linux-kernel - Re: [PATCH v2 2/3] dt-bindings: input: Add bindings for TouchNetix axiom touchscreen

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Message-ID: <79160a2ebe3fd35fe7f9b93e30cf89fa@bootlin.com>
Date:   Tue, 10 Oct 2023 09:15:08 +0200
From:   kamel.bouhara@...tlin.com
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Henrik Rydberg <rydberg@...math.org>,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, mark.satterthwaite@...chnetix.com,
        pedro.torruella@...chnetix.com, bartp@...sheep.co.uk,
        hannah.rossiter@...chnetix.com,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Gregory Clement <gregory.clement@...tlin.com>,
        bsp-development.geo@...ca-geosystems.com
Subject: Re: [PATCH v2 2/3] dt-bindings: input: Add bindings for TouchNetix
 axiom touchscreen

Hello Krzysztof,

Le 2023-10-09 17:05, Krzysztof Kozlowski a écrit :
> On 09/10/2023 15:44, Kamel Bouhara wrote:
>> Add the TouchNetix axiom I2C touchscreen device tree bindings
>> documentation.
> 
> A nit, subject: drop second/last, redundant "bindings for". The
> "dt-bindings" prefix is already stating that these are bindings.
> 

OK.

>> Signed-off-by: Kamel Bouhara <kamel.bouhara@...tlin.com>
>> ---
>>  .../touchscreen/touchnetix,axiom-ax54a.yaml   | 51 
>> +++++++++++++++++++
>>  MAINTAINERS                                   |  6 +++
>>  2 files changed, 57 insertions(+)
>>  create mode 100644 
>> Documentation/devicetree/bindings/input/touchscreen/touchnetix,axiom-ax54a.yaml
>> 
>> diff --git 
>> a/Documentation/devicetree/bindings/input/touchscreen/touchnetix,axiom-ax54a.yaml 
>> b/Documentation/devicetree/bindings/input/touchscreen/touchnetix,axiom-ax54a.yaml
>> new file mode 100644
>> index 000000000000..41201d7112a6
>> --- /dev/null
>> +++ 
>> b/Documentation/devicetree/bindings/input/touchscreen/touchnetix,axiom-ax54a.yaml
>> @@ -0,0 +1,51 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: 
>> http://devicetree.org/schemas/input/touchscreen/touchnetix,axiom-ax54a.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: TouchNetix Axiom series touchscreen controller
>> +
>> +maintainers:
>> +  - Kamel Bouhara <kamel.bouhara@...tlin.com>
>> +
>> +properties:
>> +  compatible:
>> +    const: touchnetix,axiom-ax54a
>> +
>> +  reg:
>> +    const: 0x66
>> +
>> +  interrupts:
>> +    maxItems: 1
>> +
>> +  irq-gpios:
>> +    maxItems: 1
> 
> Why these are GPIOs? Interrupts are usually just interrupts... You need
> to clearly describe this.
> 

I've been using this for some specific acpi stuff hence it need to be 
removed.

> 
>> +
>> +  reset-gpios:
>> +    maxItems: 1
>> +
>> +additionalProperties: false
> 
> This goes after required: block.
> 
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +
>> +examples:
>> +  - |
>> +    #include <dt-bindings/gpio/gpio.h>
>> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
>> +    i2c {
>> +      #address-cells = <1>;
>> +      #size-cells = <0>;
>> +      axiom@66 {
> 
> Node names should be generic. See also an explanation and list of
> examples (not exhaustive) in DT specification:
> https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation
> 

Ack.

> 
> 
>> +        compatible = "touchnetix,axiom-ax54a";
>> +        reg = <0x66>;
>> +        interrupt-parent = <&gpio2>;
>> +        interrupts = <2 IRQ_TYPE_EDGE_FALLING>;
>> +        irq-gpios = <&gpio2 0 GPIO_ACTIVE_LOW>;
> 
> Eh? This looks really wrong.

OK let's clean that as well.

Thanks

> 
> 
> Best regards,
> Krzysztof