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Add Richtek RTQ2208 SubPMIC support
Merge series from Alina Yu <alina_yu@richtek.com>: This patch series adds support for RTQ2208 SubPMIC regulators. The RTQ2208 is a multi-phase, programmable power management IC that integrate with dual multi-configurable, synchronous buck converters and two ldos. The bucks features wide output voltage range from 0.4V to 2.05V and the capability to configure the corresponding power stages.
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‎Documentation/devicetree/bindings/regulator/richtek,rtq2208.yaml‎

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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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$id: http://devicetree.org/schemas/regulator/richtek,rtq2208.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Richtek RTQ2208 SubPMIC Regulator
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maintainers:
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- Alina Yu <alina_yu@richtek.com>
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description: |
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RTQ2208 is a highly integrated power converter that offers functional safety dual
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multi-configurable synchronous buck converters and two LDOs.
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Bucks support "regulator-allowed-modes" and "regulator-mode". The former defines the permitted
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switching operation in normal mode; the latter defines the operation in suspend to RAM mode.
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No matter the RTQ2208 is configured to normal or suspend to RAM mode, there are two switching
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operation modes for all buck rails, automatic power saving mode (Auto mode) and forced continuous
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conduction mode (FCCM).
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The definition of modes is in the datasheet which is available in below link
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and their meaning is::
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0 - Auto mode for power saving, which reducing the switching frequency at light load condition
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to maintain high frequency.
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1 - FCCM to meet the strict voltage regulation accuracy, which keeping constant switching frequency.
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Datasheet will be available soon at
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https://www.richtek.com/assets/Products
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properties:
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compatible:
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enum:
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- richtek,rtq2208
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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richtek,mtp-sel-high:
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type: boolean
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description:
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vout register selection based on this boolean value.
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false - Using DVS0 register setting to adjust vout
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true - Using DVS1 register setting to adjust vout
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regulators:
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type: object
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additionalProperties: false
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patternProperties:
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"^buck-[a-h]$":
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type: object
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$ref: regulator.yaml#
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unevaluatedProperties: false
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description:
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description for buck-[a-h] regulator.
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properties:
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regulator-allowed-modes:
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description:
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two buck modes in different switching accuracy.
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0 - Auto mode
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1 - FCCM
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items:
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enum: [0, 1]
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"^ldo[1-2]$":
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type: object
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$ref: regulator.yaml#
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unevaluatedProperties: false
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description:
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regulator description for ldo[1-2].
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required:
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- compatible
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- reg
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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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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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pmic@10 {
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compatible = "richtek,rtq2208";
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reg = <0x10>;
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interrupts-extended = <&gpio26 0 IRQ_TYPE_LEVEL_LOW>;
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richtek,mtp-sel-high;
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regulators {
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buck-a {
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regulator-min-microvolt = <400000>;
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regulator-max-microvolt = <2050000>;
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regulator-allowed-modes = <0 1>;
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regulator-always-on;
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regulator-state-mem {
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regulator-on-in-suspend;
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regulator-mode = <1>;
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};
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};
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buck-b {
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regulator-min-microvolt = <400000>;
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regulator-max-microvolt = <2050000>;
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regulator-allowed-modes = <0 1>;
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regulator-always-on;
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regulator-state-mem {
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regulator-on-in-suspend;
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regulator-mode = <1>;
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};
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};
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buck-c {
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regulator-min-microvolt = <400000>;
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regulator-max-microvolt = <2050000>;
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regulator-allowed-modes = <0 1>;
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regulator-always-on;
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regulator-state-mem {
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regulator-on-in-suspend;
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regulator-mode = <1>;
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};
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};
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buck-d {
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regulator-min-microvolt = <400000>;
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regulator-max-microvolt = <2050000>;
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regulator-allowed-modes = <0 1>;
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regulator-always-on;
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regulator-state-mem {
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regulator-on-in-suspend;
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regulator-mode = <1>;
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};
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};
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buck-e {
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regulator-min-microvolt = <400000>;
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regulator-max-microvolt = <2050000>;
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regulator-allowed-modes = <0 1>;
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regulator-always-on;
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regulator-state-mem {
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regulator-on-in-suspend;
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regulator-mode = <1>;
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};
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};
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buck-f {
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regulator-min-microvolt = <400000>;
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regulator-max-microvolt = <2050000>;
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regulator-allowed-modes = <0 1>;
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regulator-always-on;
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regulator-state-mem {
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regulator-on-in-suspend;
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regulator-mode = <1>;
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};
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};
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buck-g {
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regulator-min-microvolt = <400000>;
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regulator-max-microvolt = <2050000>;
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regulator-allowed-modes = <0 1>;
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regulator-always-on;
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regulator-state-mem {
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regulator-on-in-suspend;
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regulator-mode = <1>;
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};
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};
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buck-h {
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regulator-min-microvolt = <400000>;
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regulator-max-microvolt = <2050000>;
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regulator-allowed-modes = <0 1>;
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regulator-always-on;
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regulator-state-mem {
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regulator-on-in-suspend;
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regulator-mode = <1>;
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};
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};
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ldo1 {
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regulator-min-microvolt = <1200000>;
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regulator-max-microvolt = <1200000>;
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regulator-always-on;
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regulator-state-mem {
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regulator-on-in-suspend;
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};
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};
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ldo2 {
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regulator-min-microvolt = <3300000>;
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regulator-max-microvolt = <3300000>;
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regulator-always-on;
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regulator-state-mem {
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regulator-on-in-suspend;
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};
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};
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};
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};
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};

‎drivers/regulator/Kconfig‎

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synchronous boost converters for PAVDD, and one synchronous NAVDD
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buck-boost. This device is suitable for automotive TFT-LCD panel.
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config REGULATOR_RTQ2208
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tristate "Richtek RTQ2208 SubPMIC Regulator"
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depends on I2C
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select REGMAP_I2C
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help
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This driver adds support for RTQ2208 SubPMIC regulators.
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The RTQ2208 is a multi-phase, programmable power management IC that
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integrate with dual multi-configurable, synchronous buck converters
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and two ldos. It features wide output voltage range from 0.4V to 2.05V
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and the capability to configure the corresponding power stages.
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config REGULATOR_S2MPA01
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tristate "Samsung S2MPA01 voltage regulator"
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depends on MFD_SEC_CORE || COMPILE_TEST

‎drivers/regulator/Makefile‎

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obj-$(CONFIG_REGULATOR_RTMV20) += rtmv20-regulator.o
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obj-$(CONFIG_REGULATOR_RTQ2134) += rtq2134-regulator.o
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obj-$(CONFIG_REGULATOR_RTQ6752) += rtq6752-regulator.o
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obj-$(CONFIG_REGULATOR_RTQ2208) += rtq2208-regulator.o
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obj-$(CONFIG_REGULATOR_S2MPA01) += s2mpa01.o
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obj-$(CONFIG_REGULATOR_S2MPS11) += s2mps11.o
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obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o

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