tjh.dev
Linux kernel mirror (for testing)
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1# SPDX-License-Identifier: GPL-2.0
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/rtc/rtc.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: RTC Generic Binding
8
9maintainers:
10 - Alexandre Belloni <alexandre.belloni@bootlin.com>
11
12description: |
13 This document describes generic bindings which can be used to
14 describe Real Time Clock devices in a device tree.
15
16properties:
17 $nodename:
18 pattern: "^rtc(@.*|-[0-9a-f])*$"
19
20 aux-voltage-chargeable:
21 $ref: /schemas/types.yaml#/definitions/uint32
22 enum: [0, 1]
23 description: |
24 Tells whether the battery/supercap of the RTC (if any) is
25 chargeable or not:
26 0: not chargeable
27 1: chargeable
28
29 quartz-load-femtofarads:
30 $ref: /schemas/types.yaml#/definitions/uint32
31 description:
32 The capacitive load of the quartz(x-tal), expressed in femto
33 Farad (fF). The default value shall be listed (if optional),
34 and likewise all valid values.
35
36 start-year:
37 $ref: /schemas/types.yaml#/definitions/uint32
38 description:
39 If provided, the default hardware range supported by the RTC is
40 shifted so the first usable year is the specified one.
41
42 trickle-diode-disable:
43 $ref: /schemas/types.yaml#/definitions/flag
44 description:
45 Do not use internal trickle charger diode. Should be given if
46 internal trickle charger diode should be disabled.
47 deprecated: true
48
49 trickle-resistor-ohms:
50 $ref: /schemas/types.yaml#/definitions/uint32
51 description:
52 Selected resistor for trickle charger. Should be given
53 if trickle charger should be enabled.
54
55 trickle-voltage-millivolt:
56 description:
57 Selected voltage for trickle charger. Should be given
58 if trickle charger should be enabled and the trickle voltage is different
59 from the RTC main power supply.
60
61 wakeup-source:
62 $ref: /schemas/types.yaml#/definitions/flag
63 description:
64 Enables wake up of host system on alarm.
65
66 reset-source:
67 $ref: /schemas/types.yaml#/definitions/flag
68 description:
69 The RTC is able to reset the machine.
70
71additionalProperties: true
72
73...