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# Clock controller driver configuration options
# Copyright (c) 2016 Nordic Semiconductor ASA
# SPDX-License-Identifier: Apache-2.0
config CLOCK_CONTROL_NRF_FORCE_ALT
bool
depends on SOC_COMPATIBLE_NRF
help
This option can be enabled to force an alternative implementation
of the clock control driver.
menuconfig CLOCK_CONTROL_NRF
bool "NRF Clock controller support"
depends on SOC_COMPATIBLE_NRF
select NRFX_CLOCK if !CLOCK_CONTROL_NRF_FORCE_ALT
default y
help
Enable support for the Nordic Semiconductor nRFxx series SoC clock
driver.
if CLOCK_CONTROL_NRF
config CLOCK_CONTROL_NRF_SHELL
bool "Shell commands"
depends on SHELL
default y if SHELL
choice CLOCK_CONTROL_NRF_SOURCE
prompt "32KHz clock source"
default CLOCK_CONTROL_NRF_K32SRC_XTAL
config CLOCK_CONTROL_NRF_K32SRC_RC
bool "RC Oscillator"
config CLOCK_CONTROL_NRF_K32SRC_XTAL
select NRFX_CLOCK_LFXO_TWO_STAGE_ENABLED if (!SOC_SERIES_BSIM_NRFXX && \
!CLOCK_CONTROL_NRF_FORCE_ALT)
bool "Crystal Oscillator"
config CLOCK_CONTROL_NRF_K32SRC_SYNTH
depends on !SOC_SERIES_NRF91X
bool "Synthesized from HFCLK"
config CLOCK_CONTROL_NRF_K32SRC_EXT_LOW_SWING
depends on SOC_SERIES_NRF52X
select NRFX_CLOCK_LFXO_TWO_STAGE_ENABLED if !CLOCK_CONTROL_NRF_FORCE_ALT
bool "External low swing"
config CLOCK_CONTROL_NRF_K32SRC_EXT_FULL_SWING
depends on SOC_SERIES_NRF52X
select NRFX_CLOCK_LFXO_TWO_STAGE_ENABLED if !CLOCK_CONTROL_NRF_FORCE_ALT
bool "External full swing"
endchoice
config CLOCK_CONTROL_NRF_K32SRC_RC_CALIBRATION
bool "Enable LF clock calibration"
depends on !SOC_SERIES_NRF91X && CLOCK_CONTROL_NRF_K32SRC_RC
default y
help
If calibration is disabled when RC is used for low frequency clock then
accuracy of the low frequency clock will degrade. Disable on your own
risk.
if CLOCK_CONTROL_NRF_K32SRC_RC_CALIBRATION
config CLOCK_CONTROL_NRF_CALIBRATION_LF_ALWAYS_ON
bool "LF clock is always on"
default y if NRF_RTC_TIMER
help
If RTC is used as system timer then LF clock is always on and handling
can be simplified.
config CLOCK_CONTROL_NRF_CALIBRATION_PERIOD
int "Calibration opportunity period in milliseconds"
default 4000
help
Periodically, calibration action is performed. Action includes
temperature measurement followed by clock calibration. Calibration may
be skipped if temperature change (compared to measurement of previous
calibration) did not exceeded CLOCK_CONTROL_NRF_CALIBRATION_TEMP_DIFF
and number of consecutive skips did not exceeded
CLOCK_CONTROL_NRF_CALIBRATION_MAX_SKIP.
config CLOCK_CONTROL_NRF_CALIBRATION_MAX_SKIP
int "Maximum number of calibration skips"
default 1
range 0 255
help
Calibration is skipped when temperature change since last calibration
was less than configured threshold. If number of consecutive skips
reaches configured value then calibration is performed
unconditionally. Set to 0 to perform calibration periodically
regardless of temperature change.
config CLOCK_CONTROL_NRF_CALIBRATION_TEMP_DIFF
int "Temperature change triggering calibration (in 0.25 degree units)"
default 2
help
Calibration is triggered if the temperature has changed by at least
this amount since the last calibration.
config CLOCK_CONTROL_NRF_CALIBRATION_DEBUG
bool "Calibration instrumentation"
help
Enables retrieving debug information like number of performed or
skipped calibrations.
config CLOCK_CONTROL_NRF_USES_TEMP_SENSOR
bool
depends on HAS_HW_NRF_TEMP
default y if CLOCK_CONTROL_NRF_CALIBRATION_MAX_SKIP > 0 && \
CLOCK_CONTROL_NRF_CALIBRATION_TEMP_DIFF > 0
select TEMP_NRF5
select SENSOR
endif # CLOCK_CONTROL_NRF_K32SRC_RC_CALIBRATION
choice CLOCK_CONTROL_NRF_ACCURACY_PPM
prompt "32KHz clock accuracy"
default CLOCK_CONTROL_NRF_K32SRC_500PPM if CLOCK_CONTROL_NRF_K32SRC_RC
default CLOCK_CONTROL_NRF_K32SRC_50PPM
config CLOCK_CONTROL_NRF_K32SRC_500PPM
bool "251 ppm to 500 ppm"
config CLOCK_CONTROL_NRF_K32SRC_250PPM
bool "151 ppm to 250 ppm"
config CLOCK_CONTROL_NRF_K32SRC_150PPM
bool "101 ppm to 150 ppm"
config CLOCK_CONTROL_NRF_K32SRC_100PPM
bool "76 ppm to 100 ppm"
config CLOCK_CONTROL_NRF_K32SRC_75PPM
bool "51 ppm to 75 ppm"
config CLOCK_CONTROL_NRF_K32SRC_50PPM
bool "31 ppm to 50 ppm"
config CLOCK_CONTROL_NRF_K32SRC_30PPM
bool "21 ppm to 30 ppm"
config CLOCK_CONTROL_NRF_K32SRC_20PPM
bool "0 ppm to 20 ppm"
endchoice
config CLOCK_CONTROL_NRF_ACCURACY
int
default 500 if CLOCK_CONTROL_NRF_K32SRC_500PPM
default 250 if CLOCK_CONTROL_NRF_K32SRC_250PPM
default 150 if CLOCK_CONTROL_NRF_K32SRC_150PPM
default 100 if CLOCK_CONTROL_NRF_K32SRC_100PPM
default 75 if CLOCK_CONTROL_NRF_K32SRC_75PPM
default 50 if CLOCK_CONTROL_NRF_K32SRC_50PPM
default 30 if CLOCK_CONTROL_NRF_K32SRC_30PPM
default 20 if CLOCK_CONTROL_NRF_K32SRC_20PPM
endif # CLOCK_CONTROL_NRF