Since CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC is tied to the slow RTC clock
for the nRF53, use the default SYSCLK of 64MHz instead.
Signed-off-by: Maximilian Deubel <maximilian.deubel@nordicsemi.no>
Move low-level GPIO functions to a separate file and use GPIO driver
API if low-level GPIO support is not available for the platform.
Allows alternative pin configuration using only two pins, clk and dio.
Improve binding description.
Signed-off-by: Maximilian Deubel <maximilian.deubel@nordicsemi.no>
Signed-off-by: Johann Fischer <johann.fischer@nordicsemi.no>