diff options
| author | Nikita Travkin <nikita@trvn.ru> | 2021-11-25 15:56:46 +0300 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2021-12-04 18:34:18 +0300 |
| commit | 4114835810aecec94b4163b8b1086dd953476391 (patch) | |
| tree | d7c2bf0ff9d7eaafe404008c4241799bcc12fa4e /drivers/iio | |
| parent | 2cc131ace0d2f47e5d8fcc8a2be12f5e3a20b1f0 (diff) | |
| download | linux-4114835810aecec94b4163b8b1086dd953476391.tar.xz | |
iio: ltr501: Export near level property for proximity sensor
Userspace tools like iio-sensor-proxy need to know the proximity level
that should be considered "near". This value is hardware-specific and
can be defined via the devicetree. Allow the driver to export the near
level.
Signed-off-by: Nikita Travkin <nikita@trvn.ru>
Link: https://lore.kernel.org/r/20211125125646.54831-2-nikita@trvn.ru
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/light/ltr501.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/iio/light/ltr501.c b/drivers/iio/light/ltr501.c index bab5b78f2e30..902b9c7a96a7 100644 --- a/drivers/iio/light/ltr501.c +++ b/drivers/iio/light/ltr501.c @@ -166,6 +166,7 @@ struct ltr501_data { struct regmap_field *reg_ps_rate; struct regmap_field *reg_als_prst; struct regmap_field *reg_ps_prst; + uint32_t near_level; }; static const struct ltr501_samp_table ltr501_als_samp_table[] = { @@ -525,6 +526,25 @@ static int ltr501_write_intr_prst(struct ltr501_data *data, return -EINVAL; } +static ssize_t ltr501_read_near_level(struct iio_dev *indio_dev, + uintptr_t priv, + const struct iio_chan_spec *chan, + char *buf) +{ + struct ltr501_data *data = iio_priv(indio_dev); + + return sprintf(buf, "%u\n", data->near_level); +} + +static const struct iio_chan_spec_ext_info ltr501_ext_info[] = { + { + .name = "nearlevel", + .shared = IIO_SEPARATE, + .read = ltr501_read_near_level, + }, + { /* sentinel */ } +}; + static const struct iio_event_spec ltr501_als_event_spec[] = { { .type = IIO_EV_TYPE_THRESH, @@ -609,6 +629,7 @@ static const struct iio_chan_spec ltr501_channels[] = { }, .event_spec = ltr501_pxs_event_spec, .num_event_specs = ARRAY_SIZE(ltr501_pxs_event_spec), + .ext_info = ltr501_ext_info, }, IIO_CHAN_SOFT_TIMESTAMP(3), }; @@ -1531,6 +1552,10 @@ static int ltr501_probe(struct i2c_client *client, if ((partid >> 4) != data->chip_info->partid) return -ENODEV; + if (device_property_read_u32(&client->dev, "proximity-near-level", + &data->near_level)) + data->near_level = 0; + indio_dev->info = data->chip_info->info; indio_dev->channels = data->chip_info->channels; indio_dev->num_channels = data->chip_info->no_channels; |