xref: /linux/Documentation/devicetree/bindings/ufs/ufs-common.yaml (revision a1c613ae4c322ddd58d5a8539dbfba2a0380a8c0) 
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
7title: Common properties for Universal Flash Storage (UFS) Host Controllers
8
9maintainers:
10  - Alim Akhtar <alim.akhtar@samsung.com>
11  - Avri Altman <avri.altman@wdc.com>
12
13properties:
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    description: |
24      Array of <min max> operating frequencies in Hz stored in the same order
25      as the clocks property. If this property is not defined or a value in the
26      array is "0" then it is assumed that the frequency is set by the parent
27      clock or a fixed rate clock source.
28
29  interrupts:
30    maxItems: 1
31
32  lanes-per-direction:
33    $ref: /schemas/types.yaml#/definitions/uint32
34    enum: [1, 2]
35    default: 2
36    description:
37      Number of lanes available per direction.  Note that it is assume same
38      number of lanes is used both directions at once.
39
40  vdd-hba-supply:
41    description:
42      Phandle to UFS host controller supply regulator node.
43
44  vcc-supply:
45    description:
46      Phandle to VCC supply regulator node.
47
48  vccq-supply:
49    description:
50      Phandle to VCCQ supply regulator node.
51
52  vccq2-supply:
53    description:
54      Phandle to VCCQ2 supply regulator node.
55
56  vcc-supply-1p8:
57    type: boolean
58    description:
59      For embedded UFS devices, valid VCC range is 1.7-1.95V or 2.7-3.6V. This
60      boolean property when set, specifies to use low voltage range of
61      1.7-1.95V. Note for external UFS cards this property is invalid and valid
62      VCC range is always 2.7-3.6V.
63
64  vcc-max-microamp:
65    description:
66      Specifies max. load that can be drawn from VCC supply.
67
68  vccq-max-microamp:
69    description:
70      Specifies max. load that can be drawn from VCCQ supply.
71
72  vccq2-max-microamp:
73    description:
74      Specifies max. load that can be drawn from VCCQ2 supply.
75
76dependencies:
77  freq-table-hz: [ clocks ]
78
79required:
80  - interrupts
81
82additionalProperties: true
83