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dt-bindings: regulator: ROHM BD72720

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The ROHM BD72720 is a new PMIC with 10 BUCk and 11 LDO regulators.

The BD72720 is designed to support using the BUCK10 as a supply for
the LDOs 1 to 4. When the BUCK10 is used for this, it can be set to a
LDON_HEAD mode. In this mode, the BUCK10 voltage can't be controlled by
software, but the voltage is adjusted by PMIC to match the LDO1 .. LDO4
voltages with a given offset. Offset can be 50mV .. 300mV and is
changeable at 50mV steps.

Add 'ldon-head-microvolt' property to denote a board which is designed
to utilize the LDON_HEAD mode.

All other properties are already existing.

Add dt-binding doc for ROHM BD72720 regulators to make it usable.

Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/81cb38d0ae1b3fa426e40d5b0a93f69a0f374657.1765804226.git.mazziesaccount@gmail.com
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
Matti Vaittinen 2025-12-15 15:17:17 +02:00 committed by Lee Jones
parent 8f0b4cce44
commit 4d08b3634f
1 changed files with 148 additions and 0 deletions
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Documentation/devicetree/bindings/regulator/rohm,bd72720-regulator.yaml Normal file
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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/regulator/rohm,bd72720-regulator.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: ROHM BD72720 Power Management Integrated Circuit regulators
maintainers:
- Matti Vaittinen <mazziesaccount@gmail.com>
description: |
This module is part of the ROHM BD72720 MFD device. For more details
see Documentation/devicetree/bindings/mfd/rohm,bd72720-pmic.yaml.
The regulator controller is represented as a sub-node of the PMIC node
on the device tree.
Regulator nodes should be named to BUCK_<number> and LDO_<number>.
The valid names for BD72720 regulator nodes are
buck1, buck2, buck3, buck4, buck5, buck6, buck7, buck8, buck9, buck10
ldo1, ldo2, ldo3, ldo4, ldo5, ldo6, ldo7, ldo8, ldo9, ldo10, ldo11
patternProperties:
"^ldo([1-9]|1[0-1])$":
type: object
description:
Properties for single LDO regulator.
$ref: regulator.yaml#
properties:
regulator-name:
pattern: "^ldo([1-9]|1[0-1])$"
rohm,dvs-run-voltage:
description:
PMIC default "RUN" state voltage in uV. See below table for
LDOs which support this. 0 means disabled.
$ref: /schemas/types.yaml#/definitions/uint32
minimum: 0
maximum: 3300000
rohm,dvs-idle-voltage:
description:
PMIC default "IDLE" state voltage in uV. See below table for
LDOs which support this. 0 means disabled.
$ref: /schemas/types.yaml#/definitions/uint32
minimum: 0
maximum: 3300000
rohm,dvs-suspend-voltage:
description:
PMIC default "SUSPEND" state voltage in uV. See below table for
LDOs which support this. 0 means disabled.
$ref: /schemas/types.yaml#/definitions/uint32
minimum: 0
maximum: 3300000
rohm,dvs-lpsr-voltage:
description:
PMIC default "deep-idle" state voltage in uV. See below table for
LDOs which support this. 0 means disabled.
$ref: /schemas/types.yaml#/definitions/uint32
minimum: 0
maximum: 3300000
# Supported default DVS states:
# ldo | run | idle | suspend | lpsr
# --------------------------------------------------------------
# 1, 2, 3, and 4 | supported | supported | supported | supported
# --------------------------------------------------------------
# 5 - 11 | supported (*)
# --------------------------------------------------------------
#
# (*) All states use same voltage but have own enable / disable
# settings. Voltage 0 can be specified for a state to make
# regulator disabled on that state.
unevaluatedProperties: false
"^buck([1-9]|10)$":
type: object
description:
Properties for single BUCK regulator.
$ref: regulator.yaml#
properties:
regulator-name:
pattern: "^buck([1-9]|10)$"
rohm,ldon-head-microvolt:
description:
Set this on boards where BUCK10 is used to supply LDOs 1-4. The bucki
voltage will be changed by the PMIC to follow the LDO output voltages
with the offset voltage given here. This will improve the LDO efficiency.
minimum: 50000
maximum: 300000
rohm,dvs-run-voltage:
description:
PMIC default "RUN" state voltage in uV. See below table for
bucks which support this. 0 means disabled.
$ref: /schemas/types.yaml#/definitions/uint32
minimum: 0
maximum: 3300000
rohm,dvs-idle-voltage:
description:
PMIC default "IDLE" state voltage in uV. See below table for
bucks which support this. 0 means disabled.
$ref: /schemas/types.yaml#/definitions/uint32
minimum: 0
maximum: 3300000
rohm,dvs-suspend-voltage:
description:
PMIC default "SUSPEND" state voltage in uV. See below table for
bucks which support this. 0 means disabled.
$ref: /schemas/types.yaml#/definitions/uint32
minimum: 0
maximum: 3300000
rohm,dvs-lpsr-voltage:
description:
PMIC default "deep-idle" state voltage in uV. See below table for
bucks which support this. 0 means disabled.
$ref: /schemas/types.yaml#/definitions/uint32
minimum: 0
maximum: 3300000
# Supported default DVS states:
# buck | run | idle | suspend | lpsr
# --------------------------------------------------------------
# 1, 2, 3, and 4 | supported | supported | supported | supported
# --------------------------------------------------------------
# 5 - 10 | supported (*)
# --------------------------------------------------------------
#
# (*) All states use same voltage but have own enable / disable
# settings. Voltage 0 can be specified for a state to make
# regulator disabled on that state.
required:
- regulator-name
unevaluatedProperties: false
additionalProperties: false