linux-kernel - [PATCH 1/2] dt-bindings: nvmem: add binding for I/O mapped NVMEM

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Message-Id: <20210304144132.24098-1-zajec5@gmail.com>
Date:   Thu,  4 Mar 2021 15:41:31 +0100
From:   Rafał Miłecki <zajec5@...il.com>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Rob Herring <robh+dt@...nel.org>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mips@...r.kernel.org,
        Florian Fainelli <f.fainelli@...il.com>,
        Vivek Unune <npcomplete13@...il.com>,
        bcm-kernel-feedback-list@...adcom.com,
        linux-kernel@...r.kernel.org,
        Rafał Miłecki <rafal@...ecki.pl>
Subject: [PATCH 1/2] dt-bindings: nvmem: add binding for I/O mapped NVMEM

From: Rafał Miłecki <rafal@...ecki.pl>

NVMEM on some devices can be accessed using I/O mapping. For example on
Broadcom MIPS and ARM Northstar platforms NVRAM can be accessed that
way.

Signed-off-by: Rafał Miłecki <rafal@...ecki.pl>
---
 .../devicetree/bindings/nvmem/iomap.yaml      | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/nvmem/iomap.yaml

diff --git a/Documentation/devicetree/bindings/nvmem/iomap.yaml b/Documentation/devicetree/bindings/nvmem/iomap.yaml
new file mode 100644
index 000000000000..ec8764598061
--- /dev/null
+++ b/Documentation/devicetree/bindings/nvmem/iomap.yaml
@@ -0,0 +1,29 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/nvmem/iomap.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: I/O mapped NVMEM
+
+maintainers:
+  - Rafał Miłecki <rafal@...ecki.pl>
+
+allOf:
+  - $ref: "nvmem.yaml#"
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - brcm,nvram
+      - const: nvmem-iomap
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    nvram@...f0000 {
+            compatible = "brcm,nvram", "nvmem-iomap";
+            reg = <0x1eff0000 0x10000>;
+    };
-- 
2.26.2