xref: /linux/Documentation/devicetree/bindings/dma/fsl,edma.yaml (revision 4b132aacb0768ac1e652cf517097ea6f237214b9) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/dma/fsl,edma.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Freescale enhanced Direct Memory Access(eDMA) Controller
8
9description: |
10  The eDMA channels have multiplex capability by programmable
11  memory-mapped registers. channels are split into two groups, called
12  DMAMUX0 and DMAMUX1, specific DMA request source can only be multiplexed
13  by any channel of certain group, DMAMUX0 or DMAMUX1, but not both.
14
15maintainers:
16  - Peng Fan <peng.fan@nxp.com>
17
18properties:
19  compatible:
20    oneOf:
21      - enum:
22          - fsl,vf610-edma
23          - fsl,imx7ulp-edma
24          - fsl,imx8qm-edma
25          - fsl,imx8ulp-edma
26          - fsl,imx93-edma3
27          - fsl,imx93-edma4
28          - fsl,imx95-edma5
29      - items:
30          - const: fsl,ls1028a-edma
31          - const: fsl,vf610-edma
32
33  reg:
34    minItems: 1
35    maxItems: 3
36
37  interrupts:
38    minItems: 1
39    maxItems: 64
40
41  interrupt-names:
42    minItems: 1
43    maxItems: 64
44
45  "#dma-cells":
46    description: |
47      Specifies the number of cells needed to encode an DMA channel.
48
49      Encode for cells number 2:
50        cell 0: index of dma channel mux instance.
51        cell 1: peripheral dma request id.
52
53      Encode for cells number 3:
54        cell 0: peripheral dma request id.
55        cell 1: dma channel priority.
56        cell 2: bitmask, defined at include/dt-bindings/dma/fsl-edma.h
57    enum:
58      - 2
59      - 3
60
61  dma-channels:
62    minimum: 1
63    maximum: 64
64
65  clocks:
66    minItems: 1
67    maxItems: 33
68
69  clock-names:
70    minItems: 1
71    maxItems: 33
72
73  power-domains:
74    description:
75      The number of power domains matches the number of channels, arranged
76      in ascending order according to their associated DMA channels.
77    minItems: 1
78    maxItems: 64
79
80  big-endian:
81    description: |
82      If present registers and hardware scatter/gather descriptors of the
83      eDMA are implemented in big endian mode, otherwise in little mode.
84    type: boolean
85
86required:
87  - "#dma-cells"
88  - compatible
89  - reg
90  - interrupts
91  - dma-channels
92
93allOf:
94  - $ref: dma-controller.yaml#
95  - if:
96      properties:
97        compatible:
98          contains:
99            enum:
100              - fsl,imx8qm-edma
101              - fsl,imx93-edma3
102              - fsl,imx93-edma4
103              - fsl,imx95-edma5
104    then:
105      properties:
106        "#dma-cells":
107          const: 3
108        # It is not necessary to write the interrupt name for each channel.
109        # instead, you can simply maintain the sequential IRQ numbers as
110        # defined for the DMA channels.
111        interrupt-names: false
112        clock-names:
113          items:
114            - const: dma
115        clocks:
116          maxItems: 1
117
118  - if:
119      properties:
120        compatible:
121          contains:
122            const: fsl,vf610-edma
123    then:
124      properties:
125        clocks:
126          minItems: 2
127          maxItems: 2
128        clock-names:
129          items:
130            - const: dmamux0
131            - const: dmamux1
132        interrupts:
133          minItems: 2
134          maxItems: 2
135        interrupt-names:
136          items:
137            - const: edma-tx
138            - const: edma-err
139        reg:
140          minItems: 2
141          maxItems: 3
142        "#dma-cells":
143          const: 2
144        dma-channels:
145          const: 32
146
147  - if:
148      properties:
149        compatible:
150          contains:
151            const: fsl,imx7ulp-edma
152    then:
153      properties:
154        clock:
155          minItems: 2
156          maxItems: 2
157        clock-names:
158          items:
159            - const: dma
160            - const: dmamux0
161        interrupts:
162          minItems: 2
163          maxItems: 17
164        reg:
165          minItems: 2
166          maxItems: 2
167        "#dma-cells":
168          const: 2
169        dma-channels:
170          const: 32
171
172  - if:
173      properties:
174        compatible:
175          contains:
176            const: fsl,imx8ulp-edma
177    then:
178      properties:
179        clocks:
180          minItems: 33
181        clock-names:
182          minItems: 33
183          items:
184            oneOf:
185              - const: dma
186              - pattern: "^ch(0[0-9]|[1-2][0-9]|3[01])$"
187
188        interrupt-names: false
189        interrupts:
190          minItems: 32
191        "#dma-cells":
192          const: 3
193
194  - if:
195      properties:
196        compatible:
197          contains:
198            enum:
199              - fsl,vf610-edma
200              - fsl,imx7ulp-edma
201              - fsl,imx93-edma3
202              - fsl,imx93-edma4
203              - fsl,imx95-edma5
204              - fsl,imx8ulp-edma
205              - fsl,ls1028a-edma
206    then:
207      required:
208        - clocks
209
210  - if:
211      properties:
212        compatible:
213          contains:
214            enum:
215              - fsl,imx8qm-adma
216              - fsl,imx8qm-edma
217    then:
218      required:
219        - power-domains
220    else:
221      properties:
222        power-domains: false
223
224unevaluatedProperties: false
225
226examples:
227  - |
228    #include <dt-bindings/interrupt-controller/arm-gic.h>
229    #include <dt-bindings/clock/vf610-clock.h>
230
231    edma0: dma-controller@40018000 {
232      #dma-cells = <2>;
233      compatible = "fsl,vf610-edma";
234      reg = <0x40018000 0x2000>,
235            <0x40024000 0x1000>,
236            <0x40025000 0x1000>;
237      interrupts = <0 8 IRQ_TYPE_LEVEL_HIGH>,
238                   <0 9 IRQ_TYPE_LEVEL_HIGH>;
239      interrupt-names = "edma-tx", "edma-err";
240      dma-channels = <32>;
241      clock-names = "dmamux0", "dmamux1";
242      clocks = <&clks VF610_CLK_DMAMUX0>, <&clks VF610_CLK_DMAMUX1>;
243    };
244
245  - |
246    #include <dt-bindings/interrupt-controller/arm-gic.h>
247    #include <dt-bindings/clock/imx7ulp-clock.h>
248
249    edma1: dma-controller@40080000 {
250      #dma-cells = <2>;
251      compatible = "fsl,imx7ulp-edma";
252      reg = <0x40080000 0x2000>,
253            <0x40210000 0x1000>;
254      dma-channels = <32>;
255      interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>,
256                   <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>,
257                   <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>,
258                   <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>,
259                   <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>,
260                   <GIC_SPI 5 IRQ_TYPE_LEVEL_HIGH>,
261                   <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>,
262                   <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>,
263                   <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>,
264                   <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>,
265                   <GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>,
266                   <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>,
267                   <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>,
268                   <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>,
269                   <GIC_SPI 14 IRQ_TYPE_LEVEL_HIGH>,
270                   <GIC_SPI 15 IRQ_TYPE_LEVEL_HIGH>,
271                   /* last is eDMA2-ERR interrupt */
272                   <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
273       clock-names = "dma", "dmamux0";
274       clocks = <&pcc2 IMX7ULP_CLK_DMA1>, <&pcc2 IMX7ULP_CLK_DMA_MUX1>;
275    };
276
277  - |
278    #include <dt-bindings/interrupt-controller/arm-gic.h>
279    #include <dt-bindings/firmware/imx/rsrc.h>
280
281    dma-controller@5a9f0000 {
282      compatible = "fsl,imx8qm-edma";
283      reg = <0x5a9f0000 0x90000>;
284      #dma-cells = <3>;
285      dma-channels = <8>;
286      interrupts = <GIC_SPI 424 IRQ_TYPE_LEVEL_HIGH>,
287                   <GIC_SPI 425 IRQ_TYPE_LEVEL_HIGH>,
288                   <GIC_SPI 426 IRQ_TYPE_LEVEL_HIGH>,
289                   <GIC_SPI 427 IRQ_TYPE_LEVEL_HIGH>,
290                   <GIC_SPI 428 IRQ_TYPE_LEVEL_HIGH>,
291                   <GIC_SPI 429 IRQ_TYPE_LEVEL_HIGH>,
292                   <GIC_SPI 430 IRQ_TYPE_LEVEL_HIGH>,
293                   <GIC_SPI 431 IRQ_TYPE_LEVEL_HIGH>;
294      power-domains = <&pd IMX_SC_R_DMA_3_CH0>,
295                      <&pd IMX_SC_R_DMA_3_CH1>,
296                      <&pd IMX_SC_R_DMA_3_CH2>,
297                      <&pd IMX_SC_R_DMA_3_CH3>,
298                      <&pd IMX_SC_R_DMA_3_CH4>,
299                      <&pd IMX_SC_R_DMA_3_CH5>,
300                      <&pd IMX_SC_R_DMA_3_CH6>,
301                      <&pd IMX_SC_R_DMA_3_CH7>;
302    };
303