iio: chemical: atlas-ph-sensor: add ORP feature

Signed-off-by: Matt Ranostay <mranostay@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Matt Ranostay 2016-08-19 13:36:11 -07:00 committed by Jonathan Cameron
parent d7c0e5ae70
commit ce08cc986e
3 changed files with 75 additions and 1 deletions

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@ -0,0 +1,22 @@
* Atlas Scientific ORP-SM OEM sensor
https://www.atlas-scientific.com/_files/_datasheets/_oem/ORP_oem_datasheet.pdf
Required properties:
- compatible: must be "atlas,orp-sm"
- reg: the I2C address of the sensor
- interrupt-parent: should be the phandle for the interrupt controller
- interrupts: the sole interrupt generated by the device
Refer to interrupt-controller/interrupts.txt for generic interrupt client
node bindings.
Example:
atlas@66 {
compatible = "atlas,orp-sm";
reg = <0x66>;
interrupt-parent = <&gpio1>;
interrupts = <16 2>;
};

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@ -16,6 +16,7 @@ config ATLAS_PH_SENSOR
Atlas Scientific OEM SM sensors:
* pH SM sensor
* EC SM sensor
* ORP SM sensor
To compile this driver as module, choose M here: the
module will be called atlas-ph-sensor.

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@ -66,12 +66,17 @@
#define ATLAS_REG_TDS_DATA 0x1c
#define ATLAS_REG_PSS_DATA 0x20
#define ATLAS_REG_ORP_CALIB_STATUS 0x0d
#define ATLAS_REG_ORP_DATA 0x0e
#define ATLAS_PH_INT_TIME_IN_US 450000
#define ATLAS_EC_INT_TIME_IN_US 650000
#define ATLAS_ORP_INT_TIME_IN_US 450000
enum {
ATLAS_PH_SM,
ATLAS_EC_SM,
ATLAS_ORP_SM,
};
struct atlas_data {
@ -159,6 +164,23 @@ static const struct iio_chan_spec atlas_ec_channels[] = {
},
};
static const struct iio_chan_spec atlas_orp_channels[] = {
{
.type = IIO_VOLTAGE,
.address = ATLAS_REG_ORP_DATA,
.info_mask_separate =
BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
.scan_index = 0,
.scan_type = {
.sign = 's',
.realbits = 32,
.storagebits = 32,
.endianness = IIO_BE,
},
},
IIO_CHAN_SOFT_TIMESTAMP(1),
};
static int atlas_check_ph_calibration(struct atlas_data *data)
{
struct device *dev = &data->client->dev;
@ -224,6 +246,22 @@ static int atlas_check_ec_calibration(struct atlas_data *data)
return 0;
}
static int atlas_check_orp_calibration(struct atlas_data *data)
{
struct device *dev = &data->client->dev;
int ret;
unsigned int val;
ret = regmap_read(data->regmap, ATLAS_REG_ORP_CALIB_STATUS, &val);
if (ret)
return ret;
if (!val)
dev_warn(dev, "device has not been calibrated\n");
return 0;
};
struct atlas_device {
const struct iio_chan_spec *channels;
int num_channels;
@ -248,7 +286,13 @@ static struct atlas_device atlas_devices[] = {
.calibration = &atlas_check_ec_calibration,
.delay = ATLAS_EC_INT_TIME_IN_US,
},
[ATLAS_ORP_SM] = {
.channels = atlas_orp_channels,
.num_channels = 2,
.data_reg = ATLAS_REG_ORP_DATA,
.calibration = &atlas_check_orp_calibration,
.delay = ATLAS_ORP_INT_TIME_IN_US,
},
};
static int atlas_set_powermode(struct atlas_data *data, int on)
@ -386,6 +430,7 @@ static int atlas_read_raw(struct iio_dev *indio_dev,
case IIO_PH:
case IIO_CONCENTRATION:
case IIO_ELECTRICALCONDUCTIVITY:
case IIO_VOLTAGE:
ret = iio_device_claim_direct_mode(indio_dev);
if (ret)
return ret;
@ -422,6 +467,10 @@ static int atlas_read_raw(struct iio_dev *indio_dev,
*val = 0; /* 0.000000001 */
*val2 = 1000;
return IIO_VAL_INT_PLUS_NANO;
case IIO_VOLTAGE:
*val = 1; /* 0.1 */
*val2 = 10;
break;
default:
return -EINVAL;
}
@ -457,6 +506,7 @@ static const struct iio_info atlas_info = {
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},
{}
};
MODULE_DEVICE_TABLE(i2c, atlas_id);
@ -464,6 +514,7 @@ MODULE_DEVICE_TABLE(i2c, atlas_id);
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, },
{ }
};
MODULE_DEVICE_TABLE(of, atlas_dt_ids);