Bindings/ufs/ufs-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/ufs/ufs-common.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: Common properties for Universal Flash Storage (UFS) Host Controllers
   8
   9 maintainers:
  10   - Alim Akhtar <alim.akhtar@samsung.com>
  11   - Avri Altman <avri.altman@wdc.com>
  12
  13 properties:
  14   clocks: true
  15
  16   clock-names: true
  17
  18   freq-table-hz:
  19     items:
  20       items:
  21         - description: Minimum frequency for given clock in Hz
  22         - description: Maximum frequency for given clock in Hz
  23     deprecated: true
  24     description: |
  25       Preferred is operating-points-v2.
  26
  27       Array of <min max> operating frequencies in Hz stored in the same order
  28       as the clocks property. If either this property or operating-points-v2 is
  29       not defined or a value in the array is "0" then it is assumed that the
  30       frequency is set by the parent clock or a fixed rate clock source.
  31
  32   operating-points-v2:
  33     description:
  34       Preferred over freq-table-hz.
  35       If present, each OPP must contain array of frequencies stored in the same
  36       order for each clock.  If clock frequency in the array is "0" then it is
  37       assumed that the frequency is set by the parent clock or a fixed rate
  38       clock source.
  39
  40   opp-table:
  41     type: object
  42
  43   interrupts:
  44     maxItems: 1
  45
  46   lanes-per-direction:
  47     $ref: /schemas/types.yaml#/definitions/uint32
  48     enum: [1, 2]
  49     default: 2
  50     description:
  51       Number of lanes available per direction.  Note that it is assume same
  52       number of lanes is used both directions at once.
  53
  54   vdd-hba-supply:
  55     description:
  56       Phandle to UFS host controller supply regulator node.
  57
  58   vcc-supply:
  59     description:
  60       Phandle to VCC supply regulator node.
  61
  62   vccq-supply:
  63     description:
  64       Phandle to VCCQ supply regulator node.
  65
  66   vccq2-supply:
  67     description:
  68       Phandle to VCCQ2 supply regulator node.
  69
  70   vcc-supply-1p8:
  71     type: boolean
  72     description:
  73       For embedded UFS devices, valid VCC range is 1.7-1.95V or 2.7-3.6V. This
  74       boolean property when set, specifies to use low voltage range of
  75       1.7-1.95V. Note for external UFS cards this property is invalid and valid
  76       VCC range is always 2.7-3.6V.
  77
  78   vcc-max-microamp:
  79     description:
  80       Specifies max. load that can be drawn from VCC supply.
  81
  82   vccq-max-microamp:
  83     description:
  84       Specifies max. load that can be drawn from VCCQ supply.
  85
  86   vccq2-max-microamp:
  87     description:
  88       Specifies max. load that can be drawn from VCCQ2 supply.
  89
  90   msi-parent: true
  91
  92 dependencies:
  93   freq-table-hz: [ clocks ]
  94   operating-points-v2: [ clocks, clock-names ]
  95
  96 required:
  97   - interrupts
  98
  99 allOf:
 100   - if:
 101       required:
 102         - freq-table-hz
 103     then:
 104       properties:
 105         operating-points-v2: false
 106   - if:
 107       required:
 108         - operating-points-v2
 109     then:
 110       properties:
 111         freq-table-hz: false
 112
 113 additionalProperties: true