Merge branch 'for-4.5/for-jens' of git://git.kernel.org/pub/scm/linux/kernel/git...
[sfrench/cifs-2.6.git] / Documentation / devicetree / bindings / dma / lpc1850-dmamux.txt
1 NXP LPC18xx/43xx DMA MUX (DMA request router)
2
3 Required properties:
4 - compatible:   "nxp,lpc1850-dmamux"
5 - reg:          Memory map for accessing module
6 - #dma-cells:   Should be set to <3>.
7                 * 1st cell contain the master dma request signal
8                 * 2nd cell contain the mux value (0-3) for the peripheral
9                 * 3rd cell contain either 1 or 2 depending on the AHB
10                   master used.
11 - dma-requests: Number of DMA requests for the mux
12 - dma-masters:  phandle pointing to the DMA controller
13
14 The DMA controller node need to have the following poroperties:
15 - dma-requests: Number of DMA requests the controller can handle
16
17 Example:
18
19 dmac: dma@40002000 {
20         compatible = "nxp,lpc1850-gpdma", "arm,pl080", "arm,primecell";
21         arm,primecell-periphid = <0x00041080>;
22         reg = <0x40002000 0x1000>;
23         interrupts = <2>;
24         clocks = <&ccu1 CLK_CPU_DMA>;
25         clock-names = "apb_pclk";
26         #dma-cells = <2>;
27         dma-channels = <8>;
28         dma-requests = <16>;
29         lli-bus-interface-ahb1;
30         lli-bus-interface-ahb2;
31         mem-bus-interface-ahb1;
32         mem-bus-interface-ahb2;
33         memcpy-burst-size = <256>;
34         memcpy-bus-width = <32>;
35 };
36
37 dmamux: dma-mux {
38         compatible = "nxp,lpc1850-dmamux";
39         #dma-cells = <3>;
40         dma-requests = <64>;
41         dma-masters = <&dmac>;
42 };
43
44 uart0: serial@40081000 {
45         compatible = "nxp,lpc1850-uart", "ns16550a";
46         reg = <0x40081000 0x1000>;
47         reg-shift = <2>;
48         interrupts = <24>;
49         clocks = <&ccu2 CLK_APB0_UART0>, <&ccu1 CLK_CPU_UART0>;
50         clock-names = "uartclk", "reg";
51         dmas = <&dmamux 1 1 2
52                 &dmamux 2 1 2>;
53         dma-names = "tx", "rx";
54 };