[PATCH 1/6] dt-bindings: mfd: add binding for Apple Mac System Management Controller

["Russell King (Oracle)" <rmk+kernel@xxxxxxxxxxxxxxx>]

Add a DT binding for the Apple Mac System Management Controller.

Signed-off-by: Russell King (Oracle) <rmk+kernel@xxxxxxxxxxxxxxx>
---
 .../devicetree/bindings/mfd/apple,smc.yaml    | 53 +++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/apple,smc.yaml

diff --git a/Documentation/devicetree/bindings/mfd/apple,smc.yaml b/Documentation/devicetree/bindings/mfd/apple,smc.yaml
new file mode 100644
index 000000000000..794d3a6eb04a
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/apple,smc.yaml
@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/apple,smc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Apple Mac System Management Controller
+
+maintainers:
+  - Hector Martin <marcan@xxxxxxxxx>
+
+description:
+  Apple Mac System Management Controller implements various functions
+  such as GPIO, RTC, power, reboot.
+
+properties:
+  compatible:
+    items:
+      - enum:
+        - apple,t8103-smc
+        - apple,t8112-smc
+        - apple,t6000-smc
+      - const: apple,smc
+
+  reg:
+    description: Two regions, one for the SMC area and one for the SRAM area.
+
+  reg-names:
+    items:
+      - const: smc
+      - const: sram
+
+  mboxes:
+    description:
+      A phandle to the mailbox channel
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - mboxes
+
+examples:
+  - |
+    smc@23e400000 {
+      compatible = "apple,t8103-smc", "apple,smc";
+      reg = <0x2 0x3e400000 0x0 0x4000>,
+             <0x2 0x3fe00000 0x0 0x100000>;
+      reg-names = "smc", "sram";
+      mboxes = <&smc_mbox>;
+    };
-- 
2.30.2