Commit 85440732 authored by Krzysztof Kozlowski's avatar Krzysztof Kozlowski Committed by Rob Herring
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dt-bindings: ufs: add common platform bindings 



Add bindings for common parts (platform) of Universal Flash Storage
(UFS) Host Controllers in dtschema format.

Include also the bindings directory in the UFS maintainers entry.

Signed-off-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: default avatarAlim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: default avatarRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220306111125.116455-2-krzysztof.kozlowski@canonical.com
parent a45194b9

Documentation/devicetree/bindings/ufs/ufs-common.yaml

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/ufs/ufs-common.yaml#

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



title: Common properties for Universal Flash Storage (UFS) Host Controllers



maintainers:

  - Alim Akhtar <alim.akhtar@samsung.com>

  - Avri Altman <avri.altman@wdc.com>



properties:

  clocks: true



  clock-names: true



  freq-table-hz:

    items:

      items:

        - description: Minimum frequency for given clock in Hz

        - description: Maximum frequency for given clock in Hz

    description: |

      Array of <min max> operating frequencies in Hz stored in the same order

      as the clocks property. If this property is not defined or a value in the

      array is "0" then it is assumed that the frequency is set by the parent

      clock or a fixed rate clock source.



  interrupts:

    maxItems: 1



  lanes-per-direction:

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

    enum: [1, 2]

    default: 2

    description:

      Number of lanes available per direction.  Note that it is assume same

      number of lanes is used both directions at once.



  vdd-hba-supply:

    description:

      Phandle to UFS host controller supply regulator node.



  vcc-supply:

    description:

      Phandle to VCC supply regulator node.



  vccq-supply:

    description:

      Phandle to VCCQ supply regulator node.



  vccq2-supply:

    description:

      Phandle to VCCQ2 supply regulator node.



  vcc-supply-1p8:

    type: boolean

    description:

      For embedded UFS devices, valid VCC range is 1.7-1.95V or 2.7-3.6V. This

      boolean property when set, specifies to use low voltage range of

      1.7-1.95V. Note for external UFS cards this property is invalid and valid

      VCC range is always 2.7-3.6V.



  vcc-max-microamp:

    description:

      Specifies max. load that can be drawn from VCC supply.



  vccq-max-microamp:

    description:

      Specifies max. load that can be drawn from VCCQ supply.



  vccq2-max-microamp:

    description:

      Specifies max. load that can be drawn from VCCQ2 supply.



dependencies:

  freq-table-hz: [ 'clocks' ]



required:

  - interrupts



additionalProperties: true

MAINTAINERS

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Original line number Diff line number Diff line
@@ -19773,6 +19773,7 @@ R: Alim Akhtar <alim.akhtar@samsung.com> 
R:	Avri Altman <avri.altman@wdc.com>

L:	linux-scsi@vger.kernel.org

S:	Supported

F:	Documentation/devicetree/bindings/ufs/

F:	Documentation/scsi/ufs.rst

F:	drivers/scsi/ufs/