dts/bindings/ospi/st,stm32-ospi.yaml

# Copyright (c) 2022 STMicroelectronics
# SPDX-License-Identifier: Apache-2.0

description: |
    STM32 OSPI device representation. Enabling a stm32 octospi node in a board
    description would typically requires this:

        &octospi {
            pinctrl-0 = <&octospi_clk_pe9 &octospi_ncs_pe10 &octospi_dqs_pe11
                         &octospi_io0_pe12 &octospi_io1_pe13
                         &octospi_io2_pe14 &octospi_io3_pe15
                         &octospi_io4_pe16 &octospi_io5_pe17
                         &octospi_io6_pe18 &octospi_io7_pe19>;

            dmas = <&dma1 5 41 0x10000>;
            dma-names = "tx_rx";

            status = "okay";
        };

compatible: "st,stm32-ospi"

include: [base.yaml, pinctrl-device.yaml]

bus: ospi

properties:
    reg:
      required: true

    interrupts:
      required: true

    pinctrl-0:
      required: true

    pinctrl-names:
      required: true

    dmas:
      description: |
        Optional DMA channel specifier, required for DMA transactions.
        For example dmas for TX/RX on OSPI
           dmas = <&dma1 5 41 0x10000>;

        With, in each cell of the dmas specifier:
        - &dma1: dma controller phandle
        - 5: channel number (0 to Max-Channel minus 1). From 0 to 15 on stm32u5x.
        - 41: slot number (request which could be given by the DMAMUX)
        - 0x10000: channel configuration (only for srce/dest data size, priority)

        Notes:
          - On series supporting DMAMUX, the DMA phandle should be provided
            but DMAMUX node should also be enabled in the DTS.
          - For channel configuration, only the config bits priority and
            periph/mem datasize are used. The periph/mem datasize must be equal,
            0 is a correct value.
           - There is no Fifo used by this DMA peripheral.

        For example dmas for TX/RX on OSPI
           dmas = <&dma1 5 41 0x10000>;

    dma-names:
      description: |
        DMA channel name. If DMA should be used, expected value is "tx_rx".

        For example
           dma-names = "tx_rx";