linux-kernel - Re: [PATCH 2/2] dt-bindings: gpio: Add support for PCF8574T.

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: <20250217151336.GA12410@pendragon.ideasonboard.com>
Date: Mon, 17 Feb 2025 17:13:36 +0200
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: gomba007@...il.com
Cc: Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH 2/2] dt-bindings: gpio: Add support for PCF8574T.

Hi Tóth,

Thank you for the patch.

On Mon, Feb 17, 2025 at 02:07:52PM +0100, Tóth János via B4 Relay wrote:
> From: Tóth János <gomba007@...il.com>
> 
> Add the necessary documentation for PCF8574T.
> 
> Signed-off-by: Tóth János <gomba007@...il.com>
> ---
>  Documentation/devicetree/bindings/gpio/nxp,pcf8575.yaml | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/gpio/nxp,pcf8575.yaml b/Documentation/devicetree/bindings/gpio/nxp,pcf8575.yaml
> index 3718103e966a..cbe4cf96e942 100644
> --- a/Documentation/devicetree/bindings/gpio/nxp,pcf8575.yaml
> +++ b/Documentation/devicetree/bindings/gpio/nxp,pcf8575.yaml
> @@ -34,6 +34,7 @@ properties:
>        - nxp,pca9675
>        - nxp,pcf8574
>        - nxp,pcf8574a
> +      - nxp,pcf8574t

Judging from patch 2/2, the PCF8574T is compatible with the PCF8574, the
only difference being the package. It makes no difference from a
software point of view. It seems you can simply use nxp,pcf8574 as a
compatible string in your device tree for the PCF8574T, and this patch
series isn't needed.

>        - nxp,pcf8575
>  
>    reg:

-- 
Regards,

Laurent Pinchart