xref: /freebsd/sys/contrib/device-tree/Bindings/dma/fsl,edma.yaml (revision ebacd8013fe5f7fdf9f6a5b286f6680dd2891036) 
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      - items:
25          - const: fsl,ls1028a-edma
26          - const: fsl,vf610-edma
27
28  reg:
29    minItems: 2
30    maxItems: 3
31
32  interrupts:
33    minItems: 2
34    maxItems: 17
35
36  interrupt-names:
37    minItems: 2
38    maxItems: 17
39
40  "#dma-cells":
41    const: 2
42
43  dma-channels:
44    const: 32
45
46  clocks:
47    maxItems: 2
48
49  clock-names:
50    maxItems: 2
51
52  big-endian:
53    description: |
54      If present registers and hardware scatter/gather descriptors of the
55      eDMA are implemented in big endian mode, otherwise in little mode.
56    type: boolean
57
58required:
59  - "#dma-cells"
60  - compatible
61  - reg
62  - interrupts
63  - clocks
64  - dma-channels
65
66allOf:
67  - $ref: "dma-controller.yaml#"
68  - if:
69      properties:
70        compatible:
71          contains:
72            const: fsl,vf610-edma
73    then:
74      properties:
75        clock-names:
76          items:
77            - const: dmamux0
78            - const: dmamux1
79        interrupts:
80          maxItems: 2
81        interrupt-names:
82          items:
83            - const: edma-tx
84            - const: edma-err
85        reg:
86          maxItems: 3
87
88  - if:
89      properties:
90        compatible:
91          contains:
92            const: fsl,imx7ulp-edma
93    then:
94      properties:
95        clock-names:
96          items:
97            - const: dma
98            - const: dmamux0
99        interrupts:
100          maxItems: 17
101        reg:
102          maxItems: 2
103
104unevaluatedProperties: false
105
106examples:
107  - |
108    #include <dt-bindings/interrupt-controller/arm-gic.h>
109    #include <dt-bindings/clock/vf610-clock.h>
110
111    edma0: dma-controller@40018000 {
112      #dma-cells = <2>;
113      compatible = "fsl,vf610-edma";
114      reg = <0x40018000 0x2000>,
115            <0x40024000 0x1000>,
116            <0x40025000 0x1000>;
117      interrupts = <0 8 IRQ_TYPE_LEVEL_HIGH>,
118                   <0 9 IRQ_TYPE_LEVEL_HIGH>;
119      interrupt-names = "edma-tx", "edma-err";
120      dma-channels = <32>;
121      clock-names = "dmamux0", "dmamux1";
122      clocks = <&clks VF610_CLK_DMAMUX0>, <&clks VF610_CLK_DMAMUX1>;
123    };
124
125  - |
126    #include <dt-bindings/interrupt-controller/arm-gic.h>
127    #include <dt-bindings/clock/imx7ulp-clock.h>
128
129    edma1: dma-controller@40080000 {
130      #dma-cells = <2>;
131      compatible = "fsl,imx7ulp-edma";
132      reg = <0x40080000 0x2000>,
133            <0x40210000 0x1000>;
134      dma-channels = <32>;
135      interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>,
136                   <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>,
137                   <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>,
138                   <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>,
139                   <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>,
140                   <GIC_SPI 5 IRQ_TYPE_LEVEL_HIGH>,
141                   <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>,
142                   <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>,
143                   <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>,
144                   <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>,
145                   <GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>,
146                   <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>,
147                   <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>,
148                   <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>,
149                   <GIC_SPI 14 IRQ_TYPE_LEVEL_HIGH>,
150                   <GIC_SPI 15 IRQ_TYPE_LEVEL_HIGH>,
151                   /* last is eDMA2-ERR interrupt */
152                   <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
153       clock-names = "dma", "dmamux0";
154       clocks = <&pcc2 IMX7ULP_CLK_DMA1>, <&pcc2 IMX7ULP_CLK_DMA_MUX1>;
155    };
156