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Date:   Tue, 30 May 2023 09:59:59 +0200
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Subject: Re: [PATCH 7/8] ARM: dts: stm32: adopt generic iio bindings for adc
 channels on dhcor-drc
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To:     Olivier MOYSAN <olivier.moysan@foss.st.com>,
        Marek Vasut <marex@denx.de>, Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley <conor+dt@kernel.org>,
        Maxime Coquelin <mcoquelin.stm32@gmail.com>
CC:     <kernel@dh-electronics.com>, <devicetree@vger.kernel.org>,
        <linux-stm32@st-md-mailman.stormreply.com>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>
References: <20230524133918.1439516-1-olivier.moysan@foss.st.com>
 <20230524133918.1439516-8-olivier.moysan@foss.st.com>
 <cc7a0a1a-31bb-92f4-6365-5e0c4a4bc85c@denx.de>
 <5bb496d0-6dc1-6ba3-6126-6429037ecf5a@foss.st.com>
From:   Alexandre TORGUE <alexandre.torgue@foss.st.com>
In-Reply-To: <5bb496d0-6dc1-6ba3-6126-6429037ecf5a@foss.st.com>
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Marek, Olivier

On 5/24/23 17:39, Olivier MOYSAN wrote:
> Hi Marek,
> 
> On 5/24/23 15:54, Marek Vasut wrote:
>> On 5/24/23 15:39, Olivier Moysan wrote:
>>> Use STM32 ADC generic bindings instead of legacy bindings on
>>> DHCOR DRC Compact board.
>>>
>>> The STM32 ADC specific binding to declare channels has been deprecated,
>>> hence adopt the generic IIO channels bindings, instead.
>>> The STM32MP151 device tree now exposes internal channels using the
>>> generic binding. This makes the change mandatory here to avoid a mixed
>>> use of legacy and generic binding, which is not supported by the driver.
>>>
>>> Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com>
>>> ---
>>>   .../dts/stm32mp15xx-dhcor-drc-compact.dtsi    | 28 ++++++++++++++++---
>>>   1 file changed, 24 insertions(+), 4 deletions(-)
>>>
>>> diff --git a/arch/arm/boot/dts/stm32mp15xx-dhcor-drc-compact.dtsi 
>>> b/arch/arm/boot/dts/stm32mp15xx-dhcor-drc-compact.dtsi
>>> index 39af79dc654c..92d906bfd5d7 100644
>>> --- a/arch/arm/boot/dts/stm32mp15xx-dhcor-drc-compact.dtsi
>>> +++ b/arch/arm/boot/dts/stm32mp15xx-dhcor-drc-compact.dtsi
>>> @@ -57,15 +57,35 @@ &adc {    /* X11 ADC inputs */
>>>       status = "okay";
>>>       adc1: adc@0 {
>>
>>
>> I sent similar patch recently too:
>>
>> [PATCH] ARM: dts: stm32: Update to generic ADC channel binding on 
>> DHSOM systems
>>
>> But I needed to add #address-cells/#size-cells here and to adc@100, 
>> otherwise DTB checker was complaining . Did you run DTB check and was 
>> it OK on your side ?
> 
> The first patch in this serie adds the #address-cells/#size-cells to the 
>   SoC DT. So, there is no need to add them later in the board DT.
> 
> I can send a v2 with your patch (after removing the cells properties 
> from the patch). Having all the patches in the same serie, will help 
> avoiding sequencing problems.
> 
> Do you agree with this ?

What is the status of this patch ?

Marek, I would prefer to take all ADC updates in this series if you agree.

Alex

> 
> BRs
> Olivier
> 
>>
>>> -        st,adc-channels = <0 1 6>;
>>> -        st,min-sample-time-nsecs = <5000>;
>>>           status = "okay";
>>> +        channel@0 {
>>> +            reg = <0>;
>>> +            st,min-sample-time-ns = <5000>;
>>> +        };
>>> +        channel@1 {
>>> +            reg = <1>;
>>> +            st,min-sample-time-ns = <5000>;
>>> +        };
>>> +        channel@6 {
>>> +            reg = <6>;
>>> +            st,min-sample-time-ns = <5000>;
>>> +        };
>>>       };
>>
>> [...]