[Request] Adding support for Nuvoton NPCE388N EC

[nb-programmer]

Hi

I have a Lenovo laptop (specifically model e41-15) that has an AMD chipset and a SuperIO/EC made by Nuvoton. I came across this driver repo, and thought maybe this chip could be supported? Currently there are no drivers for this and lm_sensors find no sensors (fan, temp, etc.).

I have used ec_probe and found some data addresses matching such as the fan RPM. I think this can be investigated more and may eventually work. But since this repo is focused on the nct6687 series maybe will need to be in a separate fork.

Let me know of anything I can do to help out. Thanks!

Chip photo:

[nb-programmer]

EC registers (sudo ec_probe dump):

---|------------------------------------------------
   | 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
---|------------------------------------------------
00 | 00 00 00 00 00 00 19 00 00 00 80 00 00 00 00 00
10 | 00 00 00 00 00 00 00 00 00 00 00 00 00 40 00 00
20 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
40 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
80 | 00 00 00 00 00 00 00 00 01 01 03 00 80 00 00 00
90 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
A0 | 00 00 00 C6 C1 00 00 61 64 00 00 08 64 1A 00 70
B0 | 3A 00 23 00 00 00 00 00 00 00 00 49 22 00 00 00
C0 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
D0 | 00 00 00 00 00 00 FF 00 00 00 00 00 00 00 00 00
E0 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
F0 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

I'm 100% sure that byte 0x06 is one byte of the fan RPM. Not sure how to view the other pages since it only dumps 256 bytes.

Found it by slowing down the fan by hand and monitoring the values.