linux-kernel - Re: [PATCH v9 3/3] dt-bindings: input: Update dtbinding for adp5588

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Message-ID: <c230faec-d359-461e-a717-6708d2710e42@kernel.org>
Date: Tue, 6 Aug 2024 11:04:00 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: utsav.agarwal@...log.com, Michael Hennerich
 <michael.hennerich@...log.com>, Dmitry Torokhov <dmitry.torokhov@...il.com>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Nuno Sá
 <nuno.sa@...log.com>
Cc: linux-input@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org,
 Arturs Artamonovs <arturs.artamonovs@...log.com>,
 Vasileios Bimpikas <vasileios.bimpikas@...log.com>,
 Oliver Gaskell <oliver.gaskell@...log.com>
Subject: Re: [PATCH v9 3/3] dt-bindings: input: Update dtbinding for adp5588

On 06/08/2024 10:48, Utsav Agarwal via B4 Relay wrote:
> From: Utsav Agarwal <utsav.agarwal@...log.com>
> 

A nit, subject: drop second/last, redundant "dtbinding". The
"dt-bindings" prefix is already stating that these are bindings.
See also:
https://elixir.bootlin.com/linux/v6.7-rc8/source/Documentation/devicetree/bindings/submitting-patches.rst#L18

Subject: everything is an update. Be descriptive and specific.

> Updating dt bindings for adp5588. Since the device can now function in a
> purely gpio mode, the following keypad specific properties are now made

Hardware changed? How?

> optional:
> 	- interrupts
> 	- keypad,num-rows
> 	- keypad,num-columns
> 	- linux,keymap
> 
> However the above properties are required to be specified when
> configuring the device as a keypad, dependencies have been added
> such that specifying either one would require the remaining as well.
> 
> Note that interrupts are optional, but required when the device has
> either been configured in keypad mode or as an interrupt controller.
> 
> Signed-off-by: Utsav Agarwal <utsav.agarwal@...log.com>
> ---
>  .../devicetree/bindings/input/adi,adp5588.yaml     | 51 +++++++++++++++++++---
>  1 file changed, 45 insertions(+), 6 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/input/adi,adp5588.yaml b/Documentation/devicetree/bindings/input/adi,adp5588.yaml
> index 26ea66834ae2..827d72ece54b 100644
> --- a/Documentation/devicetree/bindings/input/adi,adp5588.yaml
> +++ b/Documentation/devicetree/bindings/input/adi,adp5588.yaml
> @@ -49,7 +49,12 @@ properties:
>    interrupt-controller:
>      description:
>        This property applies if either keypad,num-rows lower than 8 or
> -      keypad,num-columns lower than 10.
> +      keypad,num-columns lower than 10. This property is optional if
> +      keypad,num-rows or keypad,num-columns are not specified since the
> +      device then acts as gpio only, during which interrupts may or may
> +      not be utilized. If specified however, interrupts must be also be
> +      provided as all interrupt communication is h

Don't repeat constraints in free form text.


andled via a single
> +      interrupt line.
>  
>    '#interrupt-cells':
>      const: 2
> @@ -65,13 +70,30 @@ properties:
>      minItems: 1
>      maxItems: 2
>  
> +
> +dependencies:
> +  keypad,num-rows:
> +    - linux,keymap
> +    - keypad,num-columns
> +  keypad,num-columns:
> +    - linux,keymap
> +    - keypad,num-rows
> +  linux,keymap:
> +    - keypad,num-rows
> +    - keypad,num-columns
> +  interrupt-controller:
> +    - interrupts

How is this related to this patchset? Why? I don't understand what are
you trying to achieve here. Hardware changed? Are you fixing something?
How many issues are you fixing in one (!!!) commit?

> +
> +if:
> +  required:
> +    - linux,keymap
> +then:
> +  required:
> +    - interrupts
> +
>  required:
>    - compatible
>    - reg
> -  - interrupts
> -  - keypad,num-rows
> -  - keypad,num-columns
> -  - linux,keymap
>  
>  unevaluatedProperties: false
>  
> @@ -108,4 +130,21 @@ examples:
>              >;
>          };
>      };
> -...
> +
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    #include <dt-bindings/input/input.h>
> +    #include <dt-bindings/gpio/gpio.h>

Where do you use these headers?

> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +        gpio@34 {
> +            compatible = "adi,adp5588";
> +            reg = <0x34>;
> +
> +            #gpio-cells = <2>;
> +            gpio-controller;
> +        };
> +    };
> +
> +.

Why this change?


Best regards,
Krzysztof