Commit 8edcf028 authored Aug 31, 2021 by Erwan Gouriou Committed by Christopher Friedt Sep 03, 2021

soc/arm: stm32wb: Default C2 power mode to SHUTDOWN



Low power modes entry on stm32wb depends on requests coming from both
cores, with no consideration of the fact that C2 is booted  or not.

By default, set C2 power mode to shutdown at C1 start up.
If required, it will be updated by C2.
In case C2 is not started, this will allow C1 to enter any power mode
with no dependency on C2.

Fixes #38173

Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>

parent d33017b4

soc/arm/st_stm32/stm32wb/soc.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -45,6 +45,10 @@ static int stm32wb_init(const struct device *arg)
		/* At reset, system core clock is set to 4 MHz from MSI */
		SystemCoreClock = 4000000;

		/* Set C2 Power Mode to shutdown */
		/* It will be udated by C2 when required */
		LL_C2_PWR_SetPowerMode(LL_PWR_MODE_SHUTDOWN);

		return 0;
		}

Admin message