# \[PATCH V2 1/2\] dt-bindings: nvmem: add Broadcom's NVRAM

- From: Rafał Miłecki \<zajec5@gmail.com\>
- Date: 2021-03-05 18:36:19 
- List: linux-arm-kernel
- Page: https://ratatoskr.run/linux-arm-kernel/2021/03/6290309
- Thread: https://ratatoskr.run/linux-devicetree/2021/03/6290309/t.md

```text
From: Rafał Miłecki <rafal@milecki.pl>

Broadcom's NVRAM structure contains device data and can be accessed
using I/O mapping.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
---
V2: Use Broadcom's NVRAM specific binding. Generic "nvmem-iomap" binding
    didn't make much sense. Thanks Srinivas!
---
 .../devicetree/bindings/nvmem/brcm,nvram.yaml | 34 +++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/nvmem/brcm,nvram.yaml

diff --git a/Documentation/devicetree/bindings/nvmem/brcm,nvram.yaml b/Documentation/devicetree/bindings/nvmem/brcm,nvram.yaml
new file mode 100644
index 000000000000..58ff6b0bdb1a
--- /dev/null
+++ b/Documentation/devicetree/bindings/nvmem/brcm,nvram.yaml
@@ -0,0 +1,34 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/nvmem/brcm,nvram.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom's NVRAM
+
+description: |
+  Broadcom's NVRAM is a structure containing device specific environment
+  variables. It is used for storing device configuration, booting parameters
+  and calibration data.
+
+  NVRAM can be accessed on Broadcom BCM47xx MIPS and Northstar ARM Cortex-A9
+  devices usiong I/O mapped memory.
+
+maintainers:
+  - Rafał Miłecki <rafal@milecki.pl>
+
+allOf:
+  - $ref: "nvmem.yaml#"
+
+properties:
+  compatible:
+    const: brcm,nvram
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    nvram@1eff0000 {
+            compatible = "brcm,nvram";
+            reg = <0x1eff0000 0x10000>;
+    };
-- 
2.26.2


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```