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SubjectRe: [PATCH v3 1/2] dt-bindings: media: i2c: Add IMX296 CMOS sensor binding
Hi Rob, Sakari,

On Tue, Oct 29, 2019 at 05:12:13PM -0500, Rob Herring wrote:
> On Mon, Oct 28, 2019 at 02:21:15PM +0200, Sakari Ailus wrote:
> > Hi Manivannan,
> >
> > Thanks for the update.
> >
> > On Fri, Oct 25, 2019 at 11:29:07PM +0530, Manivannan Sadhasivam wrote:
> > > Add YAML devicetree binding for IMX296 CMOS image sensor.
> > >
> > > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> > > ---
> > > .../devicetree/bindings/media/i2c/imx296.yaml | 98 +++++++++++++++++++
> > > 1 file changed, 98 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..4e204fd7cf90
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/media/i2c/imx296.yaml
> > > @@ -0,0 +1,98 @@
> > > +# 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@linaro.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.
> > > + default: 37125000
> >
> > I think you could omit the default.
>
> Yes, there's no default if it is required.
>

Okay.

> > > +
> > > + vddo-supply:
> > > + description:
> > > + Definition of the regulator used as interface power supply.
> > > + maxItems: 1
> > > +
> > > + vdda-supply:
> > > + description:
> > > + Definition of the regulator used as analog power supply.
> > > + maxItems: 1
> > > +
> > > + vddd-supply:
> > > + description:
> > > + Definition of the regulator used as digital power supply.
> > > + maxItems: 1
> > > +
> > > + reset-gpios:
> > > + description:
> > > + The phandle and specifier for the GPIO that controls sensor reset.
> > > + maxItems: 1
> > > +
> > > + # See ../video-interfaces.txt for details
>
> details on what?
>

Standard properties like endpoint, reg, etc... I can remove it if not
required.

> > > +
> > > +required:
> > > + - compatible
> > > + - reg
> > > + - clocks
> > > + - clock-names
> > > + - clock-frequency
> > > + - vddo-supply
> > > + - vdda-supply
> > > + - vddd-supply
> >
> > I think the port and endpoint nodes should documented here as well.
>
> port yes, but endpoint no. Unless you have endpoint properties other
> than remote-endpoint or reg.
>


Okay. Will document port.

Thanks,
Mani

> >
> > > +
> > > +additionalProperties: false
> > > +
> > > +examples:
> > > + - |
> > > + #include <dt-bindings/gpio/gpio.h>
> > > +
> > > + imx296: camera-sensor@1a {
> > > + compatible = "sony,imx296";
> > > + reg = <0x1a>;
> > > + reset-gpios = <&msmgpio 35 GPIO_ACTIVE_LOW>;
> > > + pinctrl-names = "default";
> > > + pinctrl-0 = <&camera_rear_default>;
> > > + clocks = <&gcc 90>;
> > > + clock-names = "mclk";
> > > + clock-frequency = <37125000>;
> > > + vddo-supply = <&camera_vddo_1v8>;
> > > + vdda-supply = <&camera_vdda_3v3>;
> > > + vddd-supply = <&camera_vddd_1v2>;
> > > +
> > > + port {
> > > + imx296_ep: endpoint {
> > > + remote-endpoint = <&csiphy0_ep>;
> > > + };
> > > + };
> > > + };
> > > +
> > > +...
> >
> > --
> > Regards,
> >
> > Sakari Ailus

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