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https://github.com/zephyrproject-rtos/zephyr
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a36a478954
Reworked calibration to not use HW platform which is not available on some platforms (nrf53) and does not bring any value compared to using system timer. Switched to use k_timer. Additionally, improved calibration algorithm to request also LF clock before starting calibration. This simplifies the algorithm because it does not need to support disabling low frequency clock which in calibration. Tests has been updated and simplified. Former tests relied on HW timer event. Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
131 lines
3.5 KiB
Plaintext
131 lines
3.5 KiB
Plaintext
# Clock controller driver configuration options
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# Copyright (c) 2016 Nordic Semiconductor ASA
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# SPDX-License-Identifier: Apache-2.0
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config CLOCK_CONTROL_NRF_FORCE_ALT
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bool
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depends on SOC_COMPATIBLE_NRF
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help
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This option can be enabled to force an alternative implementation
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of the clock control driver.
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menuconfig CLOCK_CONTROL_NRF
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bool "NRF Clock controller support"
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depends on SOC_COMPATIBLE_NRF
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depends on !CLOCK_CONTROL_NRF_FORCE_ALT
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default y
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help
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Enable support for the Nordic Semiconductor nRFxx series SoC clock
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driver.
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if CLOCK_CONTROL_NRF
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choice CLOCK_CONTROL_NRF_SOURCE
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prompt "32KHz clock source"
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default CLOCK_CONTROL_NRF_K32SRC_XTAL
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config CLOCK_CONTROL_NRF_K32SRC_RC
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bool "RC Oscillator"
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config CLOCK_CONTROL_NRF_K32SRC_XTAL
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bool "Crystal Oscillator"
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config CLOCK_CONTROL_NRF_K32SRC_SYNTH
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depends on !SOC_SERIES_NRF91X
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bool "Synthesized from HFCLK"
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config CLOCK_CONTROL_NRF_K32SRC_EXT_LOW_SWING
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depends on SOC_SERIES_NRF52X
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bool "External low swing"
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config CLOCK_CONTROL_NRF_K32SRC_EXT_FULL_SWING
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depends on SOC_SERIES_NRF52X
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bool "External full swing"
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endchoice
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config CLOCK_CONTROL_NRF_K32SRC_RC_CALIBRATION
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bool
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depends on !SOC_SERIES_NRF91X
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default y if CLOCK_CONTROL_NRF_K32SRC_RC
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if CLOCK_CONTROL_NRF_K32SRC_RC_CALIBRATION
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config CLOCK_CONTROL_NRF_CALIBRATION_PERIOD
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int "Calibration opportunity period in milliseconds"
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default 4000
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help
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Periodically, calibration action is performed. Action includes
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temperature measurement followed by clock calibration. Calibration may
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be skipped if temperature change (compared to measurement of previous
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calibration) did not exceeded CLOCK_CONTROL_NRF_CALIBRATION_TEMP_DIFF
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and number of consecutive skips did not exceeded
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CLOCK_CONTROL_NRF_CALIBRATION_MAX_SKIP.
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config CLOCK_CONTROL_NRF_CALIBRATION_MAX_SKIP
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int "Maximum number of calibration skips"
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default 1
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range 0 255
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help
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Calibration is skipped when temperature change since last calibration
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was less than configured threshold. If number of consecutive skips
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reaches configured value then calibration is performed
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unconditionally. Set to 0 to perform calibration periodically
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regardless of temperature change.
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config CLOCK_CONTROL_NRF_CALIBRATION_TEMP_DIFF
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int "Temperature change triggering calibration (in 0.25 degree units)"
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default 2
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help
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Calibration is triggered if the temperature has changed by at least
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this amount since the last calibration.
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config CLOCK_CONTROL_NRF_CALIBRATION_DEBUG
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bool "Calibration instrumentation"
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help
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Enables retrieving debug information like number of performed or
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skipped calibrations.
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config CLOCK_CONTROL_NRF_USES_TEMP_SENSOR
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bool
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default y if CLOCK_CONTROL_NRF_CALIBRATION_MAX_SKIP > 0 && \
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CLOCK_CONTROL_NRF_CALIBRATION_TEMP_DIFF > 0
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select TEMP_NRF5
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select SENSOR
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endif # CLOCK_CONTROL_NRF_K32SRC_RC_CALIBRATION
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choice CLOCK_CONTROL_NRF_ACCURACY
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prompt "32KHz clock accuracy"
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default CLOCK_CONTROL_NRF_K32SRC_500PPM if CLOCK_CONTROL_NRF_K32SRC_RC
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default CLOCK_CONTROL_NRF_K32SRC_20PPM
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config CLOCK_CONTROL_NRF_K32SRC_500PPM
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bool "251 ppm to 500 ppm"
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config CLOCK_CONTROL_NRF_K32SRC_250PPM
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bool "151 ppm to 250 ppm"
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config CLOCK_CONTROL_NRF_K32SRC_150PPM
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bool "101 ppm to 150 ppm"
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config CLOCK_CONTROL_NRF_K32SRC_100PPM
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bool "76 ppm to 100 ppm"
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config CLOCK_CONTROL_NRF_K32SRC_75PPM
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bool "51 ppm to 75 ppm"
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config CLOCK_CONTROL_NRF_K32SRC_50PPM
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bool "31 ppm to 50 ppm"
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config CLOCK_CONTROL_NRF_K32SRC_30PPM
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bool "21 ppm to 30 ppm"
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config CLOCK_CONTROL_NRF_K32SRC_20PPM
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bool "0 ppm to 20 ppm"
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endchoice
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endif # CLOCK_CONTROL_NRF
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