Re: [lm-sensors] sensors.conf for DFI LP MI P55-T36 (it8720-*)

From: Jean Delvare <khali@linux-fr.org>
To: lm-sensors@vger.kernel.org
Subject: Re: [lm-sensors] sensors.conf for DFI LP MI P55-T36 (it8720-*)
Date: Thu, 24 Jun 2010 06:40:06 +0000	[thread overview]
Message-ID: <20100624084006.7fce8a0b@hyperion.delvare> (raw)
In-Reply-To: <20100606154919.4066.qmail@mailserver01.ottosenfx.dk>

Hi Lars,

On 23 Jun 2010 20:47:14 -0000, Lars Kr.Lundin wrote:
> On Wed, Jun 23, 2010 at 10:31:39PM +0200, Jean Delvare wrote:
> 
> > try instead:
> >
> > # isadump -y -k 0x87,0x01,0x55,0x55 0x2e 0x2f 7
> >
> > Thanks,
> > --
> > Jean Delvare
> 
> $ sudo isadump -y -k 0x87,0x01,0x55,0x55 0x2e 0x2f 7
>      0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
> 00: 00 00 00 00 00 00 00 07 00 00 00 00 00 00 00 00 
> 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
> 20: 87 20 08 00 00 01 fe 30 43 10 00 00 1f 00 00 00 
> 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
> 40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
> 50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
> 60: 00 00 0a 20 0a 30 00 00 00 00 00 00 00 00 00 00 
> 70: 00 00 00 00 00 04 00 00 00 00 00 00 00 00 00 00 
> 80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
> 90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
> a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
> b0: 00 00 00 00 00 00 00 00 20 00 70 30 00 00 00 00 
> c0: 01 42 30 01 00 00 00 00 01 42 30 01 00 00 00 00 
> d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
> e0: 00 00 00 00 00 00 00 00 00 03 03 03 00 3e 3e 0c 
> f0: 00 00 00 00 00 00 40 00 00 00 00 00 cf 00 00 00 
> 
> (I have to wonder what one can learn from the above :-)

I was specifically interested in the value of register 0x1f. the lower
2 bits control internal routing and scaling of in3 and in7. The IT8720F
datasheet documents the default value of this register as 0x03, but
many boards I've see had value 0x01, which isn't correct because in7
should _always_ be routed internally (the chip has no physical pin for
in7!).

The bottom line is that your chip is properly configured and won't be
affected by the fix I'm working on.

Also note that you could improve your configuration file by adding the
following:

   label  in3  "+5V"
   label  in7  "5VSB"
   compute  in3  @ * (6.8/10+1), @ / (6.8/10+1)
   compute  in7  @ * (6.8/10+1), @ / (6.8/10+1)

Thanks,
-- 
Jean Delvare

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