mirror of
https://github.com/torvalds/linux.git
synced 2024-12-25 12:21:37 +00:00
9093e72b39
Introduce a device tree binding document for the MPC512x DMA controller Signed-off-by: Alexander Popov <a13xp0p0v88@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
30 lines
1.0 KiB
Plaintext
30 lines
1.0 KiB
Plaintext
* Freescale MPC512x and MPC8308 DMA Controller
|
|
|
|
The DMA controller in Freescale MPC512x and MPC8308 SoCs can move
|
|
blocks of memory contents between memory and peripherals or
|
|
from memory to memory.
|
|
|
|
Refer to "Generic DMA Controller and DMA request bindings" in
|
|
the dma/dma.txt file for a more detailed description of binding.
|
|
|
|
Required properties:
|
|
- compatible: should be "fsl,mpc5121-dma" or "fsl,mpc8308-dma";
|
|
- reg: should contain the DMA controller registers location and length;
|
|
- interrupt for the DMA controller: syntax of interrupt client node
|
|
is described in interrupt-controller/interrupts.txt file.
|
|
- #dma-cells: the length of the DMA specifier, must be <1>.
|
|
Each channel of this DMA controller has a peripheral request line,
|
|
the assignment is fixed in hardware. This one cell
|
|
in dmas property of a client device represents the channel number.
|
|
|
|
Example:
|
|
|
|
dma0: dma@14000 {
|
|
compatible = "fsl,mpc5121-dma";
|
|
reg = <0x14000 0x1800>;
|
|
interrupts = <65 0x8>;
|
|
#dma-cells = <1>;
|
|
};
|
|
|
|
DMA clients must use the format described in dma/dma.txt file.
|