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iio: proximity: stk3310: Export near level property for proximity sensor

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This makes the value from which an object should be considered "near"
available to userspace. This hardware-dependent value should be set
in the device-tree.

Signed-off-by: Arnaud Ferraris <arnaud.ferraris@collabora.com>
Link: https://lore.kernel.org/r/20220420112540.91907-3-arnaud.ferraris@collabora.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Arnaud Ferraris 2022-04-20 13:25:40 +02:00 • committed by Jonathan Cameron
parent b71b538b47
commit d6ecb01583
1 changed files with 25 additions and 0 deletions
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25
drivers/iio/light/stk3310.c
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@ -106,6 +106,7 @@ struct stk3310_data {
struct mutex lock;
bool als_enabled;
bool ps_enabled;
uint32_t ps_near_level;
u64 timestamp;
struct regmap *regmap;
struct regmap_field *reg_state;
@ -135,6 +136,25 @@ static const struct iio_event_spec stk3310_events[] = {
},
};
static ssize_t stk3310_read_near_level(struct iio_dev *indio_dev,
uintptr_t priv,
const struct iio_chan_spec *chan,
char *buf)
{
struct stk3310_data *data = iio_priv(indio_dev);
return sprintf(buf, "%u\n", data->ps_near_level);
}
static const struct iio_chan_spec_ext_info stk3310_ext_info[] = {
{
.name = "nearlevel",
.shared = IIO_SEPARATE,
.read = stk3310_read_near_level,
},
{ /* sentinel */ }
};
static const struct iio_chan_spec stk3310_channels[] = {
{
.type = IIO_LIGHT,
@ -151,6 +171,7 @@ static const struct iio_chan_spec stk3310_channels[] = {
BIT(IIO_CHAN_INFO_INT_TIME),
.event_spec = stk3310_events,
.num_event_specs = ARRAY_SIZE(stk3310_events),
.ext_info = stk3310_ext_info,
}
};
@ -581,6 +602,10 @@ static int stk3310_probe(struct i2c_client *client,
data = iio_priv(indio_dev);
data->client = client;
i2c_set_clientdata(client, indio_dev);
device_property_read_u32(&client->dev, "proximity-near-level",
&data->ps_near_level);
mutex_init(&data->lock);
ret = stk3310_regmap_init(data);