NCT6106D: strange VIN max behaviour (nct6775)

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Hi,

I'm about to test the new NCT6106D part of the Nuvoton nct6775 driver.
However, I experience a strange behaviour concerning the maximum
thresholds of in1 (wiring: +5V at chip's VIN0, 15/10 resistor ratio) and
in4 (wiring: +12V at chip's VIN1, 110/22 ratio). The behaviour is as
follows:
- the current value always looks good
- the minimum threshold value always looks good
- the maximum threshold value _only_ looks good, when it is configured
_lower_ than the current value (which doesn't make any sense anyway, but
I checked it just for error analysis)
- but once the maximum threshold value is configured higher than the
current value (which it normally is), then the read maximum value is
exactly the same as the current value

Please see at the end of this mail for the sensors command output and
the related sensors.conf.

When I analysed the nct6775.c source code, I noticed that the voltage
registers are programmed as "u16" registers. In the NCT6102D/NCT6106D
spec (see [1], page 111 and following), the tables say that the
registers are 8bit only. May this be the reason for the strange
behaviour? Or is it a bad typo Nuvoton made in the spec?

However, the register _adresses_ in the source code for the current
value and the min and max thresholds seem to apply with the ones
specified in the spec.

Björn

[1]
https://download.nuvoton.com/NuvotonMOSS/DownloadService/Member/DocumentsInfo.aspx?tp_GUID=DA00-NCT6106D

My sensors output:
[root@allinone-wnlpos ~]# LANG=C sensors
nct6106-isa-0290
Adapter: ISA adapter
CPUVCORE:    +1.74 V  (min =  +1.00 V, max =  +2.00 V)
+5V:         +5.10 V  (min =  +4.50 V, max =  +5.10 V)   ALARM
+12V:       +12.24 V  (min = +10.70 V, max = +12.24 V)   ALARM
VBat:        +3.17 V  (min =  +3.01 V, max =  +4.00 V)
CPU:        2830 RPM  (min =  300 RPM)
SYSTEM:      +32.0 C  (high = +100.0 C, hyst = +75.0 C)
                      (crit = +127.0 C)                  sensor =
thermal diode
PCH:         +43.0 C  (high = +80.0 C, hyst = +75.0 C)
                      (crit = +127.0 C)                  sensor =
thermal diode
CPU:         +37.0 C  (high = +80.0 C, hyst = +75.0 C)
                      (crit = +127.0 C)


My file /etc/sensors3.conf:
--------%<-------- snip
chip "nct6106-isa-0290"

#==================================================
# Voltage inputs
#==================================================

    # CPUVCORE
    label in0 "CPUVCORE"
    compute in0  @, @
    set in0_min  1
    set in0_max  2

    # +5V (ok) (chip: VIN0)
    label in1 "+5V"
    compute in1 ((15/10) +1)*@, @/((15/10) +1)
    set in1_min  4.5
    set in1_max  5.5

    # +12V (ok) (chip: VIN1)
    label in4 "+12V"
    compute in4 ((110/22) +1)*@, @/((110/22) +1)
    set in4_min  10.7
    set in4_max  13.7

    # VBat
    label in7 "VBat"
    set in7_min  3.0
    set in7_max  4.0

    ignore  in2
    ignore  in3
    ignore  in5
    ignore  in6
    ignore  in8
#    ignore  vid



#==================================================
# Temperature inputs
#==================================================
    label temp1 "SYSTEM"
    set temp1_max 100
    set temp1_max_hyst 75

    label temp3 "PCH"

    label temp7 "CPU"

    ignore temp8
    ignore temp9
    ignore temp10

    ignore beep_enable


#==================================================
# Fan inputs
#==================================================
    # CPU Fan
    label fan2 "CPU"
    set fan2_min  300

    ignore fan1
    ignore fan3
-------->%-------- snap

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