Message-Id: <20220818143307.967150-4-m.felsch@pengutronix.de>
Date:   Thu, 18 Aug 2022 16:33:06 +0200
From:   Marco Felsch <m.felsch@...gutronix.de>
To:     mchehab@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, vkoul@...nel.org, kishon@...com,
        sakari.ailus@...ux.intel.com, hverkuil@...all.nl,
        jacopo@...ndi.org, laurent.pinchart+renesas@...asonboard.com
Cc:     linux-kernel@...r.kernel.org, linux-phy@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-media@...r.kernel.org,
        kernel@...gutronix.de
Subject: [PATCH 3/4] media: dt-bindings: add bindings for Toshiba TC358746

Add the bindings for the Toshiba TC358746 Parallel <-> MIPI-CSI bridge
driver.

Signed-off-by: Marco Felsch <m.felsch@...gutronix.de>
---
 .../bindings/media/i2c/toshiba,tc358746.yaml  | 157 ++++++++++++++++++
 1 file changed, 157 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/i2c/toshiba,tc358746.yaml

diff --git a/Documentation/devicetree/bindings/media/i2c/toshiba,tc358746.yaml b/Documentation/devicetree/bindings/media/i2c/toshiba,tc358746.yaml
new file mode 100644
index 000000000000..9783cca363c6
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/toshiba,tc358746.yaml
@@ -0,0 +1,157 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/i2c/toshiba,tc358746.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Toshiba TC358746 Parallel to MIPI CSI2 Bridge
+
+maintainers:
+  - Marco Felsch <kernel@...gutronix.de>
+
+description: |-
+  The Toshiba TC358746 converts a parallel video stream into a MIPI CSI-2
+  stream. The direction can be either parallel-in -> csi-out or csi-in ->
+  parallel-out The chip is programmable trough I2C and SPI but the SPI
+  interface is only supported in parallel-in -> csi-out mode.
+
+  Note that the current device tree bindings only support the
+  parallel-in -> csi-out path.
+
+properties:
+  compatible:
+    const: toshiba,tc358746
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    description:
+      The phandle to the reference clock source. This corresponds to the
+      hardware pin REFCLK.
+    maxItems: 1
+
+  clock-names:
+    const: refclk
+
+# The bridge can act as clock provider for the sensor. To enable this support
+# #clock-cells must be specified. Attention if this feature is used than the
+# mclk rate must be at least: (2 * link-frequency) / 8
+#                             `------------------´   ^
+#                             internal PLL rate   smallest possible mclk-div
+  "#clock-cells":
+    const: 0
+
+  clock-output-names:
+    description:
+      The clock name of the MCLK output, the default name is tc358746-mclk.
+    maxItems: 1
+
+  vddc-supply:
+    description: Digital core voltage supply, 1.2 volts
+
+  vddio-supply:
+    description: Digital I/O voltage supply, 1.8 volts
+
+  vddmipi-supply:
+    description: MIPI CSI phy voltage supply, 1.2 volts
+
+  reset-gpios:
+    description:
+      The phandle and specifier for the GPIO that controls the chip reset.
+      This corresponds to the hardware pin RESX which is physically active low.
+    maxItems: 1
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+    properties:
+      port@0:
+        $ref: /schemas/graph.yaml#/properties/port
+        description: Input port
+
+      port@1:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        description: Output port
+
+        properties:
+          endpoint:
+            $ref: /schemas/media/video-interfaces.yaml#
+            unevaluatedProperties: false
+
+            properties:
+              data-lanes:
+                minItems: 1
+                maxItems: 4
+
+              clock-noncontinuous: true
+              link-frequencies: true
+
+            required:
+              - data-lanes
+              - link-frequencies
+
+    required:
+      - port@0
+      - port@1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - vddc-supply
+  - vddio-supply
+  - vddmipi-supply
+  - ports
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      csi-bridge@e {
+        compatible = "toshiba,tc358746";
+        reg = <0xe>;
+
+        clocks = <&refclk>;
+        clock-names = "refclk";
+
+        reset-gpios = <&gpio 2 GPIO_ACTIVE_LOW>;
+
+        vddc-supply = <&v1_2d>;
+        vddio-supply = <&v1_8d>;
+        vddmipi-supply = <&v1_2d>;
+
+        /* sensor mclk provider */
+        #clock-cells = <0>;
+
+        ports {
+          #address-cells = <1>;
+          #size-cells = <0>;
+
+          /* Input */
+          port@0 {
+            reg = <0>;
+            tc358746_in: endpoint {
+              remote-endpoint = <&sensor_out>;
+              };
+          };
+
+          /* Output */
+          port@1 {
+            reg = <1>;
+            tc358746_out: endpoint {
+              remote-endpoint = <&mipi_csi2_in>;
+              data-lanes = <1 2>;
+              clock-noncontinuous;
+              link-frequencies = /bits/ 64 <216000000>;
+            };
+          };
+        };
+      };
+    };
-- 
2.30.2

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