tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/rtc/st,stm32-rtc.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: STMicroelectronics STM32 Real Time Clock Bindings
8
9maintainers:
10 - Gabriel Fernandez <gabriel.fernandez@st.com>
11
12properties:
13 compatible:
14 enum:
15 - st,stm32-rtc
16 - st,stm32h7-rtc
17 - st,stm32mp1-rtc
18
19 reg:
20 maxItems: 1
21
22 clocks:
23 minItems: 1
24 maxItems: 2
25
26 clock-names:
27 items:
28 - const: pclk
29 - const: rtc_ck
30
31 interrupts:
32 maxItems: 1
33
34 st,syscfg:
35 allOf:
36 - $ref: "/schemas/types.yaml#/definitions/phandle-array"
37 - items:
38 minItems: 3
39 maxItems: 3
40 description: |
41 Phandle/offset/mask triplet. The phandle to pwrcfg used to
42 access control register at offset, and change the dbp (Disable Backup
43 Protection) bit represented by the mask, mandatory to disable/enable backup
44 domain (RTC registers) write protection.
45
46 assigned-clocks:
47 description: |
48 override default rtc_ck parent clock reference to the rtc_ck clock entry
49 maxItems: 1
50
51 assigned-clock-parents:
52 description: |
53 override default rtc_ck parent clock phandle of the new parent clock of rtc_ck
54 maxItems: 1
55
56allOf:
57 - if:
58 properties:
59 compatible:
60 contains:
61 const: st,stm32-rtc
62
63 then:
64 properties:
65 clocks:
66 minItems: 1
67 maxItems: 1
68
69 clock-names: false
70
71 required:
72 - st,syscfg
73
74 - if:
75 properties:
76 compatible:
77 contains:
78 const: st,stm32h7-rtc
79
80 then:
81 properties:
82 clocks:
83 minItems: 2
84 maxItems: 2
85
86 required:
87 - clock-names
88 - st,syscfg
89
90 - if:
91 properties:
92 compatible:
93 contains:
94 const: st,stm32mp1-rtc
95
96 then:
97 properties:
98 clocks:
99 minItems: 2
100 maxItems: 2
101
102 assigned-clocks: false
103 assigned-clock-parents: false
104
105 required:
106 - clock-names
107
108required:
109 - compatible
110 - reg
111 - clocks
112 - interrupts
113
114additionalProperties: false
115
116examples:
117 - |
118 #include <dt-bindings/mfd/stm32f4-rcc.h>
119 #include <dt-bindings/clock/stm32fx-clock.h>
120 rtc@40002800 {
121 compatible = "st,stm32-rtc";
122 reg = <0x40002800 0x400>;
123 clocks = <&rcc 1 CLK_RTC>;
124 assigned-clocks = <&rcc 1 CLK_RTC>;
125 assigned-clock-parents = <&rcc 1 CLK_LSE>;
126 interrupt-parent = <&exti>;
127 interrupts = <17 1>;
128 st,syscfg = <&pwrcfg 0x00 0x100>;
129 };
130
131 #include <dt-bindings/interrupt-controller/arm-gic.h>
132 #include <dt-bindings/clock/stm32mp1-clks.h>
133 rtc@5c004000 {
134 compatible = "st,stm32mp1-rtc";
135 reg = <0x5c004000 0x400>;
136 clocks = <&rcc RTCAPB>, <&rcc RTC>;
137 clock-names = "pclk", "rtc_ck";
138 interrupts = <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>;
139 };
140
141...