linux-kernel - Re: [PATCH 0/3] iio: adc: stm32: add smart calibration

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Message-ID: <f7a2a680-4879-b6cf-3546-e890b3c96e32@foss.st.com>
Date:   Wed, 23 Nov 2022 12:04:36 +0100
From:   Fabrice Gasnier <fabrice.gasnier@...s.st.com>
To:     Olivier Moysan <olivier.moysan@...s.st.com>,
        Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>
CC:     <linux-iio@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/3] iio: adc: stm32: add smart calibration

On 11/15/22 11:31, Olivier Moysan wrote:
> Refine offset and linear calibration strategy for STM32MP15 and
> STM32MP13 SoCs:
> 
> - offset calibration
> This calibration depends on factors such as temperature and voltage.
> As it is not time consuming, it's worth doing it on each ADC
> start, to get the best accuracy. There is no need to save these data.
> 
> - linear calibration
> This calibration is basically SoC dependent, so it can be done only once.
> When this calibration has been performed at boot stage, the ADC kernel
> driver can retrieve the calibration data from the ADC registers.
> Otherwise, the linear calibration is performed once by the ADC driver.
> The backup of these data, allows to restore them on successive ADC starts.
> 
> Olivier Moysan (3):
>   iio: adc: stm32-adc: smart calibration support
>   iio: adc: stm32-adc: improve calibration error log
>   iio: adc: stm32-adc: add debugfs to read raw calibration result

Hi Olivier,

For the series, you can add my:
Reviewed-by: Fabrice Gasnier <fabrice.gasnier@...s.st.com>

Thanks,
Fabrice

> 
>  drivers/iio/adc/stm32-adc-core.h |   1 +
>  drivers/iio/adc/stm32-adc.c      | 135 ++++++++++++++++++-------------
>  2 files changed, 78 insertions(+), 58 deletions(-)
>