I bought a RTC DS3231 because of the accuraty of time (2ppm, I was searching an accurate RTC). When I received it, I checked that in the encapsulating it is as well marked like DS3231.
But, after install the RTC, I realized that it seems DS 1307. I executed:
dmesg | grep rtc [ 4.129921] rtc-ds1307 1-0068: registered as rtc0
Why the response is DS1307 instead of DS3231? Is it more or less the same RTC (having the same ppm)?