linux-kernel - RE: [PATCH] gpio: gpio-da9055: remove platform_set

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Message-ID: <PR3PR10MB4142D5A98C0B0E4C08CBAE1C80299@PR3PR10MB4142.EURPRD10.PROD.OUTLOOK.COM>
Date:   Fri, 21 May 2021 08:45:47 +0000
From:   Adam Thomson <Adam.Thomson.Opensource@...semi.com>
To:     Alexandru Ardelean <aardelean@...iqon.com>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     "linus.walleij@...aro.org" <linus.walleij@...aro.org>,
        "bgolaszewski@...libre.com" <bgolaszewski@...libre.com>,
        Support Opensource <Support.Opensource@...semi.com>
Subject: RE: [PATCH] gpio: gpio-da9055: remove platform_set_drvdata() +
 cleanup probe

On 14 May 2021 10:24, Alexandru Ardelean wrote:

> The platform_set_drvdata() call is only useful if we need to retrieve back
> the private information.
> Since the driver doesn't do that, it's not useful to have it.
> 
> If this is removed, we can also just do a direct return on
> devm_gpiochip_add_data(). We don't need to print that this call failed as
> there are other ways to log/see this during probe.
> 
> Signed-off-by: Alexandru Ardelean <aardelean@...iqon.com>

Acked-by: Adam Thomson <Adam.Thomson.Opensource@...semi.com>

> ---
>  drivers/gpio/gpio-da9055.c | 11 +----------
>  1 file changed, 1 insertion(+), 10 deletions(-)
> 
> diff --git a/drivers/gpio/gpio-da9055.c b/drivers/gpio/gpio-da9055.c
> index 6ad0c37b862e..49446a030f10 100644
> --- a/drivers/gpio/gpio-da9055.c
> +++ b/drivers/gpio/gpio-da9055.c
> @@ -133,7 +133,6 @@ static int da9055_gpio_probe(struct platform_device
> *pdev)
>  {
>  	struct da9055_gpio *gpio;
>  	struct da9055_pdata *pdata;
> -	int ret;
> 
>  	gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
>  	if (!gpio)
> @@ -146,15 +145,7 @@ static int da9055_gpio_probe(struct platform_device
> *pdev)
>  	if (pdata && pdata->gpio_base)
>  		gpio->gp.base = pdata->gpio_base;
> 
> -	ret = devm_gpiochip_add_data(&pdev->dev, &gpio->gp, gpio);
> -	if (ret < 0) {
> -		dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
> -		return ret;
> -	}
> -
> -	platform_set_drvdata(pdev, gpio);
> -
> -	return 0;
> +	return devm_gpiochip_add_data(&pdev->dev, &gpio->gp, gpio);
>  }
> 
>  static struct platform_driver da9055_gpio_driver = {
> --
> 2.31.1