summaryrefslogtreecommitdiff
path: root/drivers/iio/chemical
diff options
context:
space:
mode:
authorMatt Ranostay <mranostay@gmail.com>2016-08-19 23:36:11 +0300
committerJonathan Cameron <jic23@kernel.org>2016-08-21 13:59:53 +0300
commitce08cc986ed6bcd43fcbef83ef6efc62a2d44eef (patch)
treed3fe8098c4a41f9e40f690e549f2126d6de07624 /drivers/iio/chemical
parentd7c0e5ae70205be94809c887b8f621dd226ea2f2 (diff)
downloadlinux-ce08cc986ed6bcd43fcbef83ef6efc62a2d44eef.tar.xz
iio: chemical: atlas-ph-sensor: add ORP feature
Signed-off-by: Matt Ranostay <mranostay@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/chemical')
-rw-r--r--drivers/iio/chemical/Kconfig1
-rw-r--r--drivers/iio/chemical/atlas-ph-sensor.c53
2 files changed, 53 insertions, 1 deletions
diff --git a/drivers/iio/chemical/Kconfig b/drivers/iio/chemical/Kconfig
index 4bcc025e8c8a..cea7f9857a1f 100644
--- a/drivers/iio/chemical/Kconfig
+++ b/drivers/iio/chemical/Kconfig
@@ -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.
diff --git a/drivers/iio/chemical/atlas-ph-sensor.c b/drivers/iio/chemical/atlas-ph-sensor.c
index c0a0ebbbd54a..84fbff32b96d 100644
--- a/drivers/iio/chemical/atlas-ph-sensor.c
+++ b/drivers/iio/chemical/atlas-ph-sensor.c
@@ -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);