dt-bindings: tpm: Convert IBM vTPM bindings to DT schema

* Device Tree Bindings for IBM Virtual Trusted Platform Module(vtpm)

Required properties:

- compatible            : property name that conveys the platform architecture

                          identifiers, as 'IBM,vtpm'

- device_type           : specifies type of virtual device

- interrupts            : property specifying the interrupt source number and

                          sense code associated with this virtual I/O Adapters

- ibm,my-drc-index      : integer index for the connector between the device

                          and its parent - present only if Dynamic

                          Reconfiguration(DR) Connector is enabled

- ibm,#dma-address-cells: specifies the number of cells that are used to

                          encode the physical address field of dma-window

                          properties

- ibm,#dma-size-cells   : specifies the number of cells that are used to

                          encode the size field of dma-window properties

- ibm,my-dma-window     : specifies DMA window associated with this virtual

                          IOA

- ibm,loc-code          : specifies the unique and persistent location code

                          associated with this virtual I/O Adapters

- linux,sml-base        : 64-bit base address of the reserved memory allocated

                          for the firmware event log

- linux,sml-size        : size of the memory allocated for the firmware event log

Example (IBM Virtual Trusted Platform Module)

---------------------------------------------

                vtpm@30000003 {

                        ibm,#dma-size-cells = <0x2>;

                        compatible = "IBM,vtpm";

                        device_type = "IBM,vtpm";

                        ibm,my-drc-index = <0x30000003>;

                        ibm,#dma-address-cells = <0x2>;

                        linux,sml-base = <0xc60e 0x0>;

                        interrupts = <0xa0003 0x0>;

                        ibm,my-dma-window = <0x10000003 0x0 0x0 0x0 0x10000000>;

                        ibm,loc-code = "U8286.41A.10082DV-V3-C3";

                        reg = <0x30000003>;

                        linux,sml-size = <0xbce10200>;

                };

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/tpm/ibm,vtpm.yaml#

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

title: IBM Virtual Trusted Platform Module (vTPM)

maintainers:

  - Nayna Jain <nayna@linux.ibm.com>

description: |

  Virtual TPM is used on IBM POWER7+ and POWER8 systems running POWERVM.

  It is supported through the adjunct partition with firmware release 740

  or higher.  With vTPM support, each lpar is able to have its own vTPM

  without the physical TPM hardware.  The TPM functionality is provided by

  communicating with the vTPM adjunct partition through Hypervisor calls

  (Hcalls) and Command/Response Queue (CRQ) commands.

properties:

  compatible:

    enum:

      - IBM,vtpm

      - IBM,vtpm20

  device_type:

    description:

      type of virtual device

    enum:

      - IBM,vtpm

      - IBM,vtpm20

  reg:

    maxItems: 1

  'ibm,#dma-address-cells':

    description:

      number of cells that are used to encode the physical address field of

      dma-window properties

    $ref: /schemas/types.yaml#/definitions/uint32-array

  'ibm,#dma-size-cells':

    description:

      number of cells that are used to encode the size field of

      dma-window properties

    $ref: /schemas/types.yaml#/definitions/uint32-array

  ibm,my-dma-window:

    description:

      DMA window associated with this virtual I/O Adapter

    $ref: /schemas/types.yaml#/definitions/uint32-array

    minItems: 5

    maxItems: 5

  ibm,my-drc-index:

    description:

      integer index for the connector between the device and its parent;

      present only if Dynamic Reconfiguration (DR) Connector is enabled

    $ref: /schemas/types.yaml#/definitions/uint32

  ibm,loc-code:

    description:

      unique and persistent location code associated with this virtual

      I/O Adapter

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

required:

  - compatible

  - device_type

  - reg

  - interrupts

  - ibm,#dma-address-cells

  - ibm,#dma-size-cells

  - ibm,my-dma-window

  - ibm,my-drc-index

  - ibm,loc-code

  - linux,sml-base

  - linux,sml-size

allOf:

  - $ref: tpm-common.yaml#

unevaluatedProperties: false

examples:

  - |

    soc {

        #address-cells = <1>;

        #size-cells = <0>;

        tpm@30000003 {

            compatible = "IBM,vtpm";

            device_type = "IBM,vtpm";

            reg = <0x30000003>;

            interrupts = <0xa0003 0x0>;

            ibm,#dma-address-cells = <0x2>;

            ibm,#dma-size-cells = <0x2>;

            ibm,my-dma-window = <0x10000003 0x0 0x0 0x0 0x10000000>;

            ibm,my-drc-index = <0x30000003>;

            ibm,loc-code = "U8286.41A.10082DV-V3-C3";

            linux,sml-base = <0xc60e 0x0>;

            linux,sml-size = <0xbce10200>;

        };

    };