a607a850ba
U-Boot doesn't have cells at hardcoded addresses. They are stored in internal format. It's still important to define relevant cells in DT so NVMEM consumers can reference them. Update binding to allow including basic cells as NVMEM device subnodes. Signed-off-by: Rafał Miłecki <rafal@milecki.pl> Reviewed-by: Tom Rini <trini@konsulko.com> Link: https://lore.kernel.org/r/20220703084843.21922-1-zajec5@gmail.com Signed-off-by: Rob Herring <robh@kernel.org>
76 lines
1.9 KiB
YAML
76 lines
1.9 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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$id: http://devicetree.org/schemas/nvmem/u-boot,env.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: U-Boot environment variables
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description: |
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U-Boot uses environment variables to store device parameters and
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configuration. They may be used for booting process, setup or keeping end user
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info.
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Data is stored using U-Boot specific formats (variant specific header and NUL
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separated key-value pairs).
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Environment data can be stored on various storage entities, e.g.:
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1. Raw flash partition
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2. UBI volume
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This binding allows marking storage device (as containing env data) and
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specifying used format.
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Right now only flash partition case is covered but it may be extended to e.g.
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UBI volumes in the future.
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Variables can be defined as NVMEM device subnodes.
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maintainers:
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- Rafał Miłecki <rafal@milecki.pl>
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properties:
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compatible:
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oneOf:
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- description: A standalone env data block
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const: u-boot,env
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- description: Two redundant blocks with active one flagged
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const: u-boot,env-redundant-bool
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- description: Two redundant blocks with active having higher counter
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const: u-boot,env-redundant-count
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reg:
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maxItems: 1
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bootcmd:
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type: object
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description: Command to use for automatic booting
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ethaddr:
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type: object
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description: Ethernet interface's MAC address
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additionalProperties: 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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reg = <0x0 0x40000>;
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label = "u-boot";
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read-only;
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};
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env: partition@40000 {
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compatible = "u-boot,env";
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reg = <0x40000 0x10000>;
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mac: ethaddr {
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};
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};
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};
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