Commit f90714e5 authored by Nicolas Saenz Julienne's avatar Nicolas Saenz Julienne Committed by Greg Kroah-Hartman
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dt-bindings: nvmem: Add bindings for rmem driver 



Firmware/co-processors might use reserved memory areas in order to pass
data stemming from an nvmem device otherwise non accessible to Linux.
For example an EEPROM memory only physically accessible to firmware, or
data only accessible early at boot time.

Introduce the dt-bindings to nvmem's rmem.

Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarNicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: default avatarSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20210129171430.11328-4-srinivas.kandagatla@linaro.org


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 579db09c

Documentation/devicetree/bindings/nvmem/rmem.yaml

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/nvmem/rmem.yaml#

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



title: Reserved Memory Based nvmem Device



maintainers:

  - Nicolas Saenz Julienne <nsaenzjulienne@suse.de>



allOf:

  - $ref: "nvmem.yaml#"



properties:

  compatible:

    items:

      - enum:

          - raspberrypi,bootloader-config

      - const: nvmem-rmem



  no-map:

    $ref: /schemas/types.yaml#/definitions/flag

    description:

      Avoid creating a virtual mapping of the region as part of the OS'

      standard mapping of system memory.



required:

  - compatible

  - no-map



unevaluatedProperties: false



examples:

  - |

        reserved-memory {

                #address-cells = <1>;

                #size-cells = <1>;



                blconfig: nvram@10000000 {

                        compatible = "raspberrypi,bootloader-config", "nvmem-rmem";

                        #address-cells = <1>;

                        #size-cells = <1>;

                        reg = <0x10000000 0x1000>;

                        no-map;

                };

        };



...