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

[Gatien CHEVALLIER <gatien.chevallier@xxxxxxxxxxx>]

Hello Rob,

On 7/6/23 16:51, Rob Herring wrote:
> 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@xxxxxxxxxxx>
> > ---
> >
> > 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

I thought I was benefiting from the description of the pattern-property 
in the RIFSC YAML file. But yes anyway, it seems like it needs some 
description here as the dependency does not appear in this file.

I picked 3 as a maxItems for our ST needs, I'll give it some more 
thought when coming back with something clearer.

I will change that in V2, thank you for pointing that out.

Best regards,
Gatien