zhangx 发表于 2020-7-13 10:16:16

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 A link change request failed with some changes committed already. Interface can0 may have been left with an inconsistent configuration, please check. rockchip-spi ff130000.spi: cr0 0x2c01, div 4 mcp251x spi2.0: read reg! mcp251x spi2.0: reg:0 mcp251x spi2.0: CANCTRL_REQOP_MASK224 mcp251x spi2.0: CANCTRL REQOP CONF:128 mcp251x spi2.0: hw reset mcp251x spi2.0: hw reset fail ret:-19 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 发表于 2020-7-13 10:47:07

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 发表于 2020-12-8 15:59:09

你好,这个问题解决了吗?
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