altos/stmf0: Leave power interface disabled until needed

[fw/altos] / src / stmf0 / ao_arch_funcs.h

diff --git a/src/stmf0/ao_arch_funcs.h b/src/stmf0/ao_arch_funcs.h
index a0c6e08876cbb012e350b18dc585e02346db9c7c..591ca8a07576fb01a2888754d5f372fc9ab0ac47 100644 (file)
--- a/src/stmf0/ao_arch_funcs.h
+++ b/src/stmf0/ao_arch_funcs.h
@@ -458,6 +458,9 @@ static inline void ao_sleep_mode(void) {
 
        ao_arch_block_interrupts();
 
+       /* Enable power interface clock */
+       stm_rcc.apb1enr |= (1 << STM_RCC_APB1ENR_PWREN);
+       ao_arch_nop();
        stm_scb.scr |= (1 << STM_SCB_SCR_SLEEPDEEP);
        ao_arch_nop();
        stm_pwr.cr |= (1 << STM_PWR_CR_PDDS) | (1 << STM_PWR_CR_LPDS);