linux-kernel - Re: [PATCH v3 1/2] iio: pressure: ms5611: Add IIO_CHAN_INFO

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Date:	Sat, 6 Feb 2016 18:18:17 +0000
From:	Jonathan Cameron <jic23@...nel.org>
To:	Daniel Baluta <daniel.baluta@...el.com>
Cc:	knaack.h@....de, lars@...afoo.de, pmeerw@...erw.net,
	linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org,
	lucas.demarchi@...el.com
Subject: Re: [PATCH v3 1/2] iio: pressure: ms5611: Add IIO_CHAN_INFO_SCALE to
 mask

On 03/02/16 16:50, Daniel Baluta wrote:
> This allows data exported via buffer interface to be converted
> to standard units in userspace.
> 
> Signed-off-by: Daniel Baluta <daniel.baluta@...el.com>
Applied.
> ---
>  drivers/iio/pressure/ms5611_core.c | 18 ++++++++++++++++--
>  1 file changed, 16 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/iio/pressure/ms5611_core.c b/drivers/iio/pressure/ms5611_core.c
> index 2f3d9b4..6cf0e55 100644
> --- a/drivers/iio/pressure/ms5611_core.c
> +++ b/drivers/iio/pressure/ms5611_core.c
> @@ -201,6 +201,18 @@ static int ms5611_read_raw(struct iio_dev *indio_dev,
>  		default:
>  			return -EINVAL;
>  		}
> +	case IIO_CHAN_INFO_SCALE:
> +		switch (chan->type) {
> +		case IIO_TEMP:
> +			*val = 10;
> +			return IIO_VAL_INT;
> +		case IIO_PRESSURE:
> +			*val = 0;
> +			*val2 = 1000;
> +			return IIO_VAL_INT_PLUS_MICRO;
> +		default:
> +			return -EINVAL;
> +		}
>  	}
>  
>  	return -EINVAL;
> @@ -218,11 +230,13 @@ static struct ms5611_chip_info chip_info_tbl[] = {
>  static const struct iio_chan_spec ms5611_channels[] = {
>  	{
>  		.type = IIO_PRESSURE,
> -		.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
> +		.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
> +			BIT(IIO_CHAN_INFO_SCALE),
>  	},
>  	{
>  		.type = IIO_TEMP,
> -		.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
> +		.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
> +			BIT(IIO_CHAN_INFO_SCALE),
>  	}
>  };
>  
>