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Message-ID: <73d30c0c2fb56582c51b6ff9dea3f5145ed36c34.1759824376.git.mazziesaccount@gmail.com>
Date: Tue, 7 Oct 2025 11:32:56 +0300
From: Matti Vaittinen <mazziesaccount@...il.com>
To: Matti Vaittinen <mazziesaccount@...il.com>,
Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
Cc: Lee Jones <lee@...nel.org>, Pavel Machek <pavel@...nel.org>,
Rob Herring <robh@...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>,
Linus Walleij <linus.walleij@...aro.org>,
Bartosz Golaszewski <brgl@...ev.pl>,
Matti Vaittinen <mazziesaccount@...il.com>,
Andreas Kemnade <andreas@...nade.info>, linux-leds@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-pm@...r.kernel.org, linux-gpio@...r.kernel.org
Subject: [RFC PATCH 01/13] dt-bindings: regulator: ROHM BD72720
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>
---
.../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"
+
+ 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"
+
+ rohm,ldon-head-millivolt:
+ 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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