[linux-block.git] / drivers / iio / adc / ad7476.c

/*
 * AD7466/7/8 AD7476/5/7/8 (A) SPI ADC driver
 *
 * Copyright 2010 Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later.
 */

#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <linux/spi/spi.h>
#include <linux/regulator/consumer.h>
#include <linux/err.h>
#include <linux/module.h>

#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/buffer.h>
#include <linux/iio/trigger_consumer.h>
#include <linux/iio/triggered_buffer.h>

#define RES_MASK(bits)	((1 << (bits)) - 1)

struct ad7476_state;

struct ad7476_chip_info {
	unsigned int			int_vref_uv;
	struct iio_chan_spec		channel[2];
	void (*reset)(struct ad7476_state *);
};

struct ad7476_state {
	struct spi_device		*spi;
	const struct ad7476_chip_info	*chip_info;
	struct regulator		*reg;
	struct spi_transfer		xfer;
	struct spi_message		msg;
	/*
	 * DMA (thus cache coherency maintenance) requires the
	 * transfer buffers to live in their own cache lines.
	 * Make the buffer large enough for one 16 bit sample and one 64 bit
	 * aligned 64 bit timestamp.
	 */
	unsigned char data[ALIGN(2, sizeof(s64)) + sizeof(s64)]
			____cacheline_aligned;
};

enum ad7476_supported_device_ids {
	ID_AD7091R,
	ID_AD7276,
	ID_AD7277,
	ID_AD7278,
	ID_AD7466,
	ID_AD7467,
	ID_AD7468,
	ID_AD7495,
	ID_AD7940,
};

static irqreturn_t ad7476_trigger_handler(int irq, void  *p)
{
	struct iio_poll_func *pf = p;
	struct iio_dev *indio_dev = pf->indio_dev;
	struct ad7476_state *st = iio_priv(indio_dev);
	s64 time_ns;
	int b_sent;

	b_sent = spi_sync(st->spi, &st->msg);
	if (b_sent < 0)
		goto done;

	time_ns = iio_get_time_ns();

	if (indio_dev->scan_timestamp)
		((s64 *)st->data)[1] = time_ns;

	iio_push_to_buffers(indio_dev, st->data);
done:
	iio_trigger_notify_done(indio_dev->trig);

	return IRQ_HANDLED;
}

static void ad7091_reset(struct ad7476_state *st)
{
	/* Any transfers with 8 scl cycles will reset the device */
	spi_read(st->spi, st->data, 1);
}

static int ad7476_scan_direct(struct ad7476_state *st)
{
	int ret;

	ret = spi_sync(st->spi, &st->msg);
	if (ret)
		return ret;

	return be16_to_cpup((__be16 *)st->data);
}

static int ad7476_read_raw(struct iio_dev *indio_dev,
			   struct iio_chan_spec const *chan,
			   int *val,
			   int *val2,
			   long m)
{
	int ret;
	struct ad7476_state *st = iio_priv(indio_dev);
	int scale_uv;

	switch (m) {
	case IIO_CHAN_INFO_RAW:
		mutex_lock(&indio_dev->mlock);
		if (iio_buffer_enabled(indio_dev))
			ret = -EBUSY;
		else
			ret = ad7476_scan_direct(st);
		mutex_unlock(&indio_dev->mlock);

		if (ret < 0)
			return ret;
		*val = (ret >> st->chip_info->channel[0].scan_type.shift) &
			RES_MASK(st->chip_info->channel[0].scan_type.realbits);
		return IIO_VAL_INT;
	case IIO_CHAN_INFO_SCALE:
		if (!st->chip_info->int_vref_uv) {
			scale_uv = regulator_get_voltage(st->reg);
			if (scale_uv < 0)
				return scale_uv;
		} else {
			scale_uv = st->chip_info->int_vref_uv;
		}
		scale_uv >>= chan->scan_type.realbits;
		*val =  scale_uv / 1000;
		*val2 = (scale_uv % 1000) * 1000;
		return IIO_VAL_INT_PLUS_MICRO;
	}
	return -EINVAL;
}

#define _AD7476_CHAN(bits, _shift, _info_mask_sep)		\
	{							\
	.type = IIO_VOLTAGE,					\
	.indexed = 1,						\
	.info_mask_separate = _info_mask_sep,			\
	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),	\
	.scan_type = {						\
		.sign = 'u',					\
		.realbits = (bits),				\
		.storagebits = 16,				\
		.shift = (_shift),				\
		.endianness = IIO_BE,				\
	},							\
}

#define AD7476_CHAN(bits) _AD7476_CHAN((bits), 13 - (bits), \
		BIT(IIO_CHAN_INFO_RAW))
#define AD7940_CHAN(bits) _AD7476_CHAN((bits), 15 - (bits), \
		BIT(IIO_CHAN_INFO_RAW))
#define AD7091R_CHAN(bits) _AD7476_CHAN((bits), 16 - (bits), 0)

static const struct ad7476_chip_info ad7476_chip_info_tbl[] = {
	[ID_AD7091R] = {
		.channel[0] = AD7091R_CHAN(12),
		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
		.reset = ad7091_reset,
	},
	[ID_AD7276] = {
		.channel[0] = AD7940_CHAN(12),
		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
	},
	[ID_AD7277] = {
		.channel[0] = AD7940_CHAN(10),
		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
	},
	[ID_AD7278] = {
		.channel[0] = AD7940_CHAN(8),
		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
	},
	[ID_AD7466] = {
		.channel[0] = AD7476_CHAN(12),
		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
	},
	[ID_AD7467] = {
		.channel[0] = AD7476_CHAN(10),
		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
	},
	[ID_AD7468] = {
		.channel[0] = AD7476_CHAN(8),
		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
	},
	[ID_AD7495] = {
		.channel[0] = AD7476_CHAN(12),
		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
		.int_vref_uv = 2500000,
	},
	[ID_AD7940] = {
		.channel[0] = AD7940_CHAN(14),
		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
	},
};

static const struct iio_info ad7476_info = {
	.driver_module = THIS_MODULE,
	.read_raw = &ad7476_read_raw,
};

static int ad7476_probe(struct spi_device *spi)
{
	struct ad7476_state *st;
	struct iio_dev *indio_dev;
	int ret;

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

	st = iio_priv(indio_dev);
	st->chip_info =
		&ad7476_chip_info_tbl[spi_get_device_id(spi)->driver_data];

	st->reg = devm_regulator_get(&spi->dev, "vcc");
	if (IS_ERR(st->reg))
		return PTR_ERR(st->reg);

	ret = regulator_enable(st->reg);
	if (ret)
		return ret;

	spi_set_drvdata(spi, indio_dev);

	st->spi = spi;

	/* Establish that the iio_dev is a child of the spi device */
	indio_dev->dev.parent = &spi->dev;
	indio_dev->name = spi_get_device_id(spi)->name;
	indio_dev->modes = INDIO_DIRECT_MODE;
	indio_dev->channels = st->chip_info->channel;
	indio_dev->num_channels = 2;
	indio_dev->info = &ad7476_info;
	/* Setup default message */

	st->xfer.rx_buf = &st->data;
	st->xfer.len = st->chip_info->channel[0].scan_type.storagebits / 8;

	spi_message_init(&st->msg);
	spi_message_add_tail(&st->xfer, &st->msg);

	ret = iio_triggered_buffer_setup(indio_dev, NULL,
			&ad7476_trigger_handler, NULL);
	if (ret)
		goto error_disable_reg;

	if (st->chip_info->reset)
		st->chip_info->reset(st);

	ret = iio_device_register(indio_dev);
	if (ret)
		goto error_ring_unregister;
	return 0;

error_ring_unregister:
	iio_triggered_buffer_cleanup(indio_dev);
error_disable_reg:
	regulator_disable(st->reg);

	return ret;
}

static int ad7476_remove(struct spi_device *spi)
{
	struct iio_dev *indio_dev = spi_get_drvdata(spi);
	struct ad7476_state *st = iio_priv(indio_dev);

	iio_device_unregister(indio_dev);
	iio_triggered_buffer_cleanup(indio_dev);
	regulator_disable(st->reg);

	return 0;
}

static const struct spi_device_id ad7476_id[] = {
	{"ad7091r", ID_AD7091R},
	{"ad7273", ID_AD7277},
	{"ad7274", ID_AD7276},
	{"ad7276", ID_AD7276},
	{"ad7277", ID_AD7277},
	{"ad7278", ID_AD7278},
	{"ad7466", ID_AD7466},
	{"ad7467", ID_AD7467},
	{"ad7468", ID_AD7468},
	{"ad7475", ID_AD7466},
	{"ad7476", ID_AD7466},
	{"ad7476a", ID_AD7466},
	{"ad7477", ID_AD7467},
	{"ad7477a", ID_AD7467},
	{"ad7478", ID_AD7468},
	{"ad7478a", ID_AD7468},
	{"ad7495", ID_AD7495},
	{"ad7910", ID_AD7467},
	{"ad7920", ID_AD7466},
	{"ad7940", ID_AD7940},
	{}
};
MODULE_DEVICE_TABLE(spi, ad7476_id);

static struct spi_driver ad7476_driver = {
	.driver = {
		.name	= "ad7476",
		.owner	= THIS_MODULE,
	},
	.probe		= ad7476_probe,
	.remove		= ad7476_remove,
	.id_table	= ad7476_id,
};
module_spi_driver(ad7476_driver);

MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
MODULE_DESCRIPTION("Analog Devices AD7476 and similar 1-channel ADCs");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
349282d8 MH	1	/*
	2	* AD7466/7/8 AD7476/5/7/8 (A) SPI ADC driver
	3	*
	4	* Copyright 2010 Analog Devices Inc.
	5	*
	6	* Licensed under the GPL-2 or later.
	7	*/
	8
349282d8 MH	9	#include <linux/device.h>
	10	#include <linux/kernel.h>
	11	#include <linux/slab.h>
	12	#include <linux/sysfs.h>
349282d8 MH	13	#include <linux/spi/spi.h>
	14	#include <linux/regulator/consumer.h>
	15	#include <linux/err.h>
99c97852	16	#include <linux/module.h>
349282d8	17
06458e27 JC	18	#include <linux/iio/iio.h>
	19	#include <linux/iio/sysfs.h>
	20	#include <linux/iio/buffer.h>
7a28fe3c LPC	21	#include <linux/iio/trigger_consumer.h>
7a28fe3c LPC	22	#include <linux/iio/triggered_buffer.h>
349282d8	23
7a28fe3c LPC	24	#define RES_MASK(bits) ((1 << (bits)) - 1)
7a28fe3c LPC	25
87c5b10f LPC	26	struct ad7476_state;
87c5b10f LPC	27
7a28fe3c LPC	28	struct ad7476_chip_info {
	29	unsigned int int_vref_uv;
	30	struct iio_chan_spec channel[2];
87c5b10f	31	void (reset)(struct ad7476_state );
7a28fe3c LPC	32	};
	33
	34	struct ad7476_state {
	35	struct spi_device *spi;
	36	const struct ad7476_chip_info *chip_info;
	37	struct regulator *reg;
	38	struct spi_transfer xfer;
	39	struct spi_message msg;
	40	/*
	41	* DMA (thus cache coherency maintenance) requires the
	42	* transfer buffers to live in their own cache lines.
	43	* Make the buffer large enough for one 16 bit sample and one 64 bit
	44	* aligned 64 bit timestamp.
	45	*/
	46	unsigned char data[ALIGN(2, sizeof(s64)) + sizeof(s64)]
	47	____cacheline_aligned;
	48	};
	49
	50	enum ad7476_supported_device_ids {
87c5b10f	51	ID_AD7091R,
c26cc89e LPC	52	ID_AD7276,
	53	ID_AD7277,
	54	ID_AD7278,
7a28fe3c LPC	55	ID_AD7466,
	56	ID_AD7467,
	57	ID_AD7468,
4c337de8 LPC	58	ID_AD7495,
4c337de8 LPC	59	ID_AD7940,
7a28fe3c LPC	60	};
	61
	62	static irqreturn_t ad7476_trigger_handler(int irq, void *p)
	63	{
	64	struct iio_poll_func *pf = p;
	65	struct iio_dev *indio_dev = pf->indio_dev;
	66	struct ad7476_state *st = iio_priv(indio_dev);
	67	s64 time_ns;
	68	int b_sent;
	69
	70	b_sent = spi_sync(st->spi, &st->msg);
	71	if (b_sent < 0)
	72	goto done;
	73
	74	time_ns = iio_get_time_ns();
	75
	76	if (indio_dev->scan_timestamp)
	77	((s64 *)st->data)[1] = time_ns;
	78
84b36ce5	79	iio_push_to_buffers(indio_dev, st->data);
7a28fe3c LPC	80	done:
	81	iio_trigger_notify_done(indio_dev->trig);
	82
	83	return IRQ_HANDLED;
	84	}
349282d8	85
87c5b10f LPC	86	static void ad7091_reset(struct ad7476_state *st)
	87	{
	88	/* Any transfers with 8 scl cycles will reset the device */
	89	spi_read(st->spi, st->data, 1);
	90	}
	91
349282d8 MH	92	static int ad7476_scan_direct(struct ad7476_state *st)
349282d8 MH	93	{
349282d8 MH	94	int ret;
349282d8 MH	95
668413e9	96	ret = spi_sync(st->spi, &st->msg);
349282d8 MH	97	if (ret)
	98	return ret;
	99
610a407c	100	return be16_to_cpup((__be16 *)st->data);
349282d8 MH	101	}
349282d8 MH	102
84f79ecb	103	static int ad7476_read_raw(struct iio_dev *indio_dev,
c5e0819e JC	104	struct iio_chan_spec const *chan,
	105	int *val,
	106	int *val2,
	107	long m)
349282d8	108	{
349282d8	109	int ret;
84f79ecb	110	struct ad7476_state *st = iio_priv(indio_dev);
cb093e44	111	int scale_uv;
c5e0819e JC	112
c5e0819e JC	113	switch (m) {
b11f98ff	114	case IIO_CHAN_INFO_RAW:
84f79ecb JC	115	mutex_lock(&indio_dev->mlock);
84f79ecb JC	116	if (iio_buffer_enabled(indio_dev))
78c32ed3	117	ret = -EBUSY;
c5e0819e JC	118	else
c5e0819e JC	119	ret = ad7476_scan_direct(st);
84f79ecb	120	mutex_unlock(&indio_dev->mlock);
c5e0819e JC	121
	122	if (ret < 0)
	123	return ret;
	124	*val = (ret >> st->chip_info->channel[0].scan_type.shift) &
	125	RES_MASK(st->chip_info->channel[0].scan_type.realbits);
	126	return IIO_VAL_INT;
c8a9f805	127	case IIO_CHAN_INFO_SCALE:
cb093e44 LPC	128	if (!st->chip_info->int_vref_uv) {
	129	scale_uv = regulator_get_voltage(st->reg);
	130	if (scale_uv < 0)
	131	return scale_uv;
	132	} else {
	133	scale_uv = st->chip_info->int_vref_uv;
	134	}
	135	scale_uv >>= chan->scan_type.realbits;
	136	*val = scale_uv / 1000;
	137	val2 = (scale_uv % 1000) 1000;
c5e0819e JC	138	return IIO_VAL_INT_PLUS_MICRO;
	139	}
	140	return -EINVAL;
349282d8	141	}
349282d8	142
8c1033f7	143	#define _AD7476_CHAN(bits, _shift, _info_mask_sep) \
85871cd8 JC	144	{ \
	145	.type = IIO_VOLTAGE, \
	146	.indexed = 1, \
8c1033f7 JC	147	.info_mask_separate = _info_mask_sep, \
8c1033f7 JC	148	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
85871cd8 JC	149	.scan_type = { \
85871cd8 JC	150	.sign = 'u', \
4c337de8	151	.realbits = (bits), \
85871cd8	152	.storagebits = 16, \
4c337de8 LPC	153	.shift = (_shift), \
4c337de8 LPC	154	.endianness = IIO_BE, \
85871cd8 JC	155	}, \
	156	}
	157
87c5b10f	158	#define AD7476_CHAN(bits) _AD7476_CHAN((bits), 13 - (bits), \
8c1033f7	159	BIT(IIO_CHAN_INFO_RAW))
87c5b10f	160	#define AD7940_CHAN(bits) _AD7476_CHAN((bits), 15 - (bits), \
8c1033f7	161	BIT(IIO_CHAN_INFO_RAW))
87c5b10f	162	#define AD7091R_CHAN(bits) _AD7476_CHAN((bits), 16 - (bits), 0)
4c337de8	163
349282d8	164	static const struct ad7476_chip_info ad7476_chip_info_tbl[] = {
87c5b10f LPC	165	[ID_AD7091R] = {
	166	.channel[0] = AD7091R_CHAN(12),
	167	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
	168	.reset = ad7091_reset,
	169	},
c26cc89e LPC	170	[ID_AD7276] = {
	171	.channel[0] = AD7940_CHAN(12),
	172	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
	173	},
	174	[ID_AD7277] = {
	175	.channel[0] = AD7940_CHAN(10),
	176	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
	177	},
	178	[ID_AD7278] = {
	179	.channel[0] = AD7940_CHAN(8),
	180	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
	181	},
349282d8	182	[ID_AD7466] = {
85871cd8	183	.channel[0] = AD7476_CHAN(12),
c5e0819e	184	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
349282d8 MH	185	},
349282d8 MH	186	[ID_AD7467] = {
85871cd8	187	.channel[0] = AD7476_CHAN(10),
c5e0819e	188	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
349282d8 MH	189	},
349282d8 MH	190	[ID_AD7468] = {
85871cd8	191	.channel[0] = AD7476_CHAN(8),
c5e0819e	192	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
349282d8	193	},
349282d8	194	[ID_AD7495] = {
85871cd8	195	.channel[0] = AD7476_CHAN(12),
c5e0819e	196	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
cb093e44	197	.int_vref_uv = 2500000,
349282d8	198	},
4c337de8 LPC	199	[ID_AD7940] = {
	200	.channel[0] = AD7940_CHAN(14),
	201	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
	202	},
349282d8 MH	203	};
349282d8 MH	204
6fe8135f JC	205	static const struct iio_info ad7476_info = {
	206	.driver_module = THIS_MODULE,
	207	.read_raw = &ad7476_read_raw,
	208	};
	209
fc52692c	210	static int ad7476_probe(struct spi_device *spi)
349282d8	211	{
349282d8	212	struct ad7476_state *st;
67688105	213	struct iio_dev *indio_dev;
cb093e44	214	int ret;
349282d8	215
4ea454d2 SK	216	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
	217	if (!indio_dev)
	218	return -ENOMEM;
	219
67688105	220	st = iio_priv(indio_dev);
349282d8 MH	221	st->chip_info =
	222	&ad7476_chip_info_tbl[spi_get_device_id(spi)->driver_data];
	223
4ea454d2 SK	224	st->reg = devm_regulator_get(&spi->dev, "vcc");
	225	if (IS_ERR(st->reg))
	226	return PTR_ERR(st->reg);
cb093e44 LPC	227
	228	ret = regulator_enable(st->reg);
	229	if (ret)
4ea454d2	230	return ret;
349282d8	231
38f71aa9	232	spi_set_drvdata(spi, indio_dev);
349282d8	233
349282d8 MH	234	st->spi = spi;
349282d8 MH	235
ae639830	236	/* Establish that the iio_dev is a child of the spi device */
67688105 JC	237	indio_dev->dev.parent = &spi->dev;
	238	indio_dev->name = spi_get_device_id(spi)->name;
	239	indio_dev->modes = INDIO_DIRECT_MODE;
	240	indio_dev->channels = st->chip_info->channel;
	241	indio_dev->num_channels = 2;
	242	indio_dev->info = &ad7476_info;
349282d8 MH	243	/* Setup default message */
	244
	245	st->xfer.rx_buf = &st->data;
c5e0819e	246	st->xfer.len = st->chip_info->channel[0].scan_type.storagebits / 8;
349282d8 MH	247
	248	spi_message_init(&st->msg);
	249	spi_message_add_tail(&st->xfer, &st->msg);
	250
7a28fe3c LPC	251	ret = iio_triggered_buffer_setup(indio_dev, NULL,
7a28fe3c LPC	252	&ad7476_trigger_handler, NULL);
349282d8	253	if (ret)
67688105	254	goto error_disable_reg;
349282d8	255
87c5b10f LPC	256	if (st->chip_info->reset)
	257	st->chip_info->reset(st);
	258
26d25ae3 JC	259	ret = iio_device_register(indio_dev);
	260	if (ret)
	261	goto error_ring_unregister;
349282d8 MH	262	return 0;
349282d8 MH	263
26d25ae3	264	error_ring_unregister:
7a28fe3c	265	iio_triggered_buffer_cleanup(indio_dev);
349282d8	266	error_disable_reg:
cb093e44	267	regulator_disable(st->reg);
26d25ae3	268
349282d8 MH	269	return ret;
	270	}
	271
fc52692c	272	static int ad7476_remove(struct spi_device *spi)
349282d8	273	{
67688105 JC	274	struct iio_dev *indio_dev = spi_get_drvdata(spi);
67688105 JC	275	struct ad7476_state *st = iio_priv(indio_dev);
67688105	276
d2fffd6c	277	iio_device_unregister(indio_dev);
7a28fe3c	278	iio_triggered_buffer_cleanup(indio_dev);
cb093e44	279	regulator_disable(st->reg);
67688105	280
349282d8 MH	281	return 0;
	282	}
	283
	284	static const struct spi_device_id ad7476_id[] = {
87c5b10f	285	{"ad7091r", ID_AD7091R},
c26cc89e LPC	286	{"ad7273", ID_AD7277},
	287	{"ad7274", ID_AD7276},
	288	{"ad7276", ID_AD7276},
	289	{"ad7277", ID_AD7277},
	290	{"ad7278", ID_AD7278},
349282d8 MH	291	{"ad7466", ID_AD7466},
	292	{"ad7467", ID_AD7467},
	293	{"ad7468", ID_AD7468},
fcc7800b LPC	294	{"ad7475", ID_AD7466},
	295	{"ad7476", ID_AD7466},
	296	{"ad7476a", ID_AD7466},
	297	{"ad7477", ID_AD7467},
	298	{"ad7477a", ID_AD7467},
	299	{"ad7478", ID_AD7468},
	300	{"ad7478a", ID_AD7468},
349282d8	301	{"ad7495", ID_AD7495},
ac5332b1 LPC	302	{"ad7910", ID_AD7467},
ac5332b1 LPC	303	{"ad7920", ID_AD7466},
4c337de8	304	{"ad7940", ID_AD7940},
349282d8 MH	305	{}
349282d8 MH	306	};
55e4390c	307	MODULE_DEVICE_TABLE(spi, ad7476_id);
349282d8 MH	308
	309	static struct spi_driver ad7476_driver = {
	310	.driver = {
	311	.name = "ad7476",
349282d8 MH	312	.owner = THIS_MODULE,
	313	},
	314	.probe = ad7476_probe,
fc52692c	315	.remove = ad7476_remove,
349282d8 MH	316	.id_table = ad7476_id,
349282d8 MH	317	};
ae6ae6fe	318	module_spi_driver(ad7476_driver);
349282d8 MH	319
349282d8 MH	320	MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
ac5332b1	321	MODULE_DESCRIPTION("Analog Devices AD7476 and similar 1-channel ADCs");
349282d8	322	MODULE_LICENSE("GPL v2");