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Date: Sun, 17 Jan 2021 23:22:07 +0100
From: AngeloGioacchino Del Regno
<angelogioacchino.delregno@...ainline.org>
To: Sakari Ailus <sakari.ailus@....fi>
Cc: mchehab@...nel.org, robh+dt@...nel.org, shawnguo@...nel.org,
s.hauer@...gutronix.de, linux-media@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
phone-devel@...r.kernel.org, konrad.dybcio@...ainline.org,
marijn.suijten@...ainline.org, martin.botka@...ainline.org
Subject: Re: [PATCH v4 2/2] media: dt-bindings: media: i2c: Add IMX300 CMOS
sensor binding
Il 17/01/21 00:44, Sakari Ailus ha scritto:
> Hi AngeloGioacchino,
>
> On Wed, Jan 13, 2021 at 07:29:34PM +0100, AngeloGioacchino Del Regno wrote:
>> Add YAML device tree binding for IMX300 CMOS image sensor, and
>> the relevant MAINTAINERS entries.
>>
>> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...ainline.org>
>> ---
>> .../bindings/media/i2c/sony,imx300.yaml | 112 ++++++++++++++++++
>> MAINTAINERS | 7 ++
>> 2 files changed, 119 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/media/i2c/sony,imx300.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/media/i2c/sony,imx300.yaml b/Documentation/devicetree/bindings/media/i2c/sony,imx300.yaml
>> new file mode 100644
>> index 000000000000..4fa767feea80
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/media/i2c/sony,imx300.yaml
>> @@ -0,0 +1,112 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/media/i2c/sony,imx300.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Sony 1/2.3-Inch 25Mpixel Stacked CMOS Digital Image Sensor
>> +
>> +maintainers:
>> + - AngeloGioacchino Del Regno <angelogioacchino.delregno@...ainline.org>
>> +
>> +description: |-
>> + The Sony IMX300 is a 1/2.3-inch Stacked CMOS (Exmor-RS) digital image
>> + sensor with a pixel size of 1.08um and an active array size of
>> + 5948H x 4140V. It is programmable through I2C interface at address 0x10.
>> + Image data is sent through MIPI CSI-2, which is configured as either 2 or
>> + 4 data lanes.
>> +
>> +properties:
>> + compatible:
>> + const: sony,imx300
>> +
>> + reg:
>> + maxItems: 1
>> +
>> + clocks:
>> + maxItems: 1
>
> Please add assigned clock related properties; see
> Documentation/driver-api/media/camera-sensor.rst .
>
>> +
>> + vdig-supply:
>> + description:
>> + Digital I/O voltage supply, 1.15-1.20 volts
>> +
>> + vana-supply:
>> + description:
>> + Analog voltage supply, 2.2 volts
>> +
>> + vddl-supply:
>> + description:
>> + Digital core voltage supply, 1.8 volts
>> +
>> + reset-gpios:
>> + description: |-
>> + Reference to the GPIO connected to the xclr pin, if any.
>> + Must be released (set high) after all supplies are applied.
>> +
>> + # See ../video-interfaces.txt for more details
>> + port:
>> + type: object
>> + properties:
>> + endpoint:
>> + type: object
>> +
>> + properties:
>> + data-lanes:
>> + description: |-
>> + The driver only supports four-lane operation.
>
> This can be removed as bindings describe hardware, not driver operation.
>
>> + items:
>> + - const: 0
>> + - const: 1
>> + - const: 2
>> + - const: 3
>
> Two lanes here, too?
>
>> +
>> + clock-noncontinuous: true
>> +
>> + link-frequencies:
>> + $ref: /schemas/types.yaml#/definitions/uint64-array
>> + description:
>> + Allowed data bus frequencies. The driver currently needs
>> + to switch between 780000000 and 480000000 Hz in order to
>> + guarantee functionality of all modes.
>
> You can omit this description, too.
>
>> +
>> + required:
>> + - data-lanes
>> + - link-frequencies
>> +
>> +required:
>> + - compatible
>> + - reg
>> + - clocks
>> + - vana-supply
>> + - vdig-supply
>> + - vddl-supply
>
> Are the regulators really required? I'm not quite sure about the
> established practices; still the common case is that one or two of these
> are hard-wired.
>
>> + - port
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> + - |
>> + i2c0 {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> +
>> + imx300: sensor@10 {
>> + compatible = "sony,imx300";
>> + reg = <0x10>;
>> + clocks = <&imx300_xclk>;
>> + vana-supply = <&imx300_vana>; /* 2.2v */
>> + vdig-supply = <&imx300_vdig>; /* 1.2v */
>> + vddl-supply = <&imx300_vddl>; /* 1.8v */
>> +
>> + port {
>> + imx300_0: endpoint {
>> + remote-endpoint = <&csi1_ep>;
>> + data-lanes = <0 1 2 3>;
>> + clock-noncontinuous;
>> + link-frequencies = /bits/ 64 <780000000 480000000>;
>> + };
>> + };
>> + };
>> + };
>> +
>> +...
>> diff --git a/MAINTAINERS b/MAINTAINERS
>> index ad9abb42f852..5e0f08f48d48 100644
>> --- a/MAINTAINERS
>> +++ b/MAINTAINERS
>> @@ -16633,6 +16633,13 @@ T: git git://linuxtv.org/media_tree.git
>> F: Documentation/devicetree/bindings/media/i2c/imx290.txt
>> F: drivers/media/i2c/imx290.c
>>
>> +SONY IMX300 SENSOR DRIVER
>> +M: AngeloGioacchino Del Regno <angelogioacchino.delregno@...ainline.org>
>> +L: linux-media@...r.kernel.org
>
> Please also add the git tree.
>
> Ideally also the MAINTAINERS change comes with the first patch adding the
> files, which should be the DT bindings. I.e. just reverse the order of the
> patches.
>
>> +S: Maintained
>> +F: Documentation/devicetree/bindings/media/i2c/sony,imx300.yaml
>> +F: drivers/media/i2c/imx300.c
>> +
>> SONY IMX319 SENSOR DRIVER
>> M: Bingbu Cao <bingbu.cao@...el.com>
>> L: linux-media@...r.kernel.org
>
Besides that, I'm sorry I forgot to port the following tag from V3 of
this patch, which didn't change.
I'm adding the forgotten R-b from Rob here:
Reviewed-by: Rob Herring <robh@...nel.org>
Sorry again.
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