iichb0: I2C error

[Justin Hibbits]

On Sat, Jul 13, 2019 at 9:32 AM Jason Bacon <bacon4000 at gmail.com> wrote:
>
>
> On my PowerMac G5, I consistently get this error after a cold boot:
>
> iichb0: I2C error
>
> After a minute or so, the fans ramp up to maximum.
>
> The error also consistently goes away after a warm reboot.  Nothing more
> in dmesg:
>
> FreeBSD powermacg5.acadix  bacon ~ 211: dmesg|grep iichb0
> iichb0: <Keywest I2C controller> mem 0xf8001000-0xf8001fff irq 42 on unin0
> iicbus0: <OFW I2C bus> on iichb0
> iichb0: I2C error
> iichb0: <Keywest I2C controller> mem 0xf8001000-0xf8001fff irq 42 on unin0
> iicbus0: <OFW I2C bus> on iichb0
>
> No more runaway fans.
>
> Does this provide any clues about the cause?

Hi Jason,

How recently did this start occurring?  Would you be able to bisect
the builds from a known-good starting point?

Thanks.

- Justin