bindings/nvmem/u-boot%2Cenv.yaml

1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
4 $id: http://devicetree.org/schemas/nvmem/u-boot,env.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: U-Boot environment variables
10   U-Boot uses environment variables to store device parameters and
14   Data is stored using U-Boot specific formats (variant specific header and NUL
15   separated key-value pairs).
18   1. Raw flash partition
21   This binding allows marking storage device (as containing env data) and
24   Right now only flash partition case is covered but it may be extended to e.g.
30   - Rafał Miłecki <rafal@milecki.pl>
35       - description: A standalone env data block
36         const: u-boot,env
37       - description: Two redundant blocks with active one flagged
38         const: u-boot,env-redundant-bool
39       - description: Two redundant blocks with active having higher counter
40         const: u-boot,env-redundant-count
41       - description: Broadcom's variant with custom header
42         const: brcm,env
57       "#nvmem-cell-cells":
64   - |
66         compatible = "fixed-partitions";
67         #address-cells = <1>;
68         #size-cells = <1>;
70         partition@0 {
72             label = "u-boot";
73             read-only;
76         env: partition@40000 {
77             compatible = "u-boot,env";
81                 #nvmem-cell-cells = <1>;
85   - |
87         compatible = "fixed-partitions";
88         #address-cells = <1>;
89         #size-cells = <1>;
91         partition@0 {
93             compatible = "brcm,u-boot";
94             label = "u-boot";
96             partition-u-boot-env {
97                 compatible = "brcm,env";