linux-kernel - Re: [PATCH v3 2/3] dt-bindings: touchscreen: Add HY46XX bindings

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Date:   Wed, 7 Apr 2021 19:57:05 +0200
From:   Giulio Benetti <giulio.benetti@...ettiengineering.com>
To:     Rob Herring <robh@...nel.org>
Cc:     linux-input@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        devicetree@...r.kernel.org,
        Jonathan Neuschäfer <j.ne@...teo.net>,
        Henrik Rydberg <rydberg@...math.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/3] dt-bindings: touchscreen: Add HY46XX bindings

Hello Rob, All,

On 4/6/21 3:24 PM, Rob Herring wrote:
> On Fri, 02 Apr 2021 18:16:26 +0200, Giulio Benetti wrote:
>> This adds device tree bindings for the Hycon HY46XX touchscreen series.
>>
>> Signed-off-by: Giulio Benetti <giulio.benetti@...ettiengineering.com>
>> ---
>> V1->V2:
>> As suggested by Rob Herring:
>> * fixed $id: address
>> * added "hycon," in front of every custom property
>> * changed all possible property to boolean type
>> * removed proximity-sensor-switch property since it's not handled in driver
>> V2->V3:
>> As suggested by Jonathan Neuschäfer:
>> * fixed some typo
>> * fixed description indentation
>> * improved boolean properties descriptions
>> * improved hycon,report-speed description
>> ---
>>   .../input/touchscreen/hycon,hy46xx.yaml       | 120 ++++++++++++++++++
>>   MAINTAINERS                                   |   6 +
>>   2 files changed, 126 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/input/touchscreen/hycon,hy46xx.yaml
>>
> 
> My bot found errors running 'make dt_binding_check' on your patch:
> 
> yamllint warnings/errors:
> 
> dtschema/dtc warnings/errors:
> Documentation/devicetree/bindings/input/touchscreen/hycon,hy46xx.example.dt.yaml:0:0: /example-0/i2c/hycon-hy4633@1c: failed to match any schema with compatible: ['hycon,hy4633']
> 
> See https://patchwork.ozlabs.org/patch/1461797
> 
> This check can fail if there are any dependencies. The base for a patch
> series is generally the most recent rc1.
> 
> If you already ran 'make dt_binding_check' and didn't see the above
> error(s), then make sure 'yamllint' is installed and dt-schema is up to
> date:

I've just send corrected patches.

Anyway I'd like to understand how to make dt_binding_check works correctly.

I've installed yamllint and 'make dt_binding_check' works but it still 
doesn't show that error up on compatible string.

yamllint I have is version 1.20.0

> pip3 install dtschema --upgrade

I've already tried with that too and dtschema version is:
1.3.8

I've read that dtc must be compiled with YAML output enabled and it 
seems to be so, since when I issue 'make dt_binding_check' from my file:
hycon,hy46xx.yaml(with compatible string wrong "hycon,hy4633")

these files are generated:
hycon,hy46xx.example.dts
```

/dts-v1/;
/plugin/; // silence any missing phandle references


/{
     compatible = "foo";
     model = "foo";
     interrupt-parent = <&foo>;
     #address-cells = <1>;
     #size-cells = <1>;



     example-0 {
         #address-cells = <1>;
         #size-cells = <1>;

         #include <dt-bindings/gpio/gpio.h>
         #include <dt-bindings/interrupt-controller/arm-gic.h>
         i2c {
           #address-cells = <1>;
           #size-cells = <0>;
           hycon-hy4633@1c {
             compatible = "hycon,hy4633";
             reg = <0x1c>;
             interrupt-parent = <&gpio2>;
             interrupts = <5 IRQ_TYPE_EDGE_FALLING>;
             reset-gpios = <&gpio2 6 GPIO_ACTIVE_LOW>;
           };
         };

     };
};

```

AND

hycon,hy46xx.example.dt.yaml
```
---
- compatible: ["foo"]
   model: ["foo"]
   interrupt-parent: [[!phandle 0xffffffff]]
   '#address-cells': [[0x1]]
   '#size-cells': [[0x1]]
   example-0:
     '#address-cells': [[0x1]]
     '#size-cells': [[0x1]]
     i2c:
       '#address-cells': [[0x1]]
       '#size-cells': [[0x0]]
       hycon-hy4633@1c:
         compatible: ["hycon,hy4633"]
         reg: [[0x1c]]
         interrupt-parent: [[!phandle 0xffffffff]]
         interrupts: [[0x5, 0x2]]
         reset-gpios: [[!phandle 0xffffffff, 0x6, 0x1]]
   __fixups__:
     foo: ["/:interrupt-parent:0"]
     gpio2: ["/example-0/i2c/hycon-hy4633@1c:interrupt-parent:0", 
"/example-0/i2c/hycon-hy4633@1c:reset-gpios:0"]
...
```

So I can't reproduce the problem, can you point me some documentation 
that I didn't see before?

Thank in advance
Best regards
-- 
Giulio Benetti
Benetti Engineering sas