1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
4 $id: http://devicetree.org/schemas/ufs/ufs-common.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Common properties for Universal Flash Storage (UFS) Host Controllers
10 - Alim Akhtar <alim.akhtar@samsung.com>
11 - Avri Altman <avri.altman@wdc.com>
21 - description: Minimum frequency for given clock in Hz
22 - description: Maximum frequency for given clock in Hz
25 Preferred is operating-points-v2.
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.
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
47 $ref: /schemas/types.yaml#/definitions/uint32
51 Number of lanes available per direction. Note that it is assume same
52 number of lanes is used both directions at once.
56 Phandle to UFS host controller supply regulator node.
60 Phandle to VCC supply regulator node.
64 Phandle to VCCQ supply regulator node.
68 Phandle to VCCQ2 supply regulator node.
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.
80 Specifies max. load that can be drawn from VCC supply.
84 Specifies max. load that can be drawn from VCCQ supply.
88 Specifies max. load that can be drawn from VCCQ2 supply.
93 freq-table-hz: [ clocks ]
94 operating-points-v2: [ clocks, clock-names ]
105 operating-points-v2: false
108 - operating-points-v2
113 additionalProperties: true