linux-kernel - [PATCH v2 1/2] media: dt-bindings: alvium: add document YAML binding

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Date:   Fri, 26 May 2023 19:39:43 +0200
From:   Tommaso Merciai <tomm.merciai@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     jacopo.mondi@...asonboard.com, laurent.pinchart@...asonboard.com,
        martin.hecht@...et.eu, linuxfancy@...glegroups.com,
        Tommaso Merciai <tomm.merciai@...il.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Hans Verkuil <hverkuil@...all.nl>,
        Marco Felsch <m.felsch@...gutronix.de>,
        Gerald Loacker <gerald.loacker@...fvision.net>,
        Krzysztof Hałasa <khalasa@...p.pl>,
        Shawn Tu <shawnx.tu@...el.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Benjamin Mugnier <benjamin.mugnier@...s.st.com>,
        Mikhail Rudenko <mike.rudenko@...il.com>,
        Nicholas Roth <nicholas@...hemail.net>,
        linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/2] media: dt-bindings: alvium: add document YAML binding

Add documentation of device tree in YAML schema for the ALVIUM
Camera from Allied Vision Inc.

References:
 - https://www.alliedvision.com/en/products/embedded-vision-solutions

Signed-off-by: Tommaso Merciai <tomm.merciai@...il.com>
---
Changes since v1:
 - Fixed build error as suggested by RHerring bot

 .../media/i2c/alliedvision,alvium.yaml        | 115 ++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/i2c/alliedvision,alvium.yaml

diff --git a/Documentation/devicetree/bindings/media/i2c/alliedvision,alvium.yaml b/Documentation/devicetree/bindings/media/i2c/alliedvision,alvium.yaml
new file mode 100644
index 000000000000..81e9e560c99d
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/alliedvision,alvium.yaml
@@ -0,0 +1,115 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/i2c/alliedvision,alvium.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Alliedvision Alvium Camera
+
+maintainers:
+  - Tommaso Merciai <tomm.merciai@...il.com>
+  - Martin Hecht <martin.hecht@...et.eu>
+
+allOf:
+  - $ref: /schemas/media/video-interface-devices.yaml#
+
+properties:
+  compatible:
+    const: alliedvision,alvium
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    description: XCLK Input Clock
+
+  clock-names:
+    const: xclk
+
+  powerdown-gpios:
+    maxItems: 1
+    description: >
+      Reference to the GPIO connected to the powerdown pin, if any.
+
+  reset-gpios:
+    maxItems: 1
+    description: >
+      Reference to the GPIO connected to the reset pin, if any.
+
+  streamon-delay:
+    maxItems: 1
+    description: >
+      Delay before camera start capturing frames in us.
+
+  rotation:
+    enum:
+      - 0
+      - 180
+
+  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:
+            const: 0
+          data-lanes:
+            minItems: 1
+            maxItems: 4
+          link-frequencies: true
+
+        required:
+          - data-lanes
+          - link-frequencies
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - port
+
+additionalProperties: false
+
+examples:
+  - |
+      #include <dt-bindings/gpio/gpio.h>
+      #include <dt-bindings/clock/imx8mp-clock.h>
+
+      i2c {
+          #address-cells = <1>;
+          #size-cells = <0>;
+
+          camera: alvium@3c {
+              compatible = "alliedvision,alvium";
+              pinctrl-names = "default";
+              pinctrl-0 = <&pinctrl_csi0_pwn>, <&pinctrl_csi0_rst>, <&pinctrl_csi_mclk>;
+              reg = <0x3c>;
+              clocks = <&clk IMX8MP_CLK_IPP_DO_CLKO2>;
+              clock-names = "xclk";
+              assigned-clocks = <&clk IMX8MP_CLK_IPP_DO_CLKO2>;
+              assigned-clock-parents = <&clk IMX8MP_CLK_24M>;
+              assigned-clock-rates = <24000000>;
+              streamon-delay = <20>;
+              powerdown-gpios = <&gpio2 11 GPIO_ACTIVE_HIGH>;
+              reset-gpios = <&gpio1 6 GPIO_ACTIVE_LOW>;
+              status = "okay";
+
+              port {
+                  alvium_out: endpoint {
+                      remote-endpoint = <&mipi_csi_0_in>;
+                      data-lanes = <1 2 3 4>;
+                      link-frequencies = /bits/ 64 <681250000>;
+                      clock-lanes = <0>;
+                  };
+              };
+          };
+      };
+
+...
-- 
2.34.1