[riot-notifications] [RIOT-OS/RIOT] sys/ztimer: add ZTIMER_SEC (#15715)

Kaspar Schleiser notifications at github.com
Thu Jan 7 13:53:30 CET 2021

> Btw.: Shouldn't we (unrelated of this PR) use `FEATURES_OPTIONAL += periph_rtt` for `ztimer_msec` and `ztimer_sec` and automatically use `ztimer_periph_rtt` if `periph_rtt` is used?

That's an FAQ by now. The issue is that if ztimer_periph_rtt is used, it'll be used for ztimer_msec. But not all periph_rtt can actually do 1000 or 1024 Hz (or are configured that way). I think we need to add more fine-grained rtt capabilities as features.

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