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fix(core): Enable Backup SRAM in VBAT mode [no changelog]

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kopecdav 2025-04-28 17:52:08 +02:00 committed by kopecdav
parent dba76ea3e8
commit dec252df77
1 changed files with 8 additions and 0 deletions
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8
core/embed/sys/powerctl/stm32u5/powerctl.c
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@ -99,6 +99,14 @@ bool powerctl_hibernate(void) {
return false;
}
// TEMPORARY FIX:
// Enable Backup domain retentaion in VBAT mode before entering the
// hiberbation. BREN bit can be accessed only in LDO mode.
__HAL_RCC_PWR_CLK_ENABLE();
PWR->CR3 &= ~PWR_CR3_REGSEL; // Select LDO mode
PWR->BDCR1 |= PWR_BDCR1_BREN;
if (!npm1300_enter_shipmode()) {
return false;
}