tjh.dev
Linux kernel mirror (for testing)
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1Memory mapped Bosch CC770 and Intel AN82527 CAN controller
2
3Note: The CC770 is a CAN controller from Bosch, which is 100%
4compatible with the old AN82527 from Intel, but with "bugs" being fixed.
5
6Required properties:
7
8- compatible : should be "bosch,cc770" for the CC770 and "intc,82527"
9 for the AN82527.
10
11- reg : should specify the chip select, address offset and size required
12 to map the registers of the controller. The size is usually 0x80.
13
14- interrupts : property with a value describing the interrupt source
15 (number and sensitivity) required for the controller.
16
17Optional properties:
18
19- bosch,external-clock-frequency : frequency of the external oscillator
20 clock in Hz. Note that the internal clock frequency used by the
21 controller is half of that value. If not specified, a default
22 value of 16000000 (16 MHz) is used.
23
24- bosch,clock-out-frequency : slock frequency in Hz on the CLKOUT pin.
25 If not specified or if the specified value is 0, the CLKOUT pin
26 will be disabled.
27
28- bosch,slew-rate : slew rate of the CLKOUT signal. If not specified,
29 a resonable value will be calculated.
30
31- bosch,disconnect-rx0-input : see data sheet.
32
33- bosch,disconnect-rx1-input : see data sheet.
34
35- bosch,disconnect-tx1-output : see data sheet.
36
37- bosch,polarity-dominant : see data sheet.
38
39- bosch,divide-memory-clock : see data sheet.
40
41- bosch,iso-low-speed-mux : see data sheet.
42
43For further information, please have a look to the CC770 or AN82527.
44
45Examples:
46
47can@3,100 {
48 compatible = "bosch,cc770";
49 reg = <3 0x100 0x80>;
50 interrupts = <2 0>;
51 interrupt-parent = <&mpic>;
52 bosch,external-clock-frequency = <16000000>;
53};