On Tue, 08 Nov 2022 10:45:55 +0530 Chan Kim wrote: > > Hello all, > > I fixed this problem and now the time measurement and commands like sleep > works just fine. > > Two points I fixed : > - I had 'clock-frequency' property set with wrong frequency in my timer node > in the device tree so I removed it. > The document says when the boot loader sets CNTFRQ register correctly, we > don't have to provide 'clock-frequency' property value. > - The correct frequency of the system counter (arm464) was 10MHz in our > board. Previously I set CNTFRQ register with 5MHz but I fixed it to 10MHz. > > One more thing to note. The system counter has both system register view and > memory mapped register view. > Previously I said even if I set cntfrq_el0 register with some values (using > system register, "msr cntfrq_el0, COUNTER_FREQUENCY") it did not change > anything. > It was because I set the same register with old value (5MHz) using the > memory mapped access later (like with "writel(COUNTER_FREQUENCY, > 0x4c018020);"). > > Hope this helps someone later. > Thank you! > > Chan Kim > Glad to know. Thanks for sharing the updates and the cause behind it! Thanks, Siddh _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
