xref: /linux/Documentation/devicetree/bindings/rtc/atmel,at91sam9260-rtt.yaml (revision 1f20a5769446a1acae67ac9e63d07a594829a789) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2# Copyright (C) 2022 Microchip Technology, Inc. and its subsidiaries
3%YAML 1.2
4---
5$id: http://devicetree.org/schemas/rtc/atmel,at91sam9260-rtt.yaml#
6$schema: http://devicetree.org/meta-schemas/core.yaml#
7
8title: Atmel AT91 RTT
9
10allOf:
11  - $ref: rtc.yaml#
12
13maintainers:
14  - Alexandre Belloni <alexandre.belloni@bootlin.com>
15
16properties:
17  compatible:
18    oneOf:
19      - items:
20          - const: atmel,at91sam9260-rtt
21      - items:
22          - enum:
23              - microchip,sam9x60-rtt
24              - microchip,sam9x7-rtt
25          - const: atmel,at91sam9260-rtt
26      - items:
27          - const: microchip,sama7g5-rtt
28          - const: microchip,sam9x60-rtt
29          - const: atmel,at91sam9260-rtt
30
31  reg:
32    maxItems: 1
33
34  interrupts:
35    maxItems: 1
36
37  clocks:
38    maxItems: 1
39
40  atmel,rtt-rtc-time-reg:
41    $ref: /schemas/types.yaml#/definitions/phandle-array
42    items:
43      - items:
44          - description: Phandle to the GPBR node.
45          - description: Offset within the GPBR block.
46    description:
47      Should encode the GPBR register used to store the time base when the
48      RTT is used as an RTC. The first cell should point to the GPBR node
49      and the second one encodes the offset within the GPBR block (or in
50      other words, the GPBR register used to store the time base).
51
52required:
53  - compatible
54  - reg
55  - interrupts
56  - clocks
57  - atmel,rtt-rtc-time-reg
58
59unevaluatedProperties: false
60
61examples:
62  - |
63    #include <dt-bindings/interrupt-controller/irq.h>
64
65    rtc@fffffd20 {
66        compatible = "atmel,at91sam9260-rtt";
67        reg = <0xfffffd20 0x10>;
68        interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;
69        clocks = <&clk32k>;
70        atmel,rtt-rtc-time-reg = <&gpbr 0x0>;
71    };
72