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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/clock/renesas,r9a08g045-vbattb.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Renesas Battery Backup Function (VBATTB)
description:
Renesas VBATTB is an always on powered module (backed by battery) which
controls the RTC clock (VBATTCLK), tamper detection logic and a small
general usage memory (128B).
maintainers:
- Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
properties:
compatible:
const: renesas,r9a08g045-vbattb
reg:
maxItems: 1
interrupts:
items:
- description: tamper detector interrupt
clocks:
items:
- description: VBATTB module clock
- description: RTC input clock (crystal or external clock device)
clock-names:
items:
- const: bclk
- const: rtx
'#clock-cells':
const: 1
power-domains:
maxItems: 1
resets:
items:
- description: VBATTB module reset
quartz-load-femtofarads:
description: load capacitance of the on board crystal
enum: [ 4000, 7000, 9000, 12500 ]
default: 4000
required:
- compatible
- reg
- interrupts
- clocks
- clock-names
- '#clock-cells'
- power-domains
- resets
additionalProperties: false
examples:
- |
#include <dt-bindings/clock/r9a08g045-cpg.h>
#include <dt-bindings/clock/renesas,r9a08g045-vbattb.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/interrupt-controller/irq.h>
clock-controller@1005c000 {
compatible = "renesas,r9a08g045-vbattb";
reg = <0x1005c000 0x1000>;
interrupts = <GIC_SPI 43 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&cpg CPG_MOD R9A08G045_VBAT_BCLK>, <&vbattb_xtal>;
clock-names = "bclk", "rtx";
assigned-clocks = <&vbattb VBATTB_MUX>;
assigned-clock-parents = <&vbattb VBATTB_XC>;
#clock-cells = <1>;
power-domains = <&cpg>;
resets = <&cpg R9A08G045_VBAT_BRESETN>;
quartz-load-femtofarads = <12500>;
};
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