Re: i2c-i801 on AppleTV (1st gen)

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On Wed, 6 Feb 2013 15:00:58 +0100 (CET), Dag Wieers wrote:
> On Wed, 6 Feb 2013, Jean Delvare wrote:
> 
> > Not good. This can mean one of two things: either the chip has no
> > register 0x3f and it nacks non-existent register read attempts, or it
> > doesn't support SMBus read byte transactions at all. In the latter
> > case, I strongly suggest that you leave the chip alone. As for the
> > former case, there are a few thermal sensor chips which behave like,
> > don't have a register at 0x3f and can use slave address 0x48: DS1621
> > and similar, DS75, LM73.
> 
> It now consistently returns 0x3d, could this be a thermal value, like 61°C ?

Could be, but for now all I see is that 0x3d == 0x3f - 0x02, i.e. only
one bit changed. You will need to take more samples before you can draw
a conclusion. Also compare when CU is idle and when it's busy.

> The GPU reports 46°C (coming from nvidia-smi).

-- 
Jean Delvare
http://khali.linux-fr.org/wishlist.html

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