aw_thermal breakage on Allwinner H3 SoC

[Milan Obuch]

Hi,

today I svnup'ped sources for 12-CURRENT I use to test on Orange Pi One
to svn revision 307846 and there was no aw_thermal device anymore.
After some fiddling I found reason is in aw_sid.c, namely in function
aw_sid_read_tscalib. I managed to get it working, somehow, giving the
patch in attachment. This way "sun8i-h3-sid" is defined and attaches,
which in turn makes aw_thermal attached and working, a bit.

Almost identical patch, without the last chunk was necessary in past,
but now behavior changed a bit - namely, sysctl dev.aw_thermal.0.cpu
shows 99C right after start, now, running for almost six hours idle,
100C. This is surely wrong. SoC is not that hot given I can put my
finger on it without risk of being immediatelly burned. Before this
change it showed some 49 degrees right after power on and rises slowly
up to 60 - 63 degrees. This values were not correct, too, temperature
is maybe 45 degrees or so according to my finger integrated
thermometer :)

Did anybody test this on H3 based board? If yes, is there anything
special to be put into FDT definition file?

Has anybody a clue what's going on? If someone has an idea what to
check, I am ready to check it, but currently have not much experience
with sensors in SoC.

Regards,
Milan
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