ti,tcan4x5x (on spi bus)

Vendor: Texas Instruments

Description

Texas Instruments TCAN4x5x SPI CAN FD controller.

Example:
  &spi0 {
    tcan4x5x: can@0 {
      compatible = ti,tcan4x5x";
      reg = <0>;
      spi-max-frequency = <18000000>;
      clock-frequency = <40000000>;
      device-state-gpios = <&gpio0 0 GPIO_ACTIVE_LOW>;
      device-wake-gpios = <&gpio0 1 GPIO_ACTIVE_HIGH>;
      reset-gpios = <&gpio0 2 GPIO_ACTIVE_HIGH>;
      int-gpios = <&gpio0 3 GPIO_ACTIVE_LOW>;
      bosch,mram-cfg = <0x0 15 15 5 5 0 10 10>;
      sample-point = <875>;
      sample-point-data = <875>;
      bus-speed = <125000>;
      bus-speed-data = <1000000>;
      status = "okay";

      can-transceiver {
        max-bitrate = <8000000>;
      };
    };
  };

Properties

Top level properties

These property descriptions apply to “ti,tcan4x5x” nodes themselves. This page also describes child node properties in the following sections.

Node specific propertiesDeprecated node specific propertiesBase properties

Properties not inherited from the base binding file.

Name	Type	Details
clock-frequency	int	TCAN4x5x oscillator clock frequency in Hz (20MHz or 40MHz). This property is required. Legal values: 20000000, 40000000
device-state-gpios	phandle-array	GPIO connected to the TCAN4x5x nWKRQ output. This signal is active low.
device-wake-gpios	phandle-array	GPIO connected to the TCAN4x5x WAKE input. This signal is high-voltage, active high.
reset-gpios	phandle-array	GPIO connected to the TCAN4x5x RST input. This signal is active high.
int-gpios	phandle-array	GPIO connected to the TCAN4x5x nINT interrupt output. This signal is open-drain, active low. This property is required.
bosch,mram-cfg	array	Bosch M_CAN message RAM configuration. The cells in the array have the following format: <offset std-filter-elements ext-filter-elements rx-fifo0-elements rx-fifo1-elements rx-buffer-elements tx-event-fifo-elements tx-buffer-elements> The 'offset' is an address offset of the message RAM where the following elements start from. This is normally set to 0x0 when using a non-shared message RAM. The remaining cells specify how many elements are allocated for each filter type/FIFO/buffer. The Bosch M_CAN IP supports the following elements: 11-bit Filter 0-128 elements / 0-128 words 29-bit Filter 0-64 elements / 0-128 words Rx FIFO 0 0-64 elements / 0-1152 words Rx FIFO 1 0-64 elements / 0-1152 words Rx Buffers 0-64 elements / 0-1152 words Tx Event FIFO 0-32 elements / 0-64 words Tx Buffers 0-32 elements / 0-576 words This property is required.
bus-speed-data	int	Initial data phase bitrate in bit/s. This property is required.
sample-point-data	int	Initial data phase sample point in per mille (e.g. 875 equals 87.5%). This property is required unless the timing is specified using time quanta based properties (`sjw-data`, `prop-seg-data`, `phase-seg1-data`, and `phase-seg2-data`). If this property is present, the time quanta based timing properties are ignored.
tx-delay-comp-offset	int
bus-speed	int	Initial bitrate in bit/s. This property is required.
sample-point	int	Initial sample point in per mille (e.g. 875 equals 87.5%). This property is required unless the timing is specified using time quanta based properties (`sjw`, `prop-seg`, `phase-seg1`, and `phase-seg2`). If this property is present, the time quanta based timing properties 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>; };
spi-max-frequency	int	Maximum clock frequency of device's SPI interface in Hz This property is required.
duplex	int	Duplex mode, full or half. By default it's always full duplex thus 0 as this is, by far, the most common mode. Use the macros not the actual enum value, here is the concordance list (see dt-bindings/spi/spi.h) 0 SPI_FULL_DUPLEX 2048 SPI_HALF_DUPLEX Legal values: 0, 2048
frame-format	int	Motorola or TI frame format. By default it's always Motorola's, thus 0 as this is, by far, the most common format. Use the macros not the actual enum value, here is the concordance list (see dt-bindings/spi/spi.h) 0 SPI_FRAME_FORMAT_MOTOROLA 32768 SPI_FRAME_FORMAT_TI Legal values: 0, 32768
spi-cpol	boolean	SPI clock polarity which indicates the clock idle state. If it is used, the clock idle state is logic high; otherwise, low.
spi-cpha	boolean	SPI clock phase that indicates on which edge data is sampled. If it is used, data is sampled on the second edge; otherwise, on the first edge.
spi-hold-cs	boolean	In some cases, it is necessary for the master to manage SPI chip select under software control, so that multiple spi transactions can be performed without releasing it. A typical use case is variable length SPI packets where the first spi transaction reads the length and the second spi transaction reads length bytes.
supply-gpios	phandle-array	GPIO specifier that controls power to the device. This property should be provided when the device has a dedicated switch that controls power to the device. The supply state is entirely the responsibility of the device driver. Contrast with vin-supply.
vin-supply	phandle	Reference to the regulator that controls power to the device. The referenced devicetree node must have a regulator compatible. This property should be provided when device power is supplied by a shared regulator. The supply state is dependent on the request status of all devices fed by the regulator. Contrast with supply-gpios. If both properties are provided then the regulator must be requested before the supply GPIOS is set to an active state, and the supply GPIOS must be set to an inactive state before releasing the regulator.

Child node properties

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