Signed-off-by: Matt Ranostay <mranostay@xxxxxxxxx> --- .../bindings/iio/chemical/atlas,ec-sm.txt | 22 ++++ drivers/iio/chemical/Kconfig | 8 +- drivers/iio/chemical/atlas-ph-sensor.c | 113 ++++++++++++++++++++- 3 files changed, 138 insertions(+), 5 deletions(-) create mode 100644 Documentation/devicetree/bindings/iio/chemical/atlas,ec-sm.txt diff --git a/Documentation/devicetree/bindings/iio/chemical/atlas,ec-sm.txt b/Documentation/devicetree/bindings/iio/chemical/atlas,ec-sm.txt new file mode 100644 index 0000000..2962bd9 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/chemical/atlas,ec-sm.txt @@ -0,0 +1,22 @@ +* Atlas Scientific EC-SM OEM sensor + +http://www.atlas-scientific.com/_files/_datasheets/_oem/EC_oem_datasheet.pdf + +Required properties: + + - compatible: must be "atlas,ec-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@64 { + compatible = "atlas,ec-sm"; + reg = <0x64>; + interrupt-parent = <&gpio1>; + interrupts = <16 2>; +}; diff --git a/drivers/iio/chemical/Kconfig b/drivers/iio/chemical/Kconfig index f73290f..4bcc025 100644 --- a/drivers/iio/chemical/Kconfig +++ b/drivers/iio/chemical/Kconfig @@ -5,15 +5,17 @@ menu "Chemical Sensors" config ATLAS_PH_SENSOR - tristate "Atlas Scientific OEM pH-SM sensor" + tristate "Atlas Scientific OEM SM sensors" depends on I2C select REGMAP_I2C select IIO_BUFFER select IIO_TRIGGERED_BUFFER select IRQ_WORK help - Say Y here to build I2C interface support for the Atlas - Scientific OEM pH-SM sensor. + Say Y here to build I2C interface support for the following + Atlas Scientific OEM SM sensors: + * pH SM sensor + * EC 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 c57f9c2..6dddd75 100644 --- a/drivers/iio/chemical/atlas-ph-sensor.c +++ b/drivers/iio/chemical/atlas-ph-sensor.c @@ -50,13 +50,28 @@ #define ATLAS_REG_PH_CALIB_STATUS_MID BIT(1) #define ATLAS_REG_PH_CALIB_STATUS_HIGH BIT(2) +#define ATLAS_REG_EC_CALIB_STATUS 0x0f +#define ATLAS_REG_EC_CALIB_STATUS_MASK 0x0f +#define ATLAS_REG_EC_CALIB_STATUS_DRY BIT(0) +#define ATLAS_REG_EC_CALIB_STATUS_SINGLE BIT(1) +#define ATLAS_REG_EC_CALIB_STATUS_LOW BIT(2) +#define ATLAS_REG_EC_CALIB_STATUS_HIGH BIT(3) + #define ATLAS_REG_PH_TEMP_DATA 0x0e #define ATLAS_REG_PH_DATA 0x16 +#define ATLAS_REG_EC_PROBE 0x08 +#define ATLAS_REG_EC_TEMP_DATA 0x10 +#define ATLAS_REG_EC_DATA 0x18 +#define ATLAS_REG_TDS_DATA 0x1c +#define ATLAS_REG_PSS_DATA 0x20 + #define ATLAS_PH_INT_TIME_IN_US 450000 +#define ATLAS_EC_INT_TIME_IN_US 650000 enum { ATLAS_PH_SM, + ATLAS_EC_SM, }; struct atlas_data { @@ -66,12 +81,13 @@ struct atlas_data { struct regmap *regmap; struct irq_work work; - __be32 buffer[4]; /* 32-bit pH data + 32-bit pad + 64-bit timestamp */ + __be32 buffer[6]; /* 96-bit data + 32-bit pad + 64-bit timestamp */ }; static const struct regmap_range atlas_volatile_ranges[] = { regmap_reg_range(ATLAS_REG_INT_CONTROL, ATLAS_REG_INT_CONTROL), regmap_reg_range(ATLAS_REG_PH_DATA, ATLAS_REG_PH_DATA + 4), + regmap_reg_range(ATLAS_REG_EC_DATA, ATLAS_REG_PSS_DATA + 4), }; static const struct regmap_access_table atlas_volatile_table = { @@ -86,7 +102,7 @@ static const struct regmap_config atlas_regmap_config = { .val_bits = 8, .volatile_table = &atlas_volatile_table, - .max_register = ATLAS_REG_PH_DATA + 4, + .max_register = ATLAS_REG_PSS_DATA + 4, .cache_type = REGCACHE_RBTREE, }; @@ -115,6 +131,38 @@ static const struct iio_chan_spec atlas_ph_channels[] = { }, }; +#define ATLAS_EC_CHANNEL(idx, addr) \ + {\ + .type = IIO_CONCENTRATION, \ + .indexed = 1, \ + .channel = idx, \ + .address = addr, \ + .info_mask_separate = \ + BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), \ + .scan_index = idx, \ + .scan_type = { \ + .sign = 'u', \ + .realbits = 32, \ + .storagebits = 32, \ + .endianness = IIO_BE, \ + }, \ + } + +static const struct iio_chan_spec atlas_ec_channels[] = { + ATLAS_EC_CHANNEL(0, ATLAS_REG_EC_DATA), + ATLAS_EC_CHANNEL(1, ATLAS_REG_TDS_DATA), + ATLAS_EC_CHANNEL(2, ATLAS_REG_PSS_DATA), + IIO_CHAN_SOFT_TIMESTAMP(3), + { + .type = IIO_TEMP, + .address = ATLAS_REG_EC_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; @@ -142,6 +190,44 @@ static int atlas_check_ph_calibration(struct atlas_data *data) return 0; } +static int atlas_check_ec_calibration(struct atlas_data *data) +{ + struct device *dev = &data->client->dev; + int ret; + unsigned int val; + + ret = regmap_bulk_read(data->regmap, ATLAS_REG_EC_PROBE, &val, 2); + if (ret) + return ret; + + dev_info(dev, "probe set to K = %d.%.2d", be16_to_cpu(val) / 100, + be16_to_cpu(val) % 100); + + ret = regmap_read(data->regmap, ATLAS_REG_EC_CALIB_STATUS, &val); + if (ret) + return ret; + + if (!(val & ATLAS_REG_EC_CALIB_STATUS_MASK)) { + dev_warn(dev, "device has not been calibrated\n"); + return 0; + } + + if (!(val & ATLAS_REG_EC_CALIB_STATUS_DRY)) + dev_warn(dev, "device missing dry point calibration\n"); + + if (val & ATLAS_REG_EC_CALIB_STATUS_SINGLE) { + dev_warn(dev, "device using single point calibration\n"); + } else { + if (!(val & ATLAS_REG_EC_CALIB_STATUS_LOW)) + dev_warn(dev, "device missing low point calibration\n"); + + if (!(val & ATLAS_REG_EC_CALIB_STATUS_HIGH)) + dev_warn(dev, "device missing high point calibration\n"); + } + + return 0; +} + struct atlas_device { const struct iio_chan_spec *channels; int num_channels; @@ -159,6 +245,14 @@ static struct atlas_device atlas_devices[] = { .calibration = &atlas_check_ph_calibration, .delay = ATLAS_PH_INT_TIME_IN_US, }, + [ATLAS_EC_SM] = { + .channels = atlas_ec_channels, + .num_channels = 5, + .data_reg = ATLAS_REG_EC_DATA, + .calibration = &atlas_check_ec_calibration, + .delay = ATLAS_EC_INT_TIME_IN_US, + }, + }; static int atlas_set_powermode(struct atlas_data *data, int on) @@ -294,6 +388,7 @@ static int atlas_read_raw(struct iio_dev *indio_dev, (u8 *) ®, sizeof(reg)); break; case IIO_PH: + case IIO_CONCENTRATION: mutex_lock(&indio_dev->mlock); if (iio_buffer_enabled(indio_dev)) @@ -324,6 +419,18 @@ static int atlas_read_raw(struct iio_dev *indio_dev, *val = 1; /* 0.001 */ *val2 = 1000; break; + case IIO_CONCENTRATION: + switch (chan->address) { + case ATLAS_REG_EC_DATA: + *val = 0; /* 0.00000000064 */ + *val2 = 640; + return IIO_VAL_INT_PLUS_NANO; + default: + *val = 0; /* 0.000000001 */ + *val2 = 1000; + return IIO_VAL_INT_PLUS_NANO; + } + break; default: return -EINVAL; } @@ -517,12 +624,14 @@ static const struct dev_pm_ops atlas_pm_ops = { static const struct i2c_device_id atlas_id[] = { { "atlas-ph-sm", ATLAS_PH_SM}, + { "atlas-ec-sm", ATLAS_EC_SM}, {} }; 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, }, { } }; MODULE_DEVICE_TABLE(of, atlas_dt_ids); -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
