Nanopi Neo I2C

[Daniel Braniss]

> On 11 Aug 2018, at 14:49, lyd mc via freebsd-arm <freebsd-arm at freebsd.org> wrote:
> 
> Hi List,
> Can you help me make I2C work in this board?
> I can detect the controller but cannot access it through iic ioctl. 
> 
> root at nanopi-neo:~/prog/I2C # dmesg |grep iic
> iichb0: <Allwinner Integrated I2C Bus Controller> mem 0x1c2ac00-0x1c2afff irq 34 on simplebus0
> iicbus0: <OFW I2C bus> on iichb0
> iichb1: <Allwinner Integrated I2C Bus Controller> mem 0x1c2b000-0x1c2b3ff irq 35 on simplebus0
> iicbus1: <OFW I2C bus> on iichb1
> iichb2: <Allwinner Integrated I2C Bus Controller> mem 0x1c2b400-0x1c2b7ff irq 36 on simplebus0
> iicbus2: <OFW I2C bus> on iichb2
> iic0: <I2C generic I/O> on iicbus0
> iic1: <I2C generic I/O> on iicbus1
> iic2: <I2C generic I/O> on iicbus2
> 
> kdump output:
> 
>   1290 mcp      NAMI  "/dev/iic0"
>   1290 mcp      RET   openat 3
>   1290 mcp      CALL  ioctl(0x3,I2CRDWR,0xbfbfecd4)
>   1290 mcp      RET   ioctl -1 errno 2 No such file or directory
> 
> This seems to work on my RPI.
> 
> Regards,Alyd

what FreeBSD are you using? I have it working on CURRENT.

what does 
  i2c -s
say?

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