On Fri, May 24, 2019 at 06:32:45PM +0300, Dmitry Osipenko wrote: > Hello, > > This series primarily unifies the driver code across all Tegra SoC > generations. In a result the clocksources are allocated per-CPU on > older Tegra's and have a higher rating than the arch-timer, the newer > Tegra210 is getting support for microsecond clocksource and the driver's > code is getting much cleaner. Note that arch-timer usage is discouraged on > all Tegra's due to the time jitter caused by the CPU frequency scaling. I think the limitations are more as follows: Chip timer suffers cpu dvfs jitter can wakeup from cc7 T20 us-timer No Yes T20 twd timer Yes No? T30 us-timer No Yes T30 twd timer Yes No? T114 us-timer No Yes T114 arch timer No Yes T124 us-timer No Yes T124 arch timer No Yes T210 us-timer No Yes T210 arch timer No No T210 clk_m timer No Yes right? Peter.
