st,stm32h7-fdcan

Vendor: STMicroelectronics N.V.

Note

An implementation of a driver matching this compatible is available in drivers/can/can_stm32h7_fdcan.c.

Description

ST STM32H7 series FDCAN CAN FD controller

Properties

Top level properties

These property descriptions apply to “st,stm32h7-fdcan” nodes themselves. This page also describes child node properties in the following sections.

Node specific properties

Properties not inherited from the base binding file.

Name

Type

Details

clk-divider

int

Divides the kernel clock giving the time quanta clock that is fed to the FDCAN core
(FDCAN_CCU->CCFG CDIV register bits). Note that the divisor is common to all
'st,stm32h7-fdcan' instances.

Divide by 1 is the peripherals reset value and remains set unless this property is configured.

Legal values: 1, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30

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.

bitrate-data

int

Initial data phase bitrate in bit/s.  If this is unset, the initial data phase bitrate is set
to CONFIG_CAN_DEFAULT_BITRATE_DATA.

sample-point-data

int

Initial data phase sample point in per mille (e.g. 875 equals 87.5%).

If this is unset (or if it is set to 0), the initial sample point will default to 75.0% for
bitrates over 800 kbit/s, 80.0% for bitrates over 500 kbit/s, and 87.5% for all other
bitrates.

bitrate

int

Initial bitrate in bit/s. If this is unset, the initial bitrate is set to
CONFIG_CAN_DEFAULT_BITRATE.

sample-point

int

Initial sample point in per mille (e.g. 875 equals 87.5%).

If this is unset (or if it is set to 0), the initial sample point will default to 75.0% for
bitrates over 800 kbit/s, 80.0% for bitrates over 500 kbit/s, and 87.5% for all other
bitrates.

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 node specific properties

Deprecated properties not inherited from the base binding file.

Name

Type

Details

bus-speed-data

int

Deprecated. This property has been renamed to bitrate-data.

Initial data phase bitrate in bit/s.  If this is unset, the initial data phase bitrate is set
to CONFIG_CAN_DEFAULT_BITRATE_DATA.

bus-speed

int

Deprecated. This property has been renamed to bitrate.

Initial bitrate in bit/s. If this is unset, the initial bitrate is set to
CONFIG_CAN_DEFAULT_BITRATE.

Base properties

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 “st,stm32h7-fdcan” compatible.

Name

Type

Details

clocks

phandle-array

Clock gate information

This property is required.

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.

interrupt-names

string-array

name of each interrupt

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-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

power-domains

phandle-array

Power domain specifiers

power-domain-names

string-array

Provided names of power domain specifiers

#power-domain-cells

int

Number of cells in power-domains property

zephyr,deferred-init

boolean

Do not initialize device automatically on boot. Device should be manually
initialized using device_init().

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.

zephyr,pm-device-runtime-auto

boolean

Automatically configure the device for runtime power management after the
init function runs.

zephyr,disabling-power-states

phandles

List of power states that will disable this device power.

Child node properties

Name

Type

Details

min-bitrate

int

The minimum bitrate supported by the CAN transceiver in bits/s.

max-bitrate

int

The maximum bitrate supported by the CAN transceiver in bits/s.

This property is required.