linux-kernel - [PATCH v2 1/6] dt-bindings: reserved-memory: Add Owl SoC serial number binding

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Message-Id: <fb74862bec15f1e9e0c4d8b70ebd6c07c6eb1a40.1617110420.git.cristian.ciocaltea@gmail.com>
Date:   Tue, 30 Mar 2021 16:48:16 +0300
From:   Cristian Ciocaltea <cristian.ciocaltea@...il.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Andreas Färber <afaerber@...e.de>,
        Manivannan Sadhasivam <mani@...nel.org>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-actions@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/6] dt-bindings: reserved-memory: Add Owl SoC serial number binding

Add devicetree binding for the Actions Semi Owl SoC serial number
reserved-memory range.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@...il.com>
---
 .../actions,owl-soc-serial.yaml               | 53 +++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/reserved-memory/actions,owl-soc-serial.yaml

diff --git a/Documentation/devicetree/bindings/reserved-memory/actions,owl-soc-serial.yaml b/Documentation/devicetree/bindings/reserved-memory/actions,owl-soc-serial.yaml
new file mode 100644
index 000000000000..41b71f47ee6c
--- /dev/null
+++ b/Documentation/devicetree/bindings/reserved-memory/actions,owl-soc-serial.yaml
@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/reserved-memory/actions,owl-soc-serial.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Actions Semi Owl reserved-memory for SoC serial number
+
+maintainers:
+  - Cristian Ciocaltea <cristian.ciocaltea@...il.com>
+
+description: |
+  Provide access to the memory region where the two parts of the Actions
+  Semi Owl SoC serial number (low & high) can be read from. This information
+  is provided by the bootloader, hence expose it under /reserved-memory node.
+
+  Please refer to reserved-memory.txt in this directory for common binding
+  part and usage.
+
+  This is currently supported only on the S500 SoC variant.
+
+properties:
+  compatible:
+    oneOf:
+      - const: actions,owl-soc-serial
+      - items:
+          - enum:
+              - actions,s500-soc-serial
+          - const: actions,owl-soc-serial
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: true
+
+examples:
+  - |
+    reserved-memory {
+        #address-cells = <1>;
+        #size-cells = <1>;
+        ranges;
+
+        soc_serial: soc-serial@800 {
+            compatible = "actions,s500-soc-serial", "actions,owl-soc-serial";
+            reg = <0x800 0x8>;
+        };
+    };
+
+...
-- 
2.31.1