xref: /linux/Documentation/devicetree/bindings/soc/microchip/atmel,at91rm9200-tcb.yaml (revision 5f60d5f6bbc12e782fac78110b0ee62698f3b576) 
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/soc/microchip/atmel,at91rm9200-tcb.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Atmel Timer Counter Block
8
9maintainers:
10  - Alexandre Belloni <alexandre.belloni@bootlin.com>
11
12description: |
13  The Atmel (now Microchip) SoCs have timers named Timer Counter Block. Each
14  timer has three channels with two counters each.
15
16properties:
17  compatible:
18    items:
19      - enum:
20          - atmel,at91rm9200-tcb
21          - atmel,at91sam9x5-tcb
22          - atmel,sama5d2-tcb
23      - const: simple-mfd
24      - const: syscon
25
26  reg:
27    maxItems: 1
28
29  interrupts:
30    description:
31      List of interrupts. One interrupt per TCB channel if available or one
32      interrupt for the TC block
33    minItems: 1
34    maxItems: 3
35
36  clock-names:
37    description:
38      List of clock names. Always includes t0_clk and slow clk. Also includes
39      t1_clk and t2_clk if a clock per channel is available.
40    minItems: 2
41    maxItems: 4
42
43  clocks:
44    minItems: 2
45    maxItems: 4
46
47  '#address-cells':
48    const: 1
49
50  '#size-cells':
51    const: 0
52
53patternProperties:
54  "^timer@[0-2]$":
55    description: The timer block channels that are used as timers or counters.
56    type: object
57    additionalProperties: false
58    properties:
59      compatible:
60        items:
61          - enum:
62              - atmel,tcb-timer
63              - atmel,tcb-pwm
64              - microchip,tcb-capture
65      reg:
66        description:
67          List of channels to use for this particular timer. In Microchip TCB capture
68          mode channels are registered as a counter devices, for the qdec mode TCB0's
69          channel <0> and <1> are required.
70
71        minItems: 1
72        maxItems: 3
73    required:
74      - compatible
75      - reg
76
77  "^pwm@[0-2]$":
78    description: The timer block channels that are used as PWMs.
79    $ref: /schemas/pwm/pwm.yaml#
80    type: object
81    properties:
82      compatible:
83        const: atmel,tcb-pwm
84      reg:
85        description:
86          TCB channel to use for this PWM.
87        enum: [ 0, 1, 2 ]
88
89      "#pwm-cells":
90        description:
91          The only third cell flag supported by this binding is
92          PWM_POLARITY_INVERTED.
93        const: 3
94
95    required:
96      - compatible
97      - reg
98      - "#pwm-cells"
99
100    additionalProperties: false
101
102
103allOf:
104  - if:
105      properties:
106        compatible:
107          contains:
108            const: atmel,sama5d2-tcb
109    then:
110      properties:
111        clocks:
112          minItems: 3
113          maxItems: 3
114        clock-names:
115          items:
116            - const: t0_clk
117            - const: gclk
118            - const: slow_clk
119    else:
120      properties:
121        clocks:
122          minItems: 2
123          maxItems: 4
124        clock-names:
125          oneOf:
126            - items:
127                - const: t0_clk
128                - const: slow_clk
129            - items:
130                - const: t0_clk
131                - const: t1_clk
132                - const: t2_clk
133                - const: slow_clk
134
135required:
136  - compatible
137  - reg
138  - interrupts
139  - clocks
140  - clock-names
141  - '#address-cells'
142  - '#size-cells'
143
144additionalProperties: false
145
146examples:
147  - |
148    /* One interrupt per TC block: */
149        tcb0: timer@fff7c000 {
150                compatible = "atmel,at91rm9200-tcb", "simple-mfd", "syscon";
151                #address-cells = <1>;
152                #size-cells = <0>;
153                reg = <0xfff7c000 0x100>;
154                interrupts = <18 4>;
155                clocks = <&tcb0_clk>, <&clk32k>;
156                clock-names = "t0_clk", "slow_clk";
157
158                timer@0 {
159                        compatible = "atmel,tcb-timer";
160                        reg = <0>, <1>;
161                };
162
163                timer@2 {
164                        compatible = "atmel,tcb-timer";
165                        reg = <2>;
166                };
167        };
168
169    /* One interrupt per TC channel in a TC block: */
170        tcb1: timer@fffdc000 {
171                compatible = "atmel,at91rm9200-tcb", "simple-mfd", "syscon";
172                #address-cells = <1>;
173                #size-cells = <0>;
174                reg = <0xfffdc000 0x100>;
175                interrupts = <26 4>, <27 4>, <28 4>;
176                clocks = <&tcb1_clk>, <&clk32k>;
177                clock-names = "t0_clk", "slow_clk";
178
179                timer@0 {
180                        compatible = "atmel,tcb-timer";
181                        reg = <0>;
182                };
183
184                timer@1 {
185                        compatible = "atmel,tcb-timer";
186                        reg = <1>;
187                };
188
189                pwm@2 {
190                        compatible = "atmel,tcb-pwm";
191                        reg = <2>;
192                        #pwm-cells = <3>;
193                };
194         };
195    /* TCB0 Capture with QDEC: */
196        timer@f800c000 {
197                compatible = "atmel,at91rm9200-tcb", "simple-mfd", "syscon";
198                #address-cells = <1>;
199                #size-cells = <0>;
200                reg = <0xfff7c000 0x100>;
201                interrupts = <18 4>;
202                clocks = <&tcb0_clk>, <&clk32k>;
203                clock-names = "t0_clk", "slow_clk";
204
205                timer@0 {
206                        compatible = "microchip,tcb-capture";
207                        reg = <0>, <1>;
208                };
209
210                timer@2 {
211                        compatible = "atmel,tcb-timer";
212                        reg = <2>;
213                };
214        };
215