--------------------------------------------------
From: "Guenter Roeck" <guenter.roeck@xxxxxxxxxxxx>
Sent: Sunday, February 06, 2011 2:00 AM
To: "Ian Dobson" <i.dobson@xxxxxxxxxxxxxx>
Cc: <lm-sensors@xxxxxxxxxxxxxx>
Subject: Re: Standalone driver for W83677HG-I, NCT6775F,
NCT6776F
Hi Ian,
On Sat, Feb 05, 2011 at 04:46:22PM -0500, Ian Dobson wrote:
[ ... ]
Not bad, the results look almost the same as the standalone "hack" driver
for the n6776 I'm working on, looks as if I can stop now. The only thing
I'm
seeing is that on fan headers where no fan is attached I'm seeing 164RPM.
Can you try again ? I updated the code to address the problem.
The NCT6776F seems to use a 13-bit counter for the fans. The RPM formula
is
RPM = 1.35e6 / count. The value 1.35e6 value might come from a 22.5 kHz
counter. Now if the counter reaches the maximum value, which is 8191 for
a
13-bit counter, we get exactly an RPM of 164.815041.
nct6776-isa-0290
Adapter: ISA adapter
in0: +1.18 V (min = +0.95 V, max = +1.26 V)
in1: +1.02 V (min = +0.90 V, max = +1.20 V)
in2: +3.36 V (min = +3.01 V, max = +3.50 V)
in3: +3.34 V (min = +3.01 V, max = +3.50 V)
in4: +1.03 V (min = +1.00 V, max = +1.10 V)
in5: +2.04 V (min = +1.90 V, max = +2.00 V) ALARM
in6: +0.80 V (min = +0.77 V, max = +0.90 V)
in7: +3.42 V (min = +3.01 V, max = +3.50 V)
in8: +3.30 V (min = +3.01 V, max = +3.50 V)
fan1: 530 RPM (min = 0 RPM) ALARM
fan2: 1030 RPM (min = 0 RPM) ALARM
fan3: 164 RPM (min = 0 RPM) ALARM
fan4: 784 RPM (min = 0 RPM) ALARM
fan5: 164 RPM (min = 0 RPM) ALARM
temp1: +23.0°C (high = +35.0°C, hyst = +37.0°C) sensor =
thermistor
temp2: -60.0°C (high = +50.0°C, hyst = +55.0°C) sensor = diode
This doesn't look good either. Can you report the raw values you get when
reading
registers 0x150/0x151, 0x75/0x76, 0x152, and 0x200 ?
I have been wondering if I should retrieve the temperature values from
0x73/0x75/0x77.
This is another set of temperature registers supported by both chips and
used as
fan monitoring source. 0x150 and 0x200 specify the temperature source for
0x151 and
0x75, respectively.
Thanks,
Guenter
There's also something wrong with the fan alarm limits (w83627ehf.c file
from 05-Feb-2011 18:48):-
SYSFANIN: 526 RPM (min = 28125 RPM) ALARM
CPUFANIN: 994 RPM (min = 15340 RPM) ALARM
AUXFANIN0: 0 RPM (min = 12980 RPM) ALARM
AUXFANIN1: 769 RPM (min = 9642 RPM)
AUXFANIN2: 0 RPM (min = 8035 RPM) ALARM
The limits should be
label fan1 "SYSFANIN"
set fan1_min 400
label fan2 "CPUFANIN"
set fan2_min 600
label fan3 "AUXFANIN0"
set fan3_min 1000
label fan4 "AUXFANIN1"
set fan4_min 600
label fan5 "AUXFANIN2"
set fan5_min 1000
I'm also seeing this in the syslog
[127250.935448] w83627ehf: Found NCT6776 chip at 0x290
[127433.043365] w83627ehf w83627ehf.656: fan4 clock divider changed from 1
to 16
[127433.043413] w83627ehf w83627ehf.656: fan5 clock divider changed from 1
to 8
[127829.468663] w83627ehf: Found NCT6776 chip at 0x290
[127837.241797] w83627ehf w83627ehf.656: fan4 clock divider changed from 1
to 16
[127837.241842] w83627ehf w83627ehf.656: fan5 clock divider changed from 1
to 8
Regards
Ian Dobson
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