can0 口

zhangx

（1） # ifconfig can0 down （2） # ip link set can0 up type can bitrate 250000RTNETLINK answers: No such device（3） # ip link set can0 type can bitrate 125000（4）# ifconfig can0 upifconfig: ioctl 8914: No such device # dmesg | grep can0[    0.634034] device: 'can0': device_add[    0.634268] PM: Adding info for No Bus:can0[   50.543579] mcp251x spi2.0 can0: bit-timing not yet defined[  232.717368] A link change request failed with some changes committed already. Interface can0 may have been left with an inconsistent configuration, please check.[  248.570996] rockchip-spi ff130000.spi: cr0 0x2c01, div 4[  248.571122] mcp251x spi2.0: read reg![  248.571218] mcp251x spi2.0: reg:0[  248.571384] mcp251x spi2.0: CANCTRL_REQOP_MASK224[  248.571450] mcp251x spi2.0: CANCTRL REQOP CONF:128[  248.571533] mcp251x spi2.0: hw reset[  248.571596] mcp251x spi2.0: hw reset fail ret:-19[  248.572031] rockchip-spi ff130000.spi: cr0 0x2c01, div 4


dts中can0为：
&spi2 {        status = "okay";        spi_wk2xxx@00{                status = "disabled";        };        mcp2515: can@00 {                status = "okay";                compatible = "microchip,mcp2515";                reg = <0x00>;                clocks = <&mcp251x_clk>;                interrupt-parent = <&gpio0>;                interrupts = <1 IRQ_TYPE_EDGE_FALLING>;                spi-max-frequency = <24000000>;                pinctrl-names = "default";                pinctrl-0 = <&can0_pins>;                poll_mode = <0>;                enable_dma = <1>;        };};


再次感谢，麻烦抽空回复，等待中，不胜感激。

zhangx

麻烦帮看一下， can0口打开时候，出现mcp251x spi2.0: hw reset fail ret:-19错误

xiaoning3486

你好，这个问题解决了吗？