linux-kernel - Re: [PATCH v6 5/6] can: mcp251xfd: add gpio functionality

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Message-ID: <CAMRc=MfMO-+SSrTY-XQLtsDnxpj_E3TdTJ43ZxCUi-iDrvnc2w@mail.gmail.com>
Date: Wed, 1 Oct 2025 15:52:56 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Viken Dadhaniya <viken.dadhaniya@....qualcomm.com>
Cc: mkl@...gutronix.de, mani@...nel.org, thomas.kopp@...rochip.com, 
	mailhol.vincent@...adoo.fr, robh@...nel.org, krzk+dt@...nel.org, 
	conor+dt@...nel.org, linus.walleij@...aro.org, linux-can@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	mukesh.savaliya@....qualcomm.com, anup.kulkarni@....qualcomm.com, 
	Gregor Herburger <gregor.herburger@...tq-group.com>, 
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [PATCH v6 5/6] can: mcp251xfd: add gpio functionality

On Wed, Oct 1, 2025 at 11:10 AM Viken Dadhaniya
<viken.dadhaniya@....qualcomm.com> wrote:
> +
> +       if (!device_property_present(&priv->spi->dev, "gpio-controller"))
> +               return 0;
> +

Hi! I didn't notice this before you're returning 0 here, meaning the
device will be attached to the driver even though it doesn't do
anything. It would make more sense to return -ENODEV.

Bart