xref: /kernel/linux/linux-6.6/Documentation/devicetree/bindings/mfd/stericsson,db8500-prcmu.yaml (revision 62306a36)

# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/mfd/stericsson,db8500-prcmu.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: ST-Ericsson DB8500 PRCMU - Power Reset and Control Management Unit

maintainers:
  - Linus Walleij <linus.walleij@linaro.org>

description:
  The DB8500 Power Reset and Control Management Unit is an XP70 8-bit
  microprocessor that is embedded in the always-on power domain of the
  DB8500 SoCs to manage the low power states, powering up and down parts
  of the silicon, and controlling reset of different IP blocks.

properties:
  $nodename:
    pattern: '^prcmu@[0-9a-f]+$'

  compatible:
    description: The device is compatible both to the device-specific
      compatible "stericsson,db8500-prcmu" and "syscon". The latter
      compatible is needed for the device to be exposed as a system
      controller so that arbitrary registers can be access by
      different operating system components.
    items:
      - const: stericsson,db8500-prcmu
      - const: syscon

  reg:
    items:
      - description: Main PRCMU register area
      - description: PRCMU TCPM register area
      - description: PRCMU TCDM register area

  reg-names:
    items:
      - const: prcmu
      - const: prcmu-tcpm
      - const: prcmu-tcdm

  interrupts:
    maxItems: 1

  '#address-cells':
    const: 1

  '#size-cells':
    const: 1

  ranges: true

  interrupt-controller: true

  '#interrupt-cells':
    const: 2

  db8500-prcmu-regulators:
    description: Node describing the DB8500 regulators. These are mainly
      power rails inside the silicon but some of those are also routed
      out to external pins.
    type: object

    properties:
      compatible:
        const: stericsson,db8500-prcmu-regulator

      db8500_vape:
        description: The voltage for the application processor, the
          main voltage domain for the chip.
        type: object
        $ref: ../regulator/regulator.yaml#
        unevaluatedProperties: false

      db8500_varm:
        description: The voltage for the ARM Cortex A-9 CPU.
        type: object
        $ref: ../regulator/regulator.yaml#
        unevaluatedProperties: false

      db8500_vmodem:
        description: The voltage for the modem subsystem.
        type: object
        $ref: ../regulator/regulator.yaml#
        unevaluatedProperties: false

      db8500_vpll:
        description: The voltage for the phase locked loop clocks.
        type: object
        $ref: ../regulator/regulator.yaml#
        unevaluatedProperties: false

      db8500_vsmps1:
        description: Also known as VIO12, is a step-down voltage regulator
          for 1.2V I/O. SMPS means System Management Power Source.
        type: object
        $ref: ../regulator/regulator.yaml#
        unevaluatedProperties: false

      db8500_vsmps2:
        description: Also known as VIO18, is a step-down voltage regulator
          for 1.8V I/O. SMPS means System Management Power Source.
        type: object
        $ref: ../regulator/regulator.yaml#
        unevaluatedProperties: false

      db8500_vsmps3:
        description: This is a step-down voltage regulator
          for 0.87 thru 1.875V I/O. SMPS means System Management Power Source.
        type: object
        $ref: ../regulator/regulator.yaml#
        unevaluatedProperties: false

      db8500_vrf1:
        description: RF transceiver voltage regulator.
        type: object
        $ref: ../regulator/regulator.yaml#
        unevaluatedProperties: false

      db8500_sva_mmdsp:
        description: Smart Video Accelerator (SVA) multimedia DSP (MMDSP)
          voltage regulator. This is the voltage for the accelerator DSP
          for video encoding and decoding.
        type: object
        $ref: ../regulator/regulator.yaml#
        unevaluatedProperties: false

      db8500_sva_mmdsp_ret:
        description: Smart Video Accelerator (SVA) multimedia DSP (MMDSP)
          voltage regulator for retention mode.
        type: object
        $ref: ../regulator/regulator.yaml#
        unevaluatedProperties: false

      db8500_sva_pipe:
        description: Smart Video Accelerator (SVA) multimedia DSP (MMDSP)
          voltage regulator for the data pipe.
        type: object
        $ref: ../regulator/regulator.yaml#
        unevaluatedProperties: false

      db8500_sia_mmdsp:
        description: Smart Image Accelerator (SIA) multimedia DSP (MMDSP)
          voltage regulator. This is the voltage for the accelerator DSP
          for image encoding and decoding.
        type: object
        $ref: ../regulator/regulator.yaml#
        unevaluatedProperties: false

      db8500_sia_mmdsp_ret:
        description: Smart Image Accelerator (SIA) multimedia DSP (MMDSP)
          voltage regulator for retention mode.
        type: object
        $ref: ../regulator/regulator.yaml#
        unevaluatedProperties: false

      db8500_sia_pipe:
        description: Smart Image Accelerator (SIA) multimedia DSP (MMDSP)
          voltage regulator for the data pipe.
        type: object
        $ref: ../regulator/regulator.yaml#
        unevaluatedProperties: false

      db8500_sga:
        description: Smart Graphics Accelerator (SGA) voltage regulator.
          This is in effect controlling the power to the MALI400 3D
          accelerator block.
        type: object
        $ref: ../regulator/regulator.yaml#
        unevaluatedProperties: false

      db8500_b2r2_mcde:
        description: Blit Blend Rotate and Rescale (B2R2), and Multi-Channel
          Display Engine (MCDE) voltage regulator. These are two graphics
          blocks.
        type: object
        $ref: ../regulator/regulator.yaml#
        unevaluatedProperties: false

      db8500_esram12:
        description: Embedded Static RAM (ESRAM) 1 and 2 voltage regulator.
        type: object
        $ref: ../regulator/regulator.yaml#
        unevaluatedProperties: false

      db8500_esram12_ret:
        description: Embedded Static RAM (ESRAM) 1 and 2 voltage regulator for
          retention mode.
        type: object
        $ref: ../regulator/regulator.yaml#
        unevaluatedProperties: false

      db8500_esram34:
        description: Embedded Static RAM (ESRAM) 3 and 4 voltage regulator.
        type: object
        $ref: ../regulator/regulator.yaml#
        unevaluatedProperties: false

      db8500_esram34_ret:
        description: Embedded Static RAM (ESRAM) 3 and 4 voltage regulator for
          retention mode.
        type: object
        $ref: ../regulator/regulator.yaml#
        unevaluatedProperties: false

    required:
      - compatible
      - db8500_vape
      - db8500_varm
      - db8500_vmodem
      - db8500_vpll
      - db8500_vsmps1
      - db8500_vsmps2
      - db8500_vsmps3
      - db8500_vrf1
      - db8500_sva_mmdsp
      - db8500_sva_mmdsp_ret
      - db8500_sva_pipe
      - db8500_sia_mmdsp
      - db8500_sia_mmdsp_ret
      - db8500_sia_pipe
      - db8500_sga
      - db8500_b2r2_mcde
      - db8500_esram12
      - db8500_esram12_ret
      - db8500_esram34
      - db8500_esram34_ret

    additionalProperties: false

patternProperties:
  "^thermal@[0-9a-f]+$":
    description: Node describing the DB8500 thermal control functions.
      This binds to an operating system driver that monitors the
      temperature of the SoC.
    type: object

    properties:
      compatible:
        const: stericsson,db8500-thermal

      reg:
        maxItems: 1

      interrupts:
        items:
          - description: Hotmon low interrupt (falling temperature)
          - description: Hotmon high interrupt (rising temperature)

      interrupt-names:
        items:
          - const: IRQ_HOTMON_LOW
          - const: IRQ_HOTMON_HIGH

      '#thermal-sensor-cells':
        const: 0

    additionalProperties: false

  "^prcmu-timer-4@[0-9a-f]+$":
    description: Node describing the externally visible timer 4 in the
      PRCMU block. This timer is interesting to the operating system
      since even thought it has a very low resolution (32768 Hz) it is
      always on, and thus provides a consistent monotonic timeline for
      the system.
    type: object

    properties:
      compatible:
        const: stericsson,db8500-prcmu-timer-4

      reg:
        maxItems: 1

    additionalProperties: false

  "^ab850[05]$":
    description: Node describing the Analog Baseband 8500 mixed-signals
      ASIC AB8500 and subcomponents. The AB8500 is accessed through the
      PRCMU and hence it appears here. This component has a separate
      set of devicetree bindings. The AB8505 is a newer version of the
      same ASIC.
    type: object
    $ref: stericsson,ab8500.yaml#

required:
  - compatible
  - reg
  - '#address-cells'
  - '#size-cells'
  - ranges
  - interrupts
  - interrupt-controller
  - '#interrupt-cells'
  - db8500-prcmu-regulators

additionalProperties: false