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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/regulator/richtek,rtq2208.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Richtek RTQ2208 SubPMIC Regulator
maintainers:
- Alina Yu <alina_yu@richtek.com>
description: |
RTQ2208 is a highly integrated power converter that offers functional safety dual
multi-configurable synchronous buck converters and two LDOs.
Bucks support "regulator-allowed-modes" and "regulator-mode". The former defines the permitted
switching operation in normal mode; the latter defines the operation in suspend to RAM mode.
No matter the RTQ2208 is configured to normal or suspend to RAM mode, there are two switching
operation modes for all buck rails, automatic power saving mode (Auto mode) and forced continuous
conduction mode (FCCM).
The definition of modes is in the datasheet which is available in below link
and their meaning is::
0 - Auto mode for power saving, which reducing the switching frequency at light load condition
to maintain high frequency.
1 - FCCM to meet the strict voltage regulation accuracy, which keeping constant switching frequency.
Datasheet will be available soon at
https://www.richtek.com/assets/Products
properties:
compatible:
enum:
- richtek,rtq2208
reg:
maxItems: 1
interrupts:
maxItems: 1
richtek,mtp-sel-high:
type: boolean
description:
vout register selection based on this boolean value.
false - Using DVS0 register setting to adjust vout
true - Using DVS1 register setting to adjust vout
regulators:
type: object
additionalProperties: false
patternProperties:
"^buck-[a-h]$":
type: object
$ref: regulator.yaml#
unevaluatedProperties: false
description:
description for buck-[a-h] regulator.
properties:
regulator-allowed-modes:
description:
two buck modes in different switching accuracy.
0 - Auto mode
1 - FCCM
items:
enum: [0, 1]
"^ldo[1-2]$":
type: object
$ref: regulator.yaml#
unevaluatedProperties: false
description:
regulator description for ldo[1-2].
properties:
richtek,fixed-microvolt:
description: |
This property can be used to set a fixed operating voltage that lies outside
the range of the regulator's adjustable mode.
required:
- compatible
- reg
- regulators
additionalProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/irq.h>
i2c {
#address-cells = <1>;
#size-cells = <0>;
pmic@10 {
compatible = "richtek,rtq2208";
reg = <0x10>;
interrupts-extended = <&gpio26 0 IRQ_TYPE_LEVEL_LOW>;
richtek,mtp-sel-high;
regulators {
buck-a {
regulator-min-microvolt = <400000>;
regulator-max-microvolt = <2050000>;
regulator-allowed-modes = <0 1>;
regulator-always-on;
regulator-state-mem {
regulator-on-in-suspend;
regulator-mode = <1>;
};
};
buck-b {
regulator-min-microvolt = <400000>;
regulator-max-microvolt = <2050000>;
regulator-allowed-modes = <0 1>;
regulator-always-on;
regulator-state-mem {
regulator-on-in-suspend;
regulator-mode = <1>;
};
};
buck-c {
regulator-min-microvolt = <400000>;
regulator-max-microvolt = <2050000>;
regulator-allowed-modes = <0 1>;
regulator-always-on;
regulator-state-mem {
regulator-on-in-suspend;
regulator-mode = <1>;
};
};
buck-d {
regulator-min-microvolt = <400000>;
regulator-max-microvolt = <2050000>;
regulator-allowed-modes = <0 1>;
regulator-always-on;
regulator-state-mem {
regulator-on-in-suspend;
regulator-mode = <1>;
};
};
buck-e {
regulator-min-microvolt = <400000>;
regulator-max-microvolt = <2050000>;
regulator-allowed-modes = <0 1>;
regulator-always-on;
regulator-state-mem {
regulator-on-in-suspend;
regulator-mode = <1>;
};
};
buck-f {
regulator-min-microvolt = <400000>;
regulator-max-microvolt = <2050000>;
regulator-allowed-modes = <0 1>;
regulator-always-on;
regulator-state-mem {
regulator-on-in-suspend;
regulator-mode = <1>;
};
};
buck-g {
regulator-min-microvolt = <400000>;
regulator-max-microvolt = <2050000>;
regulator-allowed-modes = <0 1>;
regulator-always-on;
regulator-state-mem {
regulator-on-in-suspend;
regulator-mode = <1>;
};
};
buck-h {
regulator-min-microvolt = <400000>;
regulator-max-microvolt = <2050000>;
regulator-allowed-modes = <0 1>;
regulator-always-on;
regulator-state-mem {
regulator-on-in-suspend;
regulator-mode = <1>;
};
};
ldo1 {
/* Fixed LDO VOUT */
richtek,fixed-microvolt = <1200000>;
regulator-min-microvolt = <1200000>;
regulator-max-microvolt = <1200000>;
regulator-always-on;
regulator-state-mem {
regulator-on-in-suspend;
};
};
ldo2 {
/* Adjustable LDO VOUT */
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
regulator-state-mem {
regulator-on-in-suspend;
};
};
};
};
};
|
