Buildroot and CAN (can0/dcan0)

Tagged: CAN DCAN buildroot

This topic has 2 replies, 2 voices, and was last updated 6 years, 2 months ago by Neeraj Dantu.

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August 15, 2018 at 12:27 pm #6230

CobaltMonte

Participant

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

[ 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

<p style=”padding-left: 30px;”>
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

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;;
};

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>;

};

August 21, 2018 at 2:16 pm #6257
CobaltMonte
Participant
Solved.
Needed to add iproute2. BR2_PACKAGE_IPROUTE
August 21, 2018 at 4:41 pm #6259
Neeraj Dantu
Moderator
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

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