soc/intel/common/smbus: Add support for Apollo Lake SoC

Previously, SMBUS support was not required for Apollo Lake, since the
SPD was read inside FSP-M, during memory initialization. However, the
Kontron mAL-10 COMe module contains Nuvoton HWM chip that is connected
to the processor via SMBUS. This patch adds SMBUS common driver support
for Apollo Lake to initialize this HWM.

TEST = After loading the nct7802 module on the Kontron mAL-10 with Linux
       OS, we can read the hwm registers, see temperature and fan speed:

coretemp-isa-0000
Adapter: ISA adapter
Package id 0:  +52.0°C  (high = +110.0°C, crit = +110.0°C)
Core 0:        +52.0°C  (high = +110.0°C, crit = +110.0°C)
Core 1:        +52.0°C  (high = +110.0°C, crit = +110.0°C)
Core 2:        +53.0°C  (high = +110.0°C, crit = +110.0°C)
Core 3:        +53.0°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:        1729 RPM  (min =    0 RPM)
fan3:           0 RPM  (min =    0 RPM)
temp1:        +53.5°C  (low  =  +0.0°C, high = +85.0°C)
                       (crit = +100.0°C)  sensor = thermistor
temp4:        +53.0°C  (low  =  +0.0°C, high = +85.0°C)
                       (crit = +100.0°C)
temp6:         +0.0°C

Change-Id: I408ef84ede27a45fb057e22b2757fa6e66277ddd
Signed-off-by: Maxim Polyakov <max.senia.poliak@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44475
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions