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soc: arm: stm32g4 add rtc feature on this serie

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This patch enables the rtc clock on the stm32g4 soc
from STMicroelectronics.
Even if the set by default (reset value of theRCC_APB1ENR)
the bit is marked as 1.

Signed-off-by: Francois Ramu <francois.ramu@st.com>
This commit is contained in:
Francois Ramu 2020-08-11 09:25:48 +02:00 committed by Maureen Helm
parent 5291565fef
commit d695746ee6
2 changed files with 4 additions and 4 deletions
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6
drivers/clock_control/clock_stm32g4.c
View file

@ -46,12 +46,12 @@ void config_pll_init(LL_UTILS_PLLInitTypeDef *pllinit)
*/
void config_enable_default_clocks(void)
{
#ifdef CONFIG_CLOCK_STM32_LSE
/* LSE belongs to the back-up domain, enable access.*/
/* Enable the power interface clock */
LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);
#ifdef CONFIG_CLOCK_STM32_LSE
/* LSE belongs to the back-up domain, enable access.*/
/* Set the DBP bit in the Power control register 1 (PWR_CR1) */
LL_PWR_EnableBkUpAccess();
while (!LL_PWR_IsEnabledBkUpAccess()) {

2
dts/arm/st/g4/stm32g4.dtsi
View file

@ -486,7 +486,7 @@
compatible = "st,stm32-rtc";
reg = <0x40002800 0x400>;
interrupts = <41 0>;
clocks = <&rcc STM32_CLOCK_BUS_APB1 0x10000000>;
clocks = <&rcc STM32_CLOCK_BUS_APB1 0x00000400>;
prescaler = <32768>;
status = "disabled";
label = "RTC_0";