Re: Testing CAN on Allwinner A20 / Banana Pi

[gianluca <gianlucarenzi@eurek.it>]

On 03/19/2016 01:33 PM, Marc Kleine-Budde wrote:
>>
>> Compiling to dtb and back to dts now resolves to
>>
>> 		can@01c2bc00 {
>> 			compatible = "allwinner,sun4i-a10-can";
>> 			reg = <0x1c2bc00 0x400>;
>> 			interrupts = <0x0 0x1a 0x4>;
>> 			clocks = <0x31 0x4>;
>> 			status = "okay";
>> 			pinctrl-names = "default";
>> 			pinctrl-0 = <0x32>;
>> 		};
>>
>> That does look plausible from my perspective.
>>
>> Unfortunately I'm still missing /dev/can0 and have no clue why.
>
> CAN devices are network devices and will not show up in "/dev". Have a
> look at:
>
>      ifconfig -a
>
>> If your Bpi works with legacy u-boot, I would try that next.

It is not enough having the can-core controller in dtsi only. The kernel 
has to be compiled with a network/can/socketcan enabled and the specific 
SoC can controller enabled in the same subarch structure.
i.e.: you will need to have:

in sunxi_defconfig:

CONFIG_CAN=y
CONFIG_CAN_SUN4I=y

Just my $0.2...

Hope this helps!
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