[PATCH v2 1/5] dt-bindings: phy: imx8mq-usb: add compatible "fsl,imx95-usb-phy"

[Xu Yang]

On Wed, Aug 07, 2024 at 07:59:02AM +0200, Krzysztof Kozlowski wrote:
> On 07/08/2024 07:57, Xu Yang wrote:
> > On Wed, Aug 07, 2024 at 07:48:43AM +0200, Krzysztof Kozlowski wrote:
> >> On 06/08/2024 18:11, Frank Li wrote:
> >>> On Tue, Aug 06, 2024 at 10:29:47AM +0200, Krzysztof Kozlowski wrote:
> >>>> On 06/08/2024 07:06, Xu Yang wrote:
> >>>>> The usb phy in i.MX95 is compatible with i.MX8MP's, this will add a
> >>>>> compatible "fsl,imx95-usb-phy" for i.MX95. Also change reg maxItems
> >>>>> to 2 since i.MX95 needs another regmap to control Type-C Assist (TCA)
> >>>>> block. Since i.MX95 usb phy is able to switch SS lanes, this will also
> >>>>> add orientation-switch and port property to the file.
> >>>>>
> >>>>> Signed-off-by: Xu Yang <xu.yang_2 at nxp.com>
> >>>>>
> >>>>> ---
> >>>>> Changes in v2:
> >>>>>  - replace minItems with description in reg property
> >>>>>  - remove orientation-switch and port
> >>>>>  - refer to usb-switch.yaml
> >>>>>  - use unevaluatedProperties
> >>>>>
[...]
> >>>>
> >>>> ref should be rather in top-level. You can always disallow certain
> >>>> properties for devices, if they are really not applicable.
> >>>
> >>> There are some "required" in usb-switch.yaml,
> >>>
> >>> oneOf:
> >>>   - required:
> >>>       - port
> >>>   - required:
> >>>       - ports
> >>>
> >>> If put on the top, it may cause DTB check warning for other compatible
> >>> strings, which have not support usb-switch.
> >>
> >> Hm, indeed, that's unusual case to have such different devices in one
> >> schema. Did you test that above $ref in if: actually works?
> > 
> > Yes, it works and this yaml pass dt_binding_check and dtbs_check. 
> 
> I know it passes, I am asking whether it actually works. Is the $ref
> actually effective? Is it properly applied?

If imx95 usb phy node doesn't contain "orientation-switch" and "port", dtb check will
show below error:

usb/arch/arm64/boot/dts/freescale/imx95-19x19-evk.dtb: phy at 4c1f0040: 'oneOf' conditional failed, one must be fixed:
        'port' is a required property
        'ports' is a required property
        from schema $id: http://devicetree.org/schemas/phy/fsl,imx8mq-usb-phy.yaml#

Do you want other test results?

Thanks,
Xu Yang

> 
> Best regards,
> Krzysztof
>