linux-kernel - Re: [PATCH v3 8/9] dt-bindings: auxdisplay: Add Maxim MAX6958/6959

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Message-ID: <CAMuHMdVjh3jofcf2SdjRO5bAfokEzjoxv_z89JJyyfwwt5DZsw@mail.gmail.com>
Date: Mon, 26 Feb 2024 16:52:34 +0100
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Andy Shevchenko <andy@...nel.org>, 
	Rob Herring <robh+dt@...nel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, 
	Robin van der Gracht <robin@...tonic.nl>, Paul Burton <paulburton@...nel.org>
Subject: Re: [PATCH v3 8/9] dt-bindings: auxdisplay: Add Maxim MAX6958/6959

Hi Andy,

On Mon, Feb 19, 2024 at 6:03 PM Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
> Add initial device tree documentation for Maxim MAX6958/6959.
> As per reviewer's request mention the fact of absence reset and
> power enable pins, since the hardware is quite simple.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

Thanks for your patch!

> --- /dev/null
> +++ b/Documentation/devicetree/bindings/auxdisplay/maxim,max6959.yaml
> @@ -0,0 +1,44 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/auxdisplay/maxim,max6959.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MAX6958/6959 7-segment LED display controller
> +
> +maintainers:
> +  - Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> +
> +description:
> +  The Maxim MAX6958/6959 7-segment LED display controller provides
> +  an I2C interface to up to four 7-segment LED digits. The MAX6959,
> +  in comparison to MAX6958, adds input support. Type of the chip can
> +  be autodetected via specific register read, and hence the features
> +  may be enabled in the driver at run-time, in case they are requested
> +  via Device Tree. A given hardware is simple and does not provide
> +  any additional pins, such as reset or enable.
> +
> +properties:
> +  compatible:
> +    const: maxim,max6959
> +
> +  reg:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg

To handle cases where less than 4 characters are wired
(based on hit,hd44780.yaml):

    display-width-chars:
      description: Width of the display, in character cells.
      minimum: 1
      maximum: 4
      default: 4

The rest LGTM, so
Reviewed-by: Geert Uytterhoeven <geert@...ux-m68k.org>

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68korg

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds