linux-kernel - Re: [PATCH v4 0/8] iio: stm32-adc: add support of adc for stm32mp13

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Date:   Fri, 14 Oct 2022 14:52:49 +0200
From:   Fabrice Gasnier <fabrice.gasnier@...s.st.com>
To:     Olivier Moysan <olivier.moysan@...s.st.com>,
        Rob Herring <robh+dt@...nel.org>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <devicetree@...r.kernel.org>
Subject: Re: [PATCH v4 0/8] iio: stm32-adc: add support of adc for stm32mp13

On 10/12/22 16:21, Olivier Moysan wrote:
> On STM32MP13 SoCs, each ADC peripheral has a single ADC block.
> These ADC peripherals, ADC1 and ADC2, are fully independent.
> The STM32MP131 SoC provides only ADC2, while other STM32MP13x
> SoCs provide both ADC1 and ADC2.
> 
> The STM32MP13 ADC features and characteristics are slightly
> different from STM32MP15 ADC ones, requiring a specific support
> in the driver.
> 
> This patchset enables the ADC peripheral on STM32MP135F-DK board.
> 
> On STM32MP135F-DK board the ADC is connected to VDDA voltage
> provided by the PMIC LOD1 supply, which has to be enabled through
> SCMI regulator framework.
> This serie introduces a fixed regulator to allow ADC probing,
> while SCMI regulators support is not available. This does
> not ensure ADC regulator enabling however.


Hi Olivier,

I've one tiny remark on PATCH 5/8, "ARM: dts: stm32: add adc support to
stm32mp13"

With that fixed, for the whole series, you can add my:

Reviewed-by: Fabrice Gasnier <fabrice.gasnier@...s.st.com>

Thanks,
Fabrice

> 
> Changes in v4:
> - reformat patch 1 commit message
> - reorder adc1 node
> 
> v3:
> - Remove blank line in tag block
> - Use HZ_PER_MHZ unit for max frequency definition
> - Coding style updates
> 
> v2:
> - Rework commit message length
> - Add missing spaces
> - Remove useless defines
> 
> Olivier Moysan (8):
>   iio: adc: stm32-adc: fix channel sampling time init
>   dt-bindings: iio: adc: stm32-adc: add stm32mp13 compatibles
>   iio: adc: stm32-adc: add stm32mp13 support
>   iio: adc: stm32: manage min sampling time on all internal channels
>   ARM: dts: stm32: add adc support to stm32mp13
>   ARM: dts: stm32: add adc pins muxing on stm32mp135f-dk
>   ARM: dts: stm32: add dummy vdd_adc regulator on stm32mp135f-dk
>   ARM: dts: stm32: add adc support on stm32mp135f-dk
> 
>  .../bindings/iio/adc/st,stm32-adc.yaml        |  68 ++++-
>  arch/arm/boot/dts/stm32mp13-pinctrl.dtsi      |   7 +
>  arch/arm/boot/dts/stm32mp131.dtsi             |  43 +++
>  arch/arm/boot/dts/stm32mp133.dtsi             |  31 +++
>  arch/arm/boot/dts/stm32mp135f-dk.dts          |  33 +++
>  drivers/iio/adc/stm32-adc-core.c              |  30 ++-
>  drivers/iio/adc/stm32-adc-core.h              |  30 +++
>  drivers/iio/adc/stm32-adc.c                   | 247 +++++++++++++++---
>  8 files changed, 443 insertions(+), 46 deletions(-)
>