[lm-sensors] Standalone driver for W83677HG-I, NCT6775F, NCT6776F

[Ian Dobson]

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From: "Guenter Roeck" <guenter.roeck at ericsson.com>
Sent: Sunday, February 06, 2011 2:00 AM
To: "Ian Dobson" <i.dobson at planet-ian.com>
Cc: <lm-sensors at lm-sensors.org>
Subject: Re: [lm-sensors] 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

 0x150 = 0
 0x151 = 0
 0x075 = 31
 0x076 = 0
 0x152 = 0
 0x200 = c

I just added a simple
tmp=w83627ehf_read_value(data,0x150);
printk("0x150 = %0x\n",tmp);

to the drive to get the values

Regards
Ian Dobson