linux-kernel - RE: [EXT] Re: [PATCH v7 05/11] dt-bindings: usb: ci-hdrc-usb2-imx: add restrictions for reg, interrupts, clock and clock-names properties

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Date: Fri, 8 Mar 2024 08:46:33 +0000
From: Xu Yang <xu.yang_2@....com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	"krzysztof.kozlowski+dt@...aro.org" <krzysztof.kozlowski+dt@...aro.org>,
	"shawnguo@...nel.org" <shawnguo@...nel.org>, "conor+dt@...nel.org"
	<conor+dt@...nel.org>
CC: "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>, "kernel@...gutronix.de"
	<kernel@...gutronix.de>, "festevam@...il.com" <festevam@...il.com>,
	dl-linux-imx <linux-imx@....com>, "peter.chen@...nel.org"
	<peter.chen@...nel.org>, Jun Li <jun.li@....com>, "linux-usb@...r.kernel.org"
	<linux-usb@...r.kernel.org>, "devicetree@...r.kernel.org"
	<devicetree@...r.kernel.org>, "linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>
Subject: RE: [EXT] Re: [PATCH v7 05/11] dt-bindings: usb: ci-hdrc-usb2-imx:
 add restrictions for reg, interrupts, clock and clock-names properties


> 
> 
> On 28/02/2024 12:29, Xu Yang wrote:
> > Add restrictions for reg, interrupts, clock and clock-names properties
> > for imx Socs.
> >
> > Signed-off-by: Xu Yang <xu.yang_2@....com>
> >
> > ---
> > Changes in v4:
> >  - new patch since v3's discussion
> >  - split the reg, interrupts, clock and clock-names properties into
> >    common part and device-specific
> > Changes in v5:
> >  - keep common property unchanged
> >  - make if-then more readable
> >  - remove non imx part
> > Changes in v6:
> >  - new patch based on ci-hdrc-usb2-imx.yaml
> > Changes in v7:
> >  - no changes
> > ---
> >  .../bindings/usb/ci-hdrc-usb2-imx.yaml        | 52 +++++++++++++++++++
> >  1 file changed, 52 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2-imx.yaml
> b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2-imx.yaml
> > index 50494ce06d07..a4730a2393e6 100644
> > --- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2-imx.yaml
> > +++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2-imx.yaml
> > @@ -49,6 +49,12 @@ properties:
> >            - const: fsl,imx6ul-usb
> >            - const: fsl,imx27-usb
> >
> > +  reg:
> > +    maxItems: 1
> > +
> > +  interrupts:
> > +    maxItems: 1
> 
> This kind of proves that your previous patch does not make sense. Why
> common IMX schema allows two items, but IMX allows only one? So the
> common is not only for IMX, right?

Yes, the common yaml is not only for IMX. In next version, the old ci-hdrc-usb2.yaml
will also refer to chipidea,usb2-common.yaml. So chipidea,usb2-imx.yaml needs to
constrain these properties.

Thanks,
Xu Yang 

> 
> Best regards,
> Krzysztof