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U-Boot partition may contain subpartitions. For example Broadcom includes environment data block in the middle of its U-Boot partition. This allows describing Broadcom's U-Boot env data and will allow referencing its NVMEM cell in the future. Ref:118f3fbe51("dt-bindings: mtd: partitions: support label/name only partition") Ref:dd638202df("dt-bindings: mtd: partitions: add additional example for qcom,smem-part") Signed-off-by: Rafał Miłecki <rafal@milecki.pl> Link: https://lore.kernel.org/r/20221018154202.4634-1-zajec5@gmail.com Signed-off-by: Rob Herring <robh@kernel.org>
57 lines
1.3 KiB
YAML
57 lines
1.3 KiB
YAML
# 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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$id: http://devicetree.org/schemas/mtd/partitions/u-boot.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: U-Boot bootloader partition
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description: |
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U-Boot is a bootlodaer commonly used in embedded devices. It's almost always
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located on some kind of flash device.
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Device configuration is stored as a set of environment variables that are
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located in a (usually standalone) block of data.
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maintainers:
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- Rafał Miłecki <rafal@milecki.pl>
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allOf:
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- $ref: partition.yaml#
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properties:
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compatible:
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oneOf:
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- const: brcm,u-boot
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description: |
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Broadcom stores environment variables inside a U-Boot partition. They
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can be identified by a custom header with magic value.
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patternProperties:
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"^partition-.*$":
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$ref: partition.yaml#
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unevaluatedProperties: false
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examples:
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- |
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partitions {
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compatible = "fixed-partitions";
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#address-cells = <1>;
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#size-cells = <1>;
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partition@0 {
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compatible = "brcm,u-boot";
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reg = <0x0 0x100000>;
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label = "u-boot";
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partition-u-boot-env {
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};
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};
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partition@100000 {
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reg = <0x100000 0x1ff00000>;
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label = "firmware";
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};
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};
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