xref: /linux/Documentation/devicetree/bindings/mfd/st,stm32-timers.yaml (revision 71f6861cbf4537b4d890ab2328492c521adb00ef) 
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  pwm:
71    type: object
72    additionalProperties: false
73
74    properties:
75      compatible:
76        const: st,stm32-pwm
77
78      "#pwm-cells":
79        const: 3
80
81      st,breakinput:
82        description:
83          One or two <index level filter> to describe break input
84          configurations.
85        $ref: /schemas/types.yaml#/definitions/uint32-matrix
86        items:
87          items:
88            - description: |
89                "index" indicates on which break input (0 or 1) the
90                configuration should be applied.
91              enum: [0, 1]
92            - description: |
93                "level" gives the active level (0=low or 1=high) of the
94                input signal for this configuration
95              enum: [0, 1]
96            - description: |
97                "filter" gives the filtering value (up to 15) to be applied.
98              maximum: 15
99        minItems: 1
100        maxItems: 2
101
102    required:
103      - "#pwm-cells"
104      - compatible
105
106  counter:
107    type: object
108    additionalProperties: false
109
110    properties:
111      compatible:
112        const: st,stm32-timer-counter
113
114    required:
115      - compatible
116
117patternProperties:
118  "^timer@[0-9]+$":
119    type: object
120    additionalProperties: false
121
122    properties:
123      compatible:
124        enum:
125          - st,stm32-timer-trigger
126          - st,stm32h7-timer-trigger
127
128      reg:
129        description: Identify trigger hardware block.
130        items:
131          minimum: 0
132          maximum: 16
133
134    required:
135      - compatible
136      - reg
137
138required:
139  - compatible
140  - reg
141  - clocks
142  - clock-names
143
144additionalProperties: false
145
146examples:
147  - |
148    #include <dt-bindings/clock/stm32mp1-clks.h>
149    timers2: timer@40000000 {
150      #address-cells = <1>;
151      #size-cells = <0>;
152      compatible = "st,stm32-timers";
153      reg = <0x40000000 0x400>;
154      clocks = <&rcc TIM2_K>;
155      clock-names = "int";
156      dmas = <&dmamux1 18 0x400 0x1>,
157             <&dmamux1 19 0x400 0x1>,
158             <&dmamux1 20 0x400 0x1>,
159             <&dmamux1 21 0x400 0x1>,
160             <&dmamux1 22 0x400 0x1>;
161      dma-names = "ch1", "ch2", "ch3", "ch4", "up";
162      pwm {
163        compatible = "st,stm32-pwm";
164        #pwm-cells = <3>;
165        st,breakinput = <0 1 5>;
166      };
167      timer@1 {
168        compatible = "st,stm32-timer-trigger";
169        reg = <1>;
170      };
171      counter {
172        compatible = "st,stm32-timer-counter";
173      };
174    };
175
176...
177