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SubjectRe: [PATCH 2/3] staging: iio: tsl2x7x: migrate in_illuminance0_integration_time sysfs attribute to iio_chan_spec
On Fri, 29 Sep 2017 21:09:20 -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>

One comment inline, but a general observation rather than about this
patch so applied to the togreg branch of iio.git and pushed out as
testing.

Thanks,

Jonathan
> ---
> Changes since v1 (Jul 9 2017):
> - Use MIN_ITIME instead of hardcoded 3 in tsl2x7x_write_raw()
>
> drivers/staging/iio/light/tsl2x7x.c | 65 ++++++++++---------------------------
> 1 file changed, 17 insertions(+), 48 deletions(-)
>
> diff --git a/drivers/staging/iio/light/tsl2x7x.c b/drivers/staging/iio/light/tsl2x7x.c
> index e340ea624e5c..e6a71f5fc9cb 100644
> --- a/drivers/staging/iio/light/tsl2x7x.c
> +++ b/drivers/staging/iio/light/tsl2x7x.c
> @@ -898,45 +898,6 @@ 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->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->settings.als_time = TSL2X7X_MAX_TIMER_CNT - (u8)result.fract;
> -
> - dev_info(&chip->client->dev, "%s: als time = %d",
> - __func__, chip->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");
>
> @@ -1377,7 +1338,11 @@ static int tsl2x7x_read_raw(struct iio_dev *indio_dev,
> *val = chip->settings.als_gain_trim;
> ret = IIO_VAL_INT;
> break;
> -
> + case IIO_CHAN_INFO_INT_TIME:
> + *val = (TSL2X7X_MAX_TIMER_CNT - chip->settings.als_time) + 1;
> + *val2 = ((*val * TSL2X7X_MIN_ITIME) % 1000) / 1000;
> + ret = IIO_VAL_INT_PLUS_MICRO;
> + break;
> default:
> ret = -EINVAL;
> }
> @@ -1453,7 +1418,13 @@ static int tsl2x7x_write_raw(struct iio_dev *indio_dev,
> case IIO_CHAN_INFO_CALIBBIAS:
> chip->settings.als_gain_trim = val;
> break;
> + case IIO_CHAN_INFO_INT_TIME:
> + chip->settings.als_time =
> + TSL2X7X_MAX_TIMER_CNT - (val2 / TSL2X7X_MIN_ITIME);
>
> + dev_info(&chip->client->dev, "%s: als time = %d",
> + __func__, chip->settings.als_time);
> + break;

I'm not sure this dev_info is terribly useful for anything - however
not an issue with this patch as you have simply moved it..

> default:
> return -EINVAL;
> }
> @@ -1465,8 +1436,6 @@ 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);
> @@ -1546,7 +1515,6 @@ 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,
> @@ -1561,7 +1529,6 @@ 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,
> @@ -1578,7 +1545,6 @@ 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,
> @@ -1711,7 +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,
> @@ -1750,7 +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,
> @@ -1798,7 +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,

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