Bindings/tpm/tpm-common.yaml

   1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/tpm/tpm-common.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: Trusted Platform Module common properties
   8
   9 maintainers:
  10   - Lukas Wunner <lukas@wunner.de>
  11
  12 properties:
  13   $nodename:
  14     pattern: '^tpm(@[0-9a-f]+)?$'
  15
  16   interrupts:
  17     description: indicates command completion
  18     maxItems: 1
  19
  20   label:
  21     description: human readable string describing the device, e.g. "tpm"
  22
  23   linux,sml-base:
  24     description:
  25       base address of reserved memory allocated for firmware event log
  26     $ref: /schemas/types.yaml#/definitions/uint64
  27
  28   linux,sml-size:
  29     description:
  30       size of reserved memory allocated for firmware event log
  31     $ref: /schemas/types.yaml#/definitions/uint32
  32
  33   memory-region:
  34     description: reserved memory allocated for firmware event log
  35     maxItems: 1
  36
  37   powered-while-suspended:
  38     description:
  39       present when the TPM is left powered on between suspend and resume
  40       (makes the suspend/resume callbacks do nothing)
  41     type: boolean
  42
  43   resets:
  44     description: Reset controller to reset the TPM
  45     maxItems: 1
  46
  47   reset-gpios:
  48     description: Output GPIO pin to reset the TPM
  49     maxItems: 1
  50
  51 # must always have both linux,sml-base and linux,sml-size
  52 dependentRequired:
  53   linux,sml-base: ['linux,sml-size']
  54   linux,sml-size: ['linux,sml-base']
  55
  56 # must only have either memory-region or linux,sml-base
  57 # as well as either resets or reset-gpios
  58 dependentSchemas:
  59   memory-region:
  60     properties:
  61       linux,sml-base: false
  62   linux,sml-base:
  63     properties:
  64       memory-region: false
  65   resets:
  66     properties:
  67       reset-gpios: false
  68   reset-gpios:
  69     properties:
  70       resets: false
  71
  72 allOf:
  73   - if:
  74       properties:
  75         compatible:
  76           contains:
  77             pattern: '^st,st33zp24'
  78     then:
  79       properties:
  80         lpcpd-gpios:
  81           description:
  82             Output GPIO pin used for ST33ZP24 power management of D1/D2 state.
  83             If set, power must be present when the platform is going into
  84             sleep/hibernate mode.
  85           maxItems: 1
  86
  87 additionalProperties: true