[PATCH v7 2/3] media: dt-bindings: media: i2c: Add bindings for TW9900

Mehdi Djait
2023-10-16T13:58:47Z

The Techwell TW9900 is a video decoder supporting multiple input
standards, such as PAL and NTSC, and outputs a BT.656 video
signal.

It's designed to be low-power, posesses some features such as a
programmable comb-filter, and automatic input standard detection

Signed-off-by: Mehdi Djait <mehdi.djait@bootlin.com>
---
V6->V7:
- added powerdown-gpios and input ports
- used 4 spaces for example identation

V5->V6:
- This commit had a "Reviewed-by: Rob Herring <robh@kernel.org>" Tag but
decided not to collect it because the last Iteration was more than 2
years ago
- removed SECAM from the mentioned standards
- changed maintainer

V4->V5:
- renamed the file to match the compatible string, and referenced
the graph.yaml schema

V3->V4:
- add the missing reset-gpios node to the binding

V2->V3:
- fix the example not compiling due to a typo in the reset-gpios
node.

.../bindings/media/i2c/techwell,tw9900.yaml | 82 +++++++++++++++++++
1 file changed, 82 insertions(+)
create mode 100644 Documentation/devicetree/bindings/media/i2c/techwell,tw9900.yaml

diff --git a/Documentation/devicetree/bindings/media/i2c/techwell,tw9900.yaml b/Documentation/devicetree/bindings/media/i2c/techwell,tw9900.yaml
new file mode 100644
index 000000000000..244289a9a3e0
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/techwell,tw9900.yaml
@@ -0,0 +1,82 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/i2c/techwell,tw9900.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Techwell TW9900 NTSC/PAL video decoder
+
+maintainers:
+ - Mehdi Djait <mehdi.djait@bootlin.com>
+
+description:
+ The tw9900 is a multi-standard video decoder, supporting NTSC, PAL standards
+ with auto-detection features.
+
+properties:
+ compatible:
+ const: techwell,tw9900
+
+ reg:
+ maxItems: 1
+
+ vdd-supply:
+ description: VDD power supply
+
+ reset-gpios:
+ description: GPIO descriptor for the RESET input pin
+ maxItems: 1
+
+ powerdown-gpios:
+ description: GPIO descriptor for the POWERDOWN input pin
+ maxItems: 1
+
+ ports:
+ $ref: /schemas/graph.yaml#/properties/ports
+ properties:
+ port@3:
+ $ref: /schemas/graph.yaml#/properties/port
+ description: Video port for the decoder output.
+
+ patternProperties:
+ "^port@[0-2]$":
+ $ref: /schemas/graph.yaml#/properties/port
+ description: Analog video input port.
+
+ required:
+ - port@3
+
+required:
+ - compatible
+ - ports
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ video-decoder@44 {
+ compatible = "techwell,tw9900";
+ reg = <0x44>;
+
+ vdd-supply = <&tw9900_supply>;
+ reset-gpios = <&gpio2 5 GPIO_ACTIVE_LOW>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@3 {
+ reg = <3>;
+ endpoint {
+ remote-endpoint = <&vip_in>;
+ };
+ };
+ };
+ };
+ };
--
2.41.0