[lm-sensors] w83627ehf informations

[David Hubbard]

Hello Torsten,

On 11/11/06, slompf <2crazy4you at gmx.de> wrote:
> Hallo,
>
> I'm trying to reduce the speed of a cpu fan on a k8n-vm. The chip is for
> controlling the temp is a winbond w83627ehf. My kernel is 2.6.18.2.
> lm-sensors seems to work correctly, because on the 'sensors' command I'm
> getting the following output:
>
> w83627ehf-isa-0290
> Adapter: ISA adapter
> Case Fan:  888 RPM  (min = 1205 RPM, div = 8)
> CPU Fan:  2109 RPM  (min = 1704 RPM, div = 8)
> fan3:        0 RPM  (min =   45 RPM, div = 128)
> fan4:        0 RPM  (min = 10546 RPM, div = 128)
> Sys Temp:    +28°C  (high =   +45°C, hyst =   +40°C)
> CPU Temp:  +23.0°C  (high = +45.0°C, hyst = +40.0°C)
> temp3:     +25.0°C  (high = +80.0°C, hyst = +75.0°C)
>
> Now the first question: I thought support for the voltage inputs was
> added at one of the last kernels. Is that correct?

Yes, that is correct.

> Now the PROBLEM: After calling pwmconfig (which seems to be the tool for
> configuring fancontrol) I'm getting this output:
>
> /usr/sbin/pwmconfig: There are no pwm-capable sensor modules installed
>
> After checking this script, it became clear that it needs something
> called pwm.. or fan.._pwm in the /sys/bus/i2c/devices/9191-0290
> directory. ls does only show that:
>
> bus         fan2_div    fan4_alarm    in0_max    in2_input  in4_alarm
> in5_min    in7_max    in9_input    temp1_input     temp3_alarm
> driver      fan2_input  fan4_div      in0_min    in2_max    in4_input
> in6_alarm  in7_min    in9_max      temp1_max       temp3_input
> fan1_alarm  fan2_min    fan4_input    in1_alarm  in2_min    in4_max
> in6_input  in8_alarm  in9_min      temp1_max_hyst  temp3_max
> fan1_div    fan3_alarm  fan4_min      in1_input  in3_alarm  in4_min
> in6_max    in8_input  name         temp2_alarm     temp3_max_hyst
> fan1_input  fan3_div    hwmon:hwmon0  in1_max    in3_input  in5_alarm
> in6_min    in8_max    power        temp2_input     uevent
> fan1_min    fan3_input  in0_alarm     in1_min    in3_max    in5_input
> in7_alarm  in8_min    subsystem    temp2_max
> fan2_alarm  fan3_min    in0_input     in2_alarm  in3_min    in5_max
> in7_input  in9_alarm  temp1_alarm  temp2_max_hyst
>
> Next question: where are my pwm entries? The in_... where printed first,
> after I compiled the new kernel. (2.6.17->2.6.18) Is the pwm function
> not supported for this chipset in the above mentioned kernel?

You need a newer kernel. The fan control support is available in the
-mm branch (which is for testing, before being integrated into the
mainline kernel). I looked at
http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.18.tar.bz2 and
it has an older version of drivers/hwmon/w83627ehf.c which does not
include pwm/fan control support. It would be great if you could
upgrade to a testing kernel and report your success / failure with the
new driver. Does this help?

> Maybe you guys can give some general information about the status of the
> chipset. Whats supported by which kernel and what is planned and what is
> not. That would be quiet helpful. Maybe there is a document more
> detailed than that: http://www.lm-sensors.org/wiki/Devices?

>From the wiki: "Fan control support is available in -mm."

I'm probably the person you should contact to get work done on the
w83627ehf driver. I've had a backlog of schoolwork recently, but I am
looking at getting the w83627dhg support into the w83627ehf driver in
the next two weeks. When I submit that patch, it will go into the
latest -mm kernel.

Thank you for writing,
David