linux-kernel - Re: [PATCH v4 1/2] dt-bindings: input: bindings for Adafruit Seesaw Gamepad

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Date:   Thu, 12 Oct 2023 16:24:24 +0530
From:   Anshul Dalal <anshulusr@...il.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        linux-input@...r.kernel.org, devicetree@...r.kernel.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>,
        Shuah Khan <skhan@...uxfoundation.org>,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 1/2] dt-bindings: input: bindings for Adafruit Seesaw
 Gamepad

On 10/12/23 14:09, Krzysztof Kozlowski wrote:
> On 10/10/2023 20:48, Anshul Dalal wrote:
>> Adds bindings for the Adafruit Seesaw Gamepad.
>>
>> The gamepad functions as an i2c device with the default address of 0x50
>> and has an IRQ pin that can be enabled in the driver to allow for a rising
>> edge trigger on each button press or joystick movement.
>>
>> Product page:
>>   https://www.adafruit.com/product/5743
>> Arduino driver:
>>   https://github.com/adafruit/Adafruit_Seesaw
>>
>> Signed-off-by: Anshul Dalal <anshulusr@...il.com>
>> ---
>>
>> Changes for v4:
>> - Fixed the URI for the id field
>> - Added `interrupts` property
>>
>> Changes for v3:
>> - Updated id field to reflect updated file name from previous version
>> - Added `reg` property
>>
>> Changes for v2:
>> - Renamed file to `adafruit,seesaw-gamepad.yaml`
>> - Removed quotes for `$id` and `$schema`
>> - Removed "Bindings for" from the description
>> - Changed node name to the generic name "joystick"
>> - Changed compatible to 'adafruit,seesaw-gamepad' instead of
>>   'adafruit,seesaw_gamepad'
>>
>>  .../input/adafruit,seesaw-gamepad.yaml        | 59 +++++++++++++++++++
>>  1 file changed, 59 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/input/adafruit,seesaw-gamepad.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/input/adafruit,seesaw-gamepad.yaml b/Documentation/devicetree/bindings/input/adafruit,seesaw-gamepad.yaml
>> new file mode 100644
>> index 000000000000..e8e676006d2f
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/input/adafruit,seesaw-gamepad.yaml
>> @@ -0,0 +1,59 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/input/adafruit,seesaw-gamepad.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Adafruit Mini I2C Gamepad with seesaw
>> +
>> +maintainers:
>> +  - Anshul Dalal <anshulusr@...il.com>
>> +
>> +description: |
>> +  Adafruit Mini I2C Gamepad
>> +
>> +    +-----------------------------+
>> +    |   ___                       |
>> +    |  /   \               (X)    |
>> +    | |  S  |  __   __  (Y)   (A) |
>> +    |  \___/  |ST| |SE|    (B)    |
>> +    |                             |
>> +    +-----------------------------+
>> +
>> +  S -> 10-bit percision bidirectional analog joystick
>> +  ST -> Start
>> +  SE -> Select
>> +  X, A, B, Y -> Digital action buttons
>> +
>> +  Product page: https://www.adafruit.com/product/5743
>> +  Arduino Driver: https://github.com/adafruit/Adafruit_Seesaw
>> +
>> +properties:
>> +  compatible:
>> +    const: adafruit,seesaw-gamepad
> 
> I thought seesaw is a name of a device, but it is not, thus it is  quite
> a generic compatible. Are you sure device does not have its name?
> Looking at product page, it indeed might not have.
> 

I chose the title from the datasheet:
https://cdn-learn.adafruit.com/downloads/pdf/gamepad-qt.pdf
It lists the product name as "Adafruit Mini I2C STEMMA QT Gamepad with
seesaw" with STEMMA QT being the name of the 4-pin i2c connector that
Adafruit uses on their products. That's the most specific name for the
product I could find.

> 
> Best regards,
> Krzysztof
> 

Thanks,
Anshul