# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/mtd/partitions/linux,ubi.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Unsorted Block Images

description: |
  UBI ("Unsorted Block Images") is a volume management system for raw
  flash devices which manages multiple logical volumes on a single
  physical flash device and spreads the I/O load (i.e wear-leveling)
  across the whole flash chip.

maintainers:
  - Daniel Golle <daniel@makrotopia.org>

allOf:
  - $ref: partition.yaml#

properties:
  compatible:
    const: linux,ubi

  volumes:
    type: object
    description: UBI Volumes

    patternProperties:
      "^ubi-volume-.*$":
        $ref: /schemas/mtd/partitions/ubi-volume.yaml#

    unevaluatedProperties: false

required:
  - compatible

unevaluatedProperties: false

examples:
  - |
    partitions {
        compatible = "fixed-partitions";
        #address-cells = <1>;
        #size-cells = <1>;

        partition@0 {
            reg = <0x0 0x100000>;
            label = "bootloader";
            read-only;
        };

        partition@100000 {
            reg = <0x100000 0x1ff00000>;
            label = "ubi";
            compatible = "linux,ubi";

            volumes {
                ubi-volume-caldata {
                    volid = <2>;
                    volname = "rf";

                    nvmem-layout {
                        compatible = "fixed-layout";
                        #address-cells = <1>;
                        #size-cells = <1>;

                        eeprom@0 {
                            reg = <0x0 0x1000>;
                        };
                    };
                };
            };
        };
    };