[PATCH stblinux.git 1/2] dt-bindings: firmware: add Broadcom's NVRAM memory mapping
From: Rafał Miłecki <zajec5@gmail.com>
Date: 2021-03-02 08:40:14
Also in:
linux-arm-kernel, linux-mips, lkml
Subsystem:
open firmware and flattened device tree bindings, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
From: Rafał Miłecki <rafal@milecki.pl> NVRAM structure contains device data and can be accessed using MMIO. Signed-off-by: Rafał Miłecki <rafal@milecki.pl> --- .../bindings/firmware/brcm,nvram.yaml | 41 +++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 Documentation/devicetree/bindings/firmware/brcm,nvram.yaml
diff --git a/Documentation/devicetree/bindings/firmware/brcm,nvram.yaml b/Documentation/devicetree/bindings/firmware/brcm,nvram.yaml
new file mode 100644
index 000000000000..12af8e2e7c9c
--- /dev/null
+++ b/Documentation/devicetree/bindings/firmware/brcm,nvram.yaml@@ -0,0 +1,41 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: "http://devicetree.org/schemas/firmware/brcm,nvram.yaml#" +$schema: "http://devicetree.org/meta-schemas/core.yaml#" + +title: Broadcom's NVRAM + +maintainers: + - Rafał Miłecki <rafal@milecki.pl> + +description: | + NVRAM is a structure containing device specific environment variables. + It is used for storing device configuration, booting parameters and + calibration data. + + It's required very early in booting process and so is made available + using memory mapping. + + NVRAM can be found on Broadcom BCM47xx MIPS, Northstar ARM Cortex-A9 + and some more devices. + +properties: + compatible: + const: brcm,nvram + + reg: + description: memory region with NVRAM data + maxItems: 1 + +required: + - reg + +additionalProperties: false + +examples: + - | + nvram@1e000000 { + compatible = "brcm,nvram"; + reg = <0x1e000000 0x10000>; + };
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2.26.2