On 23.01.2017 15:17, Аладышев Константин wrote: > Does someone have any experience with enabling PECI monitoring on nuvoton > SuperIOs ? > > I'm trying to enable it on board with Haswell+Lynxpoint CPU and NCT6776 > SuperIO. > > But all I see in lm-sensors output for now is zero temperature for PECI > Agent.
I'd first make sure, that the PECI interface is actually connected to a PECI slave. Do you have evidence that this is the case? It's not unusual to leave it unconnected. > > Does coreboot have any SuperIO chips/Intel CPUs/motherboards, that have this > functional enabled? What is usually need to be done to enable PECI > monitoring? FWIW (cf. superio/ite/it8772f and others), you have to program the PECI slave address and the command used to retrieve the temperature readings. What to program seems to be documented in a secret PECI specification (I could only find a license agreement, WTF?). How to program it, is super i/o specific (see datasheet of your chip). I wonder though, what are you up to? You only need PECI if you want your super i/o to to something automatically (like fan control) based on the readings. If you only want to read out the temperature, you can also directly ask the processor (MSR 0x19c, IIRC). Nico -- coreboot mailing list: [email protected] https://www.coreboot.org/mailman/listinfo/coreboot
