xref: /linux/Documentation/devicetree/bindings/dma/qcom,bam-dma.yaml (revision 6f47c7ae8c7afaf9ad291d39f0d3974f191a7946) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/dma/qcom,bam-dma.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Qualcomm Technologies Inc BAM DMA controller
8
9maintainers:
10  - Andy Gross <agross@kernel.org>
11  - Bjorn Andersson <andersson@kernel.org>
12
13allOf:
14  - $ref: dma-controller.yaml#
15
16properties:
17  compatible:
18    oneOf:
19      - enum:
20          # APQ8064, IPQ8064 and MSM8960
21          - qcom,bam-v1.3.0
22          # MSM8974, APQ8074 and APQ8084
23          - qcom,bam-v1.4.0
24          # MSM8916, SDM630
25          - qcom,bam-v1.7.0
26      - items:
27          - enum:
28              # SDM845, SM6115, SM8150, SM8250 and QCM2290
29              - qcom,bam-v1.7.4
30          - const: qcom,bam-v1.7.0
31
32  clocks:
33    maxItems: 1
34
35  clock-names:
36    items:
37      - const: bam_clk
38
39  "#dma-cells":
40    const: 1
41
42  interrupts:
43    maxItems: 1
44
45  iommus:
46    minItems: 1
47    maxItems: 6
48
49  num-channels:
50    $ref: /schemas/types.yaml#/definitions/uint32
51    description:
52      Indicates supported number of DMA channels in a remotely controlled bam.
53
54  qcom,controlled-remotely:
55    type: boolean
56    description:
57      Indicates that the bam is controlled by remote processor i.e. execution
58      environment.
59
60  qcom,ee:
61    $ref: /schemas/types.yaml#/definitions/uint32
62    minimum: 0
63    maximum: 7
64    description:
65      Indicates the active Execution Environment identifier (0-7) used in the
66      secure world.
67
68  qcom,num-ees:
69    $ref: /schemas/types.yaml#/definitions/uint32
70    description:
71      Indicates supported number of Execution Environments in a remotely
72      controlled bam.
73
74  qcom,powered-remotely:
75    type: boolean
76    description:
77      Indicates that the bam is powered up by a remote processor but must be
78      initialized by the local processor.
79
80  reg:
81    maxItems: 1
82
83required:
84  - compatible
85  - "#dma-cells"
86  - interrupts
87  - qcom,ee
88  - reg
89
90anyOf:
91  - required:
92      - qcom,powered-remotely
93  - required:
94      - qcom,controlled-remotely
95  - required:
96      - clocks
97      - clock-names
98
99additionalProperties: false
100
101examples:
102  - |
103    #include <dt-bindings/interrupt-controller/arm-gic.h>
104    #include <dt-bindings/clock/qcom,gcc-msm8974.h>
105
106    dma-controller@f9944000 {
107        compatible = "qcom,bam-v1.4.0";
108        reg = <0xf9944000 0x19000>;
109        interrupts = <GIC_SPI 239 IRQ_TYPE_LEVEL_HIGH>;
110        clocks = <&gcc GCC_BLSP2_AHB_CLK>;
111        clock-names = "bam_clk";
112        #dma-cells = <1>;
113        qcom,ee = <0>;
114    };
115...
116