linux-kernel - [PATCH 2/3] dt-bindings: mfd: sie,cronos-cpld: Add initial DT binding

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Date:   Mon,  2 Oct 2023 17:32:21 -0500
From:   Shawn Anastasio <sanastasio@...torengineering.com>
To:     devicetree@...r.kernel.org, lee@...nel.org,
        Conor Dooley <conor+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Shawn Anastasio <sanastasio@...torengineering.com>,
        Timothy Pearson <tpearson@...torengineering.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] dt-bindings: mfd: sie,cronos-cpld: Add initial DT binding

The SIE Cronos Platform Controller CPLD is a multi-purpose platform
controller that provides both a watchdog timer and an LED controller. 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@...torengineering.com>
---
 .../bindings/mfd/sie,cronos-cpld.yaml         | 67 +++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/sie,cronos-cpld.yaml

diff --git a/Documentation/devicetree/bindings/mfd/sie,cronos-cpld.yaml b/Documentation/devicetree/bindings/mfd/sie,cronos-cpld.yaml
new file mode 100644
index 000000000000..3b59cdd46243
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/sie,cronos-cpld.yaml
@@ -0,0 +1,67 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2023 Raptor Engineering, LLC
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/sie,cronos-cpld.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SIE Cronos Platform Controller CPLD multi-function device
+
+maintainers:
+  - Timothy Pearson <tpearson@...torengineering.com>
+
+description: |
+  The SIE Cronos Platform Controller CPLD is a multi-purpose platform controller
+  that provides both a watchdog timer and an LED controller. As both functions
+  are provided by the same CPLD, a multi-function device is exposed as the
+  parent of both functions.
+
+properties:
+  compatible:
+    const: sie,cronos-cpld
+
+  reg:
+    maxItems: 1
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 1
+
+  leds:
+    type: object
+    description: Cronos Platform Status LEDs
+
+    properties:
+      compatible:
+        const: sie,cronos-leds
+
+  watchdog:
+    type: object
+    description: Cronos Platform Watchdog Timer
+
+    properties:
+      compatible:
+        const: sie,cronos-watchdog
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    cpld: cpld@3f {
+      compatible = "sie,cronos-cpld";
+      reg = <0x3f>;
+
+      watchdog {
+        compatible = "sie,cronos-watchdog";
+      };
+
+      leds {
+        compatible = "sie,cronos-leds";
+      };
+    };
-- 
2.30.2