Commit 41148358 authored by Nikita Travkin's avatar Nikita Travkin Committed by Jonathan Cameron
Browse files

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: default avatarNikita Travkin <nikita@trvn.ru>
Link: https://lore.kernel.org/r/20211125125646.54831-2-nikita@trvn.ru


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 2cc131ac

drivers/iio/light/ltr501.c

+25 −0
Original line number Diff line number Diff line
@@ -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;