zephyr/soc/arm/nordic_nrf/nrf51
Peter A. Bigot da3f7feaf8 soc: arm: nordic_nrf: unrevert provide custom busy_wait implementations
This reverts commit bd24b31139.

While the test case failure described in #14186 is associated with the
cycle-based busy-wait implementation, that test is fragile, and fails
less frequently once the incongruence between ticks-per-second and the
32 KiHz RTC clock are resolved.  It also assumes that the system clock
is more stable than the infrastructure underlying the the busy-wait
implementation, which is not necessarily true.

The gross inaccuracies in the standard busy-wait on Nordic described in
issue #11626 justify restoring the custom solution.

As this applies to all Nordic devices, move the setting to the top-level
Kconfig.defconfig.

See: https://github.com/zephyrproject-rtos/zephyr/issues/11626#issuecomment-487243369

Signed-off-by: Peter A. Bigot <pab@pabigot.com>
2019-05-07 14:32:21 +02:00
..
CMakeLists.txt license: cleanup: add SPDX Apache-2.0 license identifier 2019-04-07 08:45:22 -04:00
Kconfig.defconfig.nrf51822_QFAA
Kconfig.defconfig.nrf51822_QFAB
Kconfig.defconfig.nrf51822_QFAC
Kconfig.defconfig.series soc: arm: nordic_nrf: change default SYS_CLOCKS_PER_SEC 2019-05-07 14:32:21 +02:00
Kconfig.series power: modify HAS_STATE_SLEEP_ Kconfig options 2019-03-26 13:27:55 -04:00
Kconfig.soc
dts_fixup.h license: cleanup: add SPDX Apache-2.0 license identifier 2019-04-07 08:45:22 -04:00
linker.ld
power.c power: modify HAS_STATE_SLEEP_ Kconfig options 2019-03-26 13:27:55 -04:00
soc.c soc: arm: nordic_nrf: unrevert provide custom busy_wait implementations 2019-05-07 14:32:21 +02:00
soc.h power: Rework OS <-> Application interface 2019-02-19 13:25:36 -05:00