soc/st/stm32/stm32wbax/poweroff.c

/*
 * Copyright (c) 2023 Nordic Semiconductor ASA
 * Copyright (c) 2024 STMicroelectronics
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <zephyr/sys/poweroff.h>
#include <zephyr/toolchain.h>
#include <zephyr/drivers/misc/stm32_wkup_pins/stm32_wkup_pins.h>

#include <stm32_ll_cortex.h>
#include <stm32_ll_pwr.h>

void z_sys_poweroff(void)
{
#ifdef CONFIG_STM32_WKUP_PINS
	stm32_pwr_wkup_pin_cfg_pupd();
#endif /* CONFIG_STM32_WKUP_PINS */

	LL_PWR_ClearFlag_WU();

	LL_PWR_SetPowerMode(LL_PWR_MODE_STANDBY);
	LL_PWR_SetRadioSBRetention(LL_PWR_RADIO_SB_NO_RETENTION);
	LL_PWR_SetSRAM1SBRetention(LL_PWR_SRAM1_SB_NO_RETENTION);
	LL_PWR_SetSRAM2SBRetention(LL_PWR_SRAM2_SB_NO_RETENTION);
	LL_LPM_EnableDeepSleep();

	__WFI();

	CODE_UNREACHABLE;
}