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Message-Id: <20200612144713.502006-2-kieran.bingham+renesas@ideasonboard.com>
Date: Fri, 12 Jun 2020 15:47:10 +0100
From: Kieran Bingham <kieran.bingham+renesas@...asonboard.com>
To: linux-renesas-soc@...r.kernel.org, linux-media@...r.kernel.org,
linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org,
Mauro Carvalho Chehab <mchehab@...nel.org>,
sakari.ailus@....fi
Cc: Kieran Bingham <kieran.bingham@...asonboard.com>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Jacopo Mondi <jacopo@...ndi.org>,
Niklas Söderlund <niklas.soderlund@...natech.se>,
Hans Verkuil <hverkuil@...all.nl>,
Hyun Kwon <hyunk@...inx.com>,
Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
Rob Herring <robh+dt@...nel.org>,
Linus Walleij <linus.walleij@...aro.org>,
Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
Jacopo Mondi <jacopo+renesas@...ndi.org>,
Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
Niklas Söderlund
<niklas.soderlund+renesas@...natech.se>,
Rob Herring <robh@...nel.org>
Subject: [PATCH v10 1/4] dt-bindings: media: i2c: Add bindings for Maxim Integrated MAX9286
From: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
The MAX9286 deserializes video data received on up to 4 Gigabit
Multimedia Serial Links (GMSL) and outputs them on a CSI-2 port using up
to 4 data lanes.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@...ndi.org>
Signed-off-by: Kieran Bingham <kieran.bingham+renesas@...asonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@...natech.se>
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@...natech.se>
Reviewed-by: Rob Herring <robh@...nel.org>
---
v7:
- Collect Rob's RB tag
- Remove redundant maxItems from remote-endpoints
- Fix SPDX licence tag
v10:
[Jacopo]
- Fix dt-validation
- Fix dt-binding examples with 2 reg entries
[Kieran]
- Correctly match the hex camera node reg
- Add (required) GPIO controller support
.../bindings/media/i2c/maxim,max9286.yaml | 366 ++++++++++++++++++
1 file changed, 366 insertions(+)
create mode 100644 Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml
diff --git a/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml b/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml
new file mode 100644
index 000000000000..c632a10a753a
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml
@@ -0,0 +1,366 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2019 Renesas Electronics Corp.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/i2c/maxim,max9286.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim Integrated Quad GMSL Deserializer
+
+maintainers:
+ - Jacopo Mondi <jacopo+renesas@...ndi.org>
+ - Kieran Bingham <kieran.bingham+renesas@...asonboard.com>
+ - Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
+ - Niklas Söderlund <niklas.soderlund+renesas@...natech.se>
+
+description: |
+ The MAX9286 deserializer receives video data on up to 4 Gigabit Multimedia
+ Serial Links (GMSL) and outputs them on a CSI-2 D-PHY port using up to 4 data
+ lanes.
+
+ In addition to video data, the GMSL links carry a bidirectional control
+ channel that encapsulates I2C messages. The MAX9286 forwards all I2C traffic
+ not addressed to itself to the other side of the links, where a GMSL
+ serializer will output it on a local I2C bus. In the other direction all I2C
+ traffic received over GMSL by the MAX9286 is output on the local I2C bus.
+
+properties:
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ compatible:
+ const: maxim,max9286
+
+ reg:
+ description: I2C device address
+ maxItems: 1
+
+ poc-supply:
+ description: Regulator providing Power over Coax to the cameras
+ maxItems: 1
+
+ enable-gpios:
+ description: GPIO connected to the \#PWDN pin with inverted polarity
+ maxItems: 1
+
+ gpio-controller: true
+
+ '#gpio-cells':
+ const: 2
+
+ ports:
+ type: object
+ description: |
+ The connections to the MAX9286 GMSL and its endpoint nodes are modelled
+ using the OF graph bindings in accordance with the video interface
+ bindings defined in
+ Documentation/devicetree/bindings/media/video-interfaces.txt.
+
+ The following table lists the port number corresponding to each device
+ port.
+
+ Port Description
+ ----------------------------------------
+ Port 0 GMSL Input 0
+ Port 1 GMSL Input 1
+ Port 2 GMSL Input 2
+ Port 3 GMSL Input 3
+ Port 4 CSI-2 Output
+
+ properties:
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ port@[0-3]:
+ type: object
+ properties:
+ reg:
+ enum: [ 0, 1, 2, 3 ]
+
+ endpoint:
+ type: object
+
+ properties:
+ remote-endpoint:
+ description: |
+ phandle to the remote GMSL source endpoint subnode in the
+ remote node port.
+
+ required:
+ - remote-endpoint
+
+ required:
+ - reg
+ - endpoint
+
+ additionalProperties: false
+
+ port@4:
+ type: object
+ properties:
+ reg:
+ const: 4
+
+ endpoint:
+ type: object
+
+ properties:
+ remote-endpoint:
+ description: phandle to the remote CSI-2 sink endpoint.
+
+ data-lanes:
+ description: array of physical CSI-2 data lane indexes.
+
+ required:
+ - remote-endpoint
+ - data-lanes
+
+ required:
+ - reg
+ - endpoint
+
+ additionalProperties: false
+
+ required:
+ - port@4
+
+ i2c-mux:
+ type: object
+ description: |
+ Each GMSL link is modelled as a child bus of an i2c bus
+ multiplexer/switch, in accordance with bindings described in
+ Documentation/devicetree/bindings/i2c/i2c-mux.txt.
+
+ properties:
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ patternProperties:
+ "^i2c@[0-3]$":
+ type: object
+ description: |
+ Child node of the i2c bus multiplexer which represents a GMSL link.
+ Each serializer device on the GMSL link remote end is represented with
+ an i2c-mux child node. The MAX9286 chip supports up to 4 GMSL
+ channels.
+
+ properties:
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ reg:
+ description: The index of the GMSL channel.
+ maxItems: 1
+
+ patternProperties:
+ "^camera@[a-f0-9]+$":
+ type: object
+ description: |
+ The remote camera device, composed by a GMSL serializer and a
+ connected video source.
+
+ properties:
+ compatible:
+ description: The remote device compatible string.
+
+ reg:
+ minItems: 2
+ maxItems: 3
+ description: |
+ The I2C addresses to be assigned to the remote devices through
+ address reprogramming. The number of entries depends on the
+ requirements of the currently connected remote device.
+
+ port:
+ type: object
+
+ properties:
+ endpoint:
+ type: object
+
+ properties:
+ remote-endpoint:
+ description: phandle to the MAX9286 sink endpoint.
+
+ required:
+ - remote-endpoint
+
+ additionalProperties: false
+
+ required:
+ - endpoint
+
+ additionalProperties: false
+
+ required:
+ - compatible
+ - reg
+ - port
+
+ additionalProperties: false
+
+ additionalProperties: false
+
+ additionalProperties: false
+
+required:
+ - compatible
+ - reg
+ - ports
+ - i2c-mux
+ - gpio-controller
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+
+ i2c@...d8000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ reg = <0 0xe66d8000 0 0x40>;
+
+ gmsl-deserializer@2c {
+ compatible = "maxim,max9286";
+ reg = <0x2c>;
+ poc-supply = <&camera_poc_12v>;
+ enable-gpios = <&gpio 13 GPIO_ACTIVE_HIGH>;
+
+ gpio-controller;
+ #gpio-cells = <2>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+
+ max9286_in0: endpoint {
+ remote-endpoint = <&rdacm20_out0>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+
+ max9286_in1: endpoint {
+ remote-endpoint = <&rdacm20_out1>;
+ };
+ };
+
+ port@2 {
+ reg = <2>;
+
+ max9286_in2: endpoint {
+ remote-endpoint = <&rdacm20_out2>;
+ };
+ };
+
+ port@3 {
+ reg = <3>;
+
+ max9286_in3: endpoint {
+ remote-endpoint = <&rdacm20_out3>;
+ };
+ };
+
+ port@4 {
+ reg = <4>;
+
+ max9286_out: endpoint {
+ data-lanes = <1 2 3 4>;
+ remote-endpoint = <&csi40_in>;
+ };
+ };
+ };
+
+ i2c-mux {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ i2c@0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0>;
+
+ camera@51 {
+ compatible = "imi,rdacm20";
+ reg = <0x51>, <0x61>;
+
+ port {
+ rdacm20_out0: endpoint {
+ remote-endpoint = <&max9286_in0>;
+ };
+ };
+
+ };
+ };
+
+ i2c@1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <1>;
+
+ camera@52 {
+ compatible = "imi,rdacm20";
+ reg = <0x52>, <0x62>;
+
+ port {
+ rdacm20_out1: endpoint {
+ remote-endpoint = <&max9286_in1>;
+ };
+ };
+ };
+ };
+
+ i2c@2 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <2>;
+
+ camera@53 {
+ compatible = "imi,rdacm20";
+ reg = <0x53>, <0x63>;
+
+ port {
+ rdacm20_out2: endpoint {
+ remote-endpoint = <&max9286_in2>;
+ };
+ };
+ };
+ };
+
+ i2c@3 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <3>;
+
+ camera@54 {
+ compatible = "imi,rdacm20";
+ reg = <0x54>, <0x64>;
+
+ port {
+ rdacm20_out3: endpoint {
+ remote-endpoint = <&max9286_in3>;
+ };
+ };
+ };
+ };
+ };
+ };
+ };
--
2.25.1
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