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Message-ID: <20230710-underling-angelfish-c47d363a59f5@spud>
Date: Mon, 10 Jul 2023 18:56:56 +0100
From: Conor Dooley <conor@...nel.org>
To: Rob Herring <robh@...nel.org>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>,
Todor Tomov <todor.too@...il.com>, linux-media@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] media: dt-bindings: Convert Omnivision OV7251 to DT
schema
On Fri, Jul 07, 2023 at 03:06:46PM -0600, Rob Herring wrote:
> Convert the OmniVision OV7251 Image Sensor binding to DT schema format.
>
> vddd-supply was listed as required, but the example and actual user
> don't have it. Also, the data brief says it has an internal regulator,
> so perhaps it is truly optional.
ov7251.c:
ov7251->core_regulator = devm_regulator_get(dev, "vddd");
if (IS_ERR(ov7251->core_regulator)) {
dev_err(dev, "cannot get core regulator\n");
return PTR_ERR(ov7251->core_regulator);
}
Looks like the driver's probe function disagrees?
I was going to ask how it worked, but the one user has
status = "disabled"...
/shrug, what's here looks fine to me, whatever Qualcomm person cares
about the driver can make sure it works for them I guess.
Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
Cheers,
Conor.
>
> Signed-off-by: Rob Herring <robh@...nel.org>
> ---
> .../devicetree/bindings/media/i2c/ov7251.txt | 52 ---------
> .../bindings/media/i2c/ovti,ov7251.yaml | 105 ++++++++++++++++++
> 2 files changed, 105 insertions(+), 52 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/media/i2c/ov7251.txt
> create mode 100644 Documentation/devicetree/bindings/media/i2c/ovti,ov7251.yaml
>
> diff --git a/Documentation/devicetree/bindings/media/i2c/ov7251.txt b/Documentation/devicetree/bindings/media/i2c/ov7251.txt
> deleted file mode 100644
> index 8281151f7493..000000000000
> --- a/Documentation/devicetree/bindings/media/i2c/ov7251.txt
> +++ /dev/null
> @@ -1,52 +0,0 @@
> -* Omnivision 1/7.5-Inch B&W VGA CMOS Digital Image Sensor
> -
> -The Omnivision OV7251 is a 1/7.5-Inch CMOS active pixel digital image sensor
> -with an active array size of 640H x 480V. It is programmable through a serial
> -I2C interface.
> -
> -Required Properties:
> -- compatible: Value should be "ovti,ov7251".
> -- clocks: Reference to the xclk clock.
> -- clock-names: Should be "xclk".
> -- clock-frequency: Frequency of the xclk clock.
> -- enable-gpios: Chip enable GPIO. Polarity is GPIO_ACTIVE_HIGH. This corresponds
> - to the hardware pin XSHUTDOWN which is physically active low.
> -- vdddo-supply: Chip digital IO regulator.
> -- vdda-supply: Chip analog regulator.
> -- vddd-supply: Chip digital core regulator.
> -
> -The device node shall contain one 'port' child node with a single 'endpoint'
> -subnode for its digital output video port, in accordance with the video
> -interface bindings defined in
> -Documentation/devicetree/bindings/media/video-interfaces.txt.
> -
> -Example:
> -
> - &i2c1 {
> - ...
> -
> - ov7251: camera-sensor@60 {
> - compatible = "ovti,ov7251";
> - reg = <0x60>;
> -
> - enable-gpios = <&gpio1 6 GPIO_ACTIVE_HIGH>;
> - pinctrl-names = "default";
> - pinctrl-0 = <&camera_bw_default>;
> -
> - clocks = <&clks 200>;
> - clock-names = "xclk";
> - clock-frequency = <24000000>;
> -
> - vdddo-supply = <&camera_dovdd_1v8>;
> - vdda-supply = <&camera_avdd_2v8>;
> - vddd-supply = <&camera_dvdd_1v2>;
> -
> - port {
> - ov7251_ep: endpoint {
> - clock-lanes = <1>;
> - data-lanes = <0>;
> - remote-endpoint = <&csi0_ep>;
> - };
> - };
> - };
> - };
> diff --git a/Documentation/devicetree/bindings/media/i2c/ovti,ov7251.yaml b/Documentation/devicetree/bindings/media/i2c/ovti,ov7251.yaml
> new file mode 100644
> index 000000000000..8d939858d950
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/i2c/ovti,ov7251.yaml
> @@ -0,0 +1,105 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/i2c/ovti,ov7251.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: OmniVision OV7251 Image Sensor
> +
> +description:
> + The Omnivision OV7251 is a 1/7.5-Inch CMOS active pixel digital image sensor
> + with an active array size of 640H x 480V. It is programmable through a serial
> + I2C interface.
> +
> +maintainers:
> + - Todor Tomov <todor.too@...il.com>
> +
> +properties:
> + compatible:
> + const: ovti,ov7251
> +
> + reg:
> + maxItems: 1
> +
> + clocks:
> + description: XCLK Input Clock
> +
> + clock-names:
> + const: xclk
> +
> + clock-frequency:
> + description: Frequency of the xclk clock in Hz.
> +
> + vdda-supply:
> + description: Analog voltage supply, 2.8 volts
> +
> + vddd-supply:
> + description: Digital core voltage supply, 1.2 volts
> +
> + vdddo-supply:
> + description: Digital I/O voltage supply, 1.8 volts
> +
> + enable-gpios:
> + maxItems: 1
> + description:
> + Reference to the GPIO connected to the XSHUTDOWN pin, if any. Polarity
> + is GPIO_ACTIVE_HIGH.
> +
> + port:
> + description: Digital Output Port
> + $ref: /schemas/graph.yaml#/$defs/port-base
> + additionalProperties: false
> +
> + properties:
> + endpoint:
> + $ref: /schemas/media/video-interfaces.yaml#
> + unevaluatedProperties: false
> +
> + properties:
> + clock-lanes:
> + maximum: 1
> +
> + data-lanes:
> + maxItems: 1
> +
> + required:
> + - data-lanes
> +
> +required:
> + - compatible
> + - reg
> + - clocks
> + - vdddo-supply
> + - vdda-supply
> + - port
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/gpio/gpio.h>
> +
> + i2c {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + camera@3c {
> + compatible = "ovti,ov7251";
> + reg = <0x3c>;
> + clocks = <&clks 1>;
> + clock-frequency = <24000000>;
> + vdddo-supply = <&ov7251_vdddo_1v8>;
> + vdda-supply = <&ov7251_vdda_2v8>;
> + vddd-supply = <&ov7251_vddd_1v5>;
> + enable-gpios = <&gpio1 19 GPIO_ACTIVE_HIGH>;
> +
> + port {
> + ov7251_ep: endpoint {
> + remote-endpoint = <&csi0_ep>;
> + clock-lanes = <1>;
> + data-lanes = <0>;
> + };
> + };
> + };
> + };
> +...
> --
> 2.40.1
>
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