Re: [PATCH v4 1/2] dt-bindings: media: i2c: Add IMX296 CMOS sensor binding

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On Wed, Oct 30, 2019 at 05:31:05PM +0530, Manivannan Sadhasivam wrote:
> Hi Sakari,
> 
> On Wed, Oct 30, 2019 at 01:53:28PM +0200, Sakari Ailus wrote:
> > Hi Nabuvannan,
> > 
> > On Wed, Oct 30, 2019 at 03:19:01PM +0530, Manivannan Sadhasivam wrote:
> > > Add YAML devicetree binding for IMX296 CMOS image sensor. Let's also
> > > add MAINTAINERS entry for the binding and driver.
> > > 
> > > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
> > > ---
> > >  .../devicetree/bindings/media/i2c/imx296.yaml | 94 +++++++++++++++++++
> > >  MAINTAINERS                                   |  8 ++
> > >  2 files changed, 102 insertions(+)
> > >  create mode 100644 Documentation/devicetree/bindings/media/i2c/imx296.yaml
> > > 
> > > diff --git a/Documentation/devicetree/bindings/media/i2c/imx296.yaml b/Documentation/devicetree/bindings/media/i2c/imx296.yaml
> > > new file mode 100644
> > > index 000000000000..c04ec2203268
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/media/i2c/imx296.yaml
> > > @@ -0,0 +1,94 @@
> > > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> > > +%YAML 1.2
> > > +---
> > > +$id: http://devicetree.org/schemas/media/i2c/imx296.yaml#
> > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > +
> > > +title: Sony IMX296 1/2.8-Inch CMOS Image Sensor
> > > +
> > > +maintainers:
> > > +  - Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
> > > +
> > > +description: |-
> > > +  The Sony IMX296 is a 1/2.9-Inch active pixel type CMOS Solid-state image
> > > +  sensor with square pixel array and 1.58 M effective pixels. This chip
> > > +  features a global shutter with variable charge-integration time. It is
> > > +  programmable through I2C and 4-wire interfaces. The sensor output is
> > > +  available via CSI-2 serial data output (1 Lane).
> > > +
> > > +properties:
> > > +  compatible:
> > > +    const: sony,imx296
> > > +
> > > +  reg:
> > > +    maxItems: 1
> > > +
> > > +  clocks:
> > > +    maxItems: 1
> > > +
> > > +  clock-names:
> > > +    description:
> > > +      Input clock for the sensor.
> > > +    items:
> > > +      - const: mclk
> > > +
> > > +  clock-frequency:
> > > +    description:
> > > +      Frequency of the mclk clock in Hertz.
> > > +
> > > +  vddo-supply:
> > > +    description:
> > > +      Definition of the regulator used as interface power supply.
> > > +
> > > +  vdda-supply:
> > > +    description:
> > > +      Definition of the regulator used as analog power supply.
> > > +
> > > +  vddd-supply:
> > > +    description:
> > > +      Definition of the regulator used as digital power supply.
> > > +
> > > +  reset-gpios:
> > > +    description:
> > > +      The phandle and specifier for the GPIO that controls sensor reset.
> > > +    maxItems: 1
> > > +
> > > +  port: true
> > 
> > You're missing "type: object" under port.
> > 
> 
> I did that intentionally, since there are other places where I can see the
> "type" field not specified. So, I was not sure about that. Most of the
> display bindings don't specify "type" and they are most available ones.
> I don't think the "port" property differs between cameras and displays.
> So I went with that.

The difference is the panel bindings have a common schema included 
which defines 'port' at least as a node. I don't think an include would 
help too much here, so probably best to add 'type: object' for now. 
Either way, this may change once video-interfaces.txt is converted if 
any of those properties apply here.

Either way:

Reviewed-by: Rob Herring <robh@xxxxxxxxxx>

Rob



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