dt-bindings: rpm-smd-regulator: Add bindings for rpm-smd regulator
Add DT Bindings for rpm-smd regulator driver. Change-Id: I304c932cbf69799bd056ad3adaf00f4576d299f4 Signed-off-by: Ayyagari Ushasreevalli <quic_aushasre@quicinc.com> Signed-off-by: Umang Chheda <quic_uchheda@quicinc.com>
This commit is contained in:
Ayyagari Ushasreevalli
committed by
Umang Chheda
Umang Chheda
parent
a3778b776d
commit
ae5340a388
548
bindings/regulator/rpm-smd-regulator.yaml
Normal file
548
bindings/regulator/rpm-smd-regulator.yaml
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/regulator/rpm-smd-regulator.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Qualcomm Technologies, Inc. RPM Regulators
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maintainers:
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- David Collins <quic_collinsd@quicinc.com>
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- Kamal Wadhwa <quic_kamalw@quicinc.com>
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- Jishnu Prakash <quic_jprakash@quicinc.com>
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description: |
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rpm-regulator-smd is a regulator driver which supports regulators inside of
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PMICs which are controlled by the RPM processor. Communication with the RPM
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processor takes place over SMD.
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Required Node Structure:
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RPM regulators must be described in two levels of devices nodes. The first
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level describes the interface with the RPM. The second level describes
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properties of one regulator framework interface (of potentially many) to
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the regulator.
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properties:
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compatible:
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const: qcom,rpm-smd-regulator-resource
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qcom,resource-name:
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description: |
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Resource name string for this regulator to be used in RPM
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transactions. Length is 4 characters max.
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$ref: /schemas/types.yaml#/definitions/string
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qcom,resource-id:
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description: |
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Resource instance ID for this regulator to be used in RPM
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transactions.
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$ref: /schemas/types.yaml#/definitions/uint32
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qcom,regulator-type:
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description: |
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Type of this regulator. Supported values are 0 = LDO, 1 = SMPS
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2 = VS, 3 = NCP, 4 = Buck or Boost (BoB)
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$ref: /schemas/types.yaml#/definitions/uint32
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minimum: 0
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maximum: 4
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qcom,allow-atomic:
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description: |
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Boolean flag specifying if atomic access is allowed for this
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regulator.
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$ref: /schemas/types.yaml#/definitions/flag
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qcom,enable-time:
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description:
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Time in us to delay after enabling the regulator
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$ref: /schemas/types.yaml#/definitions/uint32
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qcom,hpm-min-load:
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description: |
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Load current in uA which corresponds to the minimum load
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which requires the regulator to be in high power mode.
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$ref: /schemas/types.yaml#/definitions/uint32
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qcom,apps-only:
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description: |
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Boolean flag which indicates that the regulator only has
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consumers on the application processor. If this flag
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is specified, then voltage and current updates are
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only sent to the RPM if the regulator is enabled.
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$ref: /schemas/types.yaml#/definitions/flag
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qcom,always-wait-for-ack:
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description: |
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Boolean flag which indicates that the application processor
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must wait for an ACK or a NACK from RPMh for every request
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sent for this regulator including those which are for a
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strictly lower power state.
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$ref: /schemas/types.yaml#/definitions/flag
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qcom,regulator-hw-type:
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description: |
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Specifies the regulator LDO hardware type. This
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property must be specified if "qcom,regulator-type"
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has been specified with a value of 0 (LDO).
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enum:
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- pmic4-ldo
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- pmic5-ldo
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qcom,supported-modes:
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description: |
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A list of integers specifying the PMIC regulator modes
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supported by this regulator. Supported values are
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RPMH_REGULATOR_MODE_* (i.e. 0 to 4). Elements must be
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specified in order from lowest to highest.
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$ref: /schemas/types.yaml#/definitions/uint32-array
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minItems: 1
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maxItems: 5
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items:
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minimum: 0
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maximum: 4
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qcom,mode-threshold-currents:
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description: |
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A list of integers specifying minimum allowed current in
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microamps for each of the modes listed in qcom,supported-modes.
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The first element should always be 0. Elements must be specified
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in order from lowest to highest.
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$ref: /schemas/types.yaml#/definitions/uint32-array
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minItems: 1
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maxItems: 5
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additionalProperties: false
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required:
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- compatible
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- qcom,resource-name
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- qcom,resource-id
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- qcom,regulator-type
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patternProperties:
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"^regulator.*$":
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type: object
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$ref: regulator.yaml#
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description: regulator client voting interface node(s).
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properties:
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compatible:
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const: qcom,rpm-smd-regulator
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regulator-name:
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description: A string used as a descriptive name for regulator output
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regulator-min-microvolt:
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description: |
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For VRM resources, this is the minimum supported voltage in
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microvolts. For ARC resources, this is the minimum
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supported voltage level from RPMH_REGULATOR_LEVEL_*.
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regulator-max-microvolt:
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description: |
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For VRM resources, this is the maximum supported voltage in
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microvolts. For ARC resources, this is the maximum
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supported voltage level from RPMH_REGULATOR_LEVEL_*.
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parent-supply:
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description: |
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phandle to the parent supply/regulator node.
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qcom,set:
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description: |
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Specifies which sets that requests made with this
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regulator interface should be sent to. Regulator
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requests sent in the active set take effect immediately.
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Requests sent in the sleep set take effect when the Apps
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processor transitions into RPM assisted power collapse.
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$ref: /schemas/types.yaml#/definitions/uint32
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minimum: 1
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maximum: 3
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qcom,system-load:
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description: |
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Load in uA present on regulator that is not
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captured by any consumer request.
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$ref: /schemas/types.yaml#/definitions/uint32
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qcom,use-voltage-corner:
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description: |
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Flag that signifies if regulator_set_voltage
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calls should modify the corner parameter instead
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of the voltage parameter. When used, voltages
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specified inside of the regulator framework
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represent corners that have been incremented by
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1. This value shift is necessary to work around
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limitations in the regulator framework which
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treat 0 uV as an error.
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$ref: /schemas/types.yaml#/definitions/flag
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qcom,use-voltage-floor-corner:
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description: |
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Flag that signifies if regulator_set_voltage
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calls should modify the floor corner parameter
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instead of the voltage parameter. When used,
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voltages specified inside of the regulator
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framework represent corners that have been
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incremented by 1. The properties
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qcom,use-voltage-corner and
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qcom,use-voltage-floor-corner are mutually
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exclusive. Only one may be specified for a
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given regulator.
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$ref: /schemas/types.yaml#/definitions/flag
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qcom,use-voltage-level:
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description: |
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Flag that signifies if regulator_set_voltage
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calls should modify the level parameter instead
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of the voltage parameter.
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$ref: /schemas/types.yaml#/definitions/flag
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qcom,use-voltage-floor-level:
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description: |
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Flag that signifies if regulator_set_voltage
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calls should modify the floor level parameter
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instead of the voltage parameter.
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The properties qcom,use-voltage-level and
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qcom,use-voltage-floor-level are mutually
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exclusive. Only one may be specified for a
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given regulator.
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$ref: /schemas/types.yaml#/definitions/flag
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qcom,use-pin-ctrl-voltage1:
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description: |
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Flag which indicates that updates to voltage
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should be sent to the pin control voltage 1
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parameter. Only one pin may be specified per
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regulator. This property only applies to BoB
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type regulators.
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$ref: /schemas/types.yaml#/definitions/flag
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qcom,use-pin-ctrl-voltage2:
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description: |
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Flag which indicates that updates to voltage
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should be sent to the pin control voltage 2
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parameter. Only one pin may be specified per
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regulator. This property only applies to BoB
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type regulators.
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$ref: /schemas/types.yaml#/definitions/flag
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qcom,use-pin-ctrl-voltage3:
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description: |
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Flag which indicates that updates to voltage
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should be sent to the pin control voltage 3
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parameter. Only one pin may be specified per
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regulator. This property only applies to BoB
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type regulators.
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$ref: /schemas/types.yaml#/definitions/flag
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qcom,always-send-voltage:
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description: |
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Flag which indicates that updates to the
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voltage, voltage corner or voltage level set
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point should always be sent immediately to the
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RPM. If this flag is not specified, then
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voltage set point updates are only sent if the
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given regulator has also been enabled by a
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Linux consumer.
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$ref: /schemas/types.yaml#/definitions/flag
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qcom,always-send-current:
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description: |
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Flag which indicates that updates to the load
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current should always be sent immediately to the
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RPM. If this flag is not specified, then load
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current updates are only sent if the given
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regulator has also been enabled by a Linux
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consumer.
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$ref: /schemas/types.yaml#/definitions/flag
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qcom,send-defaults:
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description: |
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Boolean flag which indicates that the initial
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parameter values should be sent to the RPM
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before consumers make their own requests. If
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this flag is not specified, then initial
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parameters values will only be sent after some
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consumer makes a request.
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$ref: /schemas/types.yaml#/definitions/flag
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qcom,enable-with-pin-ctrl:
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description: |
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Double in which the first element corresponds to
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the pin control enable parameter value to send
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when all consumers have requested the regulator
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to be disabled. The second element corresponds
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to the pin control enable parameter value to
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send when any consumer has requested the
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regulator to be enabled. Each element supports
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the same set of values as the
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qcom,init-pin-ctrl-enable property listed below.
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$ref: /schemas/types.yaml#/definitions/uint32
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qcom,init-enable:
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description: |
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Specifies the initial enable state to request for a VRM
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regulator: 0 = disabled and 1 = enabled.
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$ref: /schemas/types.yaml#/definitions/uint32
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minimum: 0
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maximum: 1
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qcom,init-voltage:
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description: Voltage in uV.
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$ref: /schemas/types.yaml#/definitions/uint32
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qcom,init-current:
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description: Current in mA.
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$ref: /schemas/types.yaml#/definitions/uint32
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qcom,init-ldo-mode:
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description: |
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Operating mode to be used with LDO regulators
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Supported values are 0 = mode determined by current requests
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1 = force HPM (NPM)
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$ref: /schemas/types.yaml#/definitions/uint32
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qcom,init-smps-mode:
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description: |
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Operating mode to be used with SMPS regulators
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Supported values are:
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0 = auto; hardware determines mode
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1 = mode determined by current requests
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2 = force HPM (PWM)
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$ref: /schemas/types.yaml#/definitions/uint32
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qcom,init-bob-mode:
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description: |
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Operating mode to be used with BoB regulators
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Supported values are:
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0 = pass; use priority order
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1 = force PFM
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2 = auto; hardware determines mode
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3 = force PWM
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$ref: /schemas/types.yaml#/definitions/uint32
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qcom,init-pin-ctrl-enable:
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description: |
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Bit mask specifying which hardware pins should be
|
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used to enable the regulator, if any; supported
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bits are:
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0 = ignore all hardware enable signals
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BIT(0) = follow HW0_EN signal
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BIT(1) = follow HW1_EN signal
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BIT(2) = follow HW2_EN signal
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BIT(3) = follow HW3_EN signal
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$ref: /schemas/types.yaml#/definitions/uint32
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qcom,init-pin-ctrl-mode:
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description: |
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||||||
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Bit mask specifying which hardware pins should be
|
||||||
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used to force the regulator into high power
|
||||||
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mode, if any. Supported bits are:
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||||||
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0 = ignore all hardware enable signals
|
||||||
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BIT(0) = follow HW0_EN signal
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||||||
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BIT(1) = follow HW1_EN signal
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||||||
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BIT(2) = follow HW2_EN signal
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||||||
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BIT(3) = follow HW3_EN signal
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||||||
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BIT(4) = follow PMIC awake state
|
||||||
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$ref: /schemas/types.yaml#/definitions/uint32
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||||||
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||||||
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qcom,init-pin-ctrl-voltage1:
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description: |
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||||||
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Minimum voltage in micro-volts to use while pin
|
||||||
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control 1 is enabled. This property only
|
||||||
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applies to BoB type regulators.
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||||||
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$ref: /schemas/types.yaml#/definitions/uint32
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||||||
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||||||
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qcom,init-pin-ctrl-voltage2:
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||||||
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description: |
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||||||
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Minimum voltage in micro-volts to use while pin
|
||||||
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control 2 is enabled. This property only
|
||||||
|
applies to BoB type regulators.
|
||||||
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$ref: /schemas/types.yaml#/definitions/uint32
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||||||
|
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||||||
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qcom,init-pin-ctrl-voltage3:
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||||||
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description: |
|
||||||
|
Minimum voltage in micro-volts to use while pin
|
||||||
|
control 3 is enabled. This property only
|
||||||
|
applies to BoB type regulators.
|
||||||
|
$ref: /schemas/types.yaml#/definitions/uint32
|
||||||
|
|
||||||
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qcom,init-frequency:
|
||||||
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description: |
|
||||||
|
Switching frequency divisor for SMPS regulators.
|
||||||
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Supported values are n = 0 to 31 where
|
||||||
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freq = 19.2 MHz / (n + 1).
|
||||||
|
$ref: /schemas/types.yaml#/definitions/uint32
|
||||||
|
|
||||||
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qcom,init-head-room:
|
||||||
|
description: |
|
||||||
|
Voltage head room in mV required for the
|
||||||
|
regulator. This head room value should be used
|
||||||
|
in situations where the device connected to the
|
||||||
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output of the regulator has low noise tolerance.
|
||||||
|
Note that the RPM independently enforces a
|
||||||
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safety head room value for subregulated LDOs
|
||||||
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which is sufficient to account for LDO drop-out
|
||||||
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voltage.
|
||||||
|
$ref: /schemas/types.yaml#/definitions/uint32
|
||||||
|
|
||||||
|
qcom,init-quiet-mode:
|
||||||
|
description: |
|
||||||
|
Specify that quiet mode is needed for an SMPS
|
||||||
|
regulator in order to have lower output noise.
|
||||||
|
Supported values are:
|
||||||
|
0 = No quiet mode
|
||||||
|
1 = Quiet mode
|
||||||
|
2 = Super quiet mode
|
||||||
|
$ref: /schemas/types.yaml#/definitions/uint32
|
||||||
|
|
||||||
|
qcom,init-freq-reason:
|
||||||
|
description: |
|
||||||
|
Consumer requiring specified frequency for an
|
||||||
|
SMPS regulator. Supported values are:
|
||||||
|
0 = None
|
||||||
|
1 = Bluetooth
|
||||||
|
2 = GPS
|
||||||
|
4 = WLAN
|
||||||
|
8 = WAN
|
||||||
|
$ref: /schemas/types.yaml#/definitions/uint32
|
||||||
|
|
||||||
|
qcom,init-voltage-corner:
|
||||||
|
description: |
|
||||||
|
Performance corner to use in order to determine
|
||||||
|
voltage set point. This value corresponds to
|
||||||
|
the actual value that will be sent and is not
|
||||||
|
incremented by 1 like the values used inside of
|
||||||
|
the regulator framework. The meaning of corner
|
||||||
|
values is set by the RPM. It is possible that
|
||||||
|
different regulators on a given platform or
|
||||||
|
similar regulators on different platforms will
|
||||||
|
utilize different corner values. These are
|
||||||
|
corner values supported on MSM8974 for PMIC
|
||||||
|
PM8841 SMPS 2 (VDD_Dig); nominal voltages for
|
||||||
|
these corners are also shown:
|
||||||
|
0 = None (don't care)
|
||||||
|
1 = Retention (0.5000 V)
|
||||||
|
2 = SVS Krait (0.7250 V)
|
||||||
|
3 = SVS SOC (0.8125 V)
|
||||||
|
4 = Normal (0.9000 V)
|
||||||
|
5 = Turbo (0.9875 V)
|
||||||
|
6 = Super Turbo (1.0500 V)
|
||||||
|
$ref: /schemas/types.yaml#/definitions/uint32
|
||||||
|
|
||||||
|
qcom,init-disallow-bypass:
|
||||||
|
description: |
|
||||||
|
Specify that bypass mode should not be used for a
|
||||||
|
given LDO regulator. When in bypass mode, an
|
||||||
|
LDO performs no regulation and acts as a simple
|
||||||
|
switch. The RPM can utilize this mode for an
|
||||||
|
LDO that is subregulated from an SMPS when it is
|
||||||
|
possible to reduce the SMPS voltage to the
|
||||||
|
desired LDO output level. Bypass mode may be
|
||||||
|
disallowed if lower LDO output noise is
|
||||||
|
required. Supported values are:
|
||||||
|
0 = Allow RPM to utilize LDO bypass mode
|
||||||
|
if possible
|
||||||
|
1 = Disallow LDO bypass mode
|
||||||
|
$ref: /schemas/types.yaml#/definitions/flag
|
||||||
|
|
||||||
|
qcom,init-voltage-floor-corner:
|
||||||
|
description: |
|
||||||
|
Minimum performance corner to use if any
|
||||||
|
processor in the system is awake.This property
|
||||||
|
supports the same values as
|
||||||
|
qcom,init-voltage-corner.
|
||||||
|
$ref: /schemas/types.yaml#/definitions/uint32
|
||||||
|
|
||||||
|
qcom,init-voltage-level:
|
||||||
|
description: |
|
||||||
|
Performance level to use in order to determine
|
||||||
|
voltage set point. The meaning of level
|
||||||
|
values is set by the RPM. It is possible that
|
||||||
|
different regulators on a given platform or
|
||||||
|
similar regulators on different platforms will
|
||||||
|
utilize different level values. These are
|
||||||
|
level values supported on MSM8952 for PMIC
|
||||||
|
PM8952 SMPS 2 (VDD_Dig); nominal voltages for
|
||||||
|
these level are also shown:
|
||||||
|
16 = Retention (0.5000 V)
|
||||||
|
128 = SVS (1.0500 V)
|
||||||
|
192 = SVS+ (1.1550 V)
|
||||||
|
256 = Normal (1.2250 V)
|
||||||
|
320 = Normal+ (1.2875 V)
|
||||||
|
384 = Turbo (1.3500 V)
|
||||||
|
$ref: /schemas/types.yaml#/definitions/uint32
|
||||||
|
|
||||||
|
qcom,init-voltage-floor-level:
|
||||||
|
description: |
|
||||||
|
Minimum performance level to use if any
|
||||||
|
processor in the system is awake. This property
|
||||||
|
supports the same values as
|
||||||
|
qcom,init-voltage-level
|
||||||
|
$ref: /schemas/types.yaml#/definitions/uint32
|
||||||
|
|
||||||
|
additionalProperties: false
|
||||||
|
|
||||||
|
required:
|
||||||
|
- compatible
|
||||||
|
- regulator-name
|
||||||
|
- qcom,set
|
||||||
|
|
||||||
|
examples:
|
||||||
|
- |
|
||||||
|
|
||||||
|
rpm-regulator-smpb1 {
|
||||||
|
compatible = "qcom,rpm-smd-regulator-resource";
|
||||||
|
qcom,resource-name = "smpb";
|
||||||
|
qcom,resource-id = <1>;
|
||||||
|
qcom,regulator-type = <1>;
|
||||||
|
qcom,hpm-min-load = <100000>;
|
||||||
|
|
||||||
|
pm8841_s1: regulator-s1 {
|
||||||
|
compatible = "qcom,rpm-smd-regulator";
|
||||||
|
regulator-name = "8841_s1";
|
||||||
|
qcom,set = <3>;
|
||||||
|
regulator-min-microvolt = <900000>;
|
||||||
|
regulator-max-microvolt = <1150000>;
|
||||||
|
qcom,init-voltage = <1150000>;
|
||||||
|
};
|
||||||
|
|
||||||
|
pm8841_s1_ao: regulator-s1-ao {
|
||||||
|
compatible = "qcom,rpm-smd-regulator";
|
||||||
|
regulator-name = "8841_s1_ao";
|
||||||
|
qcom,set = <1>;
|
||||||
|
regulator-min-microvolt = <900000>;
|
||||||
|
regulator-max-microvolt = <1150000>;
|
||||||
|
};
|
||||||
|
|
||||||
|
pm8841_s1_corner: regulator-s1-corner {
|
||||||
|
compatible = "qcom,rpm-smd-regulator";
|
||||||
|
regulator-name = "8841_s1_corner";
|
||||||
|
qcom,set = <3>;
|
||||||
|
regulator-min-microvolt = <1>;
|
||||||
|
regulator-max-microvolt = <6>;
|
||||||
|
qcom,init-voltage-corner = <3>;
|
||||||
|
qcom,use-voltage-corner;
|
||||||
|
};
|
||||||
|
};
|
||||||
|
|
||||||
|
rpm-regulator-ldoa2 {
|
||||||
|
compatible = "qcom,rpm-smd-regulator-resource";
|
||||||
|
qcom,resource-name = "ldoa";
|
||||||
|
qcom,resource-id = <2>;
|
||||||
|
qcom,regulator-type = <0>;
|
||||||
|
qcom,hpm-min-load = <10000>;
|
||||||
|
|
||||||
|
regulator-l2 {
|
||||||
|
compatible = "qcom,rpm-smd-regulator";
|
||||||
|
regulator-name = "8941_l2";
|
||||||
|
qcom,set = <3>;
|
||||||
|
regulator-min-microvolt = <1225000>;
|
||||||
|
regulator-max-microvolt = <1225000>;
|
||||||
|
qcom,init-voltage = <1225000>;
|
||||||
|
};
|
||||||
|
};
|
||||||
|
...
|
||||||
Reference in New Issue
Block a user