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>
0c5dd9febb