tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/dma/fsl-qdma.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: NXP Layerscape SoC qDMA Controller
8
9maintainers:
10 - Frank Li <Frank.Li@nxp.com>
11
12properties:
13 compatible:
14 oneOf:
15 - const: fsl,ls1021a-qdma
16 - items:
17 - enum:
18 - fsl,ls1028a-qdma
19 - fsl,ls1043a-qdma
20 - fsl,ls1046a-qdma
21 - const: fsl,ls1021a-qdma
22
23 reg:
24 items:
25 - description: Controller regs
26 - description: Status regs
27 - description: Block regs
28
29 interrupts:
30 minItems: 2
31 maxItems: 5
32
33 interrupt-names:
34 minItems: 2
35 items:
36 - const: qdma-error
37 - const: qdma-queue0
38 - const: qdma-queue1
39 - const: qdma-queue2
40 - const: qdma-queue3
41
42 dma-channels:
43 minimum: 1
44 maximum: 64
45
46 fsl,dma-queues:
47 $ref: /schemas/types.yaml#/definitions/uint32
48 description: Should contain number of queues supported.
49 minimum: 1
50 maximum: 4
51
52 block-number:
53 $ref: /schemas/types.yaml#/definitions/uint32
54 description: the virtual block number
55
56 block-offset:
57 $ref: /schemas/types.yaml#/definitions/uint32
58 description: the offset of different virtual block
59
60 status-sizes:
61 $ref: /schemas/types.yaml#/definitions/uint32
62 description: status queue size of per virtual block
63
64 queue-sizes:
65 $ref: /schemas/types.yaml#/definitions/uint32-array
66 description:
67 command queue size of per virtual block, the size number
68 based on queues
69
70 big-endian:
71 $ref: /schemas/types.yaml#/definitions/flag
72 description:
73 If present registers and hardware scatter/gather descriptors
74 of the qDMA are implemented in big endian mode, otherwise in little
75 mode.
76
77required:
78 - compatible
79 - reg
80 - interrupts
81 - interrupt-names
82 - fsl,dma-queues
83 - block-number
84 - block-offset
85 - status-sizes
86 - queue-sizes
87
88allOf:
89 - $ref: dma-controller.yaml#
90 - if:
91 properties:
92 compatible:
93 contains:
94 enum:
95 - fsl,ls1028a-qdma
96 - fsl,ls1043a-qdma
97 - fsl,ls1046a-qdma
98 then:
99 properties:
100 interrupts:
101 minItems: 5
102 interrupt-names:
103 minItems: 5
104 else:
105 properties:
106 interrupts:
107 maxItems: 3
108 interrupt-names:
109 maxItems: 3
110
111unevaluatedProperties: false
112
113examples:
114 - |
115 #include <dt-bindings/interrupt-controller/arm-gic.h>
116
117 dma-controller@8390000 {
118 compatible = "fsl,ls1021a-qdma";
119 reg = <0x8388000 0x1000>, /* Controller regs */
120 <0x8389000 0x1000>, /* Status regs */
121 <0x838a000 0x2000>; /* Block regs */
122 interrupts = <GIC_SPI 185 IRQ_TYPE_LEVEL_HIGH>,
123 <GIC_SPI 76 IRQ_TYPE_LEVEL_HIGH>,
124 <GIC_SPI 77 IRQ_TYPE_LEVEL_HIGH>;
125 interrupt-names = "qdma-error", "qdma-queue0", "qdma-queue1";
126 #dma-cells = <1>;
127 dma-channels = <8>;
128 block-number = <2>;
129 block-offset = <0x1000>;
130 status-sizes = <64>;
131 queue-sizes = <64 64>;
132 big-endian;
133 fsl,dma-queues = <2>;
134 };
135