Commit 27bfb201 authored by Rafał Miłecki's avatar Rafał Miłecki Committed by Miquel Raynal
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dt-bindings: mtd: partitions: add binding for U-Boot bootloader 



Right now there is no (known) real reason for a custom binding for
standard U-Boot partitions. Broadcom's U-Boot however requires extra
handling - looking for environment variables subblocks. This commit adds
Broadcom specific binding.

Signed-off-by: default avatarRafał Miłecki <rafal@milecki.pl>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarMiquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220711153041.6036-1-zajec5@gmail.com
parent 568035b0

Documentation/devicetree/bindings/mtd/partitions/u-boot.yaml

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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause

%YAML 1.2

---

$id: http://devicetree.org/schemas/mtd/partitions/u-boot.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#



title: U-Boot bootloader partition



description: |

  U-Boot is a bootlodaer commonly used in embedded devices. It's almost always

  located on some kind of flash device.



  Device configuration is stored as a set of environment variables that are

  located in a (usually standalone) block of data.



maintainers:

  - Rafał Miłecki <rafal@milecki.pl>



allOf:

  - $ref: partition.yaml#



properties:

  compatible:

    oneOf:

      - const: brcm,u-boot

        description: |

          Broadcom stores environment variables inside a U-Boot partition. They

          can be identified by a custom header with magic value.



unevaluatedProperties: false



examples:

  - |

    partitions {

        compatible = "fixed-partitions";

        #address-cells = <1>;

        #size-cells = <1>;



        partition@0 {

            compatible = "brcm,u-boot";

            reg = <0x0 0x100000>;

            label = "u-boot";

        };



        partition@100000 {

            reg = <0x100000 0x1ff00000>;

            label = "firmware";

        };

    };