tjh.dev
Linux kernel mirror (for testing)
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1# SPDX-License-Identifier: GPL-2.0
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/dma/sifive,fu540-c000-pdma.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: SiFive Unleashed Rev C000 Platform DMA
8
9maintainers:
10 - Green Wan <green.wan@sifive.com>
11 - Palmer Debbelt <palmer@sifive.com>
12 - Paul Walmsley <paul.walmsley@sifive.com>
13
14description: |
15 Platform DMA is a DMA engine of SiFive Unleashed. It supports 4
16 channels. Each channel has 2 interrupts. One is for DMA done and
17 the other is for DME error.
18
19 In different SoC, DMA could be attached to different IRQ line.
20 DT file need to be changed to meet the difference. For technical
21 doc,
22
23 https://static.dev.sifive.com/FU540-C000-v1.0.pdf
24
25allOf:
26 - $ref: dma-controller.yaml#
27
28properties:
29 compatible:
30 oneOf:
31 - items:
32 - const: microchip,pic64gx-pdma
33 - const: microchip,mpfs-pdma
34 - const: sifive,pdma0
35 - items:
36 - enum:
37 - microchip,mpfs-pdma
38 - sifive,fu540-c000-pdma
39 - const: sifive,pdma0
40 description:
41 Should be "sifive,<chip>-pdma" and "sifive,pdma<version>".
42 Supported compatible strings are -
43 "sifive,fu540-c000-pdma" for the SiFive PDMA v0 as integrated onto the
44 SiFive FU540 chip resp and "sifive,pdma0" for the SiFive PDMA v0 IP block
45 with no chip integration tweaks.
46
47 reg:
48 maxItems: 1
49
50 interrupts:
51 minItems: 1
52 maxItems: 8
53
54 dma-channels:
55 description: For backwards-compatibility, the default value is 4
56 minimum: 1
57 maximum: 4
58 default: 4
59
60 '#dma-cells':
61 const: 1
62
63required:
64 - compatible
65 - reg
66 - interrupts
67
68unevaluatedProperties: false
69
70examples:
71 - |
72 dma-controller@3000000 {
73 compatible = "sifive,fu540-c000-pdma", "sifive,pdma0";
74 reg = <0x3000000 0x8000>;
75 dma-channels = <4>;
76 interrupts = <23>, <24>, <25>, <26>, <27>, <28>, <29>, <30>;
77 #dma-cells = <1>;
78 };
79
80...