On 23/05/2019 22:29:36+0530, Jeffrin Thalakkottoor wrote: > I get the following result when i run "rtctest" > please see the following.... > -----------------x------------------------x----------------- > $pwd > /home/jeffrin/upstream/linux-kselftest/tools/testing/selftests/rtc > $./rtctest > [==========] Running 7 tests from 2 test cases. > [ RUN ] rtc.date_read > rtctest.c:32:rtc.date_read:Expected -1 (18446744073709551615) != > self->fd (18446744073709551615) > rtc.date_read: Test terminated by assertion Your user probably doesn't have access to the rtc device file. -- Alexandre Belloni, Bootlin Embedded Linux and Kernel engineering https://bootlin.com