1* Renesas "Type-AXI" NBPFAXI* DMA controllers
2
3* DMA controller
4
5Required properties
6
7- compatible:	must be one of
8		"renesas,nbpfaxi64dmac1b4"
9		"renesas,nbpfaxi64dmac1b8"
10		"renesas,nbpfaxi64dmac1b16"
11		"renesas,nbpfaxi64dmac4b4"
12		"renesas,nbpfaxi64dmac4b8"
13		"renesas,nbpfaxi64dmac4b16"
14		"renesas,nbpfaxi64dmac8b4"
15		"renesas,nbpfaxi64dmac8b8"
16		"renesas,nbpfaxi64dmac8b16"
17- #dma-cells:	must be 2: the first integer is a terminal number, to which this
18		slave is connected, the second one is flags. Flags is a bitmask
19		with the following bits defined:
20
21#define NBPF_SLAVE_RQ_HIGH	1
22#define NBPF_SLAVE_RQ_LOW	2
23#define NBPF_SLAVE_RQ_LEVEL	4
24
25Optional properties:
26- max-burst-mem-read:	limit burst size for memory reads
27  (DMA_MEM_TO_MEM/DMA_MEM_TO_DEV) to this value, specified in bytes, rather
28  than using the maximum burst size allowed by the hardware's buffer size.
29- max-burst-mem-write:	limit burst size for memory writes
30  (DMA_DEV_TO_MEM/DMA_MEM_TO_MEM) to this value, specified in bytes, rather
31  than using the maximum burst size allowed by the hardware's buffer size.
32  If both max-burst-mem-read and max-burst-mem-write are set, DMA_MEM_TO_MEM
33  will use the lower value.
34
35You can use dma-channels and dma-requests as described in dma.txt, although they
36won't be used, this information is derived from the compatibility string.
37
38Example:
39
40	dma: dma-controller@48000000 {
41		compatible = "renesas,nbpfaxi64dmac8b4";
42		reg = <0x48000000 0x400>;
43		interrupts = <0 12 0x4
44			      0 13 0x4
45			      0 14 0x4
46			      0 15 0x4
47			      0 16 0x4
48			      0 17 0x4
49			      0 18 0x4
50			      0 19 0x4>;
51		#dma-cells = <2>;
52		dma-channels = <8>;
53		dma-requests = <8>;
54	};
55
56* DMA client
57
58Required properties:
59
60dmas and dma-names are required, as described in dma.txt.
61
62Example:
63
64#include <dt-bindings/dma/nbpfaxi.h>
65
66...
67		dmas = <&dma 0 (NBPF_SLAVE_RQ_HIGH | NBPF_SLAVE_RQ_LEVEL)
68			&dma 1 (NBPF_SLAVE_RQ_HIGH | NBPF_SLAVE_RQ_LEVEL)>;
69		dma-names = "rx", "tx";
70