On Fri, May 21, 2021 at 1:41 PM Guenter Roeck <linux@xxxxxxxxxxxx> wrote: > > On 5/21/21 1:36 AM, Robert Marko wrote: > [ ... ] > >> In this context, I have a hard time finding a reference for > >> this power supply. Do you have a datasheet or some other documents > >> you can share ? > > > > Unfortunately, I don't have a datasheet as that would have made this way easier. > > It was all based on the vendor "driver" from DENT: > > https://github.com/dentproject/dentOS/blob/main/packages/platforms/delta/arm64/tn48m/tn48m-poe/modules/builds/src/arm64-delta-tn48m-poe-psu.c > > > > Ah, so this is not a driver for a power supply from DeltaPSU, > but a power supply from Delta Networks Technology Corporation, > as used in that company's TN48M-POE switch. That is a world > of difference, even though the parent company seems to be the > same. I am not sure if, based on this information, the driver > should claim to be for "Delta DPS-920AB PSU" in the first place. It's actually a PSU from Delta Electronics INC, Delta Networks are just using it inside of the Delta Networks TN48M-DN-P switch. I checked the label on the PSU-s. > > Can you run a block read on MFR_MODEL and MFG_SERIAL ? > That might give us an idea about the actual manufacturer > and model of this power supply. MFG_SERIAL is just a bunch of 0xf-s, but MFR_MODEL has something. However, the Armada 7040 I2C adapter cannot do block reads although it returns 11 bytes but it's just zeros. > > Also, isn't that the same power supply for which you were > trying to add another hwmon driver to display some of its > status information, obtained from some CPLD ? This and one more as the non-PoE version of the TN48M-DN switch has a single 150W PSU that does not support PMBus, but the CPLD always provides presence information and Power Good status. > > Thanks, > Guenter -- Robert Marko Staff Embedded Linux Engineer Sartura Ltd. Lendavska ulica 16a 10000 Zagreb, Croatia Email: robert.marko@xxxxxxxxxx Web: www.sartura.hr
