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

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Date:   Wed, 30 Oct 2019 17:31:05 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     Sakari Ailus <sakari.ailus@....fi>
Cc:     mchehab@...nel.org, robh+dt@...nel.org,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        c.barrett@...mos.com, a.brela@...mos.com, peter.griffin@...aro.org
Subject: Re: [PATCH v4 1/2] dt-bindings: media: i2c: Add IMX296 CMOS sensor
 binding

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@...aro.org>
> > ---
> >  .../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@...aro.org>
> > +
> > +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.

Thanks,
Mani

> -- 
> Regards,
> 
> Sakari Ailus