linux-kernel - Re: [PATCH RFC 6/7] staging: iio: impedance-analyzer: admv1013: Use devm_regulator_get_enable_get

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Message-ID: <20240328135003.3c200be3@jic23-huawei>
Date: Thu, 28 Mar 2024 13:50:03 +0000
From: Jonathan Cameron <jic23@...nel.org>
To: David Lechner <dlechner@...libre.com>
Cc: Jonathan Corbet <corbet@....net>, Liam Girdwood <lgirdwood@...il.com>,
 Mark Brown <broonie@...nel.org>, Jean Delvare <jdelvare@...e.com>, Guenter
 Roeck <linux@...ck-us.net>, Support Opensource
 <support.opensource@...semi.com>, Cosmin Tanislav
 <cosmin.tanislav@...log.com>, Lars-Peter Clausen <lars@...afoo.de>, Michael
 Hennerich <Michael.Hennerich@...log.com>, Antoniu Miclaus
 <antoniu.miclaus@...log.com>, Greg Kroah-Hartman
 <gregkh@...uxfoundation.org>, Dmitry Torokhov <dmitry.torokhov@...il.com>,
 linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-hwmon@...r.kernel.org, linux-iio@...r.kernel.org,
 linux-staging@...ts.linux.dev, linux-input@...r.kernel.org
Subject: Re: [PATCH RFC 6/7] staging: iio: impedance-analyzer: admv1013: Use
 devm_regulator_get_enable_get_voltage()

On Wed, 27 Mar 2024 18:18:55 -0500
David Lechner <dlechner@...libre.com> wrote:

> We can reduce boilerplate code by using
> devm_regulator_get_enable_get_voltage().
Wrong device in patch title.  I thought it odd we had a driver for same part
number in staging and out of it!.

Otherwise LGTM

Not sure how we'll merge this set assuming everyone agrees it's a good idea.
Immutable branch probably.  On off chance we don't do that, with the patch title
fixed.
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>


Jonathan

> 
> Signed-off-by: David Lechner <dlechner@...libre.com>
> ---
>  drivers/staging/iio/impedance-analyzer/ad5933.c | 24 +-----------------------
>  1 file changed, 1 insertion(+), 23 deletions(-)
> 
> diff --git a/drivers/staging/iio/impedance-analyzer/ad5933.c b/drivers/staging/iio/impedance-analyzer/ad5933.c
> index 9149d41fe65b..e4942833b793 100644
> --- a/drivers/staging/iio/impedance-analyzer/ad5933.c
> +++ b/drivers/staging/iio/impedance-analyzer/ad5933.c
> @@ -84,7 +84,6 @@
>  
>  struct ad5933_state {
>  	struct i2c_client		*client;
> -	struct regulator		*reg;
>  	struct clk			*mclk;
>  	struct delayed_work		work;
>  	struct mutex			lock; /* Protect sensor state */
> @@ -660,13 +659,6 @@ static void ad5933_work(struct work_struct *work)
>  	}
>  }
>  
> -static void ad5933_reg_disable(void *data)
> -{
> -	struct ad5933_state *st = data;
> -
> -	regulator_disable(st->reg);
> -}
> -
>  static int ad5933_probe(struct i2c_client *client)
>  {
>  	const struct i2c_device_id *id = i2c_client_get_device_id(client);
> @@ -685,21 +677,7 @@ static int ad5933_probe(struct i2c_client *client)
>  
>  	mutex_init(&st->lock);
>  
> -	st->reg = devm_regulator_get(&client->dev, "vdd");
> -	if (IS_ERR(st->reg))
> -		return PTR_ERR(st->reg);
> -
> -	ret = regulator_enable(st->reg);
> -	if (ret) {
> -		dev_err(&client->dev, "Failed to enable specified VDD supply\n");
> -		return ret;
> -	}
> -
> -	ret = devm_add_action_or_reset(&client->dev, ad5933_reg_disable, st);
> -	if (ret)
> -		return ret;
> -
> -	ret = regulator_get_voltage(st->reg);
> +	ret = devm_regulator_get_enable_get_voltage(&client->dev, "vdd");
>  	if (ret < 0)
>  		return ret;
>  
>