dt-bindings: mfd: bd96801 PMIC core
ROHM BD96801 is a highly configurable automotive grade PMIC. Introduce DT bindings for the BD96801 core. Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com> Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Link: https://lore.kernel.org/r/9fa3f30dede2b85871a89b20fe1eb13549418489.1719473802.git.mazziesaccount@gmail.com Signed-off-by: Lee Jones <lee@kernel.org>
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Matti Vaittinen
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Lee Jones
Lee Jones
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fd6e053d23
commit
8b1a39362b
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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/mfd/rohm,bd96801-pmic.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: ROHM BD96801 Scalable Power Management Integrated Circuit
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maintainers:
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- Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
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description:
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BD96801 is an automotive grade single-chip power management IC.
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It integrates 4 buck converters and 3 LDOs with safety features like
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over-/under voltage and over current detection and a watchdog.
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properties:
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compatible:
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const: rohm,bd96801
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reg:
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maxItems: 1
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interrupts:
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description:
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The PMIC provides intb and errb IRQ lines. The errb IRQ line is used
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for fatal IRQs which will cause the PMIC to shut down power outputs.
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In many systems this will shut down the SoC contolling the PMIC and
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connecting/handling the errb can be omitted. However, there are cases
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where the SoC is not powered by the PMIC or has a short time backup
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energy to handle shutdown of critical hardware. In that case it may be
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useful to connect the errb and handle errb events.
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minItems: 1
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maxItems: 2
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interrupt-names:
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minItems: 1
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items:
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- enum: [intb, errb]
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- const: errb
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rohm,hw-timeout-ms:
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description:
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Watchdog timeout value(s). First walue is timeout limit. Second value is
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optional value for 'too early' watchdog ping if window timeout mode is
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to be used.
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minItems: 1
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maxItems: 2
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rohm,wdg-action:
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description:
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Whether the watchdog failure must turn off the regulator power outputs or
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just toggle the INTB line.
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enum:
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- prstb
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- intb-only
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timeout-sec:
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maxItems: 2
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regulators:
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$ref: /schemas/regulator/rohm,bd96801-regulator.yaml
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description:
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List of child nodes that specify the regulators.
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required:
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- compatible
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- reg
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- interrupts
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- interrupt-names
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- regulators
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/interrupt-controller/irq.h>
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#include <dt-bindings/leds/common.h>
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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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pmic: pmic@60 {
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reg = <0x60>;
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compatible = "rohm,bd96801";
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interrupt-parent = <&gpio1>;
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interrupts = <29 IRQ_TYPE_LEVEL_LOW>, <6 IRQ_TYPE_LEVEL_LOW>;
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interrupt-names = "intb", "errb";
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regulators {
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buck1 {
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regulator-name = "buck1";
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regulator-ramp-delay = <1250>;
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/* 0.5V min INITIAL - 150 mV tune */
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regulator-min-microvolt = <350000>;
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/* 3.3V + 150mV tune */
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regulator-max-microvolt = <3450000>;
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/* These can be set only when PMIC is in STBY */
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rohm,initial-voltage-microvolt = <500000>;
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regulator-ov-error-microvolt = <230000>;
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regulator-uv-error-microvolt = <230000>;
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regulator-temp-protection-kelvin = <1>;
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regulator-temp-warn-kelvin = <0>;
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};
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buck2 {
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regulator-name = "buck2";
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regulator-min-microvolt = <350000>;
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regulator-max-microvolt = <3450000>;
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rohm,initial-voltage-microvolt = <3000000>;
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regulator-ov-error-microvolt = <18000>;
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regulator-uv-error-microvolt = <18000>;
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regulator-temp-protection-kelvin = <1>;
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regulator-temp-warn-kelvin = <1>;
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};
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buck3 {
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regulator-name = "buck3";
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regulator-min-microvolt = <350000>;
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regulator-max-microvolt = <3450000>;
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rohm,initial-voltage-microvolt = <600000>;
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regulator-ov-warn-microvolt = <18000>;
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regulator-uv-warn-microvolt = <18000>;
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regulator-temp-protection-kelvin = <1>;
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regulator-temp-error-kelvin = <0>;
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};
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buck4 {
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regulator-name = "buck4";
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regulator-min-microvolt = <350000>;
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regulator-max-microvolt = <3450000>;
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rohm,initial-voltage-microvolt = <600000>;
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regulator-ov-warn-microvolt = <18000>;
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regulator-uv-warn-microvolt = <18000>;
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regulator-temp-protection-kelvin = <1>;
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regulator-temp-error-kelvin = <0>;
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};
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ldo5 {
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regulator-name = "ldo5";
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regulator-min-microvolt = <300000>;
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regulator-max-microvolt = <3300000>;
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rohm,initial-voltage-microvolt = <500000>;
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regulator-ov-error-microvolt = <36000>;
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regulator-uv-error-microvolt = <34000>;
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regulator-temp-protection-kelvin = <1>;
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regulator-temp-warn-kelvin = <0>;
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};
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ldo6 {
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regulator-name = "ldo6";
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regulator-min-microvolt = <300000>;
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regulator-max-microvolt = <3300000>;
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rohm,initial-voltage-microvolt = <300000>;
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regulator-ov-error-microvolt = <36000>;
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regulator-uv-error-microvolt = <34000>;
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regulator-temp-protection-kelvin = <1>;
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regulator-temp-warn-kelvin = <0>;
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};
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ldo7 {
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regulator-name = "ldo7";
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regulator-min-microvolt = <300000>;
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regulator-max-microvolt = <3300000>;
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rohm,initial-voltage-microvolt = <500000>;
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regulator-ov-error-microvolt = <36000>;
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regulator-uv-error-microvolt = <34000>;
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regulator-temp-protection-kelvin = <1>;
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regulator-temp-warn-kelvin = <0>;
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};
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};
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};
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};
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