Kernel-4.18.0-80.el8_sja1000

Memory mapped SJA1000 CAN controller from NXP (formerly Philips)

Required properties:

• compatible : should be one of “nxp,sja1000”, “technologic,sja1000”.

• reg : should specify the chip select, address offset and size required
  to map the registers of the SJA1000. The size is usually 0x80.

• interrupts: property with a value describing the interrupt source
  (number and sensitivity) required for the SJA1000.

Optional properties:

• reg-io-width : Specify the size (in bytes) of the IO accesses that
  should be performed on the device. Valid value is 1, 2 or 4.
  This property is ignored for technologic version.
  Default to 1 (8 bits).

• nxp,external-clock-frequency : Frequency of the external oscillator
  clock in Hz. Note that the internal clock frequency used by the
  SJA1000 is half of that value. If not specified, a default value
  of 16000000 (16 MHz) is used.

• nxp,tx-output-mode : operation mode of the TX output control logic:
  <0x0> : bi-phase output mode
  <0x1> : normal output mode (default)
  <0x2> : test output mode
  <0x3> : clock output mode

• nxp,tx-output-config : TX output pin configuration:
  <0x01> : TX0 invert
  <0x02> : TX0 pull-down (default)
  <0x04> : TX0 pull-up
  <0x06> : TX0 push-pull
  <0x08> : TX1 invert
  <0x10> : TX1 pull-down
  <0x20> : TX1 pull-up
  <0x30> : TX1 push-pull

• nxp,clock-out-frequency : clock frequency in Hz on the CLKOUT pin.
  If not specified or if the specified value is 0, the CLKOUT pin
  will be disabled.

• nxp,no-comparator-bypass : Allows to disable the CAN input comparator.

For further information, please have a look to the SJA1000 data sheet.

Examples:

can@3,100 {
compatible = “nxp,sja1000”;
reg = <3 0x100 0x80>;
interrupts = <2 0>;
interrupt-parent = <&mpic>;
nxp,external-clock-frequency = <16000000>;
};