dts/bindings/dma/microchip,xec-dmac.yaml

description: Microchip XEC DMA controller

compatible: "microchip,xec-dmac"

include: dma-controller.yaml

properties:
  reg:
    required: true

  interrupts:
    required: true

  pcrs:
    type: array
    required: true
    description: PCR register index and bit position

  girqs:
    type: array
    required: true
    description: Encoded interrupt information

  aggregated-girq:
    type: phandle
    description: |
      If DMA driver uses aggregated interrupt mode
      provide the handle to the GIRQ.

  "#dma-cells":
    const: 2

  "pcr-cells":
    type: int
    const: 2

  "girq-cells":
    type: int
    const: 2

# #dma-cells : Must be <2>.
# The 1st cell specifies the DMAC channel to be used for the data transfer.
#   This channel should be unique between all peripherals that are using the
#   DMAC instance.
# The 2nd cell defines the peripheral trigger which is the source of the transfer.
#   For details on trigger selection and trigger modes, refer to
#   "Transfer Triggers and Actions".
#   See the SoC's reference manual for all the supported request sources.
#
# Example of devicetree dma channel configuration:
#
# &sercom3 {
#     /* Configure DMA channels for async operation */
#     dmas = <&dmac 10 7>, <&dmac 11 8>;
#     dma-names = "rx", "tx";
# };
#
# In above fragment 10 and 11 represents the different channels used to
# transfer data between peripheral and ram. The numbers 7/8 are, for instance,
# uart_rx/tx peripheral trigger for sercom3.
dma-cells:
  - channel
  - trigsrc

pcr-cells:
  - regidx
  - bitpos

girq-cells:
  - girqno
  - girqpos