From: Matti Vaittinen <mazziesaccount@gmail.com>
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>
---
Revision history:
v3 => v4:
- Drop type from ldon-head
- Fix the name patterns for regulator nodes and names
v2 => v3:
- drop unnecessary descriptions
- use microvolts for the 'ldon-head' dt-property
RFCv1 => v2:
- No changes
---
.../regulator/rohm,bd72720-regulator.yaml | 148 ++++++++++++++++++
1 file changed, 148 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..5518082129bd
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/rohm,bd72720-regulator.yaml
@@ -0,0 +1,148 @@
+# 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
--
2.51.1
On Thu, 13 Nov 2025 10:51:32 +0200, Matti Vaittinen wrote: > From: Matti Vaittinen <mazziesaccount@gmail.com> > > 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> > > --- > Revision history: > v3 => v4: > - Drop type from ldon-head > - Fix the name patterns for regulator nodes and names > > v2 => v3: > - drop unnecessary descriptions > - use microvolts for the 'ldon-head' dt-property > > RFCv1 => v2: > - No changes > --- > .../regulator/rohm,bd72720-regulator.yaml | 148 ++++++++++++++++++ > 1 file changed, 148 insertions(+) > create mode 100644 Documentation/devicetree/bindings/regulator/rohm,bd72720-regulator.yaml > Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
On Thu, 13 Nov 2025 10:51:32 +0200, Matti Vaittinen wrote: > From: Matti Vaittinen <mazziesaccount@gmail.com> > > 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> > > --- > Revision history: > v3 => v4: > - Drop type from ldon-head > - Fix the name patterns for regulator nodes and names > > v2 => v3: > - drop unnecessary descriptions > - use microvolts for the 'ldon-head' dt-property > > RFCv1 => v2: > - No changes > --- > .../regulator/rohm,bd72720-regulator.yaml | 148 ++++++++++++++++++ > 1 file changed, 148 insertions(+) > create mode 100644 Documentation/devicetree/bindings/regulator/rohm,bd72720-regulator.yaml > My bot found errors running 'make dt_binding_check' on your patch: yamllint warnings/errors: dtschema/dtc warnings/errors: doc reference errors (make refcheckdocs): Warning: Documentation/devicetree/bindings/regulator/rohm,bd72720-regulator.yaml references a file that doesn't exist: Documentation/devicetree/bindings/mfd/rohm,bd72720-pmic.yaml Documentation/devicetree/bindings/regulator/rohm,bd72720-regulator.yaml: Documentation/devicetree/bindings/mfd/rohm,bd72720-pmic.yaml See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/21e83fccf2d2422f4bea1c482dcd3cb1aeda4085.1763022807.git.mazziesaccount@gmail.com The base for the series is generally the latest rc1. A different dependency should be noted in *this* patch. If you already ran 'make dt_binding_check' and didn't see the above error(s), then make sure 'yamllint' is installed and dt-schema is up to date: pip3 install dtschema --upgrade Please check and re-submit after running the above command yourself. Note that DT_SCHEMA_FILES can be set to your schema file to speed up checking your schema. However, it must be unset to test all examples with your schema.
© 2016 - 2026 Red Hat, Inc.