linux-kernel - Re: [PATCH v3 1/2] iio: tsl2772: Use device-managed API

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Date:   Mon, 5 Aug 2019 16:04:10 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Chuhong Yuan <hslester96@...il.com>
Cc:     Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Brian Masney <masneyb@...tation.org>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/2] iio: tsl2772: Use device-managed API

On Wed, 31 Jul 2019 11:04:15 +0800
Chuhong Yuan <hslester96@...il.com> wrote:

> Use devm_() APIs to simplify the code.
> 
> Signed-off-by: Chuhong Yuan <hslester96@...il.com>
> ---
> Changes in v3:
>   - Split v2 into two patches.
> 
>  drivers/iio/light/tsl2772.c | 36 +++++++++++++++---------------------
>  1 file changed, 15 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/iio/light/tsl2772.c b/drivers/iio/light/tsl2772.c
> index 83cece921843..f1134f183be7 100644
> --- a/drivers/iio/light/tsl2772.c
> +++ b/drivers/iio/light/tsl2772.c
> @@ -860,6 +860,13 @@ static int tsl2772_chip_off(struct iio_dev *indio_dev)
>  	return tsl2772_write_control_reg(chip, 0x00);
>  }
>  
> +static void tsl2772_chip_off_action(void *data)
> +{
> +	struct iio_dev *indio_dev = data;
> +
> +	tsl2772_chip_off(indio_dev);
> +}
> +
>  /**
>   * tsl2772_invoke_change - power cycle the device to implement the user
>   *                         parameters
> @@ -1807,10 +1814,10 @@ static int tsl2772_probe(struct i2c_client *clientp,
>  		return PTR_ERR(chip->vdd_supply);
>  	}
>  
> -	ret = devm_add_action(&clientp->dev, tsl2772_disable_regulators_action,
> +	ret = devm_add_action_or_reset(&clientp->dev,
> +				tsl2772_disable_regulators_action,

Please fix that alignment in here.

Thanks,

Jonathan

>  			      chip);
>  	if (ret < 0) {
> -		tsl2772_disable_regulators_action(chip);
>  		dev_err(&clientp->dev, "Failed to setup regulator cleanup action %d\n",
>  			ret);
>  		return ret;
> @@ -1877,15 +1884,14 @@ static int tsl2772_probe(struct i2c_client *clientp,
>  	if (ret < 0)
>  		return ret;
>  
> -	ret = iio_device_register(indio_dev);
> -	if (ret) {
> -		tsl2772_chip_off(indio_dev);
> -		dev_err(&clientp->dev,
> -			"%s: iio registration failed\n", __func__);
> +	ret = devm_add_action_or_reset(&clientp->dev,
> +					tsl2772_chip_off_action,
> +					indio_dev);
> +
> +	if (ret < 0)
>  		return ret;
> -	}
>  
> -	return 0;
> +	return devm_iio_device_register(&clientp->dev, indio_dev);
>  }
>  
>  static int tsl2772_suspend(struct device *dev)
> @@ -1922,17 +1928,6 @@ static int tsl2772_resume(struct device *dev)
>  	return tsl2772_chip_on(indio_dev);
>  }
>  
> -static int tsl2772_remove(struct i2c_client *client)
> -{
> -	struct iio_dev *indio_dev = i2c_get_clientdata(client);
> -
> -	tsl2772_chip_off(indio_dev);
> -
> -	iio_device_unregister(indio_dev);
> -
> -	return 0;
> -}
> -
>  static const struct i2c_device_id tsl2772_idtable[] = {
>  	{ "tsl2571", tsl2571 },
>  	{ "tsl2671", tsl2671 },
> @@ -1979,7 +1974,6 @@ static struct i2c_driver tsl2772_driver = {
>  	},
>  	.id_table = tsl2772_idtable,
>  	.probe = tsl2772_probe,
> -	.remove = tsl2772_remove,
>  };
>  
>  module_i2c_driver(tsl2772_driver);