4  * SPDX-License-Identifier: Apache-2.0
19 /* Macros to fill up prescaler values */
38 static uint32_t get_bus_clock(uint32_t clock, uint32_t prescaler)  in get_bus_clock()  argument
40 	return clock / prescaler;  in get_bus_clock()
62 	return -ENOTSUP;  in enabled_clock()
73 	if (IN_RANGE(pclken->bus, STM32_PERIPH_BUS_MIN, STM32_PERIPH_BUS_MAX) == 0) {  in stm32_clock_control_on()
75 		return -ENOTSUP;  in stm32_clock_control_on()
78 	sys_set_bits(DT_REG_ADDR(DT_NODELABEL(rcc)) + pclken->bus,  in stm32_clock_control_on()
79 		     pclken->enr);  in stm32_clock_control_on()
81 	temp = sys_read32(DT_REG_ADDR(DT_NODELABEL(rcc)) + pclken->bus);  in stm32_clock_control_on()
94 	if (IN_RANGE(pclken->bus, STM32_PERIPH_BUS_MIN, STM32_PERIPH_BUS_MAX) == 0) {  in stm32_clock_control_off()
96 		return -ENOTSUP;  in stm32_clock_control_off()
99 	sys_clear_bits(DT_REG_ADDR(DT_NODELABEL(rcc)) + pclken->bus,  in stm32_clock_control_off()
100 		       pclken->enr);  in stm32_clock_control_off()
110 	/* At least one alt src clock available */  in stm32_clock_control_configure()
117 	err = enabled_clock(pclken->bus);  in stm32_clock_control_configure()
119 		/* Attempt to configure a src clock not available or not valid */  in stm32_clock_control_configure()
123 	sys_clear_bits(DT_REG_ADDR(DT_NODELABEL(rcc)) + STM32_CLOCK_REG_GET(pclken->enr),  in stm32_clock_control_configure()
124 		       STM32_CLOCK_MASK_GET(pclken->enr) << STM32_CLOCK_SHIFT_GET(pclken->enr));  in stm32_clock_control_configure()
125 	sys_set_bits(DT_REG_ADDR(DT_NODELABEL(rcc)) + STM32_CLOCK_REG_GET(pclken->enr),  in stm32_clock_control_configure()
126 		     STM32_CLOCK_VAL_GET(pclken->enr) << STM32_CLOCK_SHIFT_GET(pclken->enr));  in stm32_clock_control_configure()
130 	/* No src clock available: Not supported */  in stm32_clock_control_configure()
131 	return -ENOTSUP;  in stm32_clock_control_configure()
169 	 * Get AHB Clock (= SystemCoreClock = SYSCLK/prescaler)  in stm32_clock_control_get_subsys_rate()
183 		/* PLL is the SYSCLK source, use 'ahb5-prescaler' */  in stm32_clock_control_get_subsys_rate()
187 		/* PLL is not the SYSCLK source, use 'ahb5-div'(if set) */  in stm32_clock_control_get_subsys_rate()
198 	switch (pclken->bus) {  in stm32_clock_control_get_subsys_rate()
271 		return -ENOTSUP;  in stm32_clock_control_get_subsys_rate()
274 	if (pclken->div) {  in stm32_clock_control_get_subsys_rate()
275 		*rate /= (pclken->div + 1);  in stm32_clock_control_get_subsys_rate()
288 	if (IN_RANGE(pclken->bus, STM32_PERIPH_BUS_MIN, STM32_PERIPH_BUS_MAX) == true) {  in stm32_clock_control_get_status()
290 		if ((sys_read32(DT_REG_ADDR(DT_NODELABEL(rcc)) + pclken->bus) & pclken->enr)  in stm32_clock_control_get_status()
291 		    == pclken->enr) {  in stm32_clock_control_get_status()
298 		if (enabled_clock(pclken->bus) == 0) {  in stm32_clock_control_get_status()
326 		return -ERANGE;  in get_vco_input_range()
365 	 * Re-enable HSE clock if required after switch source to HSI  in stm32_clock_switch_to_hsi()
398 		return -ENOTSUP;  in set_up_plls()
470 		/* LSI belongs to the back-up domain, enable access.*/  in set_up_fixed_clock_sources()
486 		/* LSE belongs to the back-up domain, enable access.*/  in set_up_fixed_clock_sources()
533 		 * was already configured as sysclk src by bootloader.  in stm32_clock_control_init()
575 		/* PLL is the SYSCLK source, use 'ahb5-prescaler' */  in stm32_clock_control_init()
578 		/* PLL is not the SYSCLK source, use 'ahb5-div'(if set) */  in stm32_clock_control_init()
613 	/* Set bus prescalers prescaler */  in stm32_clock_control_init()