Re: (EXT) Re: [PATCH v4 12/12] dt-bindings: serial: fsl-lpuart: Add i.MX8DXL compatible

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Am Donnerstag, dem 18.11.2021 um 19:04 -0600 schrieb Rob Herring:
> On Wed, Nov 10, 2021 at 07:46:55PM +0200, Abel Vesa wrote:
> > Add i.MX8DXL lpuart compatible to the bindings documentation.
> > 
> > Signed-off-by: Abel Vesa <
> > abel.vesa@xxxxxxx
> > >
> > ---
> >  Documentation/devicetree/bindings/serial/fsl-lpuart.yaml | 4 ++++
> >  1 file changed, 4 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/serial/fsl-
> > lpuart.yaml b/Documentation/devicetree/bindings/serial/fsl-
> > lpuart.yaml
> > index dc1f0e07cbd4..fa8a602ccb22 100644
> > --- a/Documentation/devicetree/bindings/serial/fsl-lpuart.yaml
> > +++ b/Documentation/devicetree/bindings/serial/fsl-lpuart.yaml
> > @@ -27,6 +27,10 @@ properties:
> >        - items:
> >            - const: fsl,imx8qm-lpuart
> >            - const: fsl,imx8qxp-lpuart
> > +      - items:
> > +          - const: fsl,imx8dxl-lpuart
> > +          - const: fsl,imx8qxp-lpuart
> > +          - const: fsl,imx7ulp-lpuart
> 
> I'm confused why 8dxl is compatible with 7ulp, but 8qm is not? From
> the 
> driver, it looks like the difference is clocks.

There is a difference between 8qm and 7ulp regarding the clocks. Are
they still considered compatible? Depending on the answer [1] might not
be the correct solution for earlycon regression on 8qm.

Best regards,
Alexander

[1] 
http://lists.infradead.org/pipermail/linux-arm-kernel/2021-November/696770.html





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