iio: chemical: atlas-ph-sensor: add ORP feature (ce08cc98) · Commits · EulixOS / Software / Kernel

Documentation/devicetree/bindings/iio/chemical/atlas,orp-sm.txt

0 → 100644

+22 −0

Original line number	Diff line number	Diff line
		* 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>;
		};

drivers/iio/chemical/Kconfig

+1 −0

Original line number	Diff line number	Diff line
		@@ -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.

drivers/iio/chemical/atlas-ph-sensor.c

+52 −1

Original line number	Diff line number	Diff line
		@@ -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);