# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/mfd/rohm,bd71847-pmic.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: ROHM BD71847 and BD71850 Power Management Integrated Circuit
maintainers:
- Matti Vaittinen <mazziesaccount@gmail.com>
description: |
BD71847AMWV and BD71850MWV are programmable Power Management ICs for powering
single-core, dual-core, and quad-core SoCs such as NXP-i.MX 8M. It is
optimized for low BOM cost and compact solution footprint. BD71847MWV and
BD71850MWV integrate 6 Buck regulators and 6 LDOs.
Datasheets are available at
https://www.rohm.com/products/power-management/power-management-ic-for-system/industrial-consumer-applications/nxp-imx/bd71847amwv-product
https://www.rohm.com/products/power-management/power-management-ic-for-system/industrial-consumer-applications/nxp-imx/bd71850mwv-product
properties:
compatible:
enum:
- rohm,bd71847
- rohm,bd71850
reg:
description:
I2C slave address.
maxItems: 1
interrupts:
maxItems: 1
clocks:
maxItems: 1
"#clock-cells":
const: 0
clock-output-names:
maxItems: 1
# The BD71847 abd BD71850 support two different HW states as reset target
# states. States are called as SNVS and READY. At READY state all the PMIC
# power outputs go down and OTP is reload. At the SNVS state all other logic
# and external devices apart from the SNVS power domain are shut off. Please
# refer to NXP i.MX8 documentation for further information regarding SNVS
# state. When a reset is done via SNVS state the PMIC OTP data is not reload.
# This causes power outputs that have been under SW control to stay down when
# reset has switched power state to SNVS. If reset is done via READY state the
# power outputs will be returned to HW control by OTP loading. Thus the reset
# target state is set to READY by default. If SNVS state is used the boot
# crucial regulators must have the regulator-always-on and regulator-boot-on
# properties set in regulator node.
rohm,reset-snvs-powered:
description:
Transfer PMIC to SNVS state at reset.
type: boolean
# Configure the "short press" and "long press" timers for the power button.
# Values are rounded to what hardware supports
# Short-press:
# Shortest being 10ms, next 500ms and then multiple of 500ms up to 7,5s
# Long-press:
# Shortest being 10ms, next 1000ms and then multiple of 1000ms up to 15s
# If these properties are not present the existing # configuration (from
# bootloader or OTP) is not touched.
rohm,short-press-ms:
description:
Short press duration in milliseconds
enum:
- 10
- 500
- 1000
- 1500
- 2000
- 2500
- 3000
- 3500
- 4000
- 4500
- 5000
- 5500
- 6000
- 6500
- 7000
- 7500
rohm,long-press-ms:
description:
Long press duration in milliseconds
enum:
- 10
- 1000
- 2000
- 3000
- 4000
- 5000
- 6000
- 7000
- 8000
- 9000
- 10000
- 11000
- 12000
- 13000
- 14000
- 15000
regulators:
$ref: ../regulator/rohm,bd71847-regulator.yaml
description:
List of child nodes that specify the regulators.
required:
- compatible
- reg
- interrupts
- regulators
additionalProperties: false
dependencies:
'#clock-cells': [clocks]
clocks: ['#clock-cells']
examples:
- |
#include <dt-bindings/interrupt-controller/irq.h>
i2c {
#address-cells = <1>;
#size-cells = <0>;
pmic: pmic@4b {
compatible = "rohm,bd71847";
reg = <0x4b>;
interrupt-parent = <&gpio1>;
interrupts = <29 IRQ_TYPE_LEVEL_LOW>;
#clock-cells = <0>;
clocks = <&osc 0>;
rohm,reset-snvs-powered;
rohm,short-press-ms = <10>;
rohm,long-press-ms = <2000>;
regulators {
buck1: BUCK1 {
regulator-name = "buck1";
regulator-min-microvolt = <700000>;
regulator-max-microvolt = <1300000>;
regulator-boot-on;
regulator-always-on;
regulator-ramp-delay = <1250>;
rohm,dvs-run-voltage = <900000>;
rohm,dvs-idle-voltage = <850000>;
rohm,dvs-suspend-voltage = <800000>;
};
buck2: BUCK2 {
regulator-name = "buck2";
regulator-min-microvolt = <700000>;
regulator-max-microvolt = <1300000>;
regulator-boot-on;
regulator-always-on;
regulator-ramp-delay = <1250>;
rohm,dvs-run-voltage = <1000000>;
rohm,dvs-idle-voltage = <900000>;
};
buck3: BUCK3 {
regulator-name = "buck3";
regulator-min-microvolt = <550000>;
regulator-max-microvolt = <1350000>;
regulator-boot-on;
};
buck4: BUCK4 {
regulator-name = "buck4";
regulator-min-microvolt = <2600000>;
regulator-max-microvolt = <3300000>;
regulator-boot-on;
};
buck5: BUCK5 {
regulator-name = "buck5";
regulator-min-microvolt = <1605000>;
regulator-max-microvolt = <1995000>;
regulator-boot-on;
};
buck8: BUCK6 {
regulator-name = "buck6";
regulator-min-microvolt = <800000>;
regulator-max-microvolt = <1400000>;
};
ldo1: LDO1 {
regulator-name = "ldo1";
regulator-min-microvolt = <1600000>;
regulator-max-microvolt = <3300000>;
regulator-boot-on;
};
ldo2: LDO2 {
regulator-name = "ldo2";
regulator-min-microvolt = <800000>;
regulator-max-microvolt = <900000>;
regulator-boot-on;
};
ldo3: LDO3 {
regulator-name = "ldo3";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <3300000>;
};
ldo4: LDO4 {
regulator-name = "ldo4";
regulator-min-microvolt = <900000>;
regulator-max-microvolt = <1800000>;
};
ldo5: LDO5 {
regulator-name = "ldo5";
regulator-min-microvolt = <800000>;
regulator-max-microvolt = <3300000>;
};
ldo6: LDO6 {
regulator-name = "ldo6";
regulator-min-microvolt = <900000>;
regulator-max-microvolt = <1800000>;
};
};
};
};