[lm-sensors] Testing LM-Sensor Support of SCH5127 in Acer easyStore H340

Juerg Haefliger juergh at gmail.com
Thu Dec 9 14:46:39 CET 2010


> On Thu, 9 Dec 2010 12:31:28 +0100, Juerg Haefliger wrote:
>> Hi Jean and Jeff,
>>
>>
>> > On Mon, 29 Nov 2010 00:20:44 -0600 (CST), Jeff Rickman wrote:
>> >> Providing some feedback now that SCH5127 support is "mainline" in
>> >> LM_Sensors; no "force_id" option required.
>> >> (...)
>> >> [root at anas-01 ~]# service lm_sensors status
>> >> coretemp-isa-0000
>> >> Adapter: ISA adapter
>> >> Core 0:      +21.0°C  (crit = +90.0°C)
>> >>
>> >> sch5127-isa-0870
>> >> Adapter: ISA adapter
>> >> V+1.5:       +1.42 V  (min =  +1.35 V, max =  +1.65 V)
>> >> 5VTR:        +4.78 V  (min =  +4.50 V, max =  +5.48 V)
>> >> VBAT:        +3.32 V  (min =  +0.00 V, max =  +4.38 V)
>> >> V+5:         +5.09 V  (min =  +0.00 V, max =  +6.72 V)
>> >> Vccp:        +1.48 V  (min =  +1.35 V, max =  +1.49 V)
>> >> VCC:         +3.33 V  (min =  +0.00 V, max =  +4.38 V)
>> >> VTR:         +3.24 V  (min =  +0.00 V, max =  +4.38 V)
>> >> Side Fan:   2250 RPM  (min = 600 RPM)
>> >> MCH Fan:    5137 RPM  (min = 4500 RPM)
>> >> CPU Temp:    +47.6°C  (low  = +20.0°C, high = +60.0°C)
>> >> SYS Temp:    +35.1°C  (low  = +20.0°C, high = +60.0°C)
>> >>
>> >> Here is my "/etc/sensors.d/local.conf" file:
>> >>
>> >> [root at anas-01 ~]# cat /etc/sensors.d/local.conf
>> >> # libsensors configuration file
>> >> # -----------------------------
>> >>
>> >> chip "sch5127-isa-0870"
>> >>
>> >>     label in0 "V+1.5"
>> >>     label in1 "5VTR"
>> >>     label in2 "VBAT"
>> >>     label in3 "V+5"
>> >>     label in4 "Vccp"
>> >>     label in5 "VCC"
>> >>     label in6 "VTR"
>>
>> According to the datasheet (and I just double-checked the scaling
>> factors in the driver and they are correct), the voltages are as
>> follows:
>>
>> in0: 2.5V   (2.5V nominal, 3.320V max)
>> in1: Vccp   (2.25V nominal, 2.988V max)
>> in2: VCC   (3.3V nominal, 4.383V max)
>> in3: V2_IN   (1.125V nominal, 1.5V max, should be wired to scaled down 5V)
>> in4: V1_IN   (1.125V nominal, 1.5V max, should be wired to scaled down 12V)
>> in5: VTR   (3.3V nominal, 4.383V max)
>> in6: VBat   (3.0V nominal, 4.383V max)
>>
>> If the chip is hooked up according to the datasheet then the only
>> voltages that require scaling are in3 & 4.
>
> OK, thanks for checking. Your conclusion matches mine.
>
> Do you happen to know if any of these are internal (so that the
> mapping/label doesn't depend on the system)? This would help. in2 and
> in6 would be candidates, maybe in5 as well.

>From the datasheet it looks like in2, in5 and in6 need to be wired as
specified otherwise the chip will not work properly under certain
conditions. VTR is the standby voltage and if standby mode is not
required, could be connected to VCC externally.


> Do you have any clue what
> "VTR" stands for?

VTR is the ATX standby voltage also called trickle voltage (courtesy
of google :-)


> For internal voltages we can put the labels in the default
> sensors3.conf file, to help the users.

Ah. I just realized that the SCH5127 has another voltage input that
the other dme1737 clones don't have but which isn't exposed through
the driver. Register 0x1f, nominal 1.5V, max 2.0V.


...Juerg


> --
> Jean Delvare
>




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