linux-kernel - Re: [PATCH 3/5] iio: adc: axp288_adc: convert probe to full device-managed

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Message-ID: <1e26dd27-475c-7815-9a9d-240546fa9088@redhat.com>
Date:   Fri, 3 Sep 2021 10:00:04 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     Alexandru Ardelean <aardelean@...iqon.com>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org
Cc:     jic23@...nel.org, wens@...e.org, andriy.shevchenko@...ux.intel.com
Subject: Re: [PATCH 3/5] iio: adc: axp288_adc: convert probe to full
 device-managed

Hi,

On 9/3/21 9:29 AM, Alexandru Ardelean wrote:
> This change converts the probe of this driver to use device-managed
> functions only, which means that the remove hook can be removed.
> The remove hook has only 2 calls to iio_device_unregister() and
> iio_map_array_unregister(). Both these can now be done via devm register
> functions, now that there's also a devm_iio_map_array_register() function.
> 
> The platform_set_drvdata() can also be removed now.
> 
> This change also removes the error print for when the iio_device_register()
> call fails. This isn't required now.
> > Signed-off-by: Alexandru Ardelean <aardelean@...iqon.com>

Thanks, patch looks good to me:

Reviewed-by: Hans de Goede <hdegoede@...hat.com>

Regards,

Hans



> ---
>  drivers/iio/adc/axp288_adc.c | 28 ++++------------------------
>  1 file changed, 4 insertions(+), 24 deletions(-)
> 
> diff --git a/drivers/iio/adc/axp288_adc.c b/drivers/iio/adc/axp288_adc.c
> index 5f5e8b39e4d2..a4b8be5b8f88 100644
> --- a/drivers/iio/adc/axp288_adc.c
> +++ b/drivers/iio/adc/axp288_adc.c
> @@ -259,7 +259,7 @@ static int axp288_adc_probe(struct platform_device *pdev)
>  	info->irq = platform_get_irq(pdev, 0);
>  	if (info->irq < 0)
>  		return info->irq;
> -	platform_set_drvdata(pdev, indio_dev);
> +
>  	info->regmap = axp20x->regmap;
>  	/*
>  	 * Set ADC to enabled state at all time, including system suspend.
> @@ -276,31 +276,12 @@ static int axp288_adc_probe(struct platform_device *pdev)
>  	indio_dev->num_channels = ARRAY_SIZE(axp288_adc_channels);
>  	indio_dev->info = &axp288_adc_iio_info;
>  	indio_dev->modes = INDIO_DIRECT_MODE;
> -	ret = iio_map_array_register(indio_dev, axp288_adc_default_maps);
> +
> +	ret = devm_iio_map_array_register(&pdev->dev, indio_dev, axp288_adc_default_maps);
>  	if (ret < 0)
>  		return ret;
>  
> -	ret = iio_device_register(indio_dev);
> -	if (ret < 0) {
> -		dev_err(&pdev->dev, "unable to register iio device\n");
> -		goto err_array_unregister;
> -	}
> -	return 0;
> -
> -err_array_unregister:
> -	iio_map_array_unregister(indio_dev);
> -
> -	return ret;
> -}
> -
> -static int axp288_adc_remove(struct platform_device *pdev)
> -{
> -	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
> -
> -	iio_device_unregister(indio_dev);
> -	iio_map_array_unregister(indio_dev);
> -
> -	return 0;
> +	return devm_iio_device_register(&pdev->dev, indio_dev);
>  }
>  
>  static const struct platform_device_id axp288_adc_id_table[] = {
> @@ -310,7 +291,6 @@ static const struct platform_device_id axp288_adc_id_table[] = {
>  
>  static struct platform_driver axp288_adc_driver = {
>  	.probe = axp288_adc_probe,
> -	.remove = axp288_adc_remove,
>  	.id_table = axp288_adc_id_table,
>  	.driver = {
>  		.name = "axp288_adc",
>