[PATCH 1/2] dt-bindings: nvmem: io: new binding for IO accessible NVMEM devices

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From: Rafał Miłecki <rafal@xxxxxxxxxx>

With the NVMEM layouts binding in place we should now use:
1. NVMEM device access bindings
2. NVMEM content description bindings

This binding allows describing NVMEM devices that can be accessed using
IO mappings.

Signed-off-by: Rafał Miłecki <rafal@xxxxxxxxxx>
---
 .../devicetree/bindings/nvmem/io.yaml         | 37 +++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/nvmem/io.yaml

diff --git a/Documentation/devicetree/bindings/nvmem/io.yaml b/Documentation/devicetree/bindings/nvmem/io.yaml
new file mode 100644
index 000000000000..67e0aae9cd94
--- /dev/null
+++ b/Documentation/devicetree/bindings/nvmem/io.yaml
@@ -0,0 +1,37 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/nvmem/io.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: IO access based NVMEM
+
+description: |
+  This binding describes simple NVMEM devices that can be accessed by simply
+  mapping a predefined IO address.
+
+  It's a generic solution for providing NVMEM content access. The way of
+  handling actual content may be device specific and can be described using a
+  proper layout.
+
+maintainers:
+  - Rafał Miłecki <rafal@xxxxxxxxxx>
+
+allOf:
+  - $ref: nvmem.yaml#
+
+properties:
+  compatible:
+    const: io-nvmem
+
+  reg:
+    maxItems: 1
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    nvmem@10000 {
+        compatible = "io-nvmem";
+        reg = <0x10000000 0x10000>;
+    };
-- 
2.34.1




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