[coreboot-gerrit] Change in coreboot[master]: drivers/i2c/nct7802y: configure local temp sensor

[Maxim Polyakov (Code Review)]

Hello build bot (Jenkins),

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/39766

to look at the new patch set (#25).

Change subject: drivers/i2c/nct7802y: configure local temp sensor
......................................................................

drivers/i2c/nct7802y: configure local temp sensor

According to the documentation [1], the Mode Selection Register sets
the operation mode of the local temperature sensors. It is necessary
for some Intel processors (Apollo Lake SoC) that do not support PECI
and the CPU temperature is taken from the thermistor (NTC).

This patch allows to configure local sensor mode from a tree of devices
for a board that uses this HWM.

TEST = After loading the nct7802 module on the Kontron mAL-10 [2] with
       Linux OS, we can see configuration of the HWM with one sensor in
       the thermistor mode:

user@user-apl:~$ sensors
coretemp-isa-0000
Adapter: ISA adapter
Package id 0:  +41.0°C  (high = +110.0°C, crit = +110.0°C)
Core 0:        +40.0°C  (high = +110.0°C, crit = +110.0°C)
Core 1:        +40.0°C  (high = +110.0°C, crit = +110.0°C)
Core 2:        +41.0°C  (high = +110.0°C, crit = +110.0°C)
Core 3:        +41.0°C  (high = +110.0°C, crit = +110.0°C)

nct7802-i2c-0-2e
Adapter: SMBus CMI adapter cmi
in0:          +3.35 V  (min =  +0.00 V, max =  +4.09 V)
in1:          +1.92 V
in3:          +1.21 V  (min =  +0.00 V, max =  +2.05 V)
in4:          +1.68 V  (min =  +0.00 V, max =  +2.05 V)
fan1:           0 RPM  (min =    0 RPM)
fan2:         868 RPM  (min =    0 RPM)
fan3:           0 RPM  (min =    0 RPM)
temp1:        +42.5°C  (low  =  +0.0°C, high = +85.0°C)
                       (crit = +100.0°C)  sensor = thermistor
temp4:        +44.0°C  (low  =  +0.0°C, high = +85.0°C)
                       (crit = +100.0°C)
temp6:         +0.0°C

[1] page 30, section 7.2.32, Nuvoton Hardware Monitoring IC NCT7802Y
    with PECI 3.0 interface, datasheet, revision 1.2, february 2012
[2] https://review.coreboot.org/c/coreboot/+/39133

Change-Id: I28cc4e5cae76cf0bcdad26a50ee6cd43a201d31e
Signed-off-by: Maxim Polyakov 
---
M src/drivers/i2c/nct7802y/chip.h
M src/drivers/i2c/nct7802y/nct7802y.h
M src/drivers/i2c/nct7802y/nct7802y_fan.c
3 files changed, 29 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/66/39766/25