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https://github.com/zephyrproject-rtos/zephyr
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daeb2a8377
Add STM32N6 clock driver. Supported clocks are LSE, LSI, HSE, HSI, PLL1-4, IC1-20, peripheral clock and CPU clock. Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>
106 lines
3.9 KiB
Plaintext
106 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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SOC_SERIES_STM32N6X)
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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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