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Date:   Thu, 8 Jun 2023 09:01:26 -0600
From:   Rob Herring <robh@kernel.org>
To:     Nikita Shubin <nikita.shubin@maquefel.me>
Cc:     Alexander Sverdlin <alexander.sverdlin@gmail.com>,
        Arnd Bergmann <arnd@arndb.de>,
        Linus Walleij <linus.walleij@linaro.org>,
        Dmitry Torokhov <dmitry.torokhov@gmail.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Michael Peters <mpeters@embeddedts.com>,
        Kris Bahnsen <kris@embeddedts.com>,
        linux-input@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1 27/43] dt-bindings: input: Add Cirrus EP93xx keypad
Message-ID: <20230608150126.GA2621694-robh@kernel.org>
References: <20230424123522.18302-1-nikita.shubin@maquefel.me>
 <20230601054549.10843-9-nikita.shubin@maquefel.me>
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On Thu, Jun 01, 2023 at 08:45:32AM +0300, Nikita Shubin wrote:
> Add YAML bindings for ep93xx SoC keypad.
> 
> Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
> ---
> 
> Notes:
>     v0 -> v1:
>     
>     - remove almost all but debounce-delay-ms and prescale
>     - s/ep9301-keypad/ep9307-keypad/ it's actually only for
>       ep9307, ep9312, ep9315
>     
>     Krzysztof Kozlowski:
>     - renamed file
>     - changed maintainers
>     - dropped quotes
>     - dropped clock-names
>     - use fallback compatible and list all possible compatibles
>     - fix ident
> 
>  .../bindings/input/cirrus,ep9307-keypad.yaml  | 86 +++++++++++++++++++
>  1 file changed, 86 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/input/cirrus,ep9307-keypad.yaml
> 
> diff --git a/Documentation/devicetree/bindings/input/cirrus,ep9307-keypad.yaml b/Documentation/devicetree/bindings/input/cirrus,ep9307-keypad.yaml
> new file mode 100644
> index 000000000000..c7eb10a84a6b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/input/cirrus,ep9307-keypad.yaml
> @@ -0,0 +1,86 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/input/cirrus,ep9307-keypad.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Cirrus ep93xx keypad
> +
> +maintainers:
> +  - Alexander Sverdlin <alexander.sverdlin@gmail.com>
> +
> +allOf:
> +  - $ref: /schemas/input/matrix-keymap.yaml#
> +
> +description: |

Don't need '|'.

> +  The KPP is designed to interface with a keypad matrix with 2-point contact
> +  or 3-point contact keys. The KPP is designed to simplify the software task
> +  of scanning a keypad matrix. The KPP is capable of detecting, debouncing,
> +  and decoding one or multiple keys pressed simultaneously on a keypad.
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - const: cirrus,ep9307-keypad
> +      - items:
> +          - enum:
> +              - cirrus,ep9312-keypad
> +              - cirrus,ep9315-keypad
> +          - const: cirrus,ep9307-keypad
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  cirrus,debounce-delay-ms:

Use the somewhat standard 'debounce-delay-ms'.

> +    description: |
> +          Time in microseconds that key must be pressed or
> +          released for state change interrupt to trigger.
> +
> +  cirrus,prescale:
> +    description: row/column counter pre-scaler load value
> +    $ref: /schemas/types.yaml#/definitions/uint32

Constraints?

> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +  - linux,keymap
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/cirrus,ep93xx-clock.h>
> +    #include <dt-bindings/input/input.h>
> +    keypad@800f0000 {
> +      compatible = "cirrus,ep9301-keypad";
> +      reg = <0x800f0000 0x0c>;
> +      interrupt-parent = <&vic0>;
> +      interrupts = <29>;
> +      clocks = <&syscon EP93XX_CLK_KEYPAD>;
> +      pinctrl-names = "default";
> +      pinctrl-0 = <&keypad_default_pins>;
> +      linux,keymap = <KEY_UP>,
> +                     <KEY_DOWN>,
> +                     <KEY_VOLUMEDOWN>,
> +                     <KEY_HOME>,
> +                     <KEY_RIGHT>,
> +                     <KEY_LEFT>,
> +                     <KEY_ENTER>,
> +                     <KEY_VOLUMEUP>,
> +                     <KEY_F6>,
> +                     <KEY_F8>,
> +                     <KEY_F9>,
> +                     <KEY_F10>,
> +                     <KEY_F1>,
> +                     <KEY_F2>,
> +                     <KEY_F3>,
> +                     <KEY_POWER>;
> +    };
> -- 
> 2.37.4
>