atmel,sam0-can

Vendor: Atmel Corporation

Description

Specialization of Bosch m_can CAN-FD controller for Atmel SAM0

Properties

Top level properties

These property descriptions apply to “atmel,sam0-can” nodes themselves. This page also describes child node properties in the following sections.

Properties not inherited from the base binding file.

Name

Type

Details

divider

int

 
Clock divider of GLCK7 used by CAN as clock source

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

 
data phase bus speed in Baud/s

This property is required.

sjw-data

int

 
Resynchronization jump width for the data phase. (ISO11898-1:2015)

This property is required.

prop-seg-data

int

 
Time quantums of propagation segment for the data phase. (ISO11898-1:2015)

phase-seg1-data

int

 
Time quantums of phase buffer 1 segment for the data phase. (ISO11898-1:2015)

phase-seg2-data

int

 
Time quantums of phase buffer 2 segment for the data phase. (ISO11898-1:2015)

sample-point-data

int

 
Sample point in permille for the data phase. This param is required if segments are not given. If the sample point is given, the segments are ignored.

tx-delay-comp-offset

int

bus-speed

int

 
bus speed in Baud/s

This property is required.

sjw

int

 
Resynchronization jump width (ISO 11898-1)

This property is required.

prop-seg

int

 
Time quantums of propagation segment (ISO 11898-1)

phase-seg1

int

 
Time quantums of phase buffer 1 segment (ISO 11898-1)

phase-seg2

int

 
Time quantums of phase buffer 2 segment (ISO 11898-1)

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.

Child node properties

Name

Type

Details

max-bitrate

int

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

This property is required.