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linux-7.2.3/Documentation/devicetree/bindings/nvmem/layouts/fixed-cell.yaml

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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/nvmem/layouts/fixed-cell.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Fixed offset & size NVMEM cell
+
+maintainers:
+  - Rafał Miłecki <rafal@milecki.pl>
+  - Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+
+properties:
+  compatible:
+    oneOf:
+      - const: mac-base
+        description: >
+          Cell with base MAC address to be used for calculating extra relative
+          addresses.
+          It can be stored in a plain binary format (cell length 6) or as an
+          ASCII text like "00:11:22:33:44:55" (cell length 17).
+
+  reg:
+    maxItems: 1
+
+  bits:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    items:
+      - minimum: 0
+        maximum: 31
+        description:
+          Offset in bit within the address range specified by reg.
+      - minimum: 1
+        description:
+          Size in bit within the address range specified by reg.
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: mac-base
+      required: [ compatible ]
+    then:
+      properties:
+        "#nvmem-cell-cells":
+          description: The first argument is a MAC address offset.
+          const: 1
+      required:
+        - "#nvmem-cell-cells"
+
+required:
+  - reg
+
+additionalProperties: true

linux-7.2.3/Documentation/devicetree/bindings/nvmem/layouts/fixed-layout.yaml

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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/nvmem/layouts/fixed-layout.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NVMEM layout for fixed NVMEM cells
+
+description:
+  Many NVMEM devices have hardcoded cells layout (offset and size of defined
+  NVMEM content doesn't change).
+
+  This binding allows defining such NVMEM layout with its cells. It can be used
+  on top of any NVMEM device.
+
+maintainers:
+  - Rafał Miłecki <rafal@milecki.pl>
+
+properties:
+  compatible:
+    const: fixed-layout
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 1
+
+patternProperties:
+  "@[a-f0-9]+(,[0-7])?$":
+    type: object
+    $ref: fixed-cell.yaml
+    unevaluatedProperties: false
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+    nvmem-layout {
+        compatible = "fixed-layout";
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        mac@100 {
+            compatible = "mac-base";
+            reg = <0x100 0x6>;
+            #nvmem-cell-cells = <1>;
+        };
+
+        mac@110 {
+            compatible = "mac-base";
+            reg = <0x110 0x11>;
+            #nvmem-cell-cells = <1>;
+        };
+
+        calibration@4000 {
+            reg = <0x4000 0x100>;
+        };
+    };

linux-7.2.3/Documentation/devicetree/bindings/nvmem/layouts/kontron,sl28-vpd.yaml

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+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/nvmem/layouts/kontron,sl28-vpd.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NVMEM layout of the Kontron SMARC-sAL28 vital product data
+
+maintainers:
+  - Michael Walle <michael@walle.cc>
+
+description:
+  The vital product data (VPD) of the sl28 boards contains a serial
+  number and a base MAC address. The actual MAC addresses for the
+  on-board ethernet devices are derived from this base MAC address by
+  adding an offset.
+
+select: false
+
+properties:
+  compatible:
+    const: kontron,sl28-vpd
+
+  serial-number:
+    type: object
+    description: The board's serial number
+
+    additionalProperties: false
+
+  base-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
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+      otp-1 {
+          compatible = "user-otp";
+
+          nvmem-layout {
+              compatible = "kontron,sl28-vpd";
+
+              serial_number: serial-number {
+              };
+
+              base_mac_address: base-mac-address {
+                  #nvmem-cell-cells = <1>;
+              };
+          };
+      };
+
+...

linux-7.2.3/Documentation/devicetree/bindings/nvmem/layouts/nvmem-layout.yaml

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+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/nvmem/layouts/nvmem-layout.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NVMEM (Non Volatile Memory) layouts
+
+maintainers:
+  - Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+  - Michael Walle <michael@walle.cc>
+  - Miquel Raynal <miquel.raynal@bootlin.com>
+
+description: |
+  Most NVMEM layouts are static and thus do not require additional description
+  besides the bytes/bits offset and length. Other layouts can be less statically
+  define and might require dynamic reading of the NVMEM device in order to
+  perform their parsing. The nvmem-layout container is here to describe these.
+
+oneOf:
+  - $ref: fixed-layout.yaml
+  - $ref: kontron,sl28-vpd.yaml
+  - $ref: onie,tlv-layout.yaml
+  - $ref: u-boot,env.yaml
+
+properties:
+  compatible: true
+
+required:
+  - compatible
+
+unevaluatedProperties: false

linux-7.2.3/Documentation/devicetree/bindings/nvmem/layouts/onie,tlv-layout.yaml

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+# 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@bootlin.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 underlying 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.
+
+select: false
+
+properties:
+  compatible:
+    const: onie,tlv-layout
+
+  product-name:
+    type: object
+    additionalProperties: false
+
+  part-number:
+    type: object
+    additionalProperties: false
+
+  serial-number:
+    type: object
+    additionalProperties: false
+
+  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:
+    type: object
+    additionalProperties: false
+
+  device-version:
+    type: object
+    additionalProperties: false
+
+  label-revision:
+    type: object
+    additionalProperties: false
+
+  platform-name:
+    type: object
+    additionalProperties: false
+
+  onie-version:
+    type: object
+    additionalProperties: false
+
+  num-macs:
+    type: object
+    additionalProperties: false
+
+  manufacturer:
+    type: object
+    additionalProperties: false
+
+  country-code:
+    type: object
+    additionalProperties: false
+
+  vendor:
+    type: object
+    additionalProperties: false
+
+  diag-version:
+    type: object
+    additionalProperties: false
+
+  service-tag:
+    type: object
+    additionalProperties: false
+
+  vendor-extension:
+    type: object
+    additionalProperties: false
+
+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>;
+                    };
+                };
+            };
+        };
+    };
+...

linux-7.2.3/Documentation/devicetree/bindings/nvmem/layouts/u-boot,env.yaml

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+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/nvmem/layouts/u-boot,env.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: U-Boot environment variables layout
+
+description: |
+  U-Boot uses environment variables to store device parameters and
+  configuration. They may be used for booting process, setup or keeping end user
+  info.
+
+  Data is stored using U-Boot specific formats (variant specific header and NUL
+  separated key-value pairs).
+
+  Environment data can be stored on various storage entities, e.g.:
+  1. Raw flash partition
+  2. UBI volume
+
+  This binding allows marking storage device (as containing env data) and
+  specifying used format.
+
+  Variables can be defined as NVMEM device subnodes.
+
+maintainers:
+  - Rafał Miłecki <rafal@milecki.pl>
+
+properties:
+  compatible:
+    oneOf:
+      - description: A standalone env data block
+        const: u-boot,env
+      - description: Two redundant blocks with active one flagged
+        const: u-boot,env-redundant-bool
+      - description: Two redundant blocks with active having higher counter
+        const: u-boot,env-redundant-count
+      - description: Broadcom's variant with custom header
+        const: brcm,env
+
+  reg:
+    description: Partition offset and size for env on top of MTD
+    maxItems: 1
+
+  bootcmd:
+    type: object
+    description: Command to use for automatic booting
+
+  env-size:
+    description:
+      Size in bytes of the environment data used by U-Boot for CRC
+      calculation. If omitted, the full NVMEM region size is used.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  ethaddr:
+    type: object
+    description: Ethernet interfaces base MAC address.
+    additionalProperties: false
+
+    properties:
+      "#nvmem-cell-cells":
+        description: The first argument is a MAC address offset.
+        const: 1
+
+allOf:
+  - if:
+      properties:
+        $nodename:
+          not:
+            contains:
+              pattern: "^partition@[0-9a-f]+$"
+    then:
+      properties:
+        reg: false
+
+additionalProperties: false
+
+examples:
+  - |
+    partitions {
+        compatible = "fixed-partitions";
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        partition@0 {
+            reg = <0x0 0x40000>;
+            label = "u-boot";
+            read-only;
+        };
+
+        env: partition@40000 {
+            compatible = "u-boot,env";
+            reg = <0x40000 0x10000>;
+
+            mac: ethaddr {
+                #nvmem-cell-cells = <1>;
+            };
+        };
+    };
+  - |
+    partitions {
+        compatible = "fixed-partitions";
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        partition@0 {
+            reg = <0x0 0x100000>;
+            compatible = "brcm,u-boot";
+            label = "u-boot";
+
+            partition-u-boot-env {
+                compatible = "brcm,env";
+                env-size = <0x20000>;
+
+                ethaddr {
+                };
+            };
+        };
+    };
+  - |
+    partition@0 {
+        reg = <0x0 0x100000>;
+        label = "ubi";
+        compatible = "linux,ubi";
+
+        volumes {
+            ubi-volume-u-boot-env {
+                volname = "env";
+
+                nvmem-layout {
+                    compatible = "u-boot,env";
+
+                    ethaddr {
+                        #nvmem-cell-cells = <1>;
+                    };
+                };
+            };
+        };
+    };