Re: [PATCH v7 1/5] media: dt-bindings: nxp,imx8mq-mipi-csi2: Add i.MX8ULP compatible string

Frank Li
2025-11-11T20:48:02Z

On Mon, Oct 27, 2025 at 02:05:37AM +0200, Laurent Pinchart wrote:
> Hi Guoniu,
>
> On Thu, Oct 23, 2025 at 05:19:42PM +0800, Guoniu Zhou wrote:
> > From: Guoniu Zhou <guoniu.zhou@nxp.com>
> >
> > The CSI-2 receiver in the i.MX8ULP is almost identical to the version
> > present in the i.MX8QXP/QM, but i.MX8ULP CSI-2 controller needs pclk
> > clock as the input clock for its APB interface of Control and Status
> > register(CSR). So add compatible string fsl,imx8ulp-mipi-csi2 and
> > increase maxItems of Clocks (clock-names) to 4 from 3. And keep the
> > same restriction for existing compatible.
> >
> > Reviewed-by: Frank Li <Frank.Li@nxp.com>
> > Acked-by: Conor Dooley <conor.dooley@microchip.com>
> > Signed-off-by: Guoniu Zhou <guoniu.zhou@nxp.com>
> > ---
> > .../bindings/media/nxp,imx8mq-mipi-csi2.yaml | 41 ++++++++++++++++++++--
> > 1 file changed, 39 insertions(+), 2 deletions(-)
> >
> > diff --git a/Documentation/devicetree/bindings/media/nxp,imx8mq-mipi-csi2.yaml b/Documentation/devicetree/bindings/media/nxp,imx8mq-mipi-csi2.yaml
> > index 3389bab266a9adbda313c8ad795b998641df12f3..da3978da1cab75292ada3f24837443f7f4ab6418 100644
> > --- a/Documentation/devicetree/bindings/media/nxp,imx8mq-mipi-csi2.yaml
> > +++ b/Documentation/devicetree/bindings/media/nxp,imx8mq-mipi-csi2.yaml
> > @@ -20,6 +20,7 @@ properties:
> > - enum:
> > - fsl,imx8mq-mipi-csi2
> > - fsl,imx8qxp-mipi-csi2
> > + - fsl,imx8ulp-mipi-csi2
> > - items:
> > - const: fsl,imx8qm-mipi-csi2
> > - const: fsl,imx8qxp-mipi-csi2
> > @@ -39,12 +40,16 @@ properties:
> > clock that the RX DPHY receives.
> > - description: ui is the pixel clock (phy_ref up to 333Mhz).
> > See the reference manual for details.
> > + - description: pclk is clock for csr APB interface.
> > + minItems: 3
> >
> > clock-names:
> > items:
> > - const: core
> > - const: esc
> > - const: ui
> > + - const: pclk
> > + minItems: 3
> >
> > power-domains:
> > maxItems: 1
> > @@ -130,19 +135,51 @@ allOf:
> > compatible:
> > contains:
> > enum:
> > - - fsl,imx8qxp-mipi-csi2
> > + - fsl,imx8ulp-mipi-csi2
> > + then:
> > + properties:
> > + reg:
> > + minItems: 2
> > + resets:
> > + minItems: 2
> > + maxItems: 2
> > + clocks:
> > + minItems: 4
> > + clock-names:
> > + minItems: 4
>
> Do we need the clock-names constraint ? The DT schemas will enforce that
> clocks and clock-names always have the same number of elements.
>

clock-names list already restrict at top section

clock-names:
items:
- const: core
- const: esc
- const: ui
- const: pclk
minItems: 3

Here just restrict need 4 clocks, instead 3 clock for fsl,imx8ulp-mipi-csi2

Frank
> > +
> > + - if:
> > + properties:
> > + compatible:
> > + contains:
> > + const: fsl,imx8qxp-mipi-csi2
> > then:
> > properties:
> > reg:
> > minItems: 2
> > resets:
> > maxItems: 1
> > - else:
> > + clocks:
> > + maxItems: 3
> > + clock-names:
> > + maxItems: 3
> > +
> > + - if:
> > + properties:
> > + compatible:
> > + contains:
> > + enum:
> > + - fsl,imx8mq-mipi-csi2
> > + then:
> > properties:
> > reg:
> > maxItems: 1
> > resets:
> > minItems: 3
> > + clocks:
> > + maxItems: 3
> > + clock-names:
> > + maxItems: 3
> > required:
> > - fsl,mipi-phy-gpr
> >
>
> Could you please sort those conditional blocks by alphabetical order of
> the compatible strings ?
>
> --
> Regards,
>
> Laurent Pinchart