Re: [PATCH v2 8/9] staging: iio: tsl2x7x: migrate in_illuminance0_integration_time sysfs attribute to iio_chan_spec

[Jonathan Cameron <jic23@kernel.org>]

On Thu,  6 Jul 2017 18:56:25 -0400
Brian Masney <masneyb@onstation.org> wrote:

> The driver explicitly creates the in_illuminance0_integration_time sysfs
> attribute outside the IIO core. This attribute is available in the IIO
> core so this patches migrates the attribute to be created by
> the iio_chan_spec.
> 
> Signed-off-by: Brian Masney <masneyb@onstation.org>
> ---
>  drivers/staging/iio/light/tsl2x7x.c | 68 +++++++++++--------------------------
>  1 file changed, 19 insertions(+), 49 deletions(-)
> 
> diff --git a/drivers/staging/iio/light/tsl2x7x.c b/drivers/staging/iio/light/tsl2x7x.c
> index c38bd64..033468d 100644
> --- a/drivers/staging/iio/light/tsl2x7x.c
> +++ b/drivers/staging/iio/light/tsl2x7x.c
> @@ -905,46 +905,6 @@ static ssize_t in_proximity0_calibscale_available_show(struct device *dev,
>  		return snprintf(buf, PAGE_SIZE, "%s\n", "1 2 4 8");
>  }
>  
> -static ssize_t in_illuminance0_integration_time_show(struct device *dev,
> -				     struct device_attribute *attr,
> -				     char *buf)
> -{
> -	struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
> -	int y, z;
> -
> -	y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
> -	z = y * TSL2X7X_MIN_ITIME;
> -	y /= 1000;
> -	z %= 1000;
> -
> -	return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
> -}
> -
> -static ssize_t in_illuminance0_integration_time_store(struct device *dev,
> -				      struct device_attribute *attr,
> -				      const char *buf, size_t len)
> -{
> -	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
> -	struct tsl2X7X_chip *chip = iio_priv(indio_dev);
> -	struct tsl2x7x_parse_result result;
> -	int ret;
> -
> -	ret = iio_str_to_fixpoint(buf, 100, &result.integer, &result.fract);
> -	if (ret)
> -		return ret;
> -
> -	result.fract /= 3;
> -	chip->tsl2x7x_settings.als_time =
> -			TSL2X7X_MAX_TIMER_CNT - (u8)result.fract;
> -
> -	dev_info(&chip->client->dev, "%s: als time = %d",
> -		 __func__, chip->tsl2x7x_settings.als_time);
> -
> -	tsl2x7x_invoke_change(indio_dev);
> -
> -	return IIO_VAL_INT_PLUS_MICRO;
> -}
> -
>  static IIO_CONST_ATTR(in_illuminance0_integration_time_available,
>  		".00272 - .696");
>  
> @@ -1369,7 +1329,13 @@ static int tsl2x7x_read_raw(struct iio_dev *indio_dev,
>  		*val = chip->tsl2x7x_settings.als_gain_trim;
>  		ret = IIO_VAL_INT;
>  		break;
> -
> +	case IIO_CHAN_INFO_INT_TIME:
> +		*val = (TSL2X7X_MAX_TIMER_CNT - chip->tsl2x7x_settings.als_time)
> +			+ 1;
> +		*val2 = (*val * TSL2X7X_MIN_ITIME) % 1000;
> +		*val /= 1000;
> +		ret = IIO_VAL_INT_PLUS_MICRO;
> +		break;
>  	default:
>  		ret = -EINVAL;
>  	}
> @@ -1445,7 +1411,13 @@ static int tsl2x7x_write_raw(struct iio_dev *indio_dev,
>  	case IIO_CHAN_INFO_CALIBBIAS:
>  		chip->tsl2x7x_settings.als_gain_trim = val;
>  		break;
> +	case IIO_CHAN_INFO_INT_TIME:
> +		chip->tsl2x7x_settings.als_time =
> +			TSL2X7X_MAX_TIMER_CNT - (val2 / 3);
Is that 3 the same one represented by MIN_ITME?

Looks like it so would be easier to review if it was using the
constant.

Thanks,

Jonathan
>  
> +		dev_info(&chip->client->dev, "%s: als time = %d",
> +			 __func__, chip->tsl2x7x_settings.als_time);
> +		break;
>  	default:
>  		return -EINVAL;
>  	}
> @@ -1459,8 +1431,6 @@ static DEVICE_ATTR_RO(in_proximity0_calibscale_available);
>  
>  static DEVICE_ATTR_RO(in_illuminance0_calibscale_available);
>  
> -static DEVICE_ATTR_RW(in_illuminance0_integration_time);
> -
>  static DEVICE_ATTR_RW(in_illuminance0_target_input);
>  
>  static DEVICE_ATTR_WO(in_illuminance0_calibrate);
> @@ -1540,7 +1510,6 @@ static irqreturn_t tsl2x7x_event_handler(int irq, void *private)
>  
>  static struct attribute *tsl2x7x_ALS_device_attrs[] = {
>  	&dev_attr_in_illuminance0_calibscale_available.attr,
> -	&dev_attr_in_illuminance0_integration_time.attr,
>  	&iio_const_attr_in_illuminance0_integration_time_available.dev_attr.attr,
>  	&dev_attr_in_illuminance0_target_input.attr,
>  	&dev_attr_in_illuminance0_calibrate.attr,
> @@ -1555,7 +1524,6 @@ static struct attribute *tsl2x7x_PRX_device_attrs[] = {
>  
>  static struct attribute *tsl2x7x_ALSPRX_device_attrs[] = {
>  	&dev_attr_in_illuminance0_calibscale_available.attr,
> -	&dev_attr_in_illuminance0_integration_time.attr,
>  	&iio_const_attr_in_illuminance0_integration_time_available.dev_attr.attr,
>  	&dev_attr_in_illuminance0_target_input.attr,
>  	&dev_attr_in_illuminance0_calibrate.attr,
> @@ -1572,7 +1540,6 @@ static struct attribute *tsl2x7x_PRX2_device_attrs[] = {
>  
>  static struct attribute *tsl2x7x_ALSPRX2_device_attrs[] = {
>  	&dev_attr_in_illuminance0_calibscale_available.attr,
> -	&dev_attr_in_illuminance0_integration_time.attr,
>  	&iio_const_attr_in_illuminance0_integration_time_available.dev_attr.attr,
>  	&dev_attr_in_illuminance0_target_input.attr,
>  	&dev_attr_in_illuminance0_calibrate.attr,
> @@ -1710,7 +1677,8 @@ static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = {
>  			.type = IIO_LIGHT,
>  			.indexed = 1,
>  			.channel = 0,
> -			.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
> +			.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
> +					      BIT(IIO_CHAN_INFO_INT_TIME),
>  			}, {
>  			.type = IIO_INTENSITY,
>  			.indexed = 1,
> @@ -1749,7 +1717,8 @@ static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = {
>  			.type = IIO_LIGHT,
>  			.indexed = 1,
>  			.channel = 0,
> -			.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED)
> +			.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
> +					      BIT(IIO_CHAN_INFO_INT_TIME),
>  			}, {
>  			.type = IIO_INTENSITY,
>  			.indexed = 1,
> @@ -1797,7 +1766,8 @@ static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = {
>  			.type = IIO_LIGHT,
>  			.indexed = 1,
>  			.channel = 0,
> -			.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
> +			.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
> +					      BIT(IIO_CHAN_INFO_INT_TIME),
>  			}, {
>  			.type = IIO_INTENSITY,
>  			.indexed = 1,