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iio: ltr501: Export near level property for proximity sensor

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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>
This commit is contained in:
Nikita Travkin 2021-11-25 17:56:46 +05:00 committed by Jonathan Cameron
parent 2cc131ace0
commit 4114835810
1 changed files with 25 additions and 0 deletions
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25
drivers/iio/light/ltr501.c
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@ -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;