Re: [PATCH 06/10] dt-bindings: ufs: Add compatibles for S32N79 Host Controller platform driver

On Wed, Aug 26, 2026 at 09:35:01AM -0500, Frank Li wrote:
> On Wed, Aug 26, 2026 at 03:40:44PM +0200, Larisa Grigore wrote:
> > [You don't often get email from [email protected]. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ]
> >
> > Document the device tree binding for the NXP S32N79 DWC-based UFS host
> > controller which is compliant with JESD-223D "Universal Flash Storage Host
> > Controller Interface" v3.0.
> >
> > The controller requires access to the SCM register block and the core
> > clock rate when M-PHY initialization is performed. Add the optional
> > nxp,mphy-boot-mode property to select the M-PHY firmware execution
> > environment.
> > Currently, the M-PHY firmware can only run from ROM. If the property is
> > omitted, M-PHY initialization is assumed to be handled externally.
> >
> > Signed-off-by: Larisa Grigore <[email protected]>
> > ---
> >  .../bindings/ufs/nxp,s32n7-ufshc.yaml         | 99 +++++++++++++++++++
> >  1 file changed, 99 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/ufs/nxp,s32n7-ufshc.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/ufs/nxp,s32n7-ufshc.yaml b/Documentation/devicetree/bindings/ufs/nxp,s32n7-ufshc.yaml
> > new file mode 100644
> > index 000000000000..d9d5669be313
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/ufs/nxp,s32n7-ufshc.yaml
> > @@ -0,0 +1,99 @@
> > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/ufs/nxp,s32n7-ufshc.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: NXP S32N79 Universal Flash Storage (UFS) Controller
> > +
> > +maintainers:
> > +  - Larisa Grigore <[email protected]>
> > +
> > +# Select only our matches, not all jedec,ufs
> > +select:
> > +  properties:
> > +    compatible:
> > +      contains:
> > +        const: nxp,s32n79-ufshc
> > +  required:
> > +    - compatible
> > +
> > +properties:
> > +  compatible:
> > +    items:
> > +      - const: nxp,s32n79-ufshc
> > +      - const: jedec,ufs-3.0
> 
> Any place actually use this fallback?

I don't think that this exists anywhere already:
https://lore.kernel.org/all/?q=%22jedec%2Cufs-3.0%22
$ git checkout korg-next/master 
Previous HEAD position was 2697ef8943c9 Add linux-next specific files for 20260813
HEAD is now at f82a5da2f049 Add linux-next specific files for 20260826
$ rg jedec,ufs-3.0
$ 

So not entirely sure what the point of this actually is, if the driver
doesn't use the fallback.

pw-bot: changes-requested

Thanks,
Conor.

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