found on the ASRock X670E PG Lightning (and possibly others). the userspace sensors-detect utiliy found "a" chip right away: |Probing for Super-I/O at 0x2e/0x2f |[...] |Trying family `VIA/Winbond/Nuvoton/Fintek'... Yes |Found unknown chip with ID 0xd802 | (logical device B has address 0x290, could be sensors) Looking at the documentation: ASRock was nice enough to point the exact chip out in the mainboard's "English User Manual" [0]. In section "1.5 Block Diagram" on page 10 it says "SIO NCT6796D-S". It is also mentioned that it uses eSPI to interface with the CPU. Adding the chip's ID as a "clone" of the existing NCT6796D leads to: |nct6796-isa-0290 |Adapter: ISA adapter |Vcore: 720.00 mV (min = +0.00 V, max = +1.74 V) |in1: 1.82 V (min = +0.00 V, max = +0.00 V) ALARM |AVCC: 3.39 V (min = +0.00 V, max = +0.00 V) ALARM |+3.3V: 3.28 V (min = +0.00 V, max = +0.00 V) ALARM |in4: 1.66 V (min = +0.00 V, max = +0.00 V) ALARM |in5: 1.05 V (min = +0.00 V, max = +0.00 V) ALARM |in6: 1.46 V (min = +0.00 V, max = +0.00 V) ALARM |3VSB: 3.39 V (min = +0.00 V, max = +0.00 V) ALARM |Vbat: 3.23 V (min = +0.00 V, max = +0.00 V) ALARM |in9: 904.00 mV (min = +0.00 V, max = +0.00 V) ALARM |in10: 608.00 mV (min = +0.00 V, max = +0.00 V) ALARM |in11: 608.00 mV (min = +0.00 V, max = +0.00 V) ALARM |in12: 1.04 V (min = +0.00 V, max = +0.00 V) ALARM |in13: 896.00 mV (min = +0.00 V, max = +0.00 V) ALARM |in14: 1.26 V (min = +0.00 V, max = +0.00 V) ALARM |fan1: 815 RPM (min = 0 RPM) |fan2: 0 RPM (min = 0 RPM) |fan3: 781 RPM (min = 0 RPM) |fan7: 0 RPM (min = 0 RPM) |SYSTIN: +26.5°C sensor = thermistor |CPUTIN: +27.0°C (high = +80.0°C, hyst = +75.0°C) |AUXTIN0: +2.0°C (high = +67.0°C, hyst = +110.0°C) |AUXTIN1: +15.0°C sensor = thermistor |AUXTIN2: +15.0°C sensor = thermistor |AUXTIN3: +13.0°C sensor = thermistor |SMBUSMASTER 0: +39.5°C (high = +80.0°C, hyst = +75.0°C) |PCH_CHIP_CPU_MAX_TEMP: +0.0°C |PCH_CHIP_TEMP: +0.0°C |PCH_CPU_TEMP: +0.0°C |TSI0_TEMP: +39.9°C |intrusion0: ALARM |intrusion1: ALARM |beep_enable: disabled Of some note is: - voltages for Vcore, 3V3, AVCC, 3VSB and Vbat have sensible values. The other voltage inputs are likely "limited to a maximum value of 2.048V due to an internal setting of 8mV LSB (256 steps x 8mV = 2.048V)" [1] (Section 8.6 Analog Inputs - page 58) - temperatures reported by SYSTIN (mainboard), TSI0+SMBUSMASTER (CPU-CCDs) matches too. CPUTIN really seems to be the IO-DIE of the CPU. - fan1 rpms matches the AIO (2nd CPU fan). fan3 is the 2nd chassis fan. The motherboard has pin-headers for 2 CPU-fans and 4 Chassis/AUX-fans. This means that two are missing! The novuton documentation [1] says on page 3 that there are 6 fan controls + monitoring inputs. what's odd is that pwm1-5 values provided through the sysfs interface. and these are matching the fan curves that have been set in the bios. - intrusion is not connected, same with all PCH* sensors. AUXTIN123 are not moving. AUXTIN0 is moving with [0] https://download.asrock.com/Manual/X670E%20PG%20Lightning_English.pdf [1] https://www.nuvoton.com/export/resource-files/NCT6796D_Datasheet_V0_6.pdf Signed-off-by: Christian Lamparter <chunkeey@xxxxxxxxx> --- Any insights into the missing two fan speed sensors would be very appreciated. I didn't find a datasheet that talks about the "NCT6796D->S<" specifically or the "odd" 0xd802 id value. (I checked on my mainboard and the label on the chip really ends with an "-S") Nuvoton lists the chip as "NCT6796D-E" on their website. But there are pictures on google that show a ASRock X570 Taichi motherboard with a NCT6796D-"R" chip. This looks to me that the letter is something like a revision or model year? --- drivers/hwmon/nct6775-core.c | 1 + drivers/hwmon/nct6775-platform.c | 2 ++ 2 files changed, 3 insertions(+) diff --git a/drivers/hwmon/nct6775-core.c b/drivers/hwmon/nct6775-core.c index da9ec6983e13..8147544ad5d6 100644 --- a/drivers/hwmon/nct6775-core.c +++ b/drivers/hwmon/nct6775-core.c @@ -29,6 +29,7 @@ * nct6793d 15 6 6 2+6 0xd120 0xc1 0x5ca3 * nct6795d 14 6 6 2+6 0xd350 0xc1 0x5ca3 * nct6796d 14 7 7 2+6 0xd420 0xc1 0x5ca3 + * (0xd802) * nct6797d 14 7 7 2+6 0xd450 0xc1 0x5ca3 * (0xd451) * nct6798d 14 7 7 2+6 0xd428 0xc1 0x5ca3 diff --git a/drivers/hwmon/nct6775-platform.c b/drivers/hwmon/nct6775-platform.c index b34783784213..f355d0c2a8cd 100644 --- a/drivers/hwmon/nct6775-platform.c +++ b/drivers/hwmon/nct6775-platform.c @@ -84,6 +84,7 @@ MODULE_PARM_DESC(fan_debounce, "Enable debouncing for fan RPM signal"); #define SIO_NCT6793_ID 0xd120 #define SIO_NCT6795_ID 0xd350 #define SIO_NCT6796_ID 0xd420 +#define SIO_NCT6796S_ID 0xd800 #define SIO_NCT6797_ID 0xd450 #define SIO_NCT6798_ID 0xd428 #define SIO_ID_MASK 0xFFF8 @@ -987,6 +988,7 @@ static int __init nct6775_find(int sioaddr, struct nct6775_sio_data *sio_data) sio_data->kind = nct6795; break; case SIO_NCT6796_ID: + case SIO_NCT6796S_ID: sio_data->kind = nct6796; break; case SIO_NCT6797_ID: -- 2.38.1
