Algorithm for waiting for clock stabilization was failing in case when
it was waiting for clock availablity and clock was already available
before function was called. That is because nrfx_clock_is_running
was returning false because XTAL was already started but not yet
running.
Added a check for current LF source, if XTAL is picked that indicates
that RC is already running because of two stage startup procedure.
Added documentation of lfclk_spinwait with explanation of two stage
approach.
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
Pins used for external LF clock source must be configured as
used by peripheral to allow using LFXO on network side.
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
Enabled going to idle when waiting for low frequency clock.
Added 2 stages of starting LF clock when XTAL is used. First
stage is starting RC and then when it is ready XTAL is started.
It is done to get event/interrupt when RC is ready which means
that LF clock is available (but not stable).
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
Added configuration for approach to starting system clock source.
There are 3 options: no wait, wait untill available, wait until
stable.
Added support for those modes in clock control driver which handles
low frequency source clock.
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
Now that device_api attribute is unmodified at runtime, as well as all
the other attributes, it is possible to switch all device driver
instance to be constant.
A coccinelle rule is used for this:
@r_const_dev_1
disable optional_qualifier
@
@@
-struct device *
+const struct device *
@r_const_dev_2
disable optional_qualifier
@
@@
-struct device * const
+const struct device *
Fixes#27399
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
Renamed nrf clock control driver file since it does no long control
POWER peripheral.
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
