[linux.git] / drivers / iio / chemical / atlas-ph-sensor.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * atlas-ph-sensor.c - Support for Atlas Scientific OEM pH-SM sensor
 *
 * Copyright (C) 2015-2018 Matt Ranostay
 * Author: Matt Ranostay <[email protected]>
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/err.h>
#include <linux/irq.h>
#include <linux/irq_work.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/of_device.h>
#include <linux/regmap.h>
#include <linux/iio/iio.h>
#include <linux/iio/buffer.h>
#include <linux/iio/trigger.h>
#include <linux/iio/trigger_consumer.h>
#include <linux/iio/triggered_buffer.h>
#include <linux/pm_runtime.h>

#define ATLAS_REGMAP_NAME	"atlas_ph_regmap"
#define ATLAS_DRV_NAME		"atlas_ph"

#define ATLAS_REG_DEV_TYPE		0x00
#define ATLAS_REG_DEV_VERSION		0x01

#define ATLAS_REG_INT_CONTROL		0x04
#define ATLAS_REG_INT_CONTROL_EN	BIT(3)

#define ATLAS_REG_PWR_CONTROL		0x06

#define ATLAS_REG_PH_CALIB_STATUS	0x0d
#define ATLAS_REG_PH_CALIB_STATUS_MASK	0x07
#define ATLAS_REG_PH_CALIB_STATUS_LOW	BIT(0)
#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_REG_ORP_CALIB_STATUS	0x0d
#define ATLAS_REG_ORP_DATA		0x0e

#define ATLAS_PH_INT_TIME_IN_MS		450
#define ATLAS_EC_INT_TIME_IN_MS		650
#define ATLAS_ORP_INT_TIME_IN_MS	450

enum {
	ATLAS_PH_SM,
	ATLAS_EC_SM,
	ATLAS_ORP_SM,
};

struct atlas_data {
	struct i2c_client *client;
	struct iio_trigger *trig;
	struct atlas_device *chip;
	struct regmap *regmap;
	struct irq_work work;

	__be32 buffer[6]; /* 96-bit data + 32-bit pad + 64-bit timestamp */
};

static const struct regmap_config atlas_regmap_config = {
	.name = ATLAS_REGMAP_NAME,
	.reg_bits = 8,
	.val_bits = 8,
};

static const struct iio_chan_spec atlas_ph_channels[] = {
	{
		.type = IIO_PH,
		.address = ATLAS_REG_PH_DATA,
		.info_mask_separate =
			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
		.scan_index = 0,
		.scan_type = {
			.sign = 'u',
			.realbits = 32,
			.storagebits = 32,
			.endianness = IIO_BE,
		},
	},
	IIO_CHAN_SOFT_TIMESTAMP(1),
	{
		.type = IIO_TEMP,
		.address = ATLAS_REG_PH_TEMP_DATA,
		.info_mask_separate =
			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
		.output = 1,
		.scan_index = -1
	},
};

#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 + 1, \
		.scan_type = { \
			.sign = 'u', \
			.realbits = 32, \
			.storagebits = 32, \
			.endianness = IIO_BE, \
		}, \
	}

static const struct iio_chan_spec atlas_ec_channels[] = {
	{
		.type = IIO_ELECTRICALCONDUCTIVITY,
		.address = ATLAS_REG_EC_DATA,
		.info_mask_separate =
			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
		.scan_index = 0,
		.scan_type = {
			.sign = 'u',
			.realbits = 32,
			.storagebits = 32,
			.endianness = IIO_BE,
		},
	},
	ATLAS_EC_CHANNEL(0, ATLAS_REG_TDS_DATA),
	ATLAS_EC_CHANNEL(1, 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 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;
	int ret;
	unsigned int val;

	ret = regmap_read(data->regmap, ATLAS_REG_PH_CALIB_STATUS, &val);
	if (ret)
		return ret;

	if (!(val & ATLAS_REG_PH_CALIB_STATUS_MASK)) {
		dev_warn(dev, "device has not been calibrated\n");
		return 0;
	}

	if (!(val & ATLAS_REG_PH_CALIB_STATUS_LOW))
		dev_warn(dev, "device missing low point calibration\n");

	if (!(val & ATLAS_REG_PH_CALIB_STATUS_MID))
		dev_warn(dev, "device missing mid point calibration\n");

	if (!(val & ATLAS_REG_PH_CALIB_STATUS_HIGH))
		dev_warn(dev, "device missing high point calibration\n");

	return 0;
}

static int atlas_check_ec_calibration(struct atlas_data *data)
{
	struct device *dev = &data->client->dev;
	int ret;
	unsigned int val;
	__be16	rval;

	ret = regmap_bulk_read(data->regmap, ATLAS_REG_EC_PROBE, &rval, 2);
	if (ret)
		return ret;

	val = be16_to_cpu(rval);
	dev_info(dev, "probe set to K = %d.%.2d", val / 100, 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;
}

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;
	int data_reg;

	int (*calibration)(struct atlas_data *data);
	int delay;
};

static struct atlas_device atlas_devices[] = {
	[ATLAS_PH_SM] = {
				.channels = atlas_ph_channels,
				.num_channels = 3,
				.data_reg = ATLAS_REG_PH_DATA,
				.calibration = &atlas_check_ph_calibration,
				.delay = ATLAS_PH_INT_TIME_IN_MS,
	},
	[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_MS,
	},
	[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_MS,
	},
};

static int atlas_set_powermode(struct atlas_data *data, int on)
{
	return regmap_write(data->regmap, ATLAS_REG_PWR_CONTROL, on);
}

static int atlas_set_interrupt(struct atlas_data *data, bool state)
{
	return regmap_update_bits(data->regmap, ATLAS_REG_INT_CONTROL,
				  ATLAS_REG_INT_CONTROL_EN,
				  state ? ATLAS_REG_INT_CONTROL_EN : 0);
}

static int atlas_buffer_postenable(struct iio_dev *indio_dev)
{
	struct atlas_data *data = iio_priv(indio_dev);
	int ret;

	ret = iio_triggered_buffer_postenable(indio_dev);
	if (ret)
		return ret;

	ret = pm_runtime_get_sync(&data->client->dev);
	if (ret < 0) {
		pm_runtime_put_noidle(&data->client->dev);
		return ret;
	}

	return atlas_set_interrupt(data, true);
}

static int atlas_buffer_predisable(struct iio_dev *indio_dev)
{
	struct atlas_data *data = iio_priv(indio_dev);
	int ret;

	ret = iio_triggered_buffer_predisable(indio_dev);
	if (ret)
		return ret;

	ret = atlas_set_interrupt(data, false);
	if (ret)
		return ret;

	pm_runtime_mark_last_busy(&data->client->dev);
	return pm_runtime_put_autosuspend(&data->client->dev);
}

static const struct iio_trigger_ops atlas_interrupt_trigger_ops = {
};

static const struct iio_buffer_setup_ops atlas_buffer_setup_ops = {
	.postenable = atlas_buffer_postenable,
	.predisable = atlas_buffer_predisable,
};

static void atlas_work_handler(struct irq_work *work)
{
	struct atlas_data *data = container_of(work, struct atlas_data, work);

	iio_trigger_poll(data->trig);
}

static irqreturn_t atlas_trigger_handler(int irq, void *private)
{
	struct iio_poll_func *pf = private;
	struct iio_dev *indio_dev = pf->indio_dev;
	struct atlas_data *data = iio_priv(indio_dev);
	int ret;

	ret = regmap_bulk_read(data->regmap, data->chip->data_reg,
			      (u8 *) &data->buffer,
			      sizeof(__be32) * (data->chip->num_channels - 2));

	if (!ret)
		iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
				iio_get_time_ns(indio_dev));

	iio_trigger_notify_done(indio_dev->trig);

	return IRQ_HANDLED;
}

static irqreturn_t atlas_interrupt_handler(int irq, void *private)
{
	struct iio_dev *indio_dev = private;
	struct atlas_data *data = iio_priv(indio_dev);

	irq_work_queue(&data->work);

	return IRQ_HANDLED;
}

static int atlas_read_measurement(struct atlas_data *data, int reg, __be32 *val)
{
	struct device *dev = &data->client->dev;
	int suspended = pm_runtime_suspended(dev);
	int ret;

	ret = pm_runtime_get_sync(dev);
	if (ret < 0) {
		pm_runtime_put_noidle(dev);
		return ret;
	}

	if (suspended)
		msleep(data->chip->delay);

	ret = regmap_bulk_read(data->regmap, reg, (u8 *) val, sizeof(*val));

	pm_runtime_mark_last_busy(dev);
	pm_runtime_put_autosuspend(dev);

	return ret;
}

static int atlas_read_raw(struct iio_dev *indio_dev,
			  struct iio_chan_spec const *chan,
			  int *val, int *val2, long mask)
{
	struct atlas_data *data = iio_priv(indio_dev);

	switch (mask) {
	case IIO_CHAN_INFO_RAW: {
		int ret;
		__be32 reg;

		switch (chan->type) {
		case IIO_TEMP:
			ret = regmap_bulk_read(data->regmap, chan->address,
					      (u8 *) &reg, sizeof(reg));
			break;
		case IIO_PH:
		case IIO_CONCENTRATION:
		case IIO_ELECTRICALCONDUCTIVITY:
		case IIO_VOLTAGE:
			ret = iio_device_claim_direct_mode(indio_dev);
			if (ret)
				return ret;

			ret = atlas_read_measurement(data, chan->address, &reg);

			iio_device_release_direct_mode(indio_dev);
			break;
		default:
			ret = -EINVAL;
		}

		if (!ret) {
			*val = be32_to_cpu(reg);
			ret = IIO_VAL_INT;
		}
		return ret;
	}
	case IIO_CHAN_INFO_SCALE:
		switch (chan->type) {
		case IIO_TEMP:
			*val = 10;
			return IIO_VAL_INT;
		case IIO_PH:
			*val = 1; /* 0.001 */
			*val2 = 1000;
			break;
		case IIO_ELECTRICALCONDUCTIVITY:
			*val = 1; /* 0.00001 */
			*val2 = 100000;
			break;
		case IIO_CONCENTRATION:
			*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;
		}
		return IIO_VAL_FRACTIONAL;
	}

	return -EINVAL;
}

static int atlas_write_raw(struct iio_dev *indio_dev,
			   struct iio_chan_spec const *chan,
			   int val, int val2, long mask)
{
	struct atlas_data *data = iio_priv(indio_dev);
	__be32 reg = cpu_to_be32(val / 10);

	if (val2 != 0 || val < 0 || val > 20000)
		return -EINVAL;

	if (mask != IIO_CHAN_INFO_RAW || chan->type != IIO_TEMP)
		return -EINVAL;

	return regmap_bulk_write(data->regmap, chan->address,
				 &reg, sizeof(reg));
}

static const struct iio_info atlas_info = {
	.read_raw = atlas_read_raw,
	.write_raw = atlas_write_raw,
};

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);

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);

static int atlas_probe(struct i2c_client *client,
		       const struct i2c_device_id *id)
{
	struct atlas_data *data;
	struct atlas_device *chip;
	const struct of_device_id *of_id;
	struct iio_trigger *trig;
	struct iio_dev *indio_dev;
	int ret;

	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
	if (!indio_dev)
		return -ENOMEM;

	of_id = of_match_device(atlas_dt_ids, &client->dev);
	if (!of_id)
		chip = &atlas_devices[id->driver_data];
	else
		chip = &atlas_devices[(unsigned long)of_id->data];

	indio_dev->info = &atlas_info;
	indio_dev->name = ATLAS_DRV_NAME;
	indio_dev->channels = chip->channels;
	indio_dev->num_channels = chip->num_channels;
	indio_dev->modes = INDIO_BUFFER_SOFTWARE | INDIO_DIRECT_MODE;
	indio_dev->dev.parent = &client->dev;

	trig = devm_iio_trigger_alloc(&client->dev, "%s-dev%d",
				      indio_dev->name, indio_dev->id);

	if (!trig)
		return -ENOMEM;

	data = iio_priv(indio_dev);
	data->client = client;
	data->trig = trig;
	data->chip = chip;
	trig->dev.parent = indio_dev->dev.parent;
	trig->ops = &atlas_interrupt_trigger_ops;
	iio_trigger_set_drvdata(trig, indio_dev);

	i2c_set_clientdata(client, indio_dev);

	data->regmap = devm_regmap_init_i2c(client, &atlas_regmap_config);
	if (IS_ERR(data->regmap)) {
		dev_err(&client->dev, "regmap initialization failed\n");
		return PTR_ERR(data->regmap);
	}

	ret = pm_runtime_set_active(&client->dev);
	if (ret)
		return ret;

	if (client->irq <= 0) {
		dev_err(&client->dev, "no valid irq defined\n");
		return -EINVAL;
	}

	ret = chip->calibration(data);
	if (ret)
		return ret;

	ret = iio_trigger_register(trig);
	if (ret) {
		dev_err(&client->dev, "failed to register trigger\n");
		return ret;
	}

	ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
		&atlas_trigger_handler, &atlas_buffer_setup_ops);
	if (ret) {
		dev_err(&client->dev, "cannot setup iio trigger\n");
		goto unregister_trigger;
	}

	init_irq_work(&data->work, atlas_work_handler);

	/* interrupt pin toggles on new conversion */
	ret = devm_request_threaded_irq(&client->dev, client->irq,
					NULL, atlas_interrupt_handler,
					IRQF_TRIGGER_RISING |
					IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
					"atlas_irq",
					indio_dev);
	if (ret) {
		dev_err(&client->dev, "request irq (%d) failed\n", client->irq);
		goto unregister_buffer;
	}

	ret = atlas_set_powermode(data, 1);
	if (ret) {
		dev_err(&client->dev, "cannot power device on");
		goto unregister_buffer;
	}

	pm_runtime_enable(&client->dev);
	pm_runtime_set_autosuspend_delay(&client->dev, 2500);
	pm_runtime_use_autosuspend(&client->dev);

	ret = iio_device_register(indio_dev);
	if (ret) {
		dev_err(&client->dev, "unable to register device\n");
		goto unregister_pm;
	}

	return 0;

unregister_pm:
	pm_runtime_disable(&client->dev);
	atlas_set_powermode(data, 0);

unregister_buffer:
	iio_triggered_buffer_cleanup(indio_dev);

unregister_trigger:
	iio_trigger_unregister(data->trig);

	return ret;
}

static int atlas_remove(struct i2c_client *client)
{
	struct iio_dev *indio_dev = i2c_get_clientdata(client);
	struct atlas_data *data = iio_priv(indio_dev);

	iio_device_unregister(indio_dev);
	iio_triggered_buffer_cleanup(indio_dev);
	iio_trigger_unregister(data->trig);

	pm_runtime_disable(&client->dev);
	pm_runtime_set_suspended(&client->dev);
	pm_runtime_put_noidle(&client->dev);

	return atlas_set_powermode(data, 0);
}

#ifdef CONFIG_PM
static int atlas_runtime_suspend(struct device *dev)
{
	struct atlas_data *data =
		     iio_priv(i2c_get_clientdata(to_i2c_client(dev)));

	return atlas_set_powermode(data, 0);
}

static int atlas_runtime_resume(struct device *dev)
{
	struct atlas_data *data =
		     iio_priv(i2c_get_clientdata(to_i2c_client(dev)));

	return atlas_set_powermode(data, 1);
}
#endif

static const struct dev_pm_ops atlas_pm_ops = {
	SET_RUNTIME_PM_OPS(atlas_runtime_suspend,
			   atlas_runtime_resume, NULL)
};

static struct i2c_driver atlas_driver = {
	.driver = {
		.name	= ATLAS_DRV_NAME,
		.of_match_table	= of_match_ptr(atlas_dt_ids),
		.pm	= &atlas_pm_ops,
	},
	.probe		= atlas_probe,
	.remove		= atlas_remove,
	.id_table	= atlas_id,
};
module_i2c_driver(atlas_driver);

MODULE_AUTHOR("Matt Ranostay <[email protected]>");
MODULE_DESCRIPTION("Atlas Scientific pH-SM sensor");
MODULE_LICENSE("GPL");
Commit	Line	Data
d6ad8058	1	// SPDX-License-Identifier: GPL-2.0+
27dec00e MR	2	/*
	3	* atlas-ph-sensor.c - Support for Atlas Scientific OEM pH-SM sensor
	4	*
d6ad8058 MR	5	* Copyright (C) 2015-2018 Matt Ranostay
d6ad8058 MR	6	* Author: Matt Ranostay <[email protected]>
27dec00e MR	7	*/
	8
	9	#include <linux/module.h>
	10	#include <linux/init.h>
	11	#include <linux/interrupt.h>
	12	#include <linux/delay.h>
	13	#include <linux/mutex.h>
	14	#include <linux/err.h>
	15	#include <linux/irq.h>
	16	#include <linux/irq_work.h>
	17	#include <linux/gpio.h>
	18	#include <linux/i2c.h>
7103b99b	19	#include <linux/of_device.h>
27dec00e MR	20	#include <linux/regmap.h>
	21	#include <linux/iio/iio.h>
	22	#include <linux/iio/buffer.h>
	23	#include <linux/iio/trigger.h>
	24	#include <linux/iio/trigger_consumer.h>
	25	#include <linux/iio/triggered_buffer.h>
	26	#include <linux/pm_runtime.h>
	27
	28	#define ATLAS_REGMAP_NAME "atlas_ph_regmap"
	29	#define ATLAS_DRV_NAME "atlas_ph"
	30
	31	#define ATLAS_REG_DEV_TYPE 0x00
	32	#define ATLAS_REG_DEV_VERSION 0x01
	33
	34	#define ATLAS_REG_INT_CONTROL 0x04
	35	#define ATLAS_REG_INT_CONTROL_EN BIT(3)
	36
	37	#define ATLAS_REG_PWR_CONTROL 0x06
	38
7103b99b MR	39	#define ATLAS_REG_PH_CALIB_STATUS 0x0d
	40	#define ATLAS_REG_PH_CALIB_STATUS_MASK 0x07
	41	#define ATLAS_REG_PH_CALIB_STATUS_LOW BIT(0)
	42	#define ATLAS_REG_PH_CALIB_STATUS_MID BIT(1)
	43	#define ATLAS_REG_PH_CALIB_STATUS_HIGH BIT(2)
27dec00e	44
e8dd92bf MR	45	#define ATLAS_REG_EC_CALIB_STATUS 0x0f
	46	#define ATLAS_REG_EC_CALIB_STATUS_MASK 0x0f
	47	#define ATLAS_REG_EC_CALIB_STATUS_DRY BIT(0)
	48	#define ATLAS_REG_EC_CALIB_STATUS_SINGLE BIT(1)
	49	#define ATLAS_REG_EC_CALIB_STATUS_LOW BIT(2)
	50	#define ATLAS_REG_EC_CALIB_STATUS_HIGH BIT(3)
	51
7103b99b	52	#define ATLAS_REG_PH_TEMP_DATA 0x0e
27dec00e MR	53	#define ATLAS_REG_PH_DATA 0x16
27dec00e MR	54
e8dd92bf MR	55	#define ATLAS_REG_EC_PROBE 0x08
	56	#define ATLAS_REG_EC_TEMP_DATA 0x10
	57	#define ATLAS_REG_EC_DATA 0x18
	58	#define ATLAS_REG_TDS_DATA 0x1c
	59	#define ATLAS_REG_PSS_DATA 0x20
	60
ce08cc98 MR	61	#define ATLAS_REG_ORP_CALIB_STATUS 0x0d
	62	#define ATLAS_REG_ORP_DATA 0x0e
	63
02112260 MR	64	#define ATLAS_PH_INT_TIME_IN_MS 450
	65	#define ATLAS_EC_INT_TIME_IN_MS 650
	66	#define ATLAS_ORP_INT_TIME_IN_MS 450
27dec00e	67
7103b99b MR	68	enum {
7103b99b MR	69	ATLAS_PH_SM,
e8dd92bf	70	ATLAS_EC_SM,
ce08cc98	71	ATLAS_ORP_SM,
7103b99b MR	72	};
7103b99b MR	73
27dec00e MR	74	struct atlas_data {
	75	struct i2c_client *client;
	76	struct iio_trigger *trig;
7103b99b	77	struct atlas_device *chip;
27dec00e MR	78	struct regmap *regmap;
	79	struct irq_work work;
	80
e8dd92bf	81	__be32 buffer[6]; /* 96-bit data + 32-bit pad + 64-bit timestamp */
27dec00e MR	82	};
27dec00e MR	83
27dec00e MR	84	static const struct regmap_config atlas_regmap_config = {
27dec00e MR	85	.name = ATLAS_REGMAP_NAME,
27dec00e MR	86	.reg_bits = 8,
27dec00e MR	87	.val_bits = 8,
27dec00e MR	88	};
27dec00e MR	89
7103b99b	90	static const struct iio_chan_spec atlas_ph_channels[] = {
27dec00e MR	91	{
27dec00e MR	92	.type = IIO_PH,
7103b99b	93	.address = ATLAS_REG_PH_DATA,
27dec00e MR	94	.info_mask_separate =
	95	BIT(IIO_CHAN_INFO_RAW) \| BIT(IIO_CHAN_INFO_SCALE),
	96	.scan_index = 0,
	97	.scan_type = {
	98	.sign = 'u',
	99	.realbits = 32,
	100	.storagebits = 32,
	101	.endianness = IIO_BE,
	102	},
	103	},
	104	IIO_CHAN_SOFT_TIMESTAMP(1),
	105	{
	106	.type = IIO_TEMP,
7103b99b	107	.address = ATLAS_REG_PH_TEMP_DATA,
27dec00e MR	108	.info_mask_separate =
	109	BIT(IIO_CHAN_INFO_RAW) \| BIT(IIO_CHAN_INFO_SCALE),
	110	.output = 1,
	111	.scan_index = -1
	112	},
	113	};
	114
e8dd92bf MR	115	#define ATLAS_EC_CHANNEL(_idx, _addr) \
	116	{\
	117	.type = IIO_CONCENTRATION, \
	118	.indexed = 1, \
	119	.channel = _idx, \
	120	.address = _addr, \
	121	.info_mask_separate = \
	122	BIT(IIO_CHAN_INFO_RAW) \| BIT(IIO_CHAN_INFO_SCALE), \
	123	.scan_index = _idx + 1, \
	124	.scan_type = { \
	125	.sign = 'u', \
	126	.realbits = 32, \
	127	.storagebits = 32, \
	128	.endianness = IIO_BE, \
	129	}, \
	130	}
	131
	132	static const struct iio_chan_spec atlas_ec_channels[] = {
	133	{
	134	.type = IIO_ELECTRICALCONDUCTIVITY,
	135	.address = ATLAS_REG_EC_DATA,
	136	.info_mask_separate =
	137	BIT(IIO_CHAN_INFO_RAW) \| BIT(IIO_CHAN_INFO_SCALE),
	138	.scan_index = 0,
	139	.scan_type = {
	140	.sign = 'u',
	141	.realbits = 32,
	142	.storagebits = 32,
	143	.endianness = IIO_BE,
	144	},
	145	},
	146	ATLAS_EC_CHANNEL(0, ATLAS_REG_TDS_DATA),
	147	ATLAS_EC_CHANNEL(1, ATLAS_REG_PSS_DATA),
	148	IIO_CHAN_SOFT_TIMESTAMP(3),
	149	{
	150	.type = IIO_TEMP,
	151	.address = ATLAS_REG_EC_TEMP_DATA,
	152	.info_mask_separate =
	153	BIT(IIO_CHAN_INFO_RAW) \| BIT(IIO_CHAN_INFO_SCALE),
	154	.output = 1,
	155	.scan_index = -1
	156	},
	157	};
	158
ce08cc98 MR	159	static const struct iio_chan_spec atlas_orp_channels[] = {
	160	{
	161	.type = IIO_VOLTAGE,
	162	.address = ATLAS_REG_ORP_DATA,
	163	.info_mask_separate =
	164	BIT(IIO_CHAN_INFO_RAW) \| BIT(IIO_CHAN_INFO_SCALE),
	165	.scan_index = 0,
	166	.scan_type = {
	167	.sign = 's',
	168	.realbits = 32,
	169	.storagebits = 32,
	170	.endianness = IIO_BE,
	171	},
	172	},
	173	IIO_CHAN_SOFT_TIMESTAMP(1),
	174	};
	175
7103b99b MR	176	static int atlas_check_ph_calibration(struct atlas_data *data)
	177	{
	178	struct device *dev = &data->client->dev;
	179	int ret;
	180	unsigned int val;
	181
	182	ret = regmap_read(data->regmap, ATLAS_REG_PH_CALIB_STATUS, &val);
	183	if (ret)
	184	return ret;
	185
	186	if (!(val & ATLAS_REG_PH_CALIB_STATUS_MASK)) {
	187	dev_warn(dev, "device has not been calibrated\n");
	188	return 0;
	189	}
	190
	191	if (!(val & ATLAS_REG_PH_CALIB_STATUS_LOW))
	192	dev_warn(dev, "device missing low point calibration\n");
	193
	194	if (!(val & ATLAS_REG_PH_CALIB_STATUS_MID))
	195	dev_warn(dev, "device missing mid point calibration\n");
	196
	197	if (!(val & ATLAS_REG_PH_CALIB_STATUS_HIGH))
	198	dev_warn(dev, "device missing high point calibration\n");
	199
	200	return 0;
	201	}
	202
e8dd92bf MR	203	static int atlas_check_ec_calibration(struct atlas_data *data)
	204	{
	205	struct device *dev = &data->client->dev;
	206	int ret;
	207	unsigned int val;
d1fe85ec	208	__be16 rval;
e8dd92bf	209
d1fe85ec	210	ret = regmap_bulk_read(data->regmap, ATLAS_REG_EC_PROBE, &rval, 2);
e8dd92bf MR	211	if (ret)
	212	return ret;
	213
d1fe85ec SB	214	val = be16_to_cpu(rval);
d1fe85ec SB	215	dev_info(dev, "probe set to K = %d.%.2d", val / 100, val % 100);
e8dd92bf MR	216
	217	ret = regmap_read(data->regmap, ATLAS_REG_EC_CALIB_STATUS, &val);
	218	if (ret)
	219	return ret;
	220
	221	if (!(val & ATLAS_REG_EC_CALIB_STATUS_MASK)) {
	222	dev_warn(dev, "device has not been calibrated\n");
	223	return 0;
	224	}
	225
	226	if (!(val & ATLAS_REG_EC_CALIB_STATUS_DRY))
	227	dev_warn(dev, "device missing dry point calibration\n");
	228
	229	if (val & ATLAS_REG_EC_CALIB_STATUS_SINGLE) {
	230	dev_warn(dev, "device using single point calibration\n");
	231	} else {
	232	if (!(val & ATLAS_REG_EC_CALIB_STATUS_LOW))
	233	dev_warn(dev, "device missing low point calibration\n");
	234
	235	if (!(val & ATLAS_REG_EC_CALIB_STATUS_HIGH))
	236	dev_warn(dev, "device missing high point calibration\n");
	237	}
	238
	239	return 0;
	240	}
	241
ce08cc98 MR	242	static int atlas_check_orp_calibration(struct atlas_data *data)
	243	{
	244	struct device *dev = &data->client->dev;
	245	int ret;
	246	unsigned int val;
	247
	248	ret = regmap_read(data->regmap, ATLAS_REG_ORP_CALIB_STATUS, &val);
	249	if (ret)
	250	return ret;
	251
	252	if (!val)
	253	dev_warn(dev, "device has not been calibrated\n");
	254
	255	return 0;
	256	};
	257
7103b99b MR	258	struct atlas_device {
	259	const struct iio_chan_spec *channels;
	260	int num_channels;
	261	int data_reg;
	262
	263	int (calibration)(struct atlas_data data);
	264	int delay;
	265	};
	266
	267	static struct atlas_device atlas_devices[] = {
	268	[ATLAS_PH_SM] = {
	269	.channels = atlas_ph_channels,
	270	.num_channels = 3,
	271	.data_reg = ATLAS_REG_PH_DATA,
	272	.calibration = &atlas_check_ph_calibration,
02112260	273	.delay = ATLAS_PH_INT_TIME_IN_MS,
7103b99b	274	},
e8dd92bf MR	275	[ATLAS_EC_SM] = {
	276	.channels = atlas_ec_channels,
	277	.num_channels = 5,
	278	.data_reg = ATLAS_REG_EC_DATA,
	279	.calibration = &atlas_check_ec_calibration,
02112260	280	.delay = ATLAS_EC_INT_TIME_IN_MS,
e8dd92bf	281	},
ce08cc98 MR	282	[ATLAS_ORP_SM] = {
	283	.channels = atlas_orp_channels,
	284	.num_channels = 2,
	285	.data_reg = ATLAS_REG_ORP_DATA,
	286	.calibration = &atlas_check_orp_calibration,
02112260	287	.delay = ATLAS_ORP_INT_TIME_IN_MS,
ce08cc98	288	},
7103b99b MR	289	};
7103b99b MR	290
27dec00e MR	291	static int atlas_set_powermode(struct atlas_data *data, int on)
	292	{
	293	return regmap_write(data->regmap, ATLAS_REG_PWR_CONTROL, on);
	294	}
	295
	296	static int atlas_set_interrupt(struct atlas_data *data, bool state)
	297	{
	298	return regmap_update_bits(data->regmap, ATLAS_REG_INT_CONTROL,
	299	ATLAS_REG_INT_CONTROL_EN,
	300	state ? ATLAS_REG_INT_CONTROL_EN : 0);
	301	}
	302
	303	static int atlas_buffer_postenable(struct iio_dev *indio_dev)
	304	{
	305	struct atlas_data *data = iio_priv(indio_dev);
	306	int ret;
	307
	308	ret = iio_triggered_buffer_postenable(indio_dev);
	309	if (ret)
	310	return ret;
	311
	312	ret = pm_runtime_get_sync(&data->client->dev);
	313	if (ret < 0) {
	314	pm_runtime_put_noidle(&data->client->dev);
	315	return ret;
	316	}
	317
	318	return atlas_set_interrupt(data, true);
	319	}
	320
	321	static int atlas_buffer_predisable(struct iio_dev *indio_dev)
	322	{
	323	struct atlas_data *data = iio_priv(indio_dev);
	324	int ret;
	325
	326	ret = iio_triggered_buffer_predisable(indio_dev);
	327	if (ret)
	328	return ret;
	329
	330	ret = atlas_set_interrupt(data, false);
	331	if (ret)
	332	return ret;
	333
	334	pm_runtime_mark_last_busy(&data->client->dev);
	335	return pm_runtime_put_autosuspend(&data->client->dev);
	336	}
	337
	338	static const struct iio_trigger_ops atlas_interrupt_trigger_ops = {
27dec00e MR	339	};
	340
	341	static const struct iio_buffer_setup_ops atlas_buffer_setup_ops = {
	342	.postenable = atlas_buffer_postenable,
	343	.predisable = atlas_buffer_predisable,
	344	};
	345
	346	static void atlas_work_handler(struct irq_work *work)
	347	{
	348	struct atlas_data *data = container_of(work, struct atlas_data, work);
	349
	350	iio_trigger_poll(data->trig);
	351	}
	352
	353	static irqreturn_t atlas_trigger_handler(int irq, void *private)
	354	{
	355	struct iio_poll_func *pf = private;
	356	struct iio_dev *indio_dev = pf->indio_dev;
	357	struct atlas_data *data = iio_priv(indio_dev);
	358	int ret;
	359
7103b99b MR	360	ret = regmap_bulk_read(data->regmap, data->chip->data_reg,
	361	(u8 *) &data->buffer,
	362	sizeof(__be32) * (data->chip->num_channels - 2));
27dec00e	363
98e55e93	364	if (!ret)
27dec00e	365	iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
bc2b7dab	366	iio_get_time_ns(indio_dev));
27dec00e MR	367
	368	iio_trigger_notify_done(indio_dev->trig);
	369
	370	return IRQ_HANDLED;
	371	}
	372
	373	static irqreturn_t atlas_interrupt_handler(int irq, void *private)
	374	{
	375	struct iio_dev *indio_dev = private;
	376	struct atlas_data *data = iio_priv(indio_dev);
	377
	378	irq_work_queue(&data->work);
	379
	380	return IRQ_HANDLED;
	381	}
	382
7103b99b	383	static int atlas_read_measurement(struct atlas_data data, int reg, __be32 val)
27dec00e MR	384	{
	385	struct device *dev = &data->client->dev;
	386	int suspended = pm_runtime_suspended(dev);
	387	int ret;
	388
	389	ret = pm_runtime_get_sync(dev);
	390	if (ret < 0) {
	391	pm_runtime_put_noidle(dev);
	392	return ret;
	393	}
	394
	395	if (suspended)
02112260	396	msleep(data->chip->delay);
27dec00e	397
7103b99b	398	ret = regmap_bulk_read(data->regmap, reg, (u8 ) val, sizeof(val));
27dec00e MR	399
	400	pm_runtime_mark_last_busy(dev);
	401	pm_runtime_put_autosuspend(dev);
	402
	403	return ret;
	404	}
	405
	406	static int atlas_read_raw(struct iio_dev *indio_dev,
	407	struct iio_chan_spec const *chan,
	408	int val, int val2, long mask)
	409	{
	410	struct atlas_data *data = iio_priv(indio_dev);
	411
	412	switch (mask) {
	413	case IIO_CHAN_INFO_RAW: {
	414	int ret;
	415	__be32 reg;
	416
	417	switch (chan->type) {
	418	case IIO_TEMP:
	419	ret = regmap_bulk_read(data->regmap, chan->address,
	420	(u8 *) &reg, sizeof(reg));
	421	break;
	422	case IIO_PH:
e8dd92bf MR	423	case IIO_CONCENTRATION:
e8dd92bf MR	424	case IIO_ELECTRICALCONDUCTIVITY:
ce08cc98	425	case IIO_VOLTAGE:
b015b3e3 MR	426	ret = iio_device_claim_direct_mode(indio_dev);
	427	if (ret)
	428	return ret;
27dec00e	429
b015b3e3	430	ret = atlas_read_measurement(data, chan->address, &reg);
27dec00e	431
b015b3e3	432	iio_device_release_direct_mode(indio_dev);
27dec00e MR	433	break;
	434	default:
	435	ret = -EINVAL;
	436	}
	437
	438	if (!ret) {
	439	*val = be32_to_cpu(reg);
	440	ret = IIO_VAL_INT;
	441	}
	442	return ret;
	443	}
	444	case IIO_CHAN_INFO_SCALE:
	445	switch (chan->type) {
	446	case IIO_TEMP:
0808831d MR	447	*val = 10;
0808831d MR	448	return IIO_VAL_INT;
27dec00e MR	449	case IIO_PH:
	450	val = 1; / 0.001 */
	451	*val2 = 1000;
	452	break;
e8dd92bf MR	453	case IIO_ELECTRICALCONDUCTIVITY:
e8dd92bf MR	454	val = 1; / 0.00001 */
ca64d4bc	455	*val2 = 100000;
e8dd92bf MR	456	break;
	457	case IIO_CONCENTRATION:
	458	val = 0; / 0.000000001 */
	459	*val2 = 1000;
	460	return IIO_VAL_INT_PLUS_NANO;
ce08cc98 MR	461	case IIO_VOLTAGE:
	462	val = 1; / 0.1 */
	463	*val2 = 10;
	464	break;
27dec00e MR	465	default:
	466	return -EINVAL;
	467	}
	468	return IIO_VAL_FRACTIONAL;
	469	}
	470
	471	return -EINVAL;
	472	}
	473
	474	static int atlas_write_raw(struct iio_dev *indio_dev,
	475	struct iio_chan_spec const *chan,
	476	int val, int val2, long mask)
	477	{
	478	struct atlas_data *data = iio_priv(indio_dev);
0808831d	479	__be32 reg = cpu_to_be32(val / 10);
27dec00e MR	480
	481	if (val2 != 0 \|\| val < 0 \|\| val > 20000)
	482	return -EINVAL;
	483
	484	if (mask != IIO_CHAN_INFO_RAW \|\| chan->type != IIO_TEMP)
	485	return -EINVAL;
	486
	487	return regmap_bulk_write(data->regmap, chan->address,
	488	&reg, sizeof(reg));
	489	}
	490
	491	static const struct iio_info atlas_info = {
27dec00e MR	492	.read_raw = atlas_read_raw,
	493	.write_raw = atlas_write_raw,
	494	};
	495
7103b99b MR	496	static const struct i2c_device_id atlas_id[] = {
7103b99b MR	497	{ "atlas-ph-sm", ATLAS_PH_SM},
e8dd92bf	498	{ "atlas-ec-sm", ATLAS_EC_SM},
ce08cc98	499	{ "atlas-orp-sm", ATLAS_ORP_SM},
7103b99b MR	500	{}
	501	};
	502	MODULE_DEVICE_TABLE(i2c, atlas_id);
27dec00e	503
7103b99b MR	504	static const struct of_device_id atlas_dt_ids[] = {
7103b99b MR	505	{ .compatible = "atlas,ph-sm", .data = (void *)ATLAS_PH_SM, },
e8dd92bf	506	{ .compatible = "atlas,ec-sm", .data = (void *)ATLAS_EC_SM, },
ce08cc98	507	{ .compatible = "atlas,orp-sm", .data = (void *)ATLAS_ORP_SM, },
7103b99b	508	{ }
27dec00e	509	};
7103b99b	510	MODULE_DEVICE_TABLE(of, atlas_dt_ids);
27dec00e MR	511
	512	static int atlas_probe(struct i2c_client *client,
	513	const struct i2c_device_id *id)
	514	{
	515	struct atlas_data *data;
7103b99b MR	516	struct atlas_device *chip;
7103b99b MR	517	const struct of_device_id *of_id;
27dec00e MR	518	struct iio_trigger *trig;
	519	struct iio_dev *indio_dev;
	520	int ret;
	521
	522	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
	523	if (!indio_dev)
	524	return -ENOMEM;
	525
7103b99b MR	526	of_id = of_match_device(atlas_dt_ids, &client->dev);
	527	if (!of_id)
	528	chip = &atlas_devices[id->driver_data];
	529	else
	530	chip = &atlas_devices[(unsigned long)of_id->data];
	531
27dec00e MR	532	indio_dev->info = &atlas_info;
27dec00e MR	533	indio_dev->name = ATLAS_DRV_NAME;
7103b99b MR	534	indio_dev->channels = chip->channels;
7103b99b MR	535	indio_dev->num_channels = chip->num_channels;
27dec00e MR	536	indio_dev->modes = INDIO_BUFFER_SOFTWARE \| INDIO_DIRECT_MODE;
	537	indio_dev->dev.parent = &client->dev;
	538
	539	trig = devm_iio_trigger_alloc(&client->dev, "%s-dev%d",
	540	indio_dev->name, indio_dev->id);
	541
	542	if (!trig)
	543	return -ENOMEM;
	544
	545	data = iio_priv(indio_dev);
	546	data->client = client;
	547	data->trig = trig;
7103b99b	548	data->chip = chip;
27dec00e MR	549	trig->dev.parent = indio_dev->dev.parent;
	550	trig->ops = &atlas_interrupt_trigger_ops;
	551	iio_trigger_set_drvdata(trig, indio_dev);
	552
	553	i2c_set_clientdata(client, indio_dev);
	554
	555	data->regmap = devm_regmap_init_i2c(client, &atlas_regmap_config);
	556	if (IS_ERR(data->regmap)) {
	557	dev_err(&client->dev, "regmap initialization failed\n");
	558	return PTR_ERR(data->regmap);
	559	}
	560
	561	ret = pm_runtime_set_active(&client->dev);
	562	if (ret)
	563	return ret;
	564
	565	if (client->irq <= 0) {
	566	dev_err(&client->dev, "no valid irq defined\n");
	567	return -EINVAL;
	568	}
	569
7103b99b	570	ret = chip->calibration(data);
27dec00e MR	571	if (ret)
	572	return ret;
	573
	574	ret = iio_trigger_register(trig);
	575	if (ret) {
	576	dev_err(&client->dev, "failed to register trigger\n");
	577	return ret;
	578	}
	579
	580	ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
	581	&atlas_trigger_handler, &atlas_buffer_setup_ops);
	582	if (ret) {
	583	dev_err(&client->dev, "cannot setup iio trigger\n");
	584	goto unregister_trigger;
	585	}
	586
	587	init_irq_work(&data->work, atlas_work_handler);
	588
	589	/* interrupt pin toggles on new conversion */
	590	ret = devm_request_threaded_irq(&client->dev, client->irq,
	591	NULL, atlas_interrupt_handler,
	592	IRQF_TRIGGER_RISING \|
	593	IRQF_TRIGGER_FALLING \| IRQF_ONESHOT,
	594	"atlas_irq",
	595	indio_dev);
	596	if (ret) {
	597	dev_err(&client->dev, "request irq (%d) failed\n", client->irq);
	598	goto unregister_buffer;
	599	}
	600
	601	ret = atlas_set_powermode(data, 1);
	602	if (ret) {
	603	dev_err(&client->dev, "cannot power device on");
	604	goto unregister_buffer;
	605	}
	606
	607	pm_runtime_enable(&client->dev);
	608	pm_runtime_set_autosuspend_delay(&client->dev, 2500);
	609	pm_runtime_use_autosuspend(&client->dev);
	610
	611	ret = iio_device_register(indio_dev);
	612	if (ret) {
	613	dev_err(&client->dev, "unable to register device\n");
	614	goto unregister_pm;
	615	}
	616
	617	return 0;
	618
	619	unregister_pm:
	620	pm_runtime_disable(&client->dev);
	621	atlas_set_powermode(data, 0);
	622
	623	unregister_buffer:
	624	iio_triggered_buffer_cleanup(indio_dev);
	625
	626	unregister_trigger:
	627	iio_trigger_unregister(data->trig);
	628
	629	return ret;
	630	}
	631
	632	static int atlas_remove(struct i2c_client *client)
	633	{
	634	struct iio_dev *indio_dev = i2c_get_clientdata(client);
635	struct atlas_data *data = iio_priv(indio_dev);
636
637	iio_device_unregister(indio_dev);
638	iio_triggered_buffer_cleanup(indio_dev);
639	iio_trigger_unregister(data->trig);
640
641	pm_runtime_disable(&client->dev);
642	pm_runtime_set_suspended(&client->dev);
643	pm_runtime_put_noidle(&client->dev);
644
645	return atlas_set_powermode(data, 0);
646	}
647
648	#ifdef CONFIG_PM
649	static int atlas_runtime_suspend(struct device *dev)
650	{
651	struct atlas_data *data =
652	iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
653
654	return atlas_set_powermode(data, 0);
655	}
656
657	static int atlas_runtime_resume(struct device *dev)
658	{
659	struct atlas_data *data =
660	iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
661
662	return atlas_set_powermode(data, 1);
663	}
664	#endif
665
666	static const struct dev_pm_ops atlas_pm_ops = {
667	SET_RUNTIME_PM_OPS(atlas_runtime_suspend,
668	atlas_runtime_resume, NULL)
669	};
670
27dec00e MR	671	static struct i2c_driver atlas_driver = {
	672	.driver = {
	673	.name = ATLAS_DRV_NAME,
	674	.of_match_table = of_match_ptr(atlas_dt_ids),
	675	.pm = &atlas_pm_ops,
	676	},
	677	.probe = atlas_probe,
	678	.remove = atlas_remove,
	679	.id_table = atlas_id,
	680	};
	681	module_i2c_driver(atlas_driver);
	682
d6ad8058	683	MODULE_AUTHOR("Matt Ranostay <[email protected]>");
27dec00e MR	684	MODULE_DESCRIPTION("Atlas Scientific pH-SM sensor");
27dec00e MR	685	MODULE_LICENSE("GPL");