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标题: can0 口 [打印本页]

作者: zhangx 时间: 2020-7-13 10:16
标题: can0 口
（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。

作者: zhangx 时间: 2020-7-13 10:47
麻烦帮看一下， can0口打开时候，出现mcp251x spi2.0: hw reset fail ret:-19错误

作者: xiaoning3486 时间: 2020-12-8 15:59
你好，这个问题解决了吗？

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