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nxp,flexcan¶

Vendor: NXP Semiconductors

Description¶

NXP FlexCAN controller

Example:
  flexcan0: can@40024000 {
    status = "okay";
    compatible = "nxp,flexcan";
    reg = <0x40024000 0x1000>;
    interrupts = <78 0>, <79 0>, <80 0>, <81 0>;
    interrupt-names = "warning", "error", "wake-up", "mb-0-15";
    clocks = <&scg KINETIS_SCG_BUS_CLK>;
    clk-source = <1>;
    sample-point = <875>;
    bus-speed = <125000>;
    pinctrl-0 = <&pinmux_flexcan0>;
    pinctrl-names = "default";

    can-transceiver {
      max-bitrate = <1000000>;
    };
  };

Properties¶

Top level properties¶

These property descriptions apply to “nxp,flexcan” nodes themselves. This page also describes child node properties in the following sections.

Properties not inherited from the base binding file.

Name	Type	Details
`clk-source`	`int`	CAN engine clock source This property is required.
`bus-speed`	`int`	bus speed in Baud/s This property is required.
`sample-point`	`int`	Sample point in permille. This param is required if segments are not given. If the sample point is given, the segments are ignored.
`phys`	`phandle`	Actively controlled CAN transceiver. Example: transceiver0: can-phy0 { compatible = "nxp,tja1040", "can-transceiver-gpio"; standby-gpios = <gpioa 0 GPIO_ACTIVE_HIGH>; max-bitrate = <1000000>; #phy-cells = <0>; }; &can0 { status = "okay"; phys = <&transceiver0>; };
`pinctrl-0`	`phandles`	Pin configuration/s for the first state. Content is specific to the selected pin controller driver implementation.
`pinctrl-1`	`phandles`	Pin configuration/s for the second state. See pinctrl-0.
`pinctrl-2`	`phandles`	Pin configuration/s for the third state. See pinctrl-0.
`pinctrl-3`	`phandles`	Pin configuration/s for the fourth state. See pinctrl-0.
`pinctrl-4`	`phandles`	Pin configuration/s for the fifth state. See pinctrl-0.
`pinctrl-names`	`string-array`	Names for the provided states. The number of names needs to match the number of states.

Deprecated properties not inherited from the base binding file.

Name	Type	Details
`sjw`	`int`	Initial time quanta of resynchronization jump width (ISO 11898-1). Deprecated in favor of automatic calculation of a suitable default SJW based on existing timing parameters. Default of 1 matches the default value previously used for all in-tree CAN controller devicetree instances. Applications can still manually set the SJW using the CAN timing APIs. Default value: `1`
`prop-seg`	`int`	Initial time quanta of propagation segment (ISO 11898-1). Deprecated in favor of setting advanced timing parameters from the application.
`phase-seg1`	`int`	Initial time quanta of phase buffer 1 segment (ISO 11898-1). Deprecated in favor of setting advanced timing parameters from the application.
`phase-seg2`	`int`	Initial time quanta of phase buffer 2 segment (ISO 11898-1). Deprecated in favor of setting advanced timing parameters from the application.

Properties inherited from the base binding file, which defines common properties that may be set on many nodes. Not all of these may apply to the “nxp,flexcan” compatible.

Name	Type	Details
`reg`	`array`	register space This property is required. See Important properties for more information.
`interrupts`	`array`	interrupts for device This property is required. See Important properties for more information.
`clocks`	`phandle-array`	Clock gate information This property is required.
`status`	`string`	indicates the operational status of a device Legal values: `'ok'`, `'okay'`, `'disabled'`, `'reserved'`, `'fail'`, `'fail-sss'` See Important properties for more information.
`compatible`	`string-array`	compatible strings This property is required. See Important properties for more information.
`reg-names`	`string-array`	name of each register space
`interrupts-extended`	`compound`	extended interrupt specifier for device
`interrupt-names`	`string-array`	name of each interrupt
`interrupt-parent`	`phandle`	phandle to interrupt controller node
`label`	`string`	Human readable string describing the device (used as device_get_binding() argument) See Important properties for more information. This property is deprecated.
`clock-names`	`string-array`	name of each clock
`#address-cells`	`int`	number of address cells in reg property
`#size-cells`	`int`	number of size cells in reg property
`dmas`	`phandle-array`	DMA channels specifiers
`dma-names`	`string-array`	Provided names of DMA channel specifiers
`io-channels`	`phandle-array`	IO channels specifiers
`io-channel-names`	`string-array`	Provided names of IO channel specifiers
`mboxes`	`phandle-array`	mailbox / IPM channels specifiers
`mbox-names`	`string-array`	Provided names of mailbox / IPM channel specifiers
`wakeup-source`	`boolean`	Property to identify that a device can be used as wake up source. When this property is provided a specific flag is set into the device that tells the system that the device is capable of wake up the system. Wake up capable devices are disabled (interruptions will not wake up the system) by default but they can be enabled at runtime if necessary.
`power-domain`	`phandle`	Power domain the device belongs to. The device will be notified when the power domain it belongs to is either suspended or resumed.
`zephyr,pm-device-runtime-auto`	`boolean`	Automatically configure the device for runtime power management after the init function runs.

Child node properties¶

Name	Type	Details
`max-bitrate`	`int`	The maximum bitrate supported by the CAN transceiver in bits/s. This property is required.