tjh.dev
Linux kernel mirror (for testing)
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1Memory mapped SJA1000 CAN controller from NXP (formerly Philips)
2
3Required properties:
4
5- compatible : should be "nxp,sja1000".
6
7- reg : should specify the chip select, address offset and size required
8 to map the registers of the SJA1000. The size is usually 0x80.
9
10- interrupts: property with a value describing the interrupt source
11 (number and sensitivity) required for the SJA1000.
12
13Optional properties:
14
15- nxp,external-clock-frequency : Frequency of the external oscillator
16 clock in Hz. Note that the internal clock frequency used by the
17 SJA1000 is half of that value. If not specified, a default value
18 of 16000000 (16 MHz) is used.
19
20- nxp,tx-output-mode : operation mode of the TX output control logic:
21 <0x0> : bi-phase output mode
22 <0x1> : normal output mode (default)
23 <0x2> : test output mode
24 <0x3> : clock output mode
25
26- nxp,tx-output-config : TX output pin configuration:
27 <0x01> : TX0 invert
28 <0x02> : TX0 pull-down (default)
29 <0x04> : TX0 pull-up
30 <0x06> : TX0 push-pull
31 <0x08> : TX1 invert
32 <0x10> : TX1 pull-down
33 <0x20> : TX1 pull-up
34 <0x30> : TX1 push-pull
35
36- nxp,clock-out-frequency : clock frequency in Hz on the CLKOUT pin.
37 If not specified or if the specified value is 0, the CLKOUT pin
38 will be disabled.
39
40- nxp,no-comparator-bypass : Allows to disable the CAN input comperator.
41
42For further information, please have a look to the SJA1000 data sheet.
43
44Examples:
45
46can@3,100 {
47 compatible = "nxp,sja1000";
48 reg = <3 0x100 0x80>;
49 interrupts = <2 0>;
50 interrupt-parent = <&mpic>;
51 nxp,external-clock-frequency = <16000000>;
52};
53