Commit dc3ebfca authored by Matt Ranostay's avatar Matt Ranostay Committed by Jonathan Cameron
Browse files

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



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

Signed-off-by: default avatarMatt Ranostay <matt.ranostay@konsulko.com>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent d9479966

drivers/iio/chemical/atlas-ezo-sensor.c

+36 −1
Original line number Diff line number Diff line
@@ -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);