From: Shawn Anastasio <sanastasio@raptorengineering.com>

The Sony Cronos Platform Controller is a multi-purpose platform controller
that provides both a watchdog timer and an LED controller for the Sony
Interactive Entertainment Cronos x86 server platform. As both functions
are provided by the same CPLD, a multi-function device is exposed as the
parent of both functions.

Add a DT binding for this device.

Signed-off-by: Shawn Anastasio <sanastasio@raptorengineering.com>
Signed-off-by: Timothy Pearson <tpearson@raptorengineering.com>
---
 .../bindings/mfd/sony,cronos-smc.yaml         | 115 ++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/sony,cronos-smc.yaml

diff --git a/Documentation/devicetree/bindings/mfd/sony,cronos-smc.yaml b/Documentation/devicetree/bindings/mfd/sony,cronos-smc.yaml
new file mode 100644
index 000000000000..288ef3343c51
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/sony,cronos-smc.yaml
@@ -0,0 +1,115 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2025 Raptor Engineering, LLC
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/sony,cronos-smc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sony Cronos Platform Controller CPLD multi-function device
+
+maintainers:
+  - Georgy Yakovlev <Georgy.Yakovlev@sony.com>
+
+description:
+  The Sony Cronos Platform Controller CPLD is a multi-purpose platform
+  controller that provides both a watchdog timer and an LED controller for the
+  Sony Interactive Entertainment Cronos x86 server platform. As both functions
+  are provided by the same CPLD, a multi-function device is exposed as the
+  parent of both functions.
+
+properties:
+  compatible:
+    const: sony,cronos-smc
+
+  reg:
+    maxItems: 1
+
+  leds:
+    type: object
+    additionalProperties: false
+    description: |
+      The Cronos LED controller is a subfunction of the Cronos platform
+      controller, which is a multi-function device.
+
+      Each led is represented as a child node of sony,cronos-led. Fifteen RGB
+      LEDs are supported by the platform.
+
+    properties:
+      compatible:
+        const: sony,cronos-led
+
+      reg:
+        maxItems: 1
+
+      "#address-cells":
+        const: 1
+
+      "#size-cells":
+        const: 0
+
+    patternProperties:
+      "^multi-led@[0-9a-f]$":
+        type: object
+        $ref: leds-class-multicolor.yaml#
+        unevaluatedProperties: false
+
+        properties:
+          reg:
+            description:
+              LED channel number (0..14)
+            minimum: 0
+            maximum: 14
+
+        required:
+          - reg
+
+    required:
+      - compatible
+      - "#address-cells"
+      - "#size-cells"
+
+required:
+  - compatible
+  - reg
+
+allOf:
+  - $ref: /schemas/watchdog/watchdog.yaml
+
+unevaluatedProperties: false
+
+examples:
+  - |
+
+    #include <dt-bindings/leds/common.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        smc@3f {
+            compatible = "sony,cronos-smc";
+            reg = <0x3f>;
+
+            timeout-sec = <20>;
+
+            watchdog {
+                compatible = "sony,cronos-watchdog";
+            };
+
+            leds {
+                compatible = "sony,cronos-led";
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                multi-led@0 {
+                    /*
+                     * No subnodes are needed, this controller only supports RGB
+                     * LEDs.
+                     */
+                    reg = <0>;
+                    color = <LED_COLOR_ID_MULTI>;
+                    function = LED_FUNCTION_STATUS;
+                };
+            };
+        };
+    };
\ No newline at end of file
-- 
2.39.5

On Thu, 04 Dec 2025 12:50:12 -0600, Timothy Pearson wrote:
> From: Shawn Anastasio <sanastasio@raptorengineering.com>
> 
> The Sony Cronos Platform Controller is a multi-purpose platform controller
> that provides both a watchdog timer and an LED controller for the Sony
> Interactive Entertainment Cronos x86 server platform. As both functions
> are provided by the same CPLD, a multi-function device is exposed as the
> parent of both functions.
> 
> Add a DT binding for this device.
> 
> Signed-off-by: Shawn Anastasio <sanastasio@raptorengineering.com>
> Signed-off-by: Timothy Pearson <tpearson@raptorengineering.com>
> ---
>  .../bindings/mfd/sony,cronos-smc.yaml         | 115 ++++++++++++++++++
>  1 file changed, 115 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mfd/sony,cronos-smc.yaml
> 

My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:
./Documentation/devicetree/bindings/mfd/sony,cronos-smc.yaml:115:7: [error] no new line character at the end of file (new-line-at-end-of-file)

dtschema/dtc warnings/errors:
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/mfd/sony,cronos-smc.yaml: Unresolvable reference: leds-class-multicolor.yaml#
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/mfd/sony,cronos-smc.example.dtb: smc@3f (sony,cronos-smc): $nodename:0: 'smc@3f' does not match '^(pmic|timer|watchdog)(@.*|-([0-9]|[1-9][0-9]+))?$'
	from schema $id: http://devicetree.org/schemas/mfd/sony,cronos-smc.yaml
Traceback (most recent call last):
  File "/usr/local/lib/python3.13/dist-packages/referencing/_core.py", line 428, in get_or_retrieve
    resource = registry._retrieve(uri)
  File "/usr/local/lib/python3.13/dist-packages/dtschema/validator.py", line 426, in retrieve
    return DRAFT201909.create_resource(self.schemas[uri])
                                       ~~~~~~~~~~~~^^^^^
KeyError: 'http://devicetree.org/schemas/mfd/leds-class-multicolor.yaml'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/local/lib/python3.13/dist-packages/referencing/_core.py", line 682, in lookup
    retrieved = self._registry.get_or_retrieve(uri)
  File "/usr/local/lib/python3.13/dist-packages/referencing/_core.py", line 435, in get_or_retrieve
    raise exceptions.Unretrievable(ref=uri) from error
referencing.exceptions.Unretrievable: 'http://devicetree.org/schemas/mfd/leds-class-multicolor.yaml'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/local/lib/python3.13/dist-packages/jsonschema/validators.py", line 463, in _validate_reference
    resolved = self._resolver.lookup(ref)
  File "/usr/local/lib/python3.13/dist-packages/referencing/_core.py", line 686, in lookup
    raise exceptions.Unresolvable(ref=ref) from error
referencing.exceptions.Unresolvable: leds-class-multicolor.yaml#

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/local/bin/dt-validate", line 8, in <module>
    sys.exit(main())
             ~~~~^^
  File "/usr/local/lib/python3.13/dist-packages/dtschema/dtb_validate.py", line 158, in main
    sg.check_dtb(filename)
    ~~~~~~~~~~~~^^^^^^^^^^
  File "/usr/local/lib/python3.13/dist-packages/dtschema/dtb_validate.py", line 95, in check_dtb
    self.check_subtree(dt, subtree, False, "/", "/", filename)
    ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/dist-packages/dtschema/dtb_validate.py", line 88, in check_subtree
    self.check_subtree(tree, value, disabled, name, fullname + name, filename)
    ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/dist-packages/dtschema/dtb_validate.py", line 88, in check_subtree
    self.check_subtree(tree, value, disabled, name, fullname + name, filename)
    ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/dist-packages/dtschema/dtb_validate.py", line 88, in check_subtree
    self.check_subtree(tree, value, disabled, name, fullname + name, filename)
    ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/dist-packages/dtschema/dtb_validate.py", line 83, in check_subtree
    self.check_node(tree, subtree, disabled, nodename, fullname, filename)
    ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/dist-packages/dtschema/dtb_validate.py", line 34, in check_node
    for error in self.validator.iter_errors(node, filter=match_schema_file,
                 ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                                            compatible_match=compatible_match):
                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/dist-packages/dtschema/validator.py", line 448, in iter_errors
    for error in self.DtValidator(schema, registry=self.registry).iter_errors(instance):
                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^
  File "/usr/local/lib/python3.13/dist-packages/jsonschema/validators.py", line 384, in iter_errors
    for error in errors:
                 ^^^^^^
  File "/usr/local/lib/python3.13/dist-packages/jsonschema/_keywords.py", line 296, in properties
    yield from validator.descend(
    ...<4 lines>...
    )
  File "/usr/local/lib/python3.13/dist-packages/jsonschema/validators.py", line 432, in descend
    for error in errors:
                 ^^^^^^
  File "/usr/local/lib/python3.13/dist-packages/jsonschema/_keywords.py", line 23, in patternProperties
    yield from validator.descend(
        v, subschema, path=k, schema_path=pattern,
    )
  File "/usr/local/lib/python3.13/dist-packages/jsonschema/validators.py", line 432, in descend
    for error in errors:
                 ^^^^^^
  File "/usr/local/lib/python3.13/dist-packages/jsonschema/_keywords.py", line 275, in ref
    yield from validator._validate_reference(ref=ref, instance=instance)
               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/dist-packages/jsonschema/validators.py", line 465, in _validate_reference
    raise exceptions._WrappedReferencingError(err) from err
jsonschema.exceptions._WrappedReferencingError: Unresolvable: leds-class-multicolor.yaml#

doc reference errors (make refcheckdocs):

See https://patchwork.kernel.org/project/devicetree/patch/20251204185015.1364439-2-tpearson@raptorengineering.com

The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.