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f0ba72e210
Rely on the DTS to get the MCO input source clock and prescaler. DTS configuration has been introduced and Kconfig method deprecated two releases before and can be then safely removed. Signed-off-by: Francois Ramu <francois.ramu@st.com>
105 lines
3.9 KiB
Plaintext
105 lines
3.9 KiB
Plaintext
# STM32 MCU clock control driver config
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# Copyright (c) 2017 Linaro
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# Copyright (c) 2017 RnDity Sp. z o.o.
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# SPDX-License-Identifier: Apache-2.0
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menuconfig CLOCK_CONTROL_STM32_CUBE
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bool "STM32 Reset & Clock Control"
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depends on SOC_FAMILY_STM32
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default y
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select USE_STM32_LL_UTILS
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select USE_STM32_LL_RCC if (SOC_SERIES_STM32MP1X || SOC_SERIES_STM32H7X || \
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SOC_SERIES_STM32H7RSX || SOC_SERIES_STM32F4X || SOC_SERIES_STM32F7X)
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select RUNTIME_NMI if ($(dt_nodelabel_enabled,clk_hse) && \
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$(dt_nodelabel_has_prop,clk_hse,css-enabled))
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help
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Enable driver for Reset & Clock Control subsystem found
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in STM32 family of MCUs
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if CLOCK_CONTROL_STM32_CUBE
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DT_STM32_HSE_CLOCK := $(dt_nodelabel_path,clk_hse)
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DT_STM32_HSE_CLOCK_FREQ := $(dt_node_int_prop_int,$(DT_STM32_HSE_CLOCK),clock-frequency)
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config CLOCK_STM32_HSE_CLOCK
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int "HSE clock value"
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default "$(DT_STM32_HSE_CLOCK_FREQ)" if "$(dt_nodelabel_enabled,clk_hse)"
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default 8000000
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help
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Value of external high-speed clock (HSE). This symbol could be optionally
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configured using device tree by setting "clock-frequency" value of clk_hse
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node. For instance:
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&clk_hse{
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status = "okay";
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clock-frequency = <DT_FREQ_M(25)>;
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};
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Note: Device tree configuration is overridden when current symbol is set:
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CONFIG_CLOCK_STM32_HSE_CLOCK=32000000
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config CLOCK_STM32_MUX
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bool "STM32 clock mux driver"
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default y
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depends on DT_HAS_ST_STM32_CLOCK_MUX_ENABLED
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help
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Enable driver for STM32 clock mux which don't match an
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existing clock hardware block but allows to select a clock
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for a specific domain. For instance per_ck clock on STM32H7 or
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CLK48 clock
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menu "STM32WB0 LSI options"
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depends on DT_HAS_ST_STM32WB0_LSI_CLOCK_ENABLED
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config STM32WB0_LSI_MEASUREMENT_WINDOW
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int "Size of LSI measurement window (in periods)"
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default 32
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range 23 256
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help
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Size of the LSI measurement window (# of LSI periods)
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The measurement process involves waiting for a certain amount of LSI periods
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to occur, in order to determine precisely the LSI period, and thus frequency.
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This property controls how much LSI periods are required for each measure.
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Bigger window sizes increase accuracy of the measure, but increase the time
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needed to complete it. Since fLSI >= 24kHz, increasing the measurement window
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size makes each measure roughly 42µs slower in the worst case.
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Minimal value is a recommendation from RM0505 Rev.1 §25.8.2, and maximum
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value is a hardware limitation.
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config STM32WB0_LSI_RUNTIME_MEASUREMENT_INTERVAL
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int "LSI run-time measurement interval (ms)"
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default 0
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help
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Interval at which runtime measurements should be performed, in milliseconds
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Since the LSI RC frequency is affected by temperature, which is not stable
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across time, it is recommended to perform measurements of the LSI frequency
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at regular intervals to obtain better accuracy.
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This property enables runtime LSI measurement if present. In this case,
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a background thread is created and performs LSI measurements, sleeping
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the amount of time specified in this property between each measure. This
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thread is also tasked with updating the control registers of peripherals
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affected by slow clock drift such as RTC or IWDG, in collaboration with
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the peripherals' drivers. Note that this increases the memory footprint
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of the clock control driver, and may increase power consumption.
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Setting this option to the default value of "0" disables runtime frequency
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measurements - the result of a single measure performed at boot will be
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treated as LSI frequency for the lifetime of the application.
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endmenu # DT_HAS_ST_STM32WB0_LSI_CLOCK_ENABLED
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# Micro-controller Clock Output (MCO) configuration options
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config CLOCK_STM32_MCO
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bool
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default y
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depends on DT_HAS_ST_STM32_CLOCK_MCO_ENABLED || DT_HAS_ST_STM32F1_CLOCK_MCO_ENABLED
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help
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Allows to output various different clock sources onto the MCO pin
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using a configurable prescaler.
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endif # CLOCK_CONTROL_STM32_CUBE
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