Buildroot and CAN (can0/dcan0)

[CobaltMonte]

Hi,

Has anyone been able to get the can0 interface to work with buildroot? I seem to be almost there and I may be missing something.

Boot log:

[ 1.396962] c_can_platform 481cc000.can: c_can_platform device registered (regs=fa1cc000, irq=34) [ 1.670150] can: controller area network core (rev 20170425 abi 9) [ 1.681566] can: raw protocol (rev 20170425) [ 1.686172] can: broadcast manager protocol (rev 20170425 t) [ 1.692206] can: netlink gateway (rev 20170425) max_hops=1

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[    1.396962] c_can_platform 481cc000.can: c_can_platform device registered (regs=fa1cc000, irq=34) [    1.670150] can: controller area network core (rev 20170425 abi 9) [    1.681566] can: raw protocol (rev 20170425) [    1.686172] can: broadcast manager protocol (rev 20170425 t) [    1.692206] can: netlink gateway (rev 20170425) max_hops=1

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Here is a synopsis of the system:

Linux 4.14.18

linux.config:

CONFIG_CAN_DEV=y CONFIG_CAN_CALC_BITTIMING=y CONFIG_CAN=y CONFIG_CAN_RAW=y CONFIG_CAN_BCM=y CONFIG_CAN_GW=y CONFIG_CAN_DEBUG_DEVICES=y

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CONFIG_CAN_DEV=y CONFIG_CAN_CALC_BITTIMING=y CONFIG_CAN=y CONFIG_CAN_RAW=y CONFIG_CAN_BCM=y CONFIG_CAN_GW=y CONFIG_CAN_DEBUG_DEVICES=y

Device Tree for dcan0:

dcan0_pins_default: dcan0_pins_default { pinctrl-single,pins = &lt; AM33XX_IOPAD(0x920, PIN_INPUT | MUX_MODE1 ) /* (K15) gmii1_txd2.dcan0_rx */ AM33XX_IOPAD(0x91c, PIN_OUTPUT | MUX_MODE1 ) /* (J18) gmii1_txd3.dcan0_tx */ &gt;; }; &amp;dcan0 { pinctrl-names = "default"; pinctrl-0 = &lt;&amp;dcan0_pins_default&gt;; status = "okay"; #address-cells = &lt;1&gt;; #size-cells = &lt;0&gt;; };

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dcan0_pins_default: dcan0_pins_default { pinctrl-single,pins = < AM33XX_IOPAD(0x920, PIN_INPUT | MUX_MODE1 ) /* (K15) gmii1_txd2.dcan0_rx */ AM33XX_IOPAD(0x91c, PIN_OUTPUT | MUX_MODE1 ) /* (J18) gmii1_txd3.dcan0_tx */ >; };   &dcan0 { pinctrl-names = "default"; pinctrl-0 = <&dcan0_pins_default>; status = "okay"; #address-cells = <1>; #size-cells = <0>; };

[CobaltMonte]

Solved.

Needed to add iproute2.  BR2_PACKAGE_IPROUTE

 

[Neeraj Dantu]

Glad you are able to resolve the issue. Thanks for letting us know. We plan to create more collateral around CAN bus and Buildroot in the future.

Neeraj

[Author]

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