forked from Minki/linux
iio: chemical: atlas-ph-sensor: add EC feature
Signed-off-by: Matt Ranostay <mranostay@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Matt Ranostay
Jonathan Cameron
parent
4b9d2090a4
commit
e8dd92bfbf
@ -0,0 +1,22 @@
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* Atlas Scientific EC-SM OEM sensor
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http://www.atlas-scientific.com/_files/_datasheets/_oem/EC_oem_datasheet.pdf
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Required properties:
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- compatible: must be "atlas,ec-sm"
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- reg: the I2C address of the sensor
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- interrupt-parent: should be the phandle for the interrupt controller
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- interrupts: the sole interrupt generated by the device
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Refer to interrupt-controller/interrupts.txt for generic interrupt client
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node bindings.
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Example:
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atlas@64 {
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compatible = "atlas,ec-sm";
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reg = <0x64>;
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interrupt-parent = <&gpio1>;
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interrupts = <16 2>;
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};
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@ -5,15 +5,17 @@
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menu "Chemical Sensors"
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config ATLAS_PH_SENSOR
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tristate "Atlas Scientific OEM pH-SM sensor"
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tristate "Atlas Scientific OEM SM sensors"
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depends on I2C
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select REGMAP_I2C
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select IIO_BUFFER
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select IIO_TRIGGERED_BUFFER
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select IRQ_WORK
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help
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Say Y here to build I2C interface support for the Atlas
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Scientific OEM pH-SM sensor.
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Say Y here to build I2C interface support for the following
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Atlas Scientific OEM SM sensors:
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* pH SM sensor
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* EC SM sensor
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To compile this driver as module, choose M here: the
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module will be called atlas-ph-sensor.
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@ -50,13 +50,28 @@
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#define ATLAS_REG_PH_CALIB_STATUS_MID BIT(1)
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#define ATLAS_REG_PH_CALIB_STATUS_HIGH BIT(2)
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#define ATLAS_REG_EC_CALIB_STATUS 0x0f
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#define ATLAS_REG_EC_CALIB_STATUS_MASK 0x0f
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#define ATLAS_REG_EC_CALIB_STATUS_DRY BIT(0)
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#define ATLAS_REG_EC_CALIB_STATUS_SINGLE BIT(1)
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#define ATLAS_REG_EC_CALIB_STATUS_LOW BIT(2)
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#define ATLAS_REG_EC_CALIB_STATUS_HIGH BIT(3)
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#define ATLAS_REG_PH_TEMP_DATA 0x0e
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#define ATLAS_REG_PH_DATA 0x16
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#define ATLAS_REG_EC_PROBE 0x08
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#define ATLAS_REG_EC_TEMP_DATA 0x10
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#define ATLAS_REG_EC_DATA 0x18
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#define ATLAS_REG_TDS_DATA 0x1c
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#define ATLAS_REG_PSS_DATA 0x20
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#define ATLAS_PH_INT_TIME_IN_US 450000
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#define ATLAS_EC_INT_TIME_IN_US 650000
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enum {
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ATLAS_PH_SM,
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ATLAS_EC_SM,
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};
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struct atlas_data {
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@ -66,12 +81,13 @@ struct atlas_data {
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struct regmap *regmap;
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struct irq_work work;
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__be32 buffer[4]; /* 32-bit pH data + 32-bit pad + 64-bit timestamp */
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__be32 buffer[6]; /* 96-bit data + 32-bit pad + 64-bit timestamp */
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};
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static const struct regmap_range atlas_volatile_ranges[] = {
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regmap_reg_range(ATLAS_REG_INT_CONTROL, ATLAS_REG_INT_CONTROL),
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regmap_reg_range(ATLAS_REG_PH_DATA, ATLAS_REG_PH_DATA + 4),
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regmap_reg_range(ATLAS_REG_EC_DATA, ATLAS_REG_PSS_DATA + 4),
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};
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static const struct regmap_access_table atlas_volatile_table = {
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@ -86,7 +102,7 @@ static const struct regmap_config atlas_regmap_config = {
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.val_bits = 8,
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.volatile_table = &atlas_volatile_table,
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.max_register = ATLAS_REG_PH_DATA + 4,
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.max_register = ATLAS_REG_PSS_DATA + 4,
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.cache_type = REGCACHE_RBTREE,
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};
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@ -115,6 +131,50 @@ static const struct iio_chan_spec atlas_ph_channels[] = {
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},
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};
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#define ATLAS_EC_CHANNEL(_idx, _addr) \
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{\
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.type = IIO_CONCENTRATION, \
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.indexed = 1, \
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.channel = _idx, \
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.address = _addr, \
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.info_mask_separate = \
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BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), \
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.scan_index = _idx + 1, \
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.scan_type = { \
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.sign = 'u', \
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.realbits = 32, \
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.storagebits = 32, \
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.endianness = IIO_BE, \
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}, \
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}
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static const struct iio_chan_spec atlas_ec_channels[] = {
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{
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.type = IIO_ELECTRICALCONDUCTIVITY,
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.address = ATLAS_REG_EC_DATA,
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.info_mask_separate =
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BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
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.scan_index = 0,
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.scan_type = {
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.sign = 'u',
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.realbits = 32,
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.storagebits = 32,
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.endianness = IIO_BE,
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},
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},
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ATLAS_EC_CHANNEL(0, ATLAS_REG_TDS_DATA),
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ATLAS_EC_CHANNEL(1, ATLAS_REG_PSS_DATA),
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IIO_CHAN_SOFT_TIMESTAMP(3),
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{
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.type = IIO_TEMP,
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.address = ATLAS_REG_EC_TEMP_DATA,
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.info_mask_separate =
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BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
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.output = 1,
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.scan_index = -1
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},
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};
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static int atlas_check_ph_calibration(struct atlas_data *data)
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{
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struct device *dev = &data->client->dev;
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@ -142,6 +202,44 @@ static int atlas_check_ph_calibration(struct atlas_data *data)
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return 0;
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}
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static int atlas_check_ec_calibration(struct atlas_data *data)
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{
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struct device *dev = &data->client->dev;
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int ret;
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unsigned int val;
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ret = regmap_bulk_read(data->regmap, ATLAS_REG_EC_PROBE, &val, 2);
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if (ret)
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return ret;
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dev_info(dev, "probe set to K = %d.%.2d", be16_to_cpu(val) / 100,
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be16_to_cpu(val) % 100);
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ret = regmap_read(data->regmap, ATLAS_REG_EC_CALIB_STATUS, &val);
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if (ret)
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return ret;
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if (!(val & ATLAS_REG_EC_CALIB_STATUS_MASK)) {
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dev_warn(dev, "device has not been calibrated\n");
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return 0;
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}
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if (!(val & ATLAS_REG_EC_CALIB_STATUS_DRY))
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dev_warn(dev, "device missing dry point calibration\n");
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if (val & ATLAS_REG_EC_CALIB_STATUS_SINGLE) {
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dev_warn(dev, "device using single point calibration\n");
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} else {
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if (!(val & ATLAS_REG_EC_CALIB_STATUS_LOW))
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dev_warn(dev, "device missing low point calibration\n");
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if (!(val & ATLAS_REG_EC_CALIB_STATUS_HIGH))
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dev_warn(dev, "device missing high point calibration\n");
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}
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return 0;
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}
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struct atlas_device {
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const struct iio_chan_spec *channels;
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int num_channels;
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@ -159,6 +257,14 @@ static struct atlas_device atlas_devices[] = {
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.calibration = &atlas_check_ph_calibration,
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.delay = ATLAS_PH_INT_TIME_IN_US,
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},
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[ATLAS_EC_SM] = {
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.channels = atlas_ec_channels,
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.num_channels = 5,
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.data_reg = ATLAS_REG_EC_DATA,
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.calibration = &atlas_check_ec_calibration,
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.delay = ATLAS_EC_INT_TIME_IN_US,
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},
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};
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static int atlas_set_powermode(struct atlas_data *data, int on)
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@ -294,6 +400,8 @@ static int atlas_read_raw(struct iio_dev *indio_dev,
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(u8 *) ®, sizeof(reg));
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break;
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case IIO_PH:
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case IIO_CONCENTRATION:
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case IIO_ELECTRICALCONDUCTIVITY:
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mutex_lock(&indio_dev->mlock);
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if (iio_buffer_enabled(indio_dev))
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@ -324,6 +432,14 @@ static int atlas_read_raw(struct iio_dev *indio_dev,
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*val = 1; /* 0.001 */
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*val2 = 1000;
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break;
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case IIO_ELECTRICALCONDUCTIVITY:
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*val = 1; /* 0.00001 */
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*val = 100000;
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break;
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case IIO_CONCENTRATION:
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*val = 0; /* 0.000000001 */
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*val2 = 1000;
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return IIO_VAL_INT_PLUS_NANO;
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default:
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return -EINVAL;
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}
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@ -358,12 +474,14 @@ static const struct iio_info atlas_info = {
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static const struct i2c_device_id atlas_id[] = {
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{ "atlas-ph-sm", ATLAS_PH_SM},
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{ "atlas-ec-sm", ATLAS_EC_SM},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, atlas_id);
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static const struct of_device_id atlas_dt_ids[] = {
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{ .compatible = "atlas,ph-sm", .data = (void *)ATLAS_PH_SM, },
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{ .compatible = "atlas,ec-sm", .data = (void *)ATLAS_EC_SM, },
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{ }
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};
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MODULE_DEVICE_TABLE(of, atlas_dt_ids);
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