[riot-notifications] [RIOT-OS/RIOT] cpu/sam0_common/spi: move out pin muxing into spi_acquire / spi_release (#14107)

benpicco notifications at github.com
Wed May 20 18:03:03 CEST 2020


before:

    acquire/release 1000 times:		11321	11340

with this patch

    acquire/release 1000 times:		15696	15715

so this adds 4.375µs to each acquire()/release() pair.

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