Re: [PATCH v3 3/3] staging: iio: ad7780: remove unnecessary stashed voltage value

[Ardelean, Alexandru]

On Thu, 2018-11-01 at 11:43 -0300, Renato Lui Geh wrote:
> This patch removes the unnecessary field int_vref_mv in ad7780_state
> referring to the device's voltage.
> 
> Signed-off-by: Renato Lui Geh <renatogeh@xxxxxxxxx>
> ---
> Changes in v3:
> 	- removed unnecessary int_vref_mv from ad7780_state
> 
>  drivers/staging/iio/adc/ad7780.c | 5 +----
>  1 file changed, 1 insertion(+), 4 deletions(-)
> 
> diff --git a/drivers/staging/iio/adc/ad7780.c
> b/drivers/staging/iio/adc/ad7780.c
> index f2a11e9424cd..f250370efcf7 100644
> --- a/drivers/staging/iio/adc/ad7780.c
> +++ b/drivers/staging/iio/adc/ad7780.c
> @@ -42,7 +42,6 @@ struct ad7780_state {
>  	struct regulator		*reg;
>  	struct gpio_desc		*powerdown_gpio;
>  	unsigned int	gain;
> -	u16				int_vref_mv;
>  
>  	struct ad_sigma_delta sd;
>  };
> @@ -190,9 +189,7 @@ static int ad7780_probe(struct spi_device *spi)
>  	st->chip_info =
>  		&ad7780_chip_info_tbl[spi_get_device_id(spi)->driver_data];
>  
> -	if (voltage_uv)
> -		st->int_vref_mv = voltage_uv / 1000;
> -	else
> +	if (!voltage_uv)
>  		dev_warn(&spi->dev, "Reference voltage unspecified\n");

I think you could remove this altogether, and also remove the entire
`voltage_uv = regulator_get_voltage(st->reg);` assignment.

It doesn't make much sense to read the voltage here, since it won't be used
in the probe part anymore.

>  
>  	spi_set_drvdata(spi, indio_dev);