1 # SPDX-License-Identifier: (GPL-2.0-only OR BS
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/dma/brcm,bc
5 $schema: http://devicetree.org/meta-schemas/co
6
7 title: BCM2835 DMA controller
8
9 maintainers:
10 - Nicolas Saenz Julienne <nsaenz@kernel.org>
11
12 description:
13 The BCM2835 DMA controller has 16 channels i
14 13 channels have an associated IRQ. Some arb
15 VideoCore firmware (1,3,6,7 in the current f
16 0, 2 and 3 have special functionality and sh
17
18 allOf:
19 - $ref: dma-controller.yaml#
20
21 properties:
22 compatible:
23 const: brcm,bcm2835-dma
24
25 reg:
26 maxItems: 1
27
28 interrupts:
29 description:
30 Should contain the DMA interrupts associ
31 ascending order.
32 minItems: 1
33 maxItems: 16
34
35 interrupt-names:
36 minItems: 1
37 maxItems: 16
38
39 '#dma-cells':
40 description: The single cell represents th
41 const: 1
42
43 brcm,dma-channel-mask:
44 $ref: /schemas/types.yaml#/definitions/uin
45 description:
46 Bitmask of available DMA channels in asc
47 not reserved by firmware and are availab
48 kernel. i.e. first channel corresponds t
49
50 unevaluatedProperties: false
51
52 required:
53 - compatible
54 - reg
55 - interrupts
56 - "#dma-cells"
57 - brcm,dma-channel-mask
58
59 examples:
60 - |
61 dma-controller@7e007000 {
62 compatible = "brcm,bcm2835-dma";
63 reg = <0x7e007000 0xf00>;
64 interrupts = <1 16>,
65 <1 17>,
66 <1 18>,
67 <1 19>,
68 <1 20>,
69 <1 21>,
70 <1 22>,
71 <1 23>,
72 <1 24>,
73 <1 25>,
74 <1 26>,
75 /* dma channel 11-14 share
76 <1 27>,
77 <1 27>,
78 <1 27>,
79 <1 27>,
80 /* unused shared irq for al
81 <1 28>;
82 interrupt-names = "dma0",
83 "dma1",
84 "dma2",
85 "dma3",
86 "dma4",
87 "dma5",
88 "dma6",
89 "dma7",
90 "dma8",
91 "dma9",
92 "dma10",
93 "dma11",
94 "dma12",
95 "dma13",
96 "dma14",
97 "dma-shared-all";
98 #dma-cells = <1>;
99 brcm,dma-channel-mask = <0x7f35>;
100 };
101
102 ...
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.