xref: /linux/Documentation/devicetree/bindings/mfd/st,stm32-timers.yaml (revision ee8287e068a3995b0f8001dd6931e221dfb7c530) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/mfd/st,stm32-timers.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: STMicroelectronics STM32 Timers
8
9description: |
10  This hardware block provides 3 types of timer along with PWM functionality:
11    - advanced-control timers consist of a 16-bit auto-reload counter driven
12      by a programmable prescaler, break input feature, PWM outputs and
13      complementary PWM outputs channels.
14    - general-purpose timers consist of a 16-bit or 32-bit auto-reload counter
15      driven by a programmable prescaler and PWM outputs.
16    - basic timers consist of a 16-bit auto-reload counter driven by a
17      programmable prescaler.
18
19maintainers:
20  - Fabrice Gasnier <fabrice.gasnier@foss.st.com>
21
22properties:
23  compatible:
24    const: st,stm32-timers
25
26  reg:
27    maxItems: 1
28
29  clocks:
30    maxItems: 1
31
32  clock-names:
33    items:
34      - const: int
35
36  resets:
37    maxItems: 1
38
39  dmas:
40    minItems: 1
41    maxItems: 7
42
43  dma-names:
44    items:
45      enum: [ ch1, ch2, ch3, ch4, up, trig, com ]
46    minItems: 1
47    maxItems: 7
48
49  interrupts:
50    oneOf:
51      - maxItems: 1
52      - maxItems: 4
53
54  interrupt-names:
55    oneOf:
56      - items:
57          - const: global
58      - items:
59          - const: brk
60          - const: up
61          - const: trg-com
62          - const: cc
63
64  "#address-cells":
65    const: 1
66
67  "#size-cells":
68    const: 0
69
70  access-controllers:
71    minItems: 1
72    maxItems: 2
73
74  pwm:
75    type: object
76    additionalProperties: false
77
78    properties:
79      compatible:
80        const: st,stm32-pwm
81
82      "#pwm-cells":
83        const: 3
84
85      st,breakinput:
86        description:
87          One or two <index level filter> to describe break input
88          configurations.
89        $ref: /schemas/types.yaml#/definitions/uint32-matrix
90        items:
91          items:
92            - description: |
93                "index" indicates on which break input (0 or 1) the
94                configuration should be applied.
95              enum: [0, 1]
96            - description: |
97                "level" gives the active level (0=low or 1=high) of the
98                input signal for this configuration
99              enum: [0, 1]
100            - description: |
101                "filter" gives the filtering value (up to 15) to be applied.
102              maximum: 15
103        minItems: 1
104        maxItems: 2
105
106    required:
107      - "#pwm-cells"
108      - compatible
109
110  counter:
111    type: object
112    additionalProperties: false
113
114    properties:
115      compatible:
116        const: st,stm32-timer-counter
117
118    required:
119      - compatible
120
121patternProperties:
122  "^timer@[0-9]+$":
123    type: object
124    additionalProperties: false
125
126    properties:
127      compatible:
128        enum:
129          - st,stm32-timer-trigger
130          - st,stm32h7-timer-trigger
131
132      reg:
133        description: Identify trigger hardware block.
134        items:
135          minimum: 0
136          maximum: 16
137
138    required:
139      - compatible
140      - reg
141
142required:
143  - compatible
144  - reg
145  - clocks
146  - clock-names
147
148additionalProperties: false
149
150examples:
151  - |
152    #include <dt-bindings/clock/stm32mp1-clks.h>
153    timers2: timer@40000000 {
154      #address-cells = <1>;
155      #size-cells = <0>;
156      compatible = "st,stm32-timers";
157      reg = <0x40000000 0x400>;
158      clocks = <&rcc TIM2_K>;
159      clock-names = "int";
160      dmas = <&dmamux1 18 0x400 0x1>,
161             <&dmamux1 19 0x400 0x1>,
162             <&dmamux1 20 0x400 0x1>,
163             <&dmamux1 21 0x400 0x1>,
164             <&dmamux1 22 0x400 0x1>;
165      dma-names = "ch1", "ch2", "ch3", "ch4", "up";
166      pwm {
167        compatible = "st,stm32-pwm";
168        #pwm-cells = <3>;
169        st,breakinput = <0 1 5>;
170      };
171      timer@1 {
172        compatible = "st,stm32-timer-trigger";
173        reg = <1>;
174      };
175      counter {
176        compatible = "st,stm32-timer-counter";
177      };
178    };
179
180...
181