linux-kernel - Re: [PATCH 1/3] staging: iio: ad5933: change regulator binging for vref

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Date:   Sun, 16 Dec 2018 12:13:36 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Marcelo Schmitt <marcelo.schmitt1@...il.com>
Cc:     lars@...afoo.de, Michael.Hennerich@...log.com, knaack.h@....de,
        pmeerw@...erw.net, gregkh@...uxfoundation.org,
        stefan.popa@...log.com, alexandru.Ardelean@...log.com,
        linux-iio@...r.kernel.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org, kernel-usp@...glegroups.com
Subject: Re: [PATCH 1/3] staging: iio: ad5933: change regulator binging for
 vref

On Sat, 8 Dec 2018 16:19:08 -0200
Marcelo Schmitt <marcelo.schmitt1@...il.com> wrote:

> Set a single voltage regulator for all voltage references.
> Remove voltage reference value from default platafrom data struct.
> 
> Signed-off-by: Marcelo Schmitt <marcelo.schmitt1@...il.com>
> Signed-off-by: Gabriel Capella <gabriel@...ella.pro>
> Co-Developed-by: Gabriel Capella <gabriel@...ella.pro>
Applied to the togreg branch of iio.git and pushed out as testing
for the autobuilders to play with it.

Thanks,

Jonathan

> ---
>  drivers/staging/iio/impedance-analyzer/ad5933.c | 14 ++++++--------
>  1 file changed, 6 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/staging/iio/impedance-analyzer/ad5933.c b/drivers/staging/iio/impedance-analyzer/ad5933.c
> index 9e52384f5370..730bc397a26b 100644
> --- a/drivers/staging/iio/impedance-analyzer/ad5933.c
> +++ b/drivers/staging/iio/impedance-analyzer/ad5933.c
> @@ -91,7 +91,6 @@
>  
>  struct ad5933_platform_data {
>  	unsigned long			ext_clk_hz;
> -	unsigned short			vref_mv;
>  };
>  
>  struct ad5933_state {
> @@ -113,7 +112,6 @@ struct ad5933_state {
>  };
>  
>  static struct ad5933_platform_data ad5933_default_pdata  = {
> -	.vref_mv = 3300,
>  };
>  
>  #define AD5933_CHANNEL(_type, _extend_name, _info_mask_separate, _address, \
> @@ -691,7 +689,7 @@ static void ad5933_work(struct work_struct *work)
>  static int ad5933_probe(struct i2c_client *client,
>  			const struct i2c_device_id *id)
>  {
> -	int ret, voltage_uv = 0;
> +	int ret;
>  	struct ad5933_platform_data *pdata = dev_get_platdata(&client->dev);
>  	struct ad5933_state *st;
>  	struct iio_dev *indio_dev;
> @@ -718,12 +716,12 @@ static int ad5933_probe(struct i2c_client *client,
>  		dev_err(&client->dev, "Failed to enable specified VDD supply\n");
>  		return ret;
>  	}
> -	voltage_uv = regulator_get_voltage(st->reg);
> +	ret = regulator_get_voltage(st->reg);
> +
> +	if (ret < 0)
> +		goto error_disable_reg;
>  
> -	if (voltage_uv)
> -		st->vref_mv = voltage_uv / 1000;
> -	else
> -		st->vref_mv = pdata->vref_mv;
> +	st->vref_mv = ret / 1000;
>  
>  	if (pdata->ext_clk_hz) {
>  		st->mclk_hz = pdata->ext_clk_hz;