Commit | Line | Data |
---|---|---|
94c7b6fc GL |
1 | * Renesas "Type-AXI" NBPFAXI* DMA controllers |
2 | ||
3 | * DMA controller | |
4 | ||
5 | Required 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 | ||
25 | Optional properties: | |
26 | ||
27 | You can use dma-channels and dma-requests as described in dma.txt, although they | |
28 | won't be used, this information is derived from the compatibility string. | |
29 | ||
30 | Example: | |
31 | ||
32 | dma: dma-controller@48000000 { | |
33 | compatible = "renesas,nbpfaxi64dmac8b4"; | |
34 | reg = <0x48000000 0x400>; | |
35 | interrupts = <0 12 0x4 | |
36 | 0 13 0x4 | |
37 | 0 14 0x4 | |
38 | 0 15 0x4 | |
39 | 0 16 0x4 | |
40 | 0 17 0x4 | |
41 | 0 18 0x4 | |
42 | 0 19 0x4>; | |
43 | #dma-cells = <2>; | |
44 | dma-channels = <8>; | |
45 | dma-requests = <8>; | |
46 | }; | |
47 | ||
48 | * DMA client | |
49 | ||
50 | Required properties: | |
51 | ||
52 | dmas and dma-names are required, as described in dma.txt. | |
53 | ||
54 | Example: | |
55 | ||
56 | #include <dt-bindings/dma/nbpfaxi.h> | |
57 | ||
58 | ... | |
59 | dmas = <&dma 0 (NBPF_SLAVE_RQ_HIGH | NBPF_SLAVE_RQ_LEVEL) | |
60 | &dma 1 (NBPF_SLAVE_RQ_HIGH | NBPF_SLAVE_RQ_LEVEL)>; | |
61 | dma-names = "rx", "tx"; |