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iio: chemical: atlas-sensor: add DO-SM module support

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Atlas Scientific DO-SM OEM sensor reads disolved oxygen in
a solution. This is reported back as mg/L which maps directly
to ppm and so the IIO_CONCENTRATION channel type can be used.

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 2020-02-17 19:42:38 -08:00 committed by Jonathan Cameron
parent d4578dc051
commit a751b8e480
1 changed files with 60 additions and 4 deletions
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64
drivers/iio/chemical/atlas-sensor.c
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@ -48,6 +48,11 @@
#define ATLAS_REG_EC_CALIB_STATUS_LOW BIT(2)
#define ATLAS_REG_EC_CALIB_STATUS_HIGH BIT(3)
#define ATLAS_REG_DO_CALIB_STATUS 0x09
#define ATLAS_REG_DO_CALIB_STATUS_MASK 0x03
#define ATLAS_REG_DO_CALIB_STATUS_PRESSURE BIT(0)
#define ATLAS_REG_DO_CALIB_STATUS_DO BIT(1)
#define ATLAS_REG_PH_TEMP_DATA 0x0e
#define ATLAS_REG_PH_DATA 0x16
@ -60,14 +65,19 @@
#define ATLAS_REG_ORP_CALIB_STATUS 0x0d
#define ATLAS_REG_ORP_DATA 0x0e
#define ATLAS_REG_DO_TEMP_DATA 0x12
#define ATLAS_REG_DO_DATA 0x22
#define ATLAS_PH_INT_TIME_IN_MS 450
#define ATLAS_EC_INT_TIME_IN_MS 650
#define ATLAS_ORP_INT_TIME_IN_MS 450
#define ATLAS_DO_INT_TIME_IN_MS 450
enum {
ATLAS_PH_SM,
ATLAS_EC_SM,
ATLAS_ORP_SM,
ATLAS_DO_SM,
};
struct atlas_data {
@ -122,7 +132,7 @@ static const struct iio_chan_spec atlas_ph_channels[] = {
},
};
#define ATLAS_EC_CHANNEL(_idx, _addr) \
#define ATLAS_CONCENTRATION_CHANNEL(_idx, _addr) \
{\
.type = IIO_CONCENTRATION, \
.indexed = 1, \
@ -153,8 +163,8 @@ static const struct iio_chan_spec atlas_ec_channels[] = {
.endianness = IIO_BE,
},
},
ATLAS_EC_CHANNEL(0, ATLAS_REG_TDS_DATA),
ATLAS_EC_CHANNEL(1, ATLAS_REG_PSS_DATA),
ATLAS_CONCENTRATION_CHANNEL(0, ATLAS_REG_TDS_DATA),
ATLAS_CONCENTRATION_CHANNEL(1, ATLAS_REG_PSS_DATA),
IIO_CHAN_SOFT_TIMESTAMP(3),
{
.type = IIO_TEMP,
@ -183,6 +193,19 @@ static const struct iio_chan_spec atlas_orp_channels[] = {
IIO_CHAN_SOFT_TIMESTAMP(1),
};
static const struct iio_chan_spec atlas_do_channels[] = {
ATLAS_CONCENTRATION_CHANNEL(0, ATLAS_REG_DO_DATA),
IIO_CHAN_SOFT_TIMESTAMP(1),
{
.type = IIO_TEMP,
.address = ATLAS_REG_DO_TEMP_DATA,
.info_mask_separate =
BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
.output = 1,
.scan_index = -1
},
};
static int atlas_check_ph_calibration(struct atlas_data *data)
{
struct device *dev = &data->client->dev;
@ -263,7 +286,31 @@ static int atlas_check_orp_calibration(struct atlas_data *data)
dev_warn(dev, "device has not been calibrated\n");
return 0;
};
}
static int atlas_check_do_calibration(struct atlas_data *data)
{
struct device *dev = &data->client->dev;
int ret;
unsigned int val;
ret = regmap_read(data->regmap, ATLAS_REG_DO_CALIB_STATUS, &val);
if (ret)
return ret;
if (!(val & ATLAS_REG_DO_CALIB_STATUS_MASK)) {
dev_warn(dev, "device has not been calibrated\n");
return 0;
}
if (!(val & ATLAS_REG_DO_CALIB_STATUS_PRESSURE))
dev_warn(dev, "device missing atmospheric pressure calibration\n");
if (!(val & ATLAS_REG_DO_CALIB_STATUS_DO))
dev_warn(dev, "device missing dissolved oxygen calibration\n");
return 0;
}
struct atlas_device {
const struct iio_chan_spec *channels;
@ -296,6 +343,13 @@ static struct atlas_device atlas_devices[] = {
.calibration = &atlas_check_orp_calibration,
.delay = ATLAS_ORP_INT_TIME_IN_MS,
},
[ATLAS_DO_SM] = {
.channels = atlas_do_channels,
.num_channels = 3,
.data_reg = ATLAS_REG_DO_DATA,
.calibration = &atlas_check_do_calibration,
.delay = ATLAS_DO_INT_TIME_IN_MS,
},
};
static int atlas_set_powermode(struct atlas_data *data, int on)
@ -511,6 +565,7 @@ static const struct i2c_device_id atlas_id[] = {
{ "atlas-ph-sm", ATLAS_PH_SM},
{ "atlas-ec-sm", ATLAS_EC_SM},
{ "atlas-orp-sm", ATLAS_ORP_SM},
{ "atlas-do-sm", ATLAS_DO_SM},
{}
};
MODULE_DEVICE_TABLE(i2c, atlas_id);
@ -519,6 +574,7 @@ static const struct of_device_id atlas_dt_ids[] = {
{ .compatible = "atlas,ph-sm", .data = (void *)ATLAS_PH_SM, },
{ .compatible = "atlas,ec-sm", .data = (void *)ATLAS_EC_SM, },
{ .compatible = "atlas,orp-sm", .data = (void *)ATLAS_ORP_SM, },
{ .compatible = "atlas,do-sm", .data = (void *)ATLAS_DO_SM, },
{ }
};
MODULE_DEVICE_TABLE(of, atlas_dt_ids);