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Message-ID: <20251027210356.GA1565353-robh@kernel.org> Date: Mon, 27 Oct 2025 16:03:56 -0500 From: Rob Herring <robh@...nel.org> To: Matti Vaittinen <mazziesaccount@...il.com> Cc: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>, Lee Jones <lee@...nel.org>, Pavel Machek <pavel@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Sebastian Reichel <sre@...nel.org>, Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, Michael Turquette <mturquette@...libre.com>, Stephen Boyd <sboyd@...nel.org>, Linus Walleij <linus.walleij@...aro.org>, Bartosz Golaszewski <brgl@...ev.pl>, Andreas Kemnade <andreas@...nade.info>, Alexandre Belloni <alexandre.belloni@...tlin.com>, linux-leds@...r.kernel.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org, linux-clk@...r.kernel.org, linux-gpio@...r.kernel.org, linux-rtc@...r.kernel.org Subject: Re: [PATCH v2 01/15] dt-bindings: regulator: ROHM BD72720 On Mon, Oct 27, 2025 at 01:44:49PM +0200, Matti Vaittinen wrote: > 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-millivolt' 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@...il.com> > > --- > Revision history: > RFCv1 =>: > - No changes > --- > .../regulator/rohm,bd72720-regulator.yaml | 153 ++++++++++++++++++ > 1 file changed, 153 insertions(+) > create mode 100644 Documentation/devicetree/bindings/regulator/rohm,bd72720-regulator.yaml > > diff --git a/Documentation/devicetree/bindings/regulator/rohm,bd72720-regulator.yaml b/Documentation/devicetree/bindings/regulator/rohm,bd72720-regulator.yaml > new file mode 100644 > index 000000000000..665086f56928 > --- /dev/null > +++ b/Documentation/devicetree/bindings/regulator/rohm,bd72720-regulator.yaml > @@ -0,0 +1,153 @@ > +# 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@...il.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[1-11]$": > + type: object > + description: > + Properties for single LDO regulator. > + $ref: regulator.yaml# > + > + properties: > + regulator-name: > + pattern: "^ldo[1-11]$" > + description: > + should be "ldo1", ..., "ldo11" No need to repeat in prose what the schema says. > + > + 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. > + $ref: /schemas/types.yaml#/definitions/uint32 > + minimum: 0 > + maximum: 3300000 > + > + # Supported default DVS states: > + # ldo | run | idle | suspend | lpsr > + # -------------------------------------------------------------- > + # 1, 2, 3, and 4 | supported | supported | supported | supported > + # -------------------------------------------------------------- > + # 5 - 11 | supported (*) > + # -------------------------------------------------------------- > + # > + # (*) All states use same voltage but have own enable / disable > + # settings. Voltage 0 can be specified for a state to make > + # regulator disabled on that state. > + > + unevaluatedProperties: false > + > + "^buck[1-10]$": > + type: object > + description: > + Properties for single BUCK regulator. > + $ref: regulator.yaml# > + > + properties: > + regulator-name: > + pattern: "^buck[1-10]$" > + description: > + should be "buck1", ..., "buck10" Same here. > + > + rohm,ldon-head-millivolt: Use standard unit-suffixes. (-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. > + $ref: /schemas/types.yaml#/definitions/uint32 > + minimum: 50 > + maximum: 300 > + > + 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 > -- > 2.51.0 >
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