diff options
| author | Keith Packard <keithp@keithp.com> | 2019-07-16 11:02:56 -0700 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2019-07-16 11:02:56 -0700 |
| commit | 009d56b4f03c1ba3c9a36bdb54c772ad21844057 (patch) | |
| tree | 67091b67b767e9d565ebca7212e493aa92499633 /src/stmf0/ao_arch_funcs.h | |
| parent | e879d739c394602043e8ed512ad1a433fbf96c1c (diff) | |
altos/stmf0: Leave power interface disabled until needed
We only need the power interface when placing the chip in the lowest
power state, so don't power up the power interface clock at startup,
instead wait until later.
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'src/stmf0/ao_arch_funcs.h')
| -rw-r--r-- | src/stmf0/ao_arch_funcs.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/stmf0/ao_arch_funcs.h b/src/stmf0/ao_arch_funcs.h index a0c6e088..591ca8a0 100644 --- 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); |