1# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/nvmem/u-boot,env.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: U-Boot environment variables 8 9description: | 10 U-Boot uses environment variables to store device parameters and 11 configuration. They may be used for booting process, setup or keeping end user 12 info. 13 14 Data is stored using U-Boot specific formats (variant specific header and NUL 15 separated key-value pairs). 16 17 Environment data can be stored on various storage entities, e.g.: 18 1. Raw flash partition 19 2. UBI volume 20 21 This binding allows marking storage device (as containing env data) and 22 specifying used format. 23 24 Right now only flash partition case is covered but it may be extended to e.g. 25 UBI volumes in the future. 26 27maintainers: 28 - Rafał Miłecki <rafal@milecki.pl> 29 30properties: 31 compatible: 32 oneOf: 33 - description: A standalone env data block 34 const: u-boot,env 35 - description: Two redundant blocks with active one flagged 36 const: u-boot,env-redundant-bool 37 - description: Two redundant blocks with active having higher counter 38 const: u-boot,env-redundant-count 39 40 reg: 41 maxItems: 1 42 43additionalProperties: false 44 45examples: 46 - | 47 partitions { 48 compatible = "fixed-partitions"; 49 #address-cells = <1>; 50 #size-cells = <1>; 51 52 partition@0 { 53 reg = <0x0 0x40000>; 54 label = "u-boot"; 55 read-only; 56 }; 57 58 env: partition@40000 { 59 compatible = "u-boot,env"; 60 reg = <0x40000 0x10000>; 61 }; 62 }; 63