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Date: Thu, 26 Nov 2020 18:15:22 +0100
From: AngeloGioacchino Del Regno <kholk11@...il.com>
To: Rob Herring <robh@...nel.org>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>, marijns95@...il.com,
Konrad Dybcio <konradybcio@...il.com>, martin.botka1@...il.com,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@...r.kernel.org>,
linux-media <linux-media@...r.kernel.org>,
phone-devel@...r.kernel.org,
linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/2] media: dt-bindings: media: i2c: Add IMX300 CMOS
sensor binding
Il giorno mer 4 nov 2020 alle ore 22:48 Rob Herring <robh@...nel.org>
ha scritto:
>
> On Thu, Oct 29, 2020 at 06:29:47PM +0100, kholk11@...il.com wrote:
> > From: AngeloGioacchino Del Regno <kholk11@...il.com>
> >
> > Add YAML device tree binding for IMX300 CMOS image sensor, and
> > the relevant MAINTAINERS entries.
> >
> > Signed-off-by: AngeloGioacchino Del Regno <kholk11@...il.com>
> > ---
> > .../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..8f1d795f8072
> > --- /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 8Mpixel Stacked CMOS Digital Image Sensor
> > +
> > +maintainers:
> > + - AngeloGioacchino Del Regno <kholk11@...il.com>
> > +
> > +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
> > +
> > + 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:
>
> maxItems: 1
Agreed.
>
> > + 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 sensor supports either two-lane, or four-lane operation,
> > + but the driver currently supports only four-lane.
>
> What the driver is not relevant. Please define all possible
> configurations. Or just omit? What's the behavior if omitted?
>
I wrote this as to document the hardware (there is no datasheet around and
I fear that findings will be forgotten one day)... but if you say it's
not relevant...
...well, then I can as well just write it in my local notes and remove the info
from here.
> > + items:
> > + - const: 0
> > + - const: 1
> > + - const: 2
> > + - const: 3
> > +
> > + 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.
> > +
> > + required:
> > + - link-frequencies
> > +
> > +required:
> > + - compatible
> > + - reg
> > + - clocks
> > + - vana-supply
> > + - vdig-supply
> > + - vddl-supply
> > + - 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 c66710dd7e0a..21ba41db0063 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -16279,6 +16279,13 @@ 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 <kholk11@...il.com>
> > +L: linux-media@...r.kernel.org
> > +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
> > --
> > 2.28.0
> >
Also, I'm sorry for the *very* late reply. I've been busy quite a lot
in these days!
By the way, I'll push a v3 for this one ASAP!
Yours,
Angelo
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