linux-kernel - Re: [PATCH v3 6/6] dt-bindings: nvmem: add YAML schema for the ONIE tlv layout

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Date:   Wed, 9 Nov 2022 22:00:55 -0600
From:   Rob Herring <robh@...nel.org>
To:     Miquel Raynal <miquel.raynal@...tlin.com>
Cc:     Krzysztof Kozlowski <krzk+dt@...nel.org>,
        devicetree@...r.kernel.org,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        linux-kernel@...r.kernel.org,
        Robert Marko <robert.marko@...tura.hr>,
        Luka Perkov <luka.perkov@...tura.hr>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Michael Walle <michael@...le.cc>,
        linux-arm-kernel@...ts.infradead.org,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Christian Eggers <ceggers@...i.de>,
        Cory Tusar <cory.tusar@...1solutions.com>
Subject: Re: [PATCH v3 6/6] dt-bindings: nvmem: add YAML schema for the ONIE
 tlv layout

On Fri, Nov 04, 2022 at 05:38:33PM +0100, Miquel Raynal wrote:
> Add a schema for the ONIE tlv NVMEM layout that can be found on any ONIE
> compatible networking device.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
> ---
>  .../bindings/nvmem/layouts/nvmem-layout.yaml  |   1 +
>  .../nvmem/layouts/onie,tlv-layout.yaml        | 115 ++++++++++++++++++
>  2 files changed, 116 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/nvmem/layouts/onie,tlv-layout.yaml
> 
> diff --git a/Documentation/devicetree/bindings/nvmem/layouts/nvmem-layout.yaml b/Documentation/devicetree/bindings/nvmem/layouts/nvmem-layout.yaml
> index f64ea2fa362d..8512ee538c4c 100644
> --- a/Documentation/devicetree/bindings/nvmem/layouts/nvmem-layout.yaml
> +++ b/Documentation/devicetree/bindings/nvmem/layouts/nvmem-layout.yaml
> @@ -19,6 +19,7 @@ description: |
>  
>  oneOf:
>    - $ref: kontron,sl28-vpd.yaml
> +  - $ref: onie,tlv-layout.yaml
>  
>  properties:
>    compatible: true
> diff --git a/Documentation/devicetree/bindings/nvmem/layouts/onie,tlv-layout.yaml b/Documentation/devicetree/bindings/nvmem/layouts/onie,tlv-layout.yaml
> new file mode 100644
> index 000000000000..1d91277324ac
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/nvmem/layouts/onie,tlv-layout.yaml
> @@ -0,0 +1,115 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/nvmem/layouts/onie,tlv-layout.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: NVMEM layout of the ONIE tlv table
> +
> +maintainers:
> +  - Miquel Raynal <miquel.raynal@...tlin.com>
> +
> +description:
> +  Modern networking hardware implementing the Open Compute Project ONIE
> +  infrastructure shall provide a non-volatile memory with a table whose the
> +  content is well specified and gives many information about the manufacturer
> +  (name, country of manufacture, etc) as well as device caracteristics (serial
> +  number, hardware version, mac addresses, etc). The underlaying device type
> +  (flash, EEPROM,...) is not specified. The exact location of each value is also
> +  dynamic and should be discovered at run time because it depends on the
> +  parameters the manufacturer decided to embed.
> +
> +properties:
> +  compatible:
> +    const: onie,tlv-layout
> +
> +  product-name: true

This is a node? If so, you need:

type: object
additionalProperties: false

> +
> +  part-number: true
> +
> +  serial-number: true
> +
> +  mac-address:
> +    type: object
> +    description:
> +      Base MAC address for all on-module network interfaces. The first
> +      argument of the phandle will be treated as an offset.
> +
> +    properties:
> +      "#nvmem-cell-cells":
> +        const: 1
> +
> +    additionalProperties: false
> +
> +  manufacture-date: true
> +
> +  device-version: true
> +
> +  label-revision: true
> +
> +  platforn-name: true
> +
> +  onie-version: true
> +
> +  num-macs: true
> +
> +  manufacturer: true
> +
> +  country-code: true
> +
> +  vendor: true
> +
> +  diag-version: true
> +
> +  service-tag: true
> +
> +  vendor-extension: true
> +
> +required:
> +  - compatible
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    spi {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        eeprom@56 {
> +            compatible = "atmel,24c64";
> +            read-only;
> +            reg = <0x56>;
> +
> +            nvmem-layout {
> +                compatible = "onie,tlv-layout";
> +
> +                serial-number {
> +                };
> +            };
> +        };
> +    };
> +
> +  - |
> +    spi {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        flash@0 {
> +            compatible = "m25p80", "jedec,spi-nor";
> +            reg = <0>;
> +
> +            otp {
> +                compatible = "user-otp";
> +
> +                nvmem-layout {
> +                    compatible = "onie,tlv-layout";
> +
> +                    mac-address {
> +                        #nvmem-cell-cells = <1>;
> +                    };
> +                };
> +            };
> +        };
> +    };
> +...
> -- 
> 2.34.1
> 
>