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: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220306111125.116455-2-krzysztof.kozlowski@canonical.com

authored by

Krzysztof Kozlowski and committed by

Rob Herring 4 years ago 85440732 a45194b9

+83

2 changed files

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Documentation

devicetree

bindings

ufs

ufs-common.yaml

MAINTAINERS

+82

Documentation/devicetree/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 + 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 + 76 + dependencies: 77 + freq-table-hz: [ 'clocks' ] 78 + 79 + required: 80 + - interrupts 81 + 82 + additionalProperties: true

MAINTAINERS

··· 19773 19773 R: Avri Altman <avri.altman@wdc.com> 19774 19774 L: linux-scsi@vger.kernel.org 19775 19775 S: Supported 19776 + F: Documentation/devicetree/bindings/ufs/ 19776 19777 F: Documentation/scsi/ufs.rst 19777 19778 F: drivers/scsi/ufs/ 19778 19779

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