1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/rtc/st,stm32-rtc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: STMicroelectronics STM32 Real Time Clock Bindings
maintainers:
- Gabriel Fernandez <gabriel.fernandez@st.com>
properties:
compatible:
enum:
- st,stm32-rtc
- st,stm32h7-rtc
- st,stm32mp1-rtc
reg:
maxItems: 1
clocks:
minItems: 1
maxItems: 2
clock-names:
items:
- const: pclk
- const: rtc_ck
interrupts:
maxItems: 1
st,syscfg:
$ref: "/schemas/types.yaml#/definitions/phandle-array"
items:
minItems: 3
maxItems: 3
description: |
Phandle/offset/mask triplet. The phandle to pwrcfg used to
access control register at offset, and change the dbp (Disable Backup
Protection) bit represented by the mask, mandatory to disable/enable backup
domain (RTC registers) write protection.
assigned-clocks:
description: |
override default rtc_ck parent clock reference to the rtc_ck clock entry
maxItems: 1
assigned-clock-parents:
description: |
override default rtc_ck parent clock phandle of the new parent clock of rtc_ck
maxItems: 1
allOf:
- if:
properties:
compatible:
contains:
const: st,stm32-rtc
then:
properties:
clocks:
minItems: 1
maxItems: 1
clock-names: false
required:
- st,syscfg
- if:
properties:
compatible:
contains:
const: st,stm32h7-rtc
then:
properties:
clocks:
minItems: 2
maxItems: 2
required:
- clock-names
- st,syscfg
- if:
properties:
compatible:
contains:
const: st,stm32mp1-rtc
then:
properties:
clocks:
minItems: 2
maxItems: 2
assigned-clocks: false
assigned-clock-parents: false
required:
- clock-names
required:
- compatible
- reg
- clocks
- interrupts
additionalProperties: false
examples:
- |
#include <dt-bindings/mfd/stm32f4-rcc.h>
#include <dt-bindings/clock/stm32fx-clock.h>
rtc@40002800 {
compatible = "st,stm32-rtc";
reg = <0x40002800 0x400>;
clocks = <&rcc 1 CLK_RTC>;
assigned-clocks = <&rcc 1 CLK_RTC>;
assigned-clock-parents = <&rcc 1 CLK_LSE>;
interrupt-parent = <&exti>;
interrupts = <17 1>;
st,syscfg = <&pwrcfg 0x00 0x100>;
};
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/clock/stm32mp1-clks.h>
rtc@5c004000 {
compatible = "st,stm32mp1-rtc";
reg = <0x5c004000 0x400>;
clocks = <&rcc RTCAPB>, <&rcc RTC>;
clock-names = "pclk", "rtc_ck";
interrupts = <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>;
};
...
|
