garinus

Hi,
after having performed some tests I managed to have the mcp2518fd working with Armbian and Orange PI zero.
In attachment there is a patch that works with the current version.
 
The driver is the same as in the main kernel version:
https://github.com/torvalds/linux/tree/master/drivers/net/can/spi/mcp251xfd
 
after compiling the kernel it is necessary to add the following custom overlay in /boot/overlay-user
/dts-v1/; /plugin/; / {         compatible = "allwinner,sun4i-a10", "allwinner,sun7i-a20", "allwinner,sun8i-h3", "allwinner,sun50i-a64", "allwinner,sun50i-h5";         fragment@0 {                 target-path = "/clocks";                 overlay {                         #address-cells = <1>;                         #size-cells = <1>;                         can0_osc_fixed: can0_osc_fixed {                                 compatible = "fixed-clock";                                 #clock-cells = <0>;                                 clock-frequency  = <20000000>;                         };                 };         };         fragment@1 {                 target = <&pio>;                 overlay {                         can0_pin_irq: can0_pin_irq {                                 pins = "PA10";                                 function = "irq";                                 bias-pull-up;                         };                 };         };         fragment@2 {                 target = <&spi1>;                 overlay {                         #address-cells = <1>;                         #size-cells = <0>;                         status = "okay";                         mcp2515 {                                 reg = <0>;                                 compatible = "microchip,mcp2518fd";                                 pinctrl-names = "default";                                 pinctrl-0 = <&can0_pin_irq>;                                 spi-max-frequency = <10000000>;                                 interrupt-parent = <&pio>;                                 interrupts = <0 10 2>; /* PA10 IRQ_TYPE_EDGE_FALLING */                                 clocks = <&can0_osc_fixed>;                                 status = "okay";                         };                 };         }; }; In my case the interrupt pin is on PA10 and the crystal on mcp is 20MHz, change them if necessary.

copile it with armbian-add-overlay, then after the reboot launch the following commands:
 ip link set can0 type can bitrate 500000
 ip link up can0
 
where 500000 is the bitrate of your canBus.
 
It is possible to test the connection with:
 cansend can0 123#1122334455667788
or
 candump can0
mcp2518fd.patch