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soc: arm: stm32wb low power substates

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The low power states 0∕1∕2 are added to the stm32wb.
The substate-id is mapping the same Zephyr power state.
They correspond to the stm32wb low power stop0/1/2 modes.

Signed-off-by: Francois Ramu <francois.ramu@st.com>
This commit is contained in:
Francois Ramu 2021-03-25 16:21:16 +01:00 • committed by Anas Nashif
commit 117796aea9
1 changed files with 8 additions and 6 deletions
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14
soc/arm/st_stm32/stm32wb/power.c
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@ -27,7 +27,7 @@ void pm_power_state_set(struct pm_state_info info)
}
switch (info.substate_id) {
case 0: /* this corresponds to the STOP0 mode: */
case 1: /* this corresponds to the STOP0 mode: */
/* ensure HSI is the wake-up system clock */
LL_RCC_SetClkAfterWakeFromStop(LL_RCC_STOP_WAKEUPCLOCK_HSI);
/* enter STOP0 mode */
@ -36,15 +36,16 @@ void pm_power_state_set(struct pm_state_info info)
/* enter SLEEP mode : WFE or WFI */
k_cpu_idle();
break;
case 1: /* this corresponds to the STOP1 mode: */
case 2: /* this corresponds to the STOP1 mode: */
/* ensure HSI is the wake-up system clock */
LL_RCC_SetClkAfterWakeFromStop(LL_RCC_STOP_WAKEUPCLOCK_HSI);
/* enter STOP1 mode */
LL_PWR_SetPowerMode(LL_PWR_MODE_STOP1);
LL_LPM_EnableDeepSleep();
/* enter SLEEP mode : WFE or WFI */
k_cpu_idle();
break;
case 2: /* this corresponds to the STOP2 mode: */
case 3: /* this corresponds to the STOP2 mode: */
/* ensure HSI is the wake-up system clock */
LL_RCC_SetClkAfterWakeFromStop(LL_RCC_STOP_WAKEUPCLOCK_HSI);
#ifdef PWR_CR1_RRSTP
@ -53,6 +54,7 @@ void pm_power_state_set(struct pm_state_info info)
/* enter STOP2 mode */
LL_PWR_SetPowerMode(LL_PWR_MODE_STOP2);
LL_LPM_EnableDeepSleep();
/* enter SLEEP mode : WFE or WFI */
k_cpu_idle();
break;
default:
@ -68,11 +70,11 @@ void pm_power_state_exit_post_ops(struct pm_state_info info)
LOG_DBG("Unsupported power state %u", info.state);
} else {
switch (info.substate_id) {
case 0: /* STOP0 */
case 1: /* STOP0 */
__fallthrough;
case 1: /* STOP1 */
case 2: /* STOP1 */
__fallthrough;
case 2: /* STOP2 */
case 3: /* STOP2 */
LL_LPM_DisableSleepOnExit();
LL_LPM_EnableSleep();
break;