# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id:
http://devicetree.org/schemas/rtc/abracon,abx80x.yaml#
$schema:
http://devicetree.org/meta-schemas/core.yaml#
title: Abracon ABX80X I2C ultra low power RTC/Alarm chip
maintainers:
- linux-rtc@vger.kernel.org
properties:
compatible:
description:
The wildcard 'abracon,abx80x' may be used to support a mix
of different abracon rtc`s. In this case the driver
must perform auto-detection from ID register.
enum:
- abracon,abx80x
- abracon,ab0801
- abracon,ab0803
- abracon,ab0804
- abracon,ab0805
- abracon,ab1801
- abracon,ab1803
- abracon,ab1804
- abracon,ab1805
- microcrystal,rv1805
reg:
maxItems: 1
interrupts:
maxItems: 1
abracon,tc-diode:
description:
Trickle-charge diode type.
Required to enable charging backup battery.
Supported are 'standard' diodes with a 0.6V drop
and 'schottky' diodes with a 0.3V drop.
$ref: /schemas/types.yaml#/definitions/string
enum:
- standard
- schottky
abracon,tc-resistor:
description:
Trickle-charge resistor value in kOhm.
Required to enable charging backup battery.
$ref: /schemas/types.yaml#/definitions/uint32
enum: [0, 3, 6, 11]
dependentRequired:
abracon,tc-diode: ["abracon,tc-resistor"]
abracon,tc-resistor: ["abracon,tc-diode"]
required:
- compatible
- reg
allOf:
- $ref: rtc.yaml#
- if:
properties:
compatible:
not:
contains:
enum:
- abracon,abx80x
- abracon,ab0804
- abracon,ab1804
- abracon,ab0805
- abracon,ab1805
then:
properties:
abracon,tc-diode: false
abracon,tc-resistor: false
unevaluatedProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/irq.h>
i2c {
#address-cells = <1>;
#size-cells = <0>;
rtc@69 {
compatible = "abracon,abx80x";
reg = <0x69>;
abracon,tc-diode = "schottky";
abracon,tc-resistor = <3>;
interrupts = <44 IRQ_TYPE_EDGE_FALLING>;
};
};
