[riot-notifications] [RIOT-OS/RIOT] sys/ztimer/Makefilde.dep: periph_rtt as FEATURES_OPTIONAL (#14013)

Juergen Fitschen notifications at github.com
Mon May 4 20:58:30 CEST 2020


Another thought: To gain any power saving benefit by sourcing `ZTIMER_MSEC` from `periph_rtt`, the board must also specify `CONFIG_ZTIMER_USEC_REQUIRED_PM_MODE` (introduced in #13722) to block and unblock the right pm mode. So some explicit configuration must take place anyhow.

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