iio: adc: stm32-adc: add checks on adc state

[PATCH 0/2] iio: adc: stm32-adc: add checks on adc state

Posted by Olivier Moysan 3 years, 10 months ago

On ADC startup a calibration is launched.
A prerequisite for ADC calibration is to have ADC in disabled state.
After kernel boot, the ADC state may be unknown as the ADC may have been left enabled by boot stage.

Call ADC disable routine systematically before launching calibration.
Adapt ADC disable routine to perform disabling sequence according to current ADC state.

Olivier Moysan (2):
  iio: adc: stm32-adc: make safe adc disable
  iio: adc: stm32-adc: disable adc before calibration

 drivers/iio/adc/stm32-adc.c | 6 ++++++
 1 file changed, 6 insertions(+)

-- 
2.25.1

Re: [PATCH 0/2] iio: adc: stm32-adc: add checks on adc state

Posted by Jonathan Cameron 3 years, 9 months ago

On Mon, 20 Jun 2022 17:47:36 +0200
Olivier Moysan <olivier.moysan@foss.st.com> wrote:

> On ADC startup a calibration is launched.
> A prerequisite for ADC calibration is to have ADC in disabled state.
> After kernel boot, the ADC state may be unknown as the ADC may have been left enabled by boot stage.
> 
> Call ADC disable routine systematically before launching calibration.
> Adapt ADC disable routine to perform disabling sequence according to current ADC state.
> 
> Olivier Moysan (2):
>   iio: adc: stm32-adc: make safe adc disable
>   iio: adc: stm32-adc: disable adc before calibration
> 
>  drivers/iio/adc/stm32-adc.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 

Series applied to the togreg branch and pushed out as testing
for all the normal reasons.

Thanks,

Jonathan