Searched hist:"883 f50ead31cabff321605a6aa7c044438d44b1f" (Results 1 – 1 of 1) sorted by relevance
| /linux/drivers/iio/adc/ |
| H A D | stm32-adc.c | diff 883f50ead31cabff321605a6aa7c044438d44b1f Mon Jun 20 17:47:38 CEST 2022 Olivier Moysan <olivier.moysan@foss.st.com> iio: adc: stm32-adc: disable adc before calibration
The calibration is launched from prepare callback.
The ADC state when entering this function may be unknown as the
ADC may have been left enabled by boot stage.
One prerequisite for ADC calibration is to have ADC in disabled state.
If the calibration is started when ADC is still enabled, the behavior is
unpredictable, and the calibration may fail with a timeout error.
Force ADC to disabled state in stm32h7_adc_selfcalib().
ADC enabling is ensured by stm32h7_adc_enable() call,
before leaving prepare callback.
Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com>
Reviewed-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Link: https://lore.kernel.org/r/20220620154738.801706-3-olivier.moysan@foss.st.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
|