[PATCH RESEND v6 05/17] dt-bindings: mfd: ROHM BD72720

Matti Vaittinen
2025-12-15T13:18:36Z

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From: Matti Vaittinen <mazziesaccount@gmail.com>

The ROHM BD72720 is a power management IC integrating regulators, GPIOs,
charger, LEDs, RTC and a clock gate.

Add dt-binding doc for ROHM BD72720.

Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

---
Revision history:
v5 =>:
- No changes

v4 => v5:
- drop rohm, -prefix from vdr parameters
- Link to battery.yaml, not to rohm,vdr-battry.yaml which was removed

v3 => v4:
- Fix typo from the reference to regulator binding
- Fix Rsense limits to micro Ohms
- Fix compatible string in the example
- Fix regulator node names (to lower-case) in the example
- Add the missing regulator nodes to the example

v2 => v3:
- Styling
- Document all pin functions
- use pattern-properties
- re-use existing Rsense binding
- correct the example

RFCv1 => v2:
- Typofixes
---
.../bindings/mfd/rohm,bd72720-pmic.yaml | 339 ++++++++++++++++++
1 file changed, 339 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mfd/rohm,bd72720-pmic.yaml

diff --git a/Documentation/devicetree/bindings/mfd/rohm,bd72720-pmic.yaml b/Documentation/devicetree/bindings/mfd/rohm,bd72720-pmic.yaml
new file mode 100644
index 000000000000..9f42097dfbac
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/rohm,bd72720-pmic.yaml
@@ -0,0 +1,339 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/rohm,bd72720-pmic.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ROHM BD72720 Power Management Integrated Circuit
+
+maintainers:
+ - Matti Vaittinen <mazziesaccount@gmail.com>
+
+description:
+ BD72720 is a single-chip power management IC for battery-powered portable
+ devices. The BD72720 integrates 10 bucks and 11 LDOs, and a 3000 mA
+ switching charger. The IC also includes a Coulomb counter, a real-time
+ clock (RTC), GPIOs and a 32.768 kHz clock gate.
+
+# In addition to the properties found from the charger node, the ROHM BD72720
+# uses properties from a static battery node. Please see the:
+# Documentation/devicetree/bindings/power/supply/battery.yaml
+#
+# Following properties are used
+# when present:
+#
+# charge-full-design-microamp-hours: Battry capacity in mAh
+# voltage-max-design-microvolt: Maximum voltage
+# voltage-min-design-microvolt: Minimum voltage system is still operating.
+# degrade-cycle-microamp-hours: Capacity lost due to aging at each full
+# charge cycle.
+# ocv-capacity-celsius: Array of OCV table temperatures. 1/table.
+# ocv-capacity-table-<N>: Table of OCV voltage/SOC pairs. Corresponds
+# N.th temperature in ocv-capacity-celsius
+#
+# volt-drop-thresh-microvolt: Threshold for starting the VDR correction
+# volt-drop-soc: Table of capacity values matching the
+# values in VDR tables.
+#
+# volt-drop-temperatures-millicelsius: Temperatures corresponding to the volage
+# drop values given in volt-drop-[0-9]-microvolt
+#
+# volt-drop-[0-9]-microvolt: VDR table for a temperature specified in
+# volt-drop-temperatures-millicelsius
+#
+# VDR tables are (usually) determined for a specific battery by ROHM.
+# The battery node would then be referred from the charger node:
+#
+# monitored-battery = <&battery>;
+
+properties:
+ compatible:
+ const: rohm,bd72720
+
+ reg:
+ description:
+ I2C slave address.
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ gpio-controller: true
+
+ "#gpio-cells":
+ const: 2
+ description:
+ The first cell is the pin number and the second cell is used to specify
+ flags. See the gpio binding document for more information.
+
+ clocks:
+ maxItems: 1
+
+ "#clock-cells":
+ const: 0
+
+ clock-output-names:
+ const: bd71828-32k-out
+
+ rohm,clkout-open-drain:
+ description: clk32kout mode. Set to 1 for "open-drain" or 0 for "cmos".
+ $ref: /schemas/types.yaml#/definitions/uint32
+ maximum: 1
+
+ rohm,charger-sense-resistor-micro-ohms:
+ minimum: 10000
+ maximum: 50000
+ description:
+ BD72720 has a SAR ADC for measuring charging currents. External sense
+ resistor (RSENSE in data sheet) should be used. If some other but
+ 30 mOhm resistor is used the resistance value should be given here in
+ micro Ohms.
+
+ regulators:
+ $ref: /schemas/regulator/rohm,bd72720-regulator.yaml
+ description:
+ List of child nodes that specify the regulators.
+
+ leds:
+ $ref: /schemas/leds/rohm,bd71828-leds.yaml
+
+ rohm,pin-fault_b:
+ $ref: /schemas/types.yaml#/definitions/string
+ description:
+ BD72720 has an OTP option to use fault_b-pin for different
+ purposes. Set this property accordingly. OTP options are
+ OTP0 - bi-directional FAULT_B or READY indicator depending on a
+ 'sub option'
+ OTP1 - GPO
+ OTP2 - Power sequencer output.
+ enum:
+ - faultb
+ - readyind
+ - gpo
+ - pwrseq
+
+patternProperties:
+ "^rohm,pin-dvs[0-1]$":
+ $ref: /schemas/types.yaml#/definitions/string
+ description:
+ BD72720 has 4 different OTP options to determine the use of dvs<X>-pins.
+ OTP0 - regulator RUN state control.
+ OTP1 - GPI.
+ OTP2 - GPO.
+ OTP3 - Power sequencer output.
+ This property specifies the use of the pin.
+ enum:
+ - dvs-input
+ - gpi
+ - gpo
+ - pwrseq
+
+ "^rohm,pin-exten[0-1]$":
+ $ref: /schemas/types.yaml#/definitions/string
+ description: BD72720 has an OTP option to use exten0-pin for different
+ purposes. Set this property accordingly.
+ OTP0 - GPO
+ OTP1 - Power sequencer output.
+ enum:
+ - gpo
+ - pwrseq
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - clocks
+ - "#clock-cells"
+ - regulators
+ - gpio-controller
+ - "#gpio-cells"
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+ #include <dt-bindings/leds/common.h>
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ pmic: pmic@4b {
+ compatible = "rohm,bd72720";
+ reg = <0x4b>;
+
+ interrupt-parent = <&gpio1>;
+ interrupts = <29 IRQ_TYPE_LEVEL_LOW>;
+
+ clocks = <&osc 0>;
+ #clock-cells = <0>;
+ clock-output-names = "bd71828-32k-out";
+
+ gpio-controller;
+ #gpio-cells = <2>;
+
+ rohm,pin-dvs0 = "gpi";
+ rohm,pin-dvs1 = "gpi";
+ rohm,pin-exten0 = "gpo";
+ rohm,pin-exten1 = "gpo";
+ rohm,pin-fault_b = "faultb";
+
+ rohm,charger-sense-resistor-micro-ohms = <10000>;
+
+ regulators {
+ buck1 {
+ regulator-name = "buck1";
+ regulator-min-microvolt = <500000>;
+ regulator-max-microvolt = <2000000>;
+ regulator-ramp-delay = <2500>;
+ };
+ buck2 {
+ regulator-name = "buck2";
+ regulator-min-microvolt = <500000>;
+ regulator-max-microvolt = <2000000>;
+ regulator-ramp-delay = <2500>;
+ };
+ buck3 {
+ regulator-name = "buck3";
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <2000000>;
+ };
+ buck4 {
+ regulator-name = "buck4";
+ regulator-min-microvolt = <1000000>;
+ regulator-max-microvolt = <1800000>;
+ };
+ buck5 {
+ regulator-name = "buck5";
+ regulator-min-microvolt = <2500000>;
+ regulator-max-microvolt = <3300000>;
+ };
+ buck6 {
+ regulator-name = "buck6";
+ regulator-min-microvolt = <500000>;
+ regulator-max-microvolt = <2000000>;
+ regulator-ramp-delay = <2500>;
+ };
+ buck7 {
+ regulator-name = "buck7";
+ regulator-min-microvolt = <500000>;
+ regulator-max-microvolt = <2000000>;
+ regulator-ramp-delay = <2500>;
+ };
+ buck8 {
+ regulator-name = "buck8";
+ regulator-min-microvolt = <500000>;
+ regulator-max-microvolt = <1700000>;
+ regulator-ramp-delay = <2500>;
+ rohm,dvs-run-voltage = <1700000>;
+ rohm,dvs-idle-voltage = <1>;
+ rohm,dvs-suspend-voltage = <1>;
+ rohm,dvs-lpsr-voltage = <0>;
+ regulator-boot-on;
+ };
+ buck9 {
+ regulator-name = "buck9";
+ regulator-min-microvolt = <500000>;
+ regulator-max-microvolt = <1700000>;
+ regulator-ramp-delay = <2500>;
+ rohm,dvs-run-voltage = <1700000>;
+ rohm,dvs-idle-voltage = <1>;
+ rohm,dvs-suspend-voltage = <1>;
+ rohm,dvs-lpsr-voltage = <0>;
+ regulator-boot-on;
+ };
+ buck10 {
+ regulator-name = "buck10";
+ regulator-min-microvolt = <500000>;
+ regulator-max-microvolt = <1700000>;
+ regulator-ramp-delay = <2500>;
+ rohm,dvs-run-voltage = <1700000>;
+ rohm,dvs-idle-voltage = <1>;
+ rohm,dvs-suspend-voltage = <1>;
+ rohm,dvs-lpsr-voltage = <0>;
+ regulator-boot-on;
+ };
+ ldo1 {
+ regulator-name = "ldo1";
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <3300000>;
+ };
+ ldo2 {
+ regulator-name = "ldo2";
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <3300000>;
+ };
+ ldo3 {
+ regulator-name = "ldo3";
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <3300000>;
+ };
+ ldo4 {
+ regulator-name = "ldo4";
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <3300000>;
+ };
+ ldo5 {
+ regulator-name = "ldo5";
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <3300000>;
+ };
+ ldo6 {
+ regulator-name = "ldo6";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+ ldo7 {
+ regulator-name = "ldo7";
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <3300000>;
+ };
+ ldo8 {
+ regulator-name = "ldo8";
+ regulator-min-microvolt = <750000>;
+ regulator-max-microvolt = <3300000>;
+ rohm,dvs-suspend-voltage = <0>;
+ rohm,dvs-lpsr-voltage = <1>;
+ rohm,dvs-run-voltage = <750000>;
+ };
+ ldo9 {
+ regulator-name = "ldo9";
+ regulator-min-microvolt = <750000>;
+ regulator-max-microvolt = <3300000>;
+ rohm,dvs-suspend-voltage = <0>;
+ rohm,dvs-lpsr-voltage = <1>;
+ rohm,dvs-run-voltage = <750000>;
+ };
+ ldo10 {
+ regulator-name = "ldo10";
+ regulator-min-microvolt = <750000>;
+ regulator-max-microvolt = <3300000>;
+ rohm,dvs-suspend-voltage = <0>;
+ rohm,dvs-lpsr-voltage = <1>;
+ rohm,dvs-run-voltage = <750000>;
+ };
+ ldo11 {
+ regulator-name = "ldo11";
+ regulator-min-microvolt = <750000>;
+ regulator-max-microvolt = <3300000>;
+ rohm,dvs-suspend-voltage = <0>;
+ rohm,dvs-lpsr-voltage = <1>;
+ rohm,dvs-run-voltage = <750000>;
+ };
+ };
+
+ leds {
+ compatible = "rohm,bd71828-leds";
+
+ led-1 {
+ rohm,led-compatible = "bd71828-grnled";
+ function = LED_FUNCTION_INDICATOR;
+ color = <LED_COLOR_ID_GREEN>;
+ };
+ led-2 {
+ rohm,led-compatible = "bd71828-ambled";
+ function = LED_FUNCTION_CHARGING;
+ color = <LED_COLOR_ID_AMBER>;
+ };
+ };
+ };
+ };