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
141
|
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/mfd/st,stm32-lptimer.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: STMicroelectronics STM32 Low-Power Timers bindings
description: |
The STM32 Low-Power Timer (LPTIM) is a 16-bit timer that provides several
functions
- PWM output (with programmable prescaler, configurable polarity)
- Trigger source for STM32 ADC/DAC (LPTIM_OUT)
- Several counter modes:
- quadrature encoder to detect angular position and direction of rotary
elements, from IN1 and IN2 input signals.
- simple counter from IN1 input signal.
maintainers:
- Fabrice Gasnier <fabrice.gasnier@foss.st.com>
properties:
compatible:
const: st,stm32-lptimer
reg:
maxItems: 1
clocks:
maxItems: 1
clock-names:
items:
- const: mux
interrupts:
maxItems: 1
"#address-cells":
const: 1
"#size-cells":
const: 0
wakeup-source: true
pwm:
type: object
properties:
compatible:
const: st,stm32-pwm-lp
"#pwm-cells":
const: 3
required:
- "#pwm-cells"
- compatible
counter:
type: object
properties:
compatible:
const: st,stm32-lptimer-counter
required:
- compatible
timer:
type: object
properties:
compatible:
const: st,stm32-lptimer-timer
required:
- compatible
patternProperties:
"^trigger@[0-9]+$":
type: object
properties:
compatible:
const: st,stm32-lptimer-trigger
reg:
description: Identify trigger hardware block.
items:
minimum: 0
maximum: 2
required:
- compatible
- reg
required:
- "#address-cells"
- "#size-cells"
- compatible
- reg
- clocks
- clock-names
additionalProperties: false
examples:
- |
#include <dt-bindings/clock/stm32mp1-clks.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
timer@40002400 {
compatible = "st,stm32-lptimer";
reg = <0x40002400 0x400>;
clocks = <&timer_clk>;
clock-names = "mux";
interrupts-extended = <&exti 47 IRQ_TYPE_LEVEL_HIGH>;
#address-cells = <1>;
#size-cells = <0>;
pwm {
compatible = "st,stm32-pwm-lp";
#pwm-cells = <3>;
};
trigger@0 {
compatible = "st,stm32-lptimer-trigger";
reg = <0>;
};
counter {
compatible = "st,stm32-lptimer-counter";
};
timer {
compatible = "st,stm32-lptimer-timer";
};
};
...
|
