这是我的配置，仅供参考
硬件连接：
V3S MCP2515
SPI_SCK -----> CLK
SPI_MOSI -----> SI
SPI_MISO -----> SO
SPI_CS -----> CS
UART2_TX-----> INT
5V -----> 5V
GND -----> GND
这里选用了UART2_TX引脚，也就是PB0引脚，作为模块的触发引脚。
我的模块用的是一个8M的晶振，所以在linux-zero-4.10.y/arch/arm/boot/dts/sun8i-v3s.dtsi文件里添加了一个8M的时钟（不知道是不是真的需要，反正是加上去了）
osc8M: osc8M_clk {
#clock-cells = <0>;
compatible = "fixed-clock";
clock-frequency = <8000000>;
clock-output-names = "osc8M";
};在linux-zero-4.10.y/arch/arm/boot/dts/sun8i-v3s-licheepi-zero.dts中添加设备节点
&spi0 {
status = "okay";
can0: can@1 {
compatible = "microchip,mcp2515";
reg = <0>;
clocks = <&osc8M>;
interrupt-parent = <&pio>;
interrupts = <1 0 IRQ_TYPE_LEVEL_LOW>; /* (PB0 */
vdd-supply = <®_vcc5v0>;
xceiver-supply = <®_vcc5v0>;
spi-max-frequency = <2000000>;
};
};在menuconfig中添加驱动
[*]Networking support --->
<*>CAN bus subsystem support --->
CAN Device Drivers --->
CAN SPI interfaces --->
<*>Microchip MCP251x SPI CAN controllers这样系统在启动时就会打印模块加载成功的信息
[ 0.770387] CAN device driver interface
[ 0.785880] mcp251x spi32766.0 can0: MCP2515 successfully initialized.配置一下之后can0也是能成功收到数据
root@licheepi:/home# ./ip link set can0 type can bitrate 500000 triple-sampling on
root@licheepi:/home# ifconfig can0 up
root@licheepi:/home# ifconfig
can0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
UP RUNNING NOARP MTU:16 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:10
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
usb0 Link encap:Ethernet HWaddr F2:84:B6:C6:77:AB
inet addr:192.168.2.3 Bcast:192.168.2.255 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
root@licheepi:/home# ./candump can0 &
root@licheepi:/home# interface = can0, family = 29, type = 3, proto = 1
<0x100> [8] 11 22 33 44 55 66 77 88
<0x100> [8] 11 22 33 44 55 66 77 88
<0x100> [8] 11 22 33 44 55 66 77 88
<0x100> [8] 11 22 33 44 55 66 77 88我用的TF卡启动，没用spi flash，spi就只用做mcp2515