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drivers: clock_control: Smartbond: Add runtime frequency support

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RC32K and RCX low power clocks require runtime calibration to work
correctly.
Frequency of those clock can differ from chip to chip, one constant
value from Kconfig may not be best when low power clock (sourced
from RCX or RC32K) is used for system tick.

This code modifies global z_clock_hw_cycles_per_sec variable that
is used when TIMER_READS_ITS_FREQUENCY_AT_RUNTIME is enabled
in Kconfig.

Signed-off-by: Jerzy Kasenberg <jerzy.kasenberg@codecoup.pl>
This commit is contained in:
Jerzy Kasenberg 2024-01-17 10:13:43 +01:00 • committed by Carles Cufí
commit 82ca880fb9
2 changed files with 31 additions and 0 deletions
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soc/renesas/smartbond/da1469x/Kconfig
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@ -14,3 +14,4 @@ config SOC_SERIES_DA1469X
select CLOCK_CONTROL_SMARTBOND
select PLATFORM_SPECIFIC_INIT
select PM_DEVICE if PM
imply TIMER_READS_ITS_FREQUENCY_AT_RUNTIME