		pin-miso = <GPIO_PIN_NONE>;
 		pin-sclk = <42>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	sdcard_spi: spi1 {
@@ -40,9 +37,6 @@
 		pin-mosi = <6>;
 		pin-miso = <4>;
 		pin-sclk = <5>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	uart0 {
@@ -50,8 +44,6 @@
 		port = <UART_NUM_0>;
 		pin-tx = <43>;
 		pin-rx = <44>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 
 	uart1 {
@@ -59,7 +51,5 @@
 		port = <UART_NUM_1>;
 		pin-tx = <17>;
 		pin-rx = <18>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 };

Devices/elecrow-crowpanel-advance-50/elecrow,crowpanel-advance-50.dts

@@ -29,9 +29,6 @@
 		pin-mosi = <6>;
 		pin-miso = <4>;
 		pin-sclk = <5>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	uart0 {
@@ -39,8 +36,6 @@
 		port = <UART_NUM_0>;
 		pin-tx = <43>;
 		pin-rx = <44>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 
 	uart1 {
@@ -48,7 +43,5 @@
 		port = <UART_NUM_1>;
 		pin-tx = <20>;
 		pin-rx = <19>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 };

Devices/elecrow-crowpanel-basic-28/elecrow,crowpanel-basic-28.dts

@@ -29,8 +29,6 @@
 		pin-mosi = <13>;
 		pin-miso = <12>;
 		pin-sclk = <14>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
 		max-transfer-size = <65536>;
 	};
 
@@ -40,9 +38,6 @@
 		pin-mosi = <23>;
 		pin-miso = <19>;
 		pin-sclk = <18>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	uart1 {
@@ -50,7 +45,5 @@
 		port = <UART_NUM_1>;
 		pin-tx = <17>;
 		pin-rx = <16>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 };

Devices/elecrow-crowpanel-basic-35/elecrow,crowpanel-basic-35.dts

@@ -29,8 +29,6 @@
 		pin-mosi = <13>;
 		pin-miso = <33>;
 		pin-sclk = <14>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
 		max-transfer-size = <65536>;
 	};
 
@@ -40,9 +38,6 @@
 		pin-mosi = <23>;
 		pin-miso = <19>;
 		pin-sclk = <18>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	uart1 {
@@ -50,7 +45,5 @@
 		port = <UART_NUM_1>;
 		pin-tx = <1>;
 		pin-rx = <3>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 };

Devices/elecrow-crowpanel-basic-50/elecrow,crowpanel-basic-50.dts

@@ -29,9 +29,6 @@
 		pin-mosi = <11>;
 		pin-miso = <13>;
 		pin-sclk = <12>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	uart0 {
@@ -39,7 +36,5 @@
 		port = <UART_NUM_0>;
 		pin-tx = <43>;
 		pin-rx = <44>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 };

Devices/guition-jc2432w328c/guition,jc2432w328c.dts

@@ -36,11 +36,7 @@
 		compatible = "espressif,esp32-spi";
 		host = <SPI2_HOST>;
 		pin-mosi = <13>;
-		pin-miso = <GPIO_PIN_NONE>;
 		pin-sclk = <14>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	sdcard_spi: spi1 {
@@ -49,9 +45,6 @@
 		pin-mosi = <23>;
 		pin-miso = <19>;
 		pin-sclk = <18>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	// CN1 header, JST SH 1.25, GND / IO22 / IO21 / 3.3V
@@ -60,7 +53,5 @@
 		port = <UART_NUM_1>;
 		pin-tx = <22>;
 		pin-rx = <21>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 };

Devices/guition-jc3248w535c/guition,jc3248w535c.dts

@@ -39,7 +39,6 @@
 		pin-sclk = <47>;
 		pin-wp = <40>;
 		pin-hd = <39>;
-		max-transfer-size = <0>;
 	};
 
 	sdcard_spi: spi1 {
@@ -48,9 +47,6 @@
 		pin-mosi = <11>;
 		pin-miso = <13>;
 		pin-sclk = <12>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	// P1 header
@@ -59,7 +55,5 @@
 		port = <UART_NUM_0>;
 		pin-tx = <43>;
 		pin-rx = <44>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 };

Devices/guition-jc8048w550c/guition,jc8048w550c.dts

@@ -37,9 +37,6 @@
 		pin-mosi = <11>;
 		pin-miso = <13>;
 		pin-sclk = <12>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	uart1 {
@@ -47,7 +44,5 @@
 		port = <UART_NUM_1>;
 		pin-tx = <18>;
 		pin-rx = <17>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 };

Devices/lilygo-tdeck/lilygo,tdeck.dts

@@ -39,8 +39,6 @@
 		pin-bclk = <7>;
 		pin-ws = <5>;
 		pin-data-out = <6>;
-		pin-data-in = <GPIO_PIN_NONE>;
-		pin-mclk = <GPIO_PIN_NONE>;
 	};
 
 	spi0 {
@@ -49,9 +47,6 @@
 		pin-mosi = <41>;
 		pin-miso = <38>;
 		pin-sclk = <40>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	uart1 {
@@ -59,7 +54,5 @@
 		port = <UART_NUM_1>;
 		pin-tx = <43>;
 		pin-rx = <44>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 };

Devices/lilygo-tdisplay-s3/lilygo,tdisplay-s3.dts

@@ -18,10 +18,6 @@
 		compatible = "espressif,esp32-spi";
 		host = <SPI2_HOST>;
 		pin-mosi = <7>;
-		pin-miso = <GPIO_PIN_NONE>;
 		pin-sclk = <6>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 };

Devices/lilygo-tdisplay/lilygo,tdisplay.dts

@@ -18,10 +18,6 @@
 		compatible = "espressif,esp32-spi";
 		host = <SPI2_HOST>;
 		pin-mosi = <19>;
-		pin-miso = <GPIO_PIN_NONE>;
 		pin-sclk = <18>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 };

Devices/lilygo-tdongle-s3/lilygo,tdongle-s3.dts

@@ -27,11 +27,7 @@
 		compatible = "espressif,esp32-spi";
 		host = <SPI2_HOST>;
 		pin-mosi = <3>;
-		pin-miso = <GPIO_PIN_NONE>;
 		pin-sclk = <5>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	stemma_qt: uart1 {
@@ -39,7 +35,5 @@
 		port = <UART_NUM_1>;
 		pin-tx = <43>;
 		pin-rx = <44>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 };

Devices/lilygo-tlora-pager/lilygo,tlora-pager.dts

@@ -31,9 +31,6 @@
 		pin-mosi = <34>;
 		pin-miso = <33>;
 		pin-sclk = <35>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	// ES8311
@@ -53,8 +50,6 @@
 		port = <UART_NUM_0>;
 		pin-tx = <12>;
 		pin-rx = <4>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 
 	uart_external: uart1 {
@@ -62,7 +57,5 @@
 		port = <UART_NUM_1>;
 		pin-tx = <43>;
 		pin-rx = <44>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 };

Devices/m5stack-cardputer-adv/m5stack,cardputer-adv.dts

@@ -37,11 +37,7 @@
 		compatible = "espressif,esp32-spi";
 		host = <SPI2_HOST>;
 		pin-mosi = <35>;
-		pin-miso = <GPIO_PIN_NONE>;
 		pin-sclk = <36>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	sdcard_spi: spi1 {
@@ -50,9 +46,6 @@
 		pin-mosi = <14>;
 		pin-miso = <39>;
 		pin-sclk = <40>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	// Speaker and microphone (ES8311)
@@ -63,7 +56,6 @@
 		pin-ws = <43>;
 		pin-data-out = <42>;
 		pin-data-in = <46>;
-		pin-mclk = <GPIO_PIN_NONE>;
 	};
 
 	uart_port_a: uart1 {
@@ -71,7 +63,5 @@
 		port = <UART_NUM_1>;
 		pin-tx = <1>;
 		pin-rx = <2>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 };

Devices/m5stack-cardputer/m5stack,cardputer.dts

@@ -29,11 +29,7 @@
 		compatible = "espressif,esp32-spi";
 		host = <SPI2_HOST>;
 		pin-mosi = <35>;
-		pin-miso = <GPIO_PIN_NONE>;
 		pin-sclk = <36>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	sdcard_spi: spi1 {
@@ -42,9 +38,6 @@
 		pin-mosi = <14>;
 		pin-miso = <39>;
 		pin-sclk = <40>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	// Speaker and microphone
@@ -56,7 +49,6 @@
 		pin-ws = <43>;
 		pin-data-out = <42>;
 		pin-data-in = <46>;
-		pin-mclk = <GPIO_PIN_NONE>;
 	};
 
 	uart_port_a: uart1 {
@@ -64,7 +56,5 @@
 		port = <UART_NUM_1>;
 		pin-tx = <1>;
 		pin-rx = <2>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 };

Devices/m5stack-core2/m5stack,core2.dts

@@ -39,9 +39,6 @@
 		pin-mosi = <23>;
 		pin-miso = <38>;
 		pin-sclk = <18>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	// NS4168: Speaker and microphone
@@ -53,7 +50,6 @@
 		pin-ws = <0>;
 		pin-data-out = <2>;
 		pin-data-in = <34>;
-		pin-mclk = <GPIO_PIN_NONE>;
 	};
 
 	uart_port_a: uart1 {
@@ -61,7 +57,5 @@
 		port = <UART_NUM_1>;
 		pin-tx = <33>;
 		pin-rx = <32>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 };

Devices/m5stack-cores3/m5stack,cores3.dts

@@ -55,9 +55,6 @@
 		pin-mosi = <37>;
 		pin-miso = <35>;
 		pin-sclk = <36>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	// TODO: Enable speaker via ES7210 I2C: https://github.com/m5stack/M5Unified/blob/a6256725481f1bc366655fa48cf03b6095e30ad1/src/M5Unified.cpp#L417
@@ -79,7 +76,5 @@
 		port = <UART_NUM_1>;
 		pin-tx = <1>;
 		pin-rx = <2>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 };

Devices/m5stack-papers3/m5stack,papers3.dts

@@ -28,8 +28,6 @@
 		pin-mosi = <38>;
 		pin-miso = <40>;
 		pin-sclk = <39>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
 		max-transfer-size = <4096>;
 	};
 };

Devices/m5stack-stickc-plus/m5stack,stickc-plus.dts

@@ -35,11 +35,7 @@
 		compatible = "espressif,esp32-spi";
 		host = <SPI2_HOST>;
 		pin-mosi = <15>;
-		pin-miso = <GPIO_PIN_NONE>;
 		pin-sclk = <13>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	uart_grove: uart1 {
@@ -47,7 +43,5 @@
 		port = <UART_NUM_1>;
 		pin-tx = <33>;
 		pin-rx = <32>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 };

Devices/m5stack-stickc-plus2/m5stack,stickc-plus2.dts

@@ -34,11 +34,7 @@
 		compatible = "espressif,esp32-spi";
 		host = <SPI2_HOST>;
 		pin-mosi = <15>;
-		pin-miso = <GPIO_PIN_NONE>;
 		pin-sclk = <13>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	uart_grove: uart1 {
@@ -46,7 +42,5 @@
 		port = <UART_NUM_1>;
 		pin-tx = <33>;
 		pin-rx = <32>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 };

Devices/m5stack-tab5/m5stack,tab5.dts

@@ -36,8 +36,5 @@
 		pin-mosi = <44>;
 		pin-miso = <39>;
 		pin-sclk = <43>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 };

Devices/unphone/unphone.dts

@@ -28,8 +28,6 @@
 		pin-mosi = <40>;
 		pin-miso = <41>;
 		pin-sclk = <39>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
 		max-transfer-size = <65536>;
 	};
 };

Devices/waveshare-esp32-s3-geek/waveshare,esp32-s3-geek.dts

@@ -27,11 +27,7 @@
 		compatible = "espressif,esp32-spi";
 		host = <SPI2_HOST>;
 		pin-mosi = <11>;
-		pin-miso = <GPIO_PIN_NONE>;
 		pin-sclk = <12>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	uart0 {
@@ -39,7 +35,5 @@
 		port = <UART_NUM_0>;
 		pin-tx = <43>;
 		pin-rx = <44>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 };

Devices/waveshare-s3-lcd-13/waveshare,s3-lcd-13.dts

@@ -27,11 +27,7 @@
 		compatible = "espressif,esp32-spi";
 		host = <SPI2_HOST>;
 		pin-mosi = <41>;
-		pin-miso = <GPIO_PIN_NONE>;
 		pin-sclk = <40>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	spi1 {
@@ -40,8 +36,5 @@
 		pin-mosi = <18>;
 		pin-miso = <16>;
 		pin-sclk = <21>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 };

Devices/waveshare-s3-touch-lcd-128/waveshare,s3-touch-lcd-128.dts

@@ -29,9 +29,6 @@
 		pin-mosi = <11>;
 		pin-miso = <12>;
 		pin-sclk = <10>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	sdcard_spi: spi1 {
@@ -40,8 +37,5 @@
 		pin-mosi = <16>;
 		pin-miso = <15>;
 		pin-sclk = <17>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 };

Devices/waveshare-s3-touch-lcd-147/waveshare,s3-touch-lcd-147.dts

@@ -29,9 +29,6 @@
 		pin-mosi = <39>;
 		pin-miso = <GPIO_PIN_NONE>;
 		pin-sclk = <38>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	sdcard_spi: spi1 {
@@ -40,8 +37,5 @@
 		pin-mosi = <15>;
 		pin-miso = <17>;
 		pin-sclk = <16>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 };

Devices/waveshare-s3-touch-lcd-43/waveshare,s3-touch-lcd-43.dts

@@ -29,9 +29,6 @@
 		pin-mosi = <11>;
 		pin-miso = <13>;
 		pin-sclk = <12>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 
 	uart1 {
@@ -39,7 +36,5 @@
 		port = <UART_NUM_1>;
 		pin-tx = <43>;
 		pin-rx = <44>;
-		pin-cts = <GPIO_PIN_NONE>;
-		pin-rts = <GPIO_PIN_NONE>;
 	};
 };

Devices/wireless-tag-wt32-sc01-plus/wireless-tag,wt32-sc01-plus.dts

@@ -28,8 +28,5 @@
 		pin-mosi = <40>;
 		pin-miso = <38>;
 		pin-sclk = <39>;
-		pin-wp = <GPIO_PIN_NONE>;
-		pin-hd = <GPIO_PIN_NONE>;
-		max-transfer-size = <0>;
 	};
 };

Documentation/ideas.md

@@ -12,8 +12,6 @@
 ## Higher Priority
 
 - Make a root device type so it can be discovered more easily.
-- DTS/yaml: Consider support for default values.
-- DTS: throw custom exceptions and catch them to show cleaner error messages.
 - When device.py selects a new device, it should automatically delete the build dirs (build/, cmake-*/) when it detects that the platform has changed.
 - Add font design tokens such as "regular", "title" and "smaller". Perhaps via the LVGL kernel module.
 - Add kernel listening mechanism so that the root device init can be notified when a device becomes available: 
@@ -69,8 +67,6 @@
 
 ## Lower Priority
 
-- Rename `Lock::lock()` and `Lock::unlock()` to `Lock::acquire()` and `Lock::release()`?
-- Implement system suspend that turns off the screen
 - The boot button on some devices can be used as GPIO_NUM_0 at runtime
 - Localize all apps
 - Support hot-plugging SD card (note: this is not possible if they require the CS pin hack)

Firmware/CMakeLists.txt

@@ -51,7 +51,7 @@ add_custom_target(AlwaysRun
 add_custom_command(
     OUTPUT "${GENERATED_DIR}/devicetree.c"
         "${GENERATED_DIR}/devicetree.h"
-    COMMAND pip install lark pyyaml
+    COMMAND pip install lark==1.3.1 pyyaml==6.0.3
     COMMAND python "${CMAKE_SOURCE_DIR}/Buildscripts/DevicetreeCompiler/compile.py"
     "${DEVICETREE_LOCATION}" "${GENERATED_DIR}"
     WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"

Platforms/PlatformEsp32/Bindings/espressif,esp32-i2c.yaml

@@ -7,16 +7,20 @@ compatible: "espressif,esp32-i2c"
 properties:
   port:
     type: int
+    required: true
     description: |
       The port number, defined by i2c_port_t.
       Depending on the hardware, these values are available: I2C_NUM_0, I2C_NUM_1, LP_I2C_NUM_0
   clock-frequency:
     type: int
+    required: true
     description: Initial clock frequency in Hz
   pin-sda:
     type: int
+    required: true
   pin-scl:
     type: int
+    required: true
   pin-sda-pull-up:
     type: bool
     description: enable internal pull-up resistor for SDA pin

Platforms/PlatformEsp32/Bindings/espressif,esp32-i2s.yaml

@@ -21,13 +21,14 @@ properties:
     description: WS pin
   pin-data-out:
     type: int
-    required: true
+    default: GPIO_PIN_NONE
     description: DATA OUT pin
   pin-data-in:
     type: int
-    required: true
+    default: GPIO_PIN_NONE
     description: DATA IN pin
   pin-mclk:
     type: int
-    required: true
+    required: false
+    default: GPIO_PIN_NONE
     description: MCLK pin

Platforms/PlatformEsp32/Bindings/espressif,esp32-spi.yaml

@@ -13,11 +13,11 @@ properties:
       Defined by spi_host_device_t (e.g. SPI2_HOST, SPI3_HOST).
   pin-mosi:
     type: int
-    required: true
+    default: GPIO_PIN_NONE
     description: MOSI (Data 0) pin
   pin-miso:
     type: int
-    required: true
+    default: GPIO_PIN_NONE
     description: MISO (Data 1) pin
   pin-sclk:
     type: int
@@ -25,12 +25,15 @@ properties:
     description: Clock pin
   pin-wp:
     type: int
+    default: GPIO_PIN_NONE
     description: WP (Data 2) pin
   pin-hd:
     type: int
+    default: GPIO_PIN_NONE
     description: HD (Data 3) pin
   max-transfer-size:
     type: int
+    default: 0
     description: |
       Data transfer size limit in bytes. 
       0 means the platform decides the limit.

Platforms/PlatformEsp32/Bindings/espressif,esp32-uart.yaml

@@ -21,7 +21,9 @@ properties:
     description: RX pin
   pin-cts:
     type: int
+    default: GPIO_PIN_NONE
     description: CTS pin
   pin-rts:
     type: int
+    default: GPIO_PIN_NONE
     description: RTS pin