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iio: chemical: atlas-ezo-sensor: add humidity sensor support

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Add support for atlas,hum-ezo / humidity sensor which with scaling
provides respective data in millipercent

Signed-off-by: Matt Ranostay <matt.ranostay@konsulko.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Matt Ranostay 2020-08-17 03:50:52 +03:00 committed by Jonathan Cameron
parent d947996687
commit dc3ebfcaa5
1 changed files with 36 additions and 1 deletions
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37
drivers/iio/chemical/atlas-ezo-sensor.c
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@ -17,10 +17,12 @@
#define ATLAS_EZO_DRV_NAME "atlas-ezo-sensor"
#define ATLAS_INT_TIME_IN_MS 950
#define ATLAS_INT_HUM_TIME_IN_MS 350
enum {
ATLAS_CO2_EZO,
ATLAS_O2_EZO,
ATLAS_HUM_EZO,
};
struct atlas_ezo_device {
@ -63,6 +65,21 @@ static const struct iio_chan_spec atlas_o2_ezo_channels[] = {
ATLAS_CONCENTRATION_CHANNEL(IIO_MOD_O2),
};
static const struct iio_chan_spec atlas_hum_ezo_channels[] = {
{
.type = IIO_HUMIDITYRELATIVE,
.info_mask_separate =
BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
.scan_index = 0,
.scan_type = {
.sign = 'u',
.realbits = 32,
.storagebits = 32,
.endianness = IIO_CPU,
},
},
};
static struct atlas_ezo_device atlas_ezo_devices[] = {
[ATLAS_CO2_EZO] = {
.channels = atlas_co2_ezo_channels,
@ -73,7 +90,12 @@ static struct atlas_ezo_device atlas_ezo_devices[] = {
.channels = atlas_o2_ezo_channels,
.num_channels = 1,
.delay = ATLAS_INT_TIME_IN_MS,
}
},
[ATLAS_HUM_EZO] = {
.channels = atlas_hum_ezo_channels,
.num_channels = 1,
.delay = ATLAS_INT_HUM_TIME_IN_MS,
},
};
static void atlas_ezo_sanitize(char *buf)
@ -131,6 +153,17 @@ static int atlas_ezo_read_raw(struct iio_dev *indio_dev,
return ret ? ret : IIO_VAL_INT;
}
case IIO_CHAN_INFO_SCALE:
switch (chan->type) {
case IIO_HUMIDITYRELATIVE:
*val = 10;
return IIO_VAL_INT;
case IIO_CONCENTRATION:
break;
default:
return -EINVAL;
}
/* IIO_CONCENTRATION modifiers */
switch (chan->channel2) {
case IIO_MOD_CO2:
*val = 0;
@ -153,6 +186,7 @@ static const struct iio_info atlas_info = {
static const struct i2c_device_id atlas_ezo_id[] = {
{ "atlas-co2-ezo", ATLAS_CO2_EZO },
{ "atlas-o2-ezo", ATLAS_O2_EZO },
{ "atlas-hum-ezo", ATLAS_HUM_EZO },
{}
};
MODULE_DEVICE_TABLE(i2c, atlas_ezo_id);
@ -160,6 +194,7 @@ MODULE_DEVICE_TABLE(i2c, atlas_ezo_id);
static const struct of_device_id atlas_ezo_dt_ids[] = {
{ .compatible = "atlas,co2-ezo", .data = (void *)ATLAS_CO2_EZO, },
{ .compatible = "atlas,o2-ezo", .data = (void *)ATLAS_O2_EZO, },
{ .compatible = "atlas,hum-ezo", .data = (void *)ATLAS_HUM_EZO, },
{}
};
MODULE_DEVICE_TABLE(of, atlas_ezo_dt_ids);