linux-kernel - Re: [PATCH v4 2/3] dt-bindings: input: Add TouchNetix axiom touchscreen

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <8ac4a9924e1d3b98c9f74dcb07b044b2@bootlin.com>
Date:   Tue, 05 Dec 2023 10:17:56 +0100
From:   Kamel BOUHARA <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, Marco Felsch <m.felsch@...gutronix.de>,
        Jeff LaBundy <jeff@...undy.com>,
        catalin.popescu@...ca-geosystems.com,
        mark.satterthwaite@...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 v4 2/3] dt-bindings: input: Add TouchNetix axiom
 touchscreen

Le 2023-12-05 09:15, Krzysztof Kozlowski a écrit :
> On 04/12/2023 15:05, Kamel Bouhara wrote:
>> Add the TouchNetix axiom I2C touchscreen device tree bindings
>> documentation.
>> 
>> Signed-off-by: Kamel Bouhara <kamel.bouhara@...tlin.com>
> 
>> +$id: 
>> http://devicetree.org/schemas/input/touchscreen/touchnetix,ax54a.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: TouchNetix Axiom series touchscreen controller
>> +
>> +maintainers:
>> +  - Kamel Bouhara <kamel.bouhara@...tlin.com>
>> +
> 
> Why you do not have ref to touchscreen? Is it not a touchscreen?

The common properties are not used or applicable here, should I still 
ref touchscreen ?

> 
> 
>> +properties:
>> +  compatible:
>> +    const: touchnetix,ax54a
>> +
>> +  reg:
>> +    const: 0x66
>> +
>> +  interrupts:
>> +    maxItems: 1
>> +
>> +  reset-gpios:
>> +    maxItems: 1
>> +
>> +  poll-interval:
>> +    description: Poll interval time in milliseconds.
> 
> Missing type or missing ref to input. It seems you want to use existing
> property thus no type, but you did not reference input.yaml
> 

Ok is this the right way to do it :

allOf:
   - $ref: input.yaml#

properties:

   poll-interval: true

>> +
>> +  VDDA-supply:
> 
> lowercase
> 
>> +    description: Analog power supply regulator on VDDA pin
>> +
>> +  VDDI-supply:
> 
> lowercase
> 

Ack.

>> +    description: I/O power supply regulator on VDDI pin
>> +
>> +required:
>> +  - compatible
>> +  - reg
> 
> Supplies are usually required. Devices rarely can operate without  
> power.

Indeed, can I still have them optional in the driver ?

I have fixed regulators and Im testing on x86 hence I
would like to avoid having extra acpi code to supply them.

> 
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> +  - |
>> +    #include <dt-bindings/gpio/gpio.h>
>> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
>> +    i2c {
>> +      #address-cells = <1>;
>> +      #size-cells = <0>;
> 
> Blank line

Ack.

> 
>> +      touchscreen@66 {
>> +        compatible = "touchnetix,ax54a";
>> +        reg = <0x66>;
>> +        interrupt-parent = <&gpio2>;
>> +        interrupts = <2 IRQ_TYPE_EDGE_FALLING>;
>> +        reset-gpios = <&gpio1 1 GPIO_ACTIVE_HIGH>;
>> +      };
> 
> Best regards,
> Krzysztof

Thanks
--
Kamel Bouhara, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com