Documents the device tree bindings for `bootcount-nvmem` driver. Signed-off-by: Nandor Han <nandor.han@xxxxxxxxxxx> --- .../bindings/nvmem/bootcount-nvmem.yaml | 71 +++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 Documentation/devicetree/bindings/nvmem/bootcount-nvmem.yaml diff --git a/Documentation/devicetree/bindings/nvmem/bootcount-nvmem.yaml b/Documentation/devicetree/bindings/nvmem/bootcount-nvmem.yaml new file mode 100644 index 000000000000..1200ef906843 --- /dev/null +++ b/Documentation/devicetree/bindings/nvmem/bootcount-nvmem.yaml @@ -0,0 +1,71 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +# Copyright (c) Vaisala Oyj. All rights reserved. +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/nvmem/bootcount-nvmem.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Bootcount NVMEM bindings + +maintainers: + - Nandor Han <nandor.han@xxxxxxxxxxx> + +description: | + This binding is intendent to describe the hardware location for + storing the bootcount value and magic combo. + + The NVMEM cell size should be 2 or 4 bytes. + +allOf: + - $ref: "nvmem-consumer.yaml#" + +properties: + compatible: + enum: + - linux,bootcount-nvmem + + nvmem-cells: + description: Phandle to reboot mode nvmem data cell. + $ref: /schemas/types.yaml#/definitions/phandle-array + + nvmem-cell-names: + description: Name of the NVMEM cell. + $ref: /schemas/types.yaml#/definitions/string-array + enum: + - bootcount-regs + + linux,bootcount-magic: + description: Override the default magic value. + $ref: /schemas/types.yaml#/definitions/uint32 + +required: + - compatible + - nvmem-cells + - nvmem-cell-names + +additionalProperties: false + +examples: + # example with 16 bit nvram cell: + - | + bootcount { + compatible = "linux,bootcount-nvmem"; + nvmem-cells = <&bootcount_regs>; + nvmem-cell-names = "bootcount-regs"; + }; + + rtc: rtc@68 { + #address-cells = <1>; + #size-cells = <1>; + + reg = <0x68 0x10>; + + bootcount_regs: bootcount_nvmem_regs@e { + #address-cells = <1>; + #size-cells = <1>; + + reg = <0x0e 0x2>; + }; + }; + +... -- 2.26.3
