xref: /freebsd-src/sys/contrib/device-tree/Bindings/net/can/st,stm32-bxcan.yaml (revision fac71e4e09885bb2afa3d984a0c239a52e1a7418)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/net/can/st,stm32-bxcan.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: STMicroelectronics bxCAN controller

description: STMicroelectronics BxCAN controller for CAN bus

maintainers:
  - Dario Binacchi <dario.binacchi@amarulasolutions.com>

allOf:
  - $ref: can-controller.yaml#

properties:
  compatible:
    enum:
      - st,stm32f4-bxcan

  st,can-primary:
    description:
      Primary mode of the bxCAN peripheral is only relevant if the chip has
      two CAN peripherals in dual CAN configuration. In that case they share
      some of the required logic.
      Not to be used if the peripheral is in single CAN configuration.
      To avoid misunderstandings, it should be noted that ST documentation
      uses the terms master instead of primary.
    type: boolean

  st,can-secondary:
    description:
      Secondary mode of the bxCAN peripheral is only relevant if the chip
      has two CAN peripherals in dual CAN configuration. In that case they
      share some of the required logic.
      Not to be used if the peripheral is in single CAN configuration.
      To avoid misunderstandings, it should be noted that ST documentation
      uses the terms slave instead of secondary.
    type: boolean

  reg:
    maxItems: 1

  interrupts:
    items:
      - description: transmit interrupt
      - description: FIFO 0 receive interrupt
      - description: FIFO 1 receive interrupt
      - description: status change error interrupt

  interrupt-names:
    items:
      - const: tx
      - const: rx0
      - const: rx1
      - const: sce

  resets:
    maxItems: 1

  clocks:
    maxItems: 1

  st,gcan:
    $ref: /schemas/types.yaml#/definitions/phandle-array
    description:
      The phandle to the gcan node which allows to access the 512-bytes
      SRAM memory shared by the two bxCAN cells (CAN1 primary and CAN2
      secondary) in dual CAN peripheral configuration.

required:
  - compatible
  - reg
  - interrupts
  - resets
  - clocks
  - st,gcan

additionalProperties: false

examples:
  - |
    #include <dt-bindings/clock/stm32fx-clock.h>
    #include <dt-bindings/mfd/stm32f4-rcc.h>

    can1: can@40006400 {
        compatible = "st,stm32f4-bxcan";
        reg = <0x40006400 0x200>;
        interrupts = <19>, <20>, <21>, <22>;
        interrupt-names = "tx", "rx0", "rx1", "sce";
        resets = <&rcc STM32F4_APB1_RESET(CAN1)>;
        clocks = <&rcc 0 STM32F4_APB1_CLOCK(CAN1)>;
        st,can-primary;
        st,gcan = <&gcan>;
    };