mirror of https://gitee.com/openkylin/linux.git
54 lines
1.6 KiB
Plaintext
54 lines
1.6 KiB
Plaintext
Memory mapped Bosch CC770 and Intel AN82527 CAN controller
|
|
|
|
Note: The CC770 is a CAN controller from Bosch, which is 100%
|
|
compatible with the old AN82527 from Intel, but with "bugs" being fixed.
|
|
|
|
Required properties:
|
|
|
|
- compatible : should be "bosch,cc770" for the CC770 and "intc,82527"
|
|
for the AN82527.
|
|
|
|
- reg : should specify the chip select, address offset and size required
|
|
to map the registers of the controller. The size is usually 0x80.
|
|
|
|
- interrupts : property with a value describing the interrupt source
|
|
(number and sensitivity) required for the controller.
|
|
|
|
Optional properties:
|
|
|
|
- bosch,external-clock-frequency : frequency of the external oscillator
|
|
clock in Hz. Note that the internal clock frequency used by the
|
|
controller is half of that value. If not specified, a default
|
|
value of 16000000 (16 MHz) is used.
|
|
|
|
- bosch,clock-out-frequency : slock frequency in Hz on the CLKOUT pin.
|
|
If not specified or if the specified value is 0, the CLKOUT pin
|
|
will be disabled.
|
|
|
|
- bosch,slew-rate : slew rate of the CLKOUT signal. If not specified,
|
|
a resonable value will be calculated.
|
|
|
|
- bosch,disconnect-rx0-input : see data sheet.
|
|
|
|
- bosch,disconnect-rx1-input : see data sheet.
|
|
|
|
- bosch,disconnect-tx1-output : see data sheet.
|
|
|
|
- bosch,polarity-dominant : see data sheet.
|
|
|
|
- bosch,divide-memory-clock : see data sheet.
|
|
|
|
- bosch,iso-low-speed-mux : see data sheet.
|
|
|
|
For further information, please have a look to the CC770 or AN82527.
|
|
|
|
Examples:
|
|
|
|
can@3,100 {
|
|
compatible = "bosch,cc770";
|
|
reg = <3 0x100 0x80>;
|
|
interrupts = <2 0>;
|
|
interrupt-parent = <&mpic>;
|
|
bosch,external-clock-frequency = <16000000>;
|
|
};
|