linux-kernel - Re: [PATCH 04/10] dt-bindings: treewide: add feature-domains description in binding files

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Message-ID: <20230706145108.GA3858320-robh@kernel.org>
Date:   Thu, 6 Jul 2023 08:51:08 -0600
From:   Rob Herring <robh@...nel.org>
To:     Gatien Chevallier <gatien.chevallier@...s.st.com>
Cc:     Oleksii_Moisieiev@...m.com, gregkh@...uxfoundation.org,
        herbert@...dor.apana.org.au, davem@...emloft.net,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        alexandre.torgue@...s.st.com, vkoul@...nel.org, jic23@...nel.org,
        olivier.moysan@...s.st.com, arnaud.pouliquen@...s.st.com,
        mchehab@...nel.org, fabrice.gasnier@...s.st.com,
        andi.shyti@...nel.org, ulf.hansson@...aro.org, edumazet@...gle.com,
        kuba@...nel.org, pabeni@...hat.com, hugues.fruchet@...s.st.com,
        lee@...nel.org, will@...nel.org, catalin.marinas@....com,
        arnd@...nel.org, richardcochran@...il.com,
        linux-crypto@...r.kernel.org, devicetree@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        dmaengine@...r.kernel.org, linux-i2c@...r.kernel.org,
        linux-iio@...r.kernel.org, alsa-devel@...a-project.org,
        linux-media@...r.kernel.org, linux-mmc@...r.kernel.org,
        netdev@...r.kernel.org, linux-phy@...ts.infradead.org,
        linux-serial@...r.kernel.org, linux-spi@...r.kernel.org,
        linux-usb@...r.kernel.org
Subject: Re: [PATCH 04/10] dt-bindings: treewide: add feature-domains
 description in binding files

On Wed, Jul 05, 2023 at 07:27:53PM +0200, Gatien Chevallier wrote:
> feature-domains is an optional property that allows a peripheral to
> refer to one or more feature domain controller(s).
> 
> Description of this property is added to all peripheral binding files of
> the peripheral under the STM32 firewall controllers. It allows an accurate
> representation of the hardware, where various peripherals are connected
> to this firewall bus. The firewall can then check the peripheral accesses
> before allowing it to probe.
> 
> Signed-off-by: Gatien Chevallier <gatien.chevallier@...s.st.com>
> ---
> 
> Disclaimer: Some error with dtbs_check will be observed as I've
> considered the property to be generic, as Rob asked
> 
>  Documentation/devicetree/bindings/crypto/st,stm32-hash.yaml  | 4 ++++
>  Documentation/devicetree/bindings/dma/st,stm32-dma.yaml      | 4 ++++
>  Documentation/devicetree/bindings/dma/st,stm32-dmamux.yaml   | 4 ++++
>  Documentation/devicetree/bindings/i2c/st,stm32-i2c.yaml      | 4 ++++
>  Documentation/devicetree/bindings/iio/adc/st,stm32-adc.yaml  | 4 ++++
>  .../devicetree/bindings/iio/adc/st,stm32-dfsdm-adc.yaml      | 4 ++++
>  Documentation/devicetree/bindings/iio/dac/st,stm32-dac.yaml  | 4 ++++
>  .../devicetree/bindings/media/cec/st,stm32-cec.yaml          | 4 ++++
>  Documentation/devicetree/bindings/media/st,stm32-dcmi.yaml   | 4 ++++
>  .../bindings/memory-controllers/st,stm32-fmc2-ebi.yaml       | 4 ++++
>  Documentation/devicetree/bindings/mfd/st,stm32-lptimer.yaml  | 4 ++++
>  Documentation/devicetree/bindings/mfd/st,stm32-timers.yaml   | 5 +++++
>  Documentation/devicetree/bindings/mmc/arm,pl18x.yaml         | 4 ++++
>  Documentation/devicetree/bindings/net/stm32-dwmac.yaml       | 4 ++++
>  Documentation/devicetree/bindings/phy/phy-stm32-usbphyc.yaml | 4 ++++
>  .../devicetree/bindings/regulator/st,stm32-vrefbuf.yaml      | 4 ++++
>  Documentation/devicetree/bindings/rng/st,stm32-rng.yaml      | 4 ++++
>  Documentation/devicetree/bindings/serial/st,stm32-uart.yaml  | 4 ++++
>  Documentation/devicetree/bindings/sound/st,stm32-i2s.yaml    | 4 ++++
>  Documentation/devicetree/bindings/sound/st,stm32-sai.yaml    | 4 ++++
>  .../devicetree/bindings/sound/st,stm32-spdifrx.yaml          | 4 ++++
>  Documentation/devicetree/bindings/spi/st,stm32-qspi.yaml     | 4 ++++
>  Documentation/devicetree/bindings/spi/st,stm32-spi.yaml      | 4 ++++
>  Documentation/devicetree/bindings/usb/dwc2.yaml              | 4 ++++
>  24 files changed, 97 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/crypto/st,stm32-hash.yaml b/Documentation/devicetree/bindings/crypto/st,stm32-hash.yaml
> index b767ec72a999..daf8dcaef627 100644
> --- a/Documentation/devicetree/bindings/crypto/st,stm32-hash.yaml
> +++ b/Documentation/devicetree/bindings/crypto/st,stm32-hash.yaml
> @@ -50,6 +50,10 @@ properties:
>    power-domains:
>      maxItems: 1
>  
> +  feature-domains:
> +    minItems: 1
> +    maxItems: 3

What are the 3 entries?

Rob