blob: 7e14e26676ec9216f610198fb7571ab0e28a558b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
MOXA ART DMA Controller
See dma.txt first
Required properties:
- compatible : Must be "moxa,moxart-dma"
- reg : Should contain registers location and length
- interrupts : Should contain an interrupt-specifier for the sole
interrupt generated by the device
- #dma-cells : Should be 1, a single cell holding a line request number
Example:
dma: dma@90500000 {
compatible = "moxa,moxart-dma";
reg = <0x90500080 0x40>;
interrupts = <24 0>;
#dma-cells = <1>;
};
Clients:
DMA clients connected to the MOXA ART DMA controller must use the format
described in the dma.txt file, using a two-cell specifier for each channel:
a phandle plus one integer cells.
The two cells in order are:
1. A phandle pointing to the DMA controller.
2. Peripheral identifier for the hardware handshaking interface.
Example:
Use specific request line passing from dma
For example, MMC request line is 5
mmc: mmc@98e00000 {
compatible = "moxa,moxart-mmc";
reg = <0x98e00000 0x5C>;
interrupts = <5 0>;
clocks = <&clk_apb>;
dmas = <&dma 5>,
<&dma 5>;
dma-names = "tx", "rx";
};
|
