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Date: Wed, 13 May 2020 14:28:19 +0200
From: Jacopo Mondi <jacopo@...ndi.org>
To: Rob Herring <robh@...nel.org>
Cc: Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
linux-renesas-soc@...r.kernel.org, linux-media@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Kieran Bingham <kieran.bingham@...asonboard.com>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Niklas Söderlund <niklas.soderlund@...natech.se>,
sakari.ailus@....fi, Hans Verkuil <hverkuil@...all.nl>,
Hyun Kwon <hyunk@...inx.com>,
Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
Jacopo Mondi <jacopo+renesas@...ndi.org>,
Niklas Söderlund
<niklas.soderlund+renesas@...natech.se>
Subject: Re: [PATCH v9 1/4] dt-bindings: media: i2c: Add bindings for Maxim
Integrated MAX9286
Hi Rob,
On Tue, May 12, 2020 at 05:36:10PM -0500, Rob Herring wrote:
> On Tue, May 12, 2020 at 04:51:02PM +0100, Kieran Bingham wrote:
> > 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
> >
> > .../bindings/media/i2c/maxim,max9286.yaml | 287 ++++++++++++++++++
> > 1 file changed, 287 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..f9d3e5712c59
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml
> > @@ -0,0 +1,287 @@
> > +# 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
> > +
> > + 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. The serializer
> > + device on the remote end of the GMSL link shall be modelled as a child
> > + node of the corresponding I2C bus.
> > +
> > + properties:
> > + '#address-cells':
> > + const: 1
> > +
> > + '#size-cells':
> > + const: 0
> > +
> > + additionalProperties: false
>
> Wrong indentation. Should be 2 more or this is a DT property.
>
Thanks, updating the dt tools helped spotting the error locally as
well.
This fixes the error reported in the previous email, now I get a
Documentation/devicetree/bindings/media/i2c/maxim,max9286.example.dt.yaml:
gmsl-deserializer@2c: i2c-mux: 'i2c@0', 'i2c@1', 'i2c@2', 'i2c@3' do not match any of the regexes: 'pinctrl-[0-9]+'
which makes me think the i2c-mux child nodes are under-specified in
this bindings.
I have expanded them and will reply with a fixup to be applied on top
of this patch to ease review and eventually include in v10.
Thanks
j
> > +
> > +required:
> > + - compatible
> > + - reg
> > + - ports
> > + - i2c-mux
> > +
> > +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>;
> > +
> > + 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 {
> > + reg = <0x51>;
> > +
> > + port {
> > + rdacm20_out0: endpoint {
> > + remote-endpoint = <&max9286_in0>;
> > + };
> > + };
> > +
> > + };
> > + };
> > +
> > + i2c@1 {
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > + reg = <1>;
> > +
> > + camera@52 {
> > + reg = <0x52>;
> > +
> > + port {
> > + rdacm20_out1: endpoint {
> > + remote-endpoint = <&max9286_in1>;
> > + };
> > + };
> > + };
> > + };
> > +
> > + i2c@2 {
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > + reg = <2>;
> > +
> > + camera@53 {
> > + reg = <0x53>;
> > +
> > + port {
> > + rdacm20_out2: endpoint {
> > + remote-endpoint = <&max9286_in2>;
> > + };
> > + };
> > + };
> > + };
> > +
> > + i2c@3 {
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > + reg = <3>;
> > +
> > + camera@54 {
> > + reg = <0x54>;
> > +
> > + port {
> > + rdacm20_out3: endpoint {
> > + remote-endpoint = <&max9286_in3>;
> > + };
> > + };
> > + };
> > + };
> > + };
> > + };
> > + };
> > --
> > 2.25.1
> >
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