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soc: arm: st_stm32: stm32l4: power.c ultra_low_power mode

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STM32L4x power management (ultra_low_power) of Standby mode
and shutdown mode ultra_low_power

Signed-off-by: Marc Desvaux <marc.desvaux-ext@st.com>
This commit is contained in:
Marc Desvaux 2023-03-03 09:27:16 +01:00 • committed by Carles Cufí
commit ba44549ae8
1 changed files with 31 additions and 2 deletions
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33
soc/arm/st_stm32/stm32l4/power.c
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@ -27,6 +27,19 @@ LOG_MODULE_DECLARE(soc, CONFIG_SOC_LOG_LEVEL);
#define RCC_STOP_WAKEUPCLOCK_SELECTED LL_RCC_STOP_WAKEUPCLOCK_HSI
#endif
void enter_ultra_low_power_mode(void)
{
/* Configure CPU core */
/* Enable CPU deep sleep mode */
LL_LPM_EnableDeepSleep();
LL_DBGMCU_DisableDBGStandbyMode();
/* Enter ultra_low-power mode */
for (;;) {
k_cpu_idle();
}
}
void set_mode_stop(uint8_t substate_id)
{
/* ensure the proper wake-up system clock */
@ -54,6 +67,20 @@ void set_mode_stop(uint8_t substate_id)
}
}
void set_mode_standby(void)
{
/* Select standby mode */
LL_PWR_SetPowerMode(LL_PWR_MODE_STANDBY);
enter_ultra_low_power_mode();
}
void set_mode_shutdown(void)
{
/* Select shutdown mode */
LL_PWR_SetPowerMode(LL_PWR_MODE_SHUTDOWN);
enter_ultra_low_power_mode();
}
/* Invoke Low Power/System Off specific Tasks */
__weak void pm_state_set(enum pm_state state, uint8_t substate_id)
{
@ -66,9 +93,11 @@ __weak void pm_state_set(enum pm_state state, uint8_t substate_id)
k_cpu_idle();
break;
case PM_STATE_STANDBY:
__fallthrough;
set_mode_standby();
break;
case PM_STATE_SOFT_OFF:
__fallthrough;
set_mode_shutdown();
break;
default:
LOG_DBG("Unsupported power state %u", state);
return;