jc42 kernel module - DIMM Temperature sensors

SandVP · March 18, 2022 at 12:45 PM

Hi

Running LE10 on a NUC11TNBi7. I also run some unrelated stuff in docker on the same machine.

I was trying to read RAM DIMM's temperature sensors. But it seems a module called jc42 is not included.

I followed this guide: https://wiki.archlinux.org/title/Lm_senso…erature_sensors

This guide works fine for me in Debian btw.

So I then made my very first attempt in compiling LE with this module included. But it is also the first time I try to compile anything at all so now after 3 days I give up.

Would it be possible to include the jc42 module in the Generic image? Or if someone can build a test image to begin with since I am not even sure that just including that module is enough to make it work.

**heitbaum** · March 18, 2022 at 2:27 PM

Hi SandVP

A quick check here and jc42 is not adding to sensors on NUC11PAHi7

nuc11:~ # i2cdetect -l

i2c-0 i2c i915 gmbus dpa I2C adapter

i2c-1 i2c i915 gmbus dpb I2C adapter

i2c-2 i2c i915 gmbus dpc I2C adapter

i2c-3 i2c i915 gmbus tc1 I2C adapter

i2c-4 i2c i915 gmbus tc2 I2C adapter

i2c-5 i2c i915 gmbus tc3 I2C adapter

i2c-6 i2c i915 gmbus tc4 I2C adapter

i2c-7 i2c i915 gmbus tc5 I2C adapter

i2c-8 i2c i915 gmbus tc6 I2C adapter

i2c-9 i2c AUX USBC1/DDI TC1/PHY TC1 I2C adapter

i2c-10 i2c AUX USBC2/DDI TC2/PHY TC2 I2C adapter

i2c-11 i2c AUX USBC3/DDI TC3/PHY TC3 I2C adapter

i2c-12 i2c AUX USBC4/DDI TC4/PHY TC4 I2C adapter

i2c-13 i2c Synopsys DesignWare I2C adapter I2C adapter

i2c-14 smbus SMBus I801 adapter at efa0 SMBus adapter

nuc11:~ # i2cdetect -y 14

0 1 2 3 4 5 6 7 8 9 a b c d e f

00: 08 -- -- -- -- -- -- --

10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

30: 30 -- -- -- -- 35 UU UU -- -- -- -- -- -- -- --

40: -- -- -- -- 44 -- -- -- -- -- 4a 4b -- -- -- --

50: UU -- 52 -- -- -- -- -- -- -- -- -- -- -- -- --

60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

70: -- -- -- -- -- -- -- --

nuc11:~ # insmod http://LibreELEC.tv/build.LibreELEC-Generic.x86_64-11.0-devel/build/linux-5.17-rc8/drivers/hwmon/jc42.ko

nuc11:~ # sensors

coretemp-isa-0000

Adapter: ISA adapter

Package id 0: +36.0°C (high = +100.0°C, crit = +100.0°C)

Core 0: +30.0°C (high = +100.0°C, crit = +100.0°C)

Core 1: +32.0°C (high = +100.0°C, crit = +100.0°C)

Core 2: +32.0°C (high = +100.0°C, crit = +100.0°C)

Core 3: +33.0°C (high = +100.0°C, crit = +100.0°C)

acpitz-acpi-0

Adapter: ACPI interface

temp1: -263.2°C

temp2: +37.0°C (crit = +119.0°C)

iwlwifi_1-virtual-0

Adapter: Virtual device

temp1: N/A

nvme-pci-0100

Adapter: PCI adapter

Composite: +32.9°C (low = -0.1°C, high = +69.8°C)

(crit = +84.8°C)

SandVP · March 18, 2022 at 3:24 PM

Hi heitbaum

This is what I get. So I assume there are sensors at 18 and 1a.

Code

NUC11TNBi7:~ # i2cdetect -l
i2c-0   i2c             i915 gmbus dpa                          I2C adapter
i2c-1   i2c             i915 gmbus dpb                          I2C adapter
i2c-2   i2c             i915 gmbus dpc                          I2C adapter
i2c-3   i2c             i915 gmbus tc1                          I2C adapter
i2c-4   i2c             i915 gmbus tc2                          I2C adapter
i2c-5   i2c             i915 gmbus tc3                          I2C adapter
i2c-6   i2c             i915 gmbus tc4                          I2C adapter
i2c-7   i2c             i915 gmbus tc5                          I2C adapter
i2c-8   i2c             i915 gmbus tc6                          I2C adapter
i2c-9   i2c             AUX D/port D                            I2C adapter
i2c-10  i2c             AUX E/port E                            I2C adapter
i2c-11  i2c             AUX F/port F                            I2C adapter
i2c-12  i2c             AUX G/port G                            I2C adapter
i2c-13  i2c             Synopsys DesignWare I2C adapter         I2C adapter
i2c-14  i2c             Synopsys DesignWare I2C adapter         I2C adapter
i2c-15  smbus           SMBus I801 adapter at efa0              SMBus adapter
NUC11TNBi7:~ # i2cdetect -y 15
0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:                         08 -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- 18 -- 1a -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: 30 31 -- -- 34 35 UU UU -- -- -- -- -- -- -- --
40: -- -- -- -- 44 -- -- -- -- -- 4a 4b -- -- -- --
50: UU -- 52 -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

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**heitbaum** · March 18, 2022 at 8:06 PM

What version of LE10 are you running? Please confirm (ideally 10.0.2) and I will try an get a test jc42 for you.

nuc11:~ # uname -a

Linux nuc11 5.17.0-rc8 #1 SMP Fri Mar 18 09:21:50 UTC 2022 x86_64 GNU/Linux

nuc11:~ # cat /etc/release

Generic.x86_64-devel-20220318085355-518a13c

nuc11:~ # head .kodi/temp/kodi.log

SandVP · March 18, 2022 at 8:55 PM

That sound great. Thanks!

Code

NUC11TNBi7:~ # uname -a
Linux NUC11TNBi7 5.10.76 #1 SMP Sat Mar 5 19:12:54 CET 2022 x86_64 GNU/Linux
NUC11TNBi7:~ # cat /etc/release
Generic.x86_64-10.0.2
NUC11TNBi7:~ # head .kodi/temp/kodi.log
2022-03-16 00:40:44.072 T:1084     INFO <general>: -----------------------------------------------------------------------
2022-03-16 00:40:44.072 T:1084     INFO <general>: Starting Kodi (19.4 (19.4.0) Git:19.4-Matrix). Platform: Linux x86 64-bit
2022-03-16 00:40:44.072 T:1084     INFO <general>: Using Release Kodi x64
2022-03-16 00:40:44.072 T:1084     INFO <general>: Kodi compiled 2022-03-05 by GCC 10.2.0 for Linux x86 64-bit version 5.10.76 (330316)
2022-03-16 00:40:44.072 T:1084     INFO <general>: Running on LibreELEC (official): 10.0.2, kernel: Linux x86 64-bit version 5.10.76
2022-03-16 00:40:44.072 T:1084     INFO <general>: FFmpeg version/source: 4.3.2-Kodi
2022-03-16 00:40:44.072 T:1084     INFO <general>: Host CPU: 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz, 8 cores available
2022-03-16 00:40:44.072 T:1084     INFO <general>: special://xbmc/ is mapped to: /usr/share/kodi/
2022-03-16 00:40:44.072 T:1084     INFO <general>: special://xbmcbin/ is mapped to: /usr/lib/kodi
2022-03-16 00:40:44.072 T:1084     INFO <general>: special://xbmcbinaddons/ is mapped to: /usr/lib/kodi/addons

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**heitbaum** · March 19, 2022 at 7:56 AM

Compiled up:

build.LibreELEC-Generic.x86_64-10.0-devel/build/linux-5.10.76/drivers/hwmon/jc42.ko

Grab it from here.

LibreELEC.tv/jc42.ko at dev · heitbaum/LibreELEC.tv

Just enough OS for KODI. Contribute to heitbaum/LibreELEC.tv development by creating an account on GitHub.

github.com

If all works right… share the output and howto, and I’ll raise a PR for the module addition.

SandVP · March 19, 2022 at 12:33 PM

Awesome. Could you let me know where to put the file too ? 😅

**heitbaum** · March 19, 2022 at 8:44 PM

For the moment. Just use “insmod jc42.ko” (/storage is fine)

SandVP · March 19, 2022 at 11:39 PM

It is working. Thanks a lot!

Follow below commands.

Although with this manual load of jc42 it seems like all the steps have to be done after each reboot.

Code

NUC11TNBi7:~ # modprobe i2c_dev
NUC11TNBi7:~ # i2cdetect -l
i2c-0   i2c             i915 gmbus dpa                          I2C adapter
i2c-1   i2c             i915 gmbus dpb                          I2C adapter
i2c-2   i2c             i915 gmbus dpc                          I2C adapter
i2c-3   i2c             i915 gmbus tc1                          I2C adapter
i2c-4   i2c             i915 gmbus tc2                          I2C adapter
i2c-5   i2c             i915 gmbus tc3                          I2C adapter
i2c-6   i2c             i915 gmbus tc4                          I2C adapter
i2c-7   i2c             i915 gmbus tc5                          I2C adapter
i2c-8   i2c             i915 gmbus tc6                          I2C adapter
i2c-9   i2c             AUX D/port D                            I2C adapter
i2c-10  i2c             AUX E/port E                            I2C adapter
i2c-11  i2c             AUX F/port F                            I2C adapter
i2c-12  i2c             AUX G/port G                            I2C adapter
i2c-13  i2c             Synopsys DesignWare I2C adapter         I2C adapter
i2c-14  i2c             Synopsys DesignWare I2C adapter         I2C adapter
i2c-15  smbus           SMBus I801 adapter at efa0              SMBus adapter
NUC11TNBi7:~ # i2cdetect -y 15
0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:                         08 -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- 18 -- 1a -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: 30 31 -- -- 34 35 UU UU -- -- -- -- -- -- -- --
40: -- -- -- -- 44 -- -- -- -- -- 4a 4b -- -- -- --
50: UU -- 52 -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
NUC11TNBi7:~ # insmod jc42.ko
NUC11TNBi7:~ # echo jc42 0x18 > /sys/bus/i2c/devices/i2c-15/new_device
NUC11TNBi7:~ # echo jc42 0x1a > /sys/bus/i2c/devices/i2c-15/new_device
NUC11TNBi7:~ # sensors
jc42-i2c-15-18
Adapter: SMBus I801 adapter at efa0
temp1:        +47.0 C  (low  =  +0.0 C)                  ALARM (HIGH, CRIT)
(high =  +0.0 C, hyst =  +0.0 C)
(crit =  +0.0 C, hyst =  +0.0 C)


acpitz-acpi-0
Adapter: ACPI interface
temp1:        +39.0 C  (crit = +119.0 C)


jc42-i2c-15-1a
Adapter: SMBus I801 adapter at efa0
temp1:        +48.0 C  (low  =  +0.0 C)                  ALARM (HIGH, CRIT)
(high =  +0.0 C, hyst =  +0.0 C)
(crit =  +0.0 C, hyst =  +0.0 C)


coretemp-isa-0000
Adapter: ISA adapter
Package id 0:  +39.0 C  (high = +100.0 C, crit = +100.0 C)
Core 0:        +33.0 C  (high = +100.0 C, crit = +100.0 C)
Core 1:        +37.0 C  (high = +100.0 C, crit = +100.0 C)
Core 2:        +35.0 C  (high = +100.0 C, crit = +100.0 C)
Core 3:        +37.0 C  (high = +100.0 C, crit = +100.0 C)

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**heitbaum** · March 20, 2022 at 4:24 AM

You will be able to use modprobe once the .ko file is included in the modules directory - after the https://github.com/LibreELEC/LibreELEC.tv/pull/6312 request is added to the build. I believe that you will still need the “echo” during boot to enable the readings, via either systemd or autostart.sh

**chewitt** · March 20, 2022 at 6:10 AM

Merged. Next nightly should have it included.

SandVP · March 20, 2022 at 10:39 AM

Thanks guys!

SandVP · November 24, 2022 at 8:16 PM

Hi again.

Is it correctly understood that this change was included in 10.0.3?

Because I upgraded to that and am not able to install or find the jc42 driver.

Code

NUC11TNBi7:/run/kernel-overlays/modules/5.10.146/kernel/drivers/hwmon # ls
amd_energy.ko    fam15h_power.ko  k10temp.ko
asus_atk0110.ko  it87.ko          k8temp.ko

**chewitt** · November 25, 2022 at 12:59 PM

It was merged to the master branch so is in current LE11 nightlies. It wasn't backported to LE10.

SandVP · November 25, 2022 at 2:32 PM

Oh ok then, thanks!

Edit:

Just tried the latest LE11 nightly 20221126.

Can confirm the sensors show up after adding jc42.conf to modules-load.d. No further setup required.