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drivers: adc: stm32: disable ADC before writing oversampling bits for g0

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Added the STM32G0X SOC series to the list of SOC that need to disable the
ADC while setting the oversampling bits to prevent writing over the
CKMODE bits.

Signed-off-by: Alexandre Poizat <apoizat@kalrayinc.com>
This commit is contained in:
Alexandre Poizat 2024-03-06 15:10:21 +01:00 • committed by Alberto Escolar
commit 0195f774ba
1 changed files with 6 additions and 3 deletions
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9
drivers/adc/adc_stm32.c
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@ -641,11 +641,14 @@ static const uint32_t table_oversampling_ratio[] = {
*/
static void adc_stm32_oversampling_scope(ADC_TypeDef *adc, uint32_t ovs_scope)
{
#if defined(CONFIG_SOC_SERIES_STM32L0X) || \
#if defined(CONFIG_SOC_SERIES_STM32G0X) || \
defined(CONFIG_SOC_SERIES_STM32L0X) || \
defined(CONFIG_SOC_SERIES_STM32WLX)
/*
* setting OVS bits is conditioned to ADC state: ADC must be disabled
* or enabled without conversion on going : disable it, it will stop
* Setting OVS bits is conditioned to ADC state: ADC must be disabled
* or enabled without conversion on going : disable it, it will stop.
* For the G0 series, ADC must be disabled to prevent CKMODE bitfield
* from getting reset, see errata ES0418 section 2.6.4.
*/
if (LL_ADC_GetOverSamplingScope(adc) == ovs_scope) {
return;