On 09/06/2022 16:50:03+0200, Peter Korsgaard wrote: > >>>>> "Srinivas" == Srinivas Neeli <srinivas.neeli@xxxxxxxxxx> writes: > > > Zynqmp RTC controller has a calibration feature to compensate > > time deviation due to input clock inaccuracy. > > Set and get calibration API's are used for setting and getting > > calibration value from the controller calibration register. > > As per RTC spec default calibration value is 0x7FFF. > > Where do you see that? ug1085 rev2.2 still lists: > > Programming Sequences > init rtc > 1. Write the value 0019_8231h into the calibration register, CALIB_WRITE. > This is a very weird value. Last time I had a look, I couldn't find an explanation for it. -- Alexandre Belloni, co-owner and COO, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
