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3ce0d62b39
It supports NVRAM access described using DT binding. Right now NVRAM
data is exposed using /sys/bus/nvmem/ only.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit 01b1b37528)
57 lines
1.6 KiB
Diff
57 lines
1.6 KiB
Diff
From c39edb9f9dcb6c8a0ba0ebf5df9e0ac93ab94b82 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
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Date: Fri, 5 Mar 2021 19:32:35 +0100
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Subject: [PATCH] dt-bindings: nvmem: add Broadcom's NVRAM
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Broadcom's NVRAM structure contains device data and can be accessed
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using I/O mapping.
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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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Reviewed-by: Rob Herring <robh@kernel.org>
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Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
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---
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.../devicetree/bindings/nvmem/brcm,nvram.yaml | 34 +++++++++++++++++++
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1 file changed, 34 insertions(+)
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create mode 100644 Documentation/devicetree/bindings/nvmem/brcm,nvram.yaml
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--- /dev/null
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+++ b/Documentation/devicetree/bindings/nvmem/brcm,nvram.yaml
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@@ -0,0 +1,34 @@
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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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+%YAML 1.2
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+---
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+$id: http://devicetree.org/schemas/nvmem/brcm,nvram.yaml#
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+$schema: http://devicetree.org/meta-schemas/core.yaml#
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+
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+title: Broadcom's NVRAM
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+
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+description: |
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+ Broadcom's NVRAM is a structure containing device specific environment
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+ variables. It is used for storing device configuration, booting parameters
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+ and calibration data.
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+
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+ NVRAM can be accessed on Broadcom BCM47xx MIPS and Northstar ARM Cortex-A9
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+ devices usiong I/O mapped memory.
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+
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+maintainers:
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+ - Rafał Miłecki <rafal@milecki.pl>
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+
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+allOf:
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+ - $ref: "nvmem.yaml#"
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+
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+properties:
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+ compatible:
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+ const: brcm,nvram
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+
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+unevaluatedProperties: false
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+
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+examples:
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+ - |
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+ nvram@1eff0000 {
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+ compatible = "brcm,nvram";
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+ reg = <0x1eff0000 0x10000>;
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+ };
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