XBMC: Show cpu temperature

[vDorst]

Amlogic has adc channel to readout the temperature.

If temperature readout is enabled in the kernel, then /sys/class/saradc/temperature is available.
Temperature in Celsius.

# cat /sys/class/saradc/temperature
58

[davilla]

ohhh, this one is of interest, details please.

[vDorst]

In the new kernel 3.0.50 the SARADC driver has this function.
https://github.com/nspierbundel/amlogic-common/blob/master/drivers/amlogic/input/saradc/saradc.c#L296

Your have to enable this option in the kernel https://github.com/nspierbundel/amlogic-common/blob/master/arch/arm/mach-meson6/Kconfig#L42

Also this is involved. https://github.com/nspierbundel/amlogic-common/blob/master/arch/arm/mach-meson6/cpu.c#L118

I tried to back ported to 2.6 kernel. But without success. I did something wrong.
The SARADC driver, compared to 2.6 and 3.0, did not changed that much. So it should be really easy.
I did not implement the option in Kconfig nor in cpu.c. Maybe that is the problem why it did not work so well for me.

To use it in XBMC:
See http://wiki.xbmc.org/?title=Advancedsettings.xml, cmd 3.58 .
A simple cat command could be sufficient.

[Stane1983]

M3 temp reading:

cat /sys/class/saradc/saradc_ch6
Temp: 58 oC

[davilla]

nice, got a patch ?

[Stane1983]

Did not toy with xbmc, just enabled saradc in kernel.

See Stane1983/buildroot-linux-kernel-m3@bd33bda

Update:

Patch for m3 xbmc advancedsettings (tested on 12.2):
https://gist.github.com/Stane1983/6302201

Note: Not supported by every board, eg. does not work on G-Box and variants