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

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Message-ID: <d5b2b2584fd471a037e574086bfd193b22fb9587.1697463708.git.mehdi.djait@bootlin.com>
Date:   Mon, 16 Oct 2023 15:58:32 +0200
From:   Mehdi Djait <mehdi.djait@...tlin.com>
To:     mchehab@...nel.org, hverkuil-cisco@...all.nl,
        krzysztof.kozlowski+dt@...aro.org, robh+dt@...nel.org,
        conor+dt@...nel.org, laurent.pinchart@...asonboard.com
Cc:     linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, thomas.petazzoni@...tlin.com,
        alexandre.belloni@...tlin.com, maxime.chevallier@...tlin.com,
        paul.kocialkowski@...tlin.com,
        Mehdi Djait <mehdi.djait@...tlin.com>
Subject: [PATCH v7 2/3] media: dt-bindings: media: i2c: Add bindings for TW9900

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@...tlin.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@...nel.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@...tlin.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