[deliverable/linux.git] / drivers / staging / iio / accel / adis16240_core.c

/*
 * ADIS16240 Programmable Impact Sensor and Recorder driver
 *
 * Copyright 2010 Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later.
 */

#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/gpio.h>
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/spi/spi.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <linux/list.h>
#include <linux/module.h>

#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/buffer.h>
#include <linux/iio/imu/adis.h>

#include "adis16240.h"

static ssize_t adis16240_spi_read_signed(struct device *dev,
					 struct device_attribute *attr,
					 char *buf,
					 unsigned bits)
{
	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
	struct adis *st = iio_priv(indio_dev);
	int ret;
	s16 val = 0;
	unsigned shift = 16 - bits;
	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);

	ret = adis_read_reg_16(st,
			       this_attr->address, (u16 *)&val);
	if (ret)
		return ret;

	if (val & ADIS16240_ERROR_ACTIVE)
		adis_check_status(st);

	val = (s16)(val << shift) >> shift;
	return sprintf(buf, "%d\n", val);
}

static ssize_t adis16240_read_12bit_signed(struct device *dev,
					   struct device_attribute *attr,
					   char *buf)
{
	ssize_t ret;
	struct iio_dev *indio_dev = dev_to_iio_dev(dev);

	/* Take the iio_dev status lock */
	mutex_lock(&indio_dev->mlock);
	ret =  adis16240_spi_read_signed(dev, attr, buf, 12);
	mutex_unlock(&indio_dev->mlock);

	return ret;
}

static IIO_DEVICE_ATTR(in_accel_xyz_squared_peak_raw, S_IRUGO,
		       adis16240_read_12bit_signed, NULL,
		       ADIS16240_XYZPEAK_OUT);

static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("4096");

static const u8 adis16240_addresses[][2] = {
	[ADIS16240_SCAN_ACC_X] = { ADIS16240_XACCL_OFF, ADIS16240_XPEAK_OUT },
	[ADIS16240_SCAN_ACC_Y] = { ADIS16240_YACCL_OFF, ADIS16240_YPEAK_OUT },
	[ADIS16240_SCAN_ACC_Z] = { ADIS16240_ZACCL_OFF, ADIS16240_ZPEAK_OUT },
};

static int adis16240_read_raw(struct iio_dev *indio_dev,
			      struct iio_chan_spec const *chan,
			      int *val, int *val2,
			      long mask)
{
	struct adis *st = iio_priv(indio_dev);
	int ret;
	int bits;
	u8 addr;
	s16 val16;

	switch (mask) {
	case IIO_CHAN_INFO_RAW:
		return adis_single_conversion(indio_dev, chan,
				ADIS16240_ERROR_ACTIVE, val);
	case IIO_CHAN_INFO_SCALE:
		switch (chan->type) {
		case IIO_VOLTAGE:
			if (chan->channel == 0) {
				*val = 4;
				*val2 = 880000; /* 4.88 mV */
				return IIO_VAL_INT_PLUS_MICRO;
			}
			return -EINVAL;
		case IIO_TEMP:
			*val = 244; /* 0.244 C */
			*val2 = 0;
			return IIO_VAL_INT_PLUS_MICRO;
		case IIO_ACCEL:
			*val = 0;
			*val2 = IIO_G_TO_M_S_2(51400); /* 51.4 mg */
			return IIO_VAL_INT_PLUS_MICRO;
		default:
			return -EINVAL;
		}
		break;
	case IIO_CHAN_INFO_PEAK_SCALE:
		*val = 0;
		*val2 = IIO_G_TO_M_S_2(51400); /* 51.4 mg */
		return IIO_VAL_INT_PLUS_MICRO;
	case IIO_CHAN_INFO_OFFSET:
		*val = 25000 / 244 - 0x133; /* 25 C = 0x133 */
		return IIO_VAL_INT;
	case IIO_CHAN_INFO_CALIBBIAS:
		bits = 10;
		mutex_lock(&indio_dev->mlock);
		addr = adis16240_addresses[chan->scan_index][0];
		ret = adis_read_reg_16(st, addr, &val16);
		if (ret) {
			mutex_unlock(&indio_dev->mlock);
			return ret;
		}
		val16 &= (1 << bits) - 1;
		val16 = (s16)(val16 << (16 - bits)) >> (16 - bits);
		*val = val16;
		mutex_unlock(&indio_dev->mlock);
		return IIO_VAL_INT;
	case IIO_CHAN_INFO_PEAK:
		bits = 10;
		mutex_lock(&indio_dev->mlock);
		addr = adis16240_addresses[chan->scan_index][1];
		ret = adis_read_reg_16(st, addr, &val16);
		if (ret) {
			mutex_unlock(&indio_dev->mlock);
			return ret;
		}
		val16 &= (1 << bits) - 1;
		val16 = (s16)(val16 << (16 - bits)) >> (16 - bits);
		*val = val16;
		mutex_unlock(&indio_dev->mlock);
		return IIO_VAL_INT;
	}
	return -EINVAL;
}

static int adis16240_write_raw(struct iio_dev *indio_dev,
			       struct iio_chan_spec const *chan,
			       int val,
			       int val2,
			       long mask)
{
	struct adis *st = iio_priv(indio_dev);
	int bits = 10;
	s16 val16;
	u8 addr;

	switch (mask) {
	case IIO_CHAN_INFO_CALIBBIAS:
		val16 = val & ((1 << bits) - 1);
		addr = adis16240_addresses[chan->scan_index][0];
		return adis_write_reg_16(st, addr, val16);
	}
	return -EINVAL;
}

static const struct iio_chan_spec adis16240_channels[] = {
	ADIS_SUPPLY_CHAN(ADIS16240_SUPPLY_OUT, ADIS16240_SCAN_SUPPLY, 0, 10),
	ADIS_AUX_ADC_CHAN(ADIS16240_AUX_ADC, ADIS16240_SCAN_AUX_ADC, 0, 10),
	ADIS_ACCEL_CHAN(X, ADIS16240_XACCL_OUT, ADIS16240_SCAN_ACC_X,
			BIT(IIO_CHAN_INFO_CALIBBIAS) | BIT(IIO_CHAN_INFO_PEAK),
			0, 10),
	ADIS_ACCEL_CHAN(Y, ADIS16240_YACCL_OUT, ADIS16240_SCAN_ACC_Y,
			BIT(IIO_CHAN_INFO_CALIBBIAS) | BIT(IIO_CHAN_INFO_PEAK),
			0, 10),
	ADIS_ACCEL_CHAN(Z, ADIS16240_ZACCL_OUT, ADIS16240_SCAN_ACC_Z,
			BIT(IIO_CHAN_INFO_CALIBBIAS) | BIT(IIO_CHAN_INFO_PEAK),
			0, 10),
	ADIS_TEMP_CHAN(ADIS16240_TEMP_OUT, ADIS16240_SCAN_TEMP, 0, 10),
	IIO_CHAN_SOFT_TIMESTAMP(6)
};

static struct attribute *adis16240_attributes[] = {
	&iio_dev_attr_in_accel_xyz_squared_peak_raw.dev_attr.attr,
	&iio_const_attr_sampling_frequency_available.dev_attr.attr,
	NULL
};

static const struct attribute_group adis16240_attribute_group = {
	.attrs = adis16240_attributes,
};

static const struct iio_info adis16240_info = {
	.attrs = &adis16240_attribute_group,
	.read_raw = &adis16240_read_raw,
	.write_raw = &adis16240_write_raw,
	.update_scan_mode = adis_update_scan_mode,
	.driver_module = THIS_MODULE,
};

static const char * const adis16240_status_error_msgs[] = {
	[ADIS16240_DIAG_STAT_PWRON_FAIL_BIT] = "Power on, self-test failed",
	[ADIS16240_DIAG_STAT_SPI_FAIL_BIT] = "SPI failure",
	[ADIS16240_DIAG_STAT_FLASH_UPT_BIT] = "Flash update failed",
	[ADIS16240_DIAG_STAT_POWER_HIGH_BIT] = "Power supply above 3.625V",
	[ADIS16240_DIAG_STAT_POWER_LOW_BIT] = "Power supply below 2.225V",
};

static const struct adis_data adis16240_data = {
	.write_delay = 35,
	.read_delay = 35,
	.msc_ctrl_reg = ADIS16240_MSC_CTRL,
	.glob_cmd_reg = ADIS16240_GLOB_CMD,
	.diag_stat_reg = ADIS16240_DIAG_STAT,

	.self_test_mask = ADIS16240_MSC_CTRL_SELF_TEST_EN,
	.startup_delay = ADIS16240_STARTUP_DELAY,

	.status_error_msgs = adis16240_status_error_msgs,
	.status_error_mask = BIT(ADIS16240_DIAG_STAT_PWRON_FAIL_BIT) |
		BIT(ADIS16240_DIAG_STAT_SPI_FAIL_BIT) |
		BIT(ADIS16240_DIAG_STAT_FLASH_UPT_BIT) |
		BIT(ADIS16240_DIAG_STAT_POWER_HIGH_BIT) |
		BIT(ADIS16240_DIAG_STAT_POWER_LOW_BIT),
};

static int adis16240_probe(struct spi_device *spi)
{
	int ret;
	struct adis *st;
	struct iio_dev *indio_dev;

	/* setup the industrialio driver allocated elements */
	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
	if (!indio_dev)
		return -ENOMEM;
	st = iio_priv(indio_dev);
	/* this is only used for removal purposes */
	spi_set_drvdata(spi, indio_dev);

	indio_dev->name = spi->dev.driver->name;
	indio_dev->dev.parent = &spi->dev;
	indio_dev->info = &adis16240_info;
	indio_dev->channels = adis16240_channels;
	indio_dev->num_channels = ARRAY_SIZE(adis16240_channels);
	indio_dev->modes = INDIO_DIRECT_MODE;

	ret = adis_init(st, indio_dev, spi, &adis16240_data);
	if (ret)
		return ret;
	ret = adis_setup_buffer_and_trigger(st, indio_dev, NULL);
	if (ret)
		return ret;

	/* Get the device into a sane initial state */
	ret = adis_initial_startup(st);
	if (ret)
		goto error_cleanup_buffer_trigger;
	ret = iio_device_register(indio_dev);
	if (ret)
		goto error_cleanup_buffer_trigger;
	return 0;

error_cleanup_buffer_trigger:
	adis_cleanup_buffer_and_trigger(st, indio_dev);
	return ret;
}

static int adis16240_remove(struct spi_device *spi)
{
	struct iio_dev *indio_dev = spi_get_drvdata(spi);
	struct adis *st = iio_priv(indio_dev);

	iio_device_unregister(indio_dev);
	adis_cleanup_buffer_and_trigger(st, indio_dev);

	return 0;
}

static struct spi_driver adis16240_driver = {
	.driver = {
		.name = "adis16240",
		.owner = THIS_MODULE,
	},
	.probe = adis16240_probe,
	.remove = adis16240_remove,
};
module_spi_driver(adis16240_driver);

MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
MODULE_DESCRIPTION("Analog Devices Programmable Impact Sensor and Recorder");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("spi:adis16240");
Commit	Line	Data
2c834b4d BS	1	/*
	2	* ADIS16240 Programmable Impact Sensor and Recorder driver
	3	*
	4	* Copyright 2010 Analog Devices Inc.
	5	*
	6	* Licensed under the GPL-2 or later.
	7	*/
	8
	9	#include <linux/interrupt.h>
	10	#include <linux/irq.h>
	11	#include <linux/gpio.h>
	12	#include <linux/delay.h>
	13	#include <linux/mutex.h>
	14	#include <linux/device.h>
	15	#include <linux/kernel.h>
	16	#include <linux/spi/spi.h>
1cb6c1f5	17	#include <linux/slab.h>
2c834b4d BS	18	#include <linux/sysfs.h>
2c834b4d BS	19	#include <linux/list.h>
99c97852	20	#include <linux/module.h>
2c834b4d	21
06458e27 JC	22	#include <linux/iio/iio.h>
	23	#include <linux/iio/sysfs.h>
	24	#include <linux/iio/buffer.h>
ec04cb04	25	#include <linux/iio/imu/adis.h>
2c834b4d BS	26
2c834b4d BS	27	#include "adis16240.h"
2c834b4d BS	28
2c834b4d BS	29	static ssize_t adis16240_spi_read_signed(struct device *dev,
9963bce7 HM	30	struct device_attribute *attr,
	31	char *buf,
	32	unsigned bits)
2c834b4d	33	{
4b522ce7	34	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
5cb7cb11	35	struct adis *st = iio_priv(indio_dev);
2c834b4d BS	36	int ret;
	37	s16 val = 0;
	38	unsigned shift = 16 - bits;
	39	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
	40
5cb7cb11	41	ret = adis_read_reg_16(st,
9963bce7	42	this_attr->address, (u16 *)&val);
2c834b4d BS	43	if (ret)
	44	return ret;
	45
	46	if (val & ADIS16240_ERROR_ACTIVE)
5cb7cb11	47	adis_check_status(st);
2c834b4d	48
5db4851d	49	val = (s16)(val << shift) >> shift;
2c834b4d BS	50	return sprintf(buf, "%d\n", val);
	51	}
	52
2c834b4d	53	static ssize_t adis16240_read_12bit_signed(struct device *dev,
9963bce7 HM	54	struct device_attribute *attr,
9963bce7 HM	55	char *buf)
2c834b4d	56	{
2c834b4d	57	ssize_t ret;
4b522ce7	58	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
2c834b4d BS	59
	60	/* Take the iio_dev status lock */
	61	mutex_lock(&indio_dev->mlock);
	62	ret = adis16240_spi_read_signed(dev, attr, buf, 12);
	63	mutex_unlock(&indio_dev->mlock);
	64
	65	return ret;
	66	}
	67
322c9563	68	static IIO_DEVICE_ATTR(in_accel_xyz_squared_peak_raw, S_IRUGO,
2c834b4d BS	69	adis16240_read_12bit_signed, NULL,
2c834b4d BS	70	ADIS16240_XYZPEAK_OUT);
2c834b4d	71
51a0a5b0	72	static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("4096");
2c834b4d	73
5cb7cb11 LPC	74	static const u8 adis16240_addresses[][2] = {
	75	[ADIS16240_SCAN_ACC_X] = { ADIS16240_XACCL_OFF, ADIS16240_XPEAK_OUT },
	76	[ADIS16240_SCAN_ACC_Y] = { ADIS16240_YACCL_OFF, ADIS16240_YPEAK_OUT },
	77	[ADIS16240_SCAN_ACC_Z] = { ADIS16240_ZACCL_OFF, ADIS16240_ZPEAK_OUT },
cd69f57d JC	78	};
	79
	80	static int adis16240_read_raw(struct iio_dev *indio_dev,
	81	struct iio_chan_spec const *chan,
	82	int val, int val2,
	83	long mask)
	84	{
5cb7cb11	85	struct adis *st = iio_priv(indio_dev);
cd69f57d JC	86	int ret;
	87	int bits;
	88	u8 addr;
	89	s16 val16;
	90
	91	switch (mask) {
31313fc6	92	case IIO_CHAN_INFO_RAW:
5cb7cb11 LPC	93	return adis_single_conversion(indio_dev, chan,
5cb7cb11 LPC	94	ADIS16240_ERROR_ACTIVE, val);
c8a9f805	95	case IIO_CHAN_INFO_SCALE:
cd69f57d	96	switch (chan->type) {
6835cb6b	97	case IIO_VOLTAGE:
acba41f8 LPC	98	if (chan->channel == 0) {
	99	*val = 4;
	100	val2 = 880000; / 4.88 mV */
	101	return IIO_VAL_INT_PLUS_MICRO;
acba41f8	102	}
b5e736bd	103	return -EINVAL;
cd69f57d	104	case IIO_TEMP:
acba41f8 LPC	105	val = 244; / 0.244 C */
acba41f8 LPC	106	*val2 = 0;
cd69f57d JC	107	return IIO_VAL_INT_PLUS_MICRO;
	108	case IIO_ACCEL:
	109	*val = 0;
acba41f8	110	val2 = IIO_G_TO_M_S_2(51400); / 51.4 mg */
cd69f57d JC	111	return IIO_VAL_INT_PLUS_MICRO;
	112	default:
	113	return -EINVAL;
	114	}
	115	break;
c8a9f805	116	case IIO_CHAN_INFO_PEAK_SCALE:
acba41f8 LPC	117	*val = 0;
acba41f8 LPC	118	val2 = IIO_G_TO_M_S_2(51400); / 51.4 mg */
cd69f57d	119	return IIO_VAL_INT_PLUS_MICRO;
c8a9f805	120	case IIO_CHAN_INFO_OFFSET:
acba41f8	121	val = 25000 / 244 - 0x133; / 25 C = 0x133 */
cd69f57d	122	return IIO_VAL_INT;
c8a9f805	123	case IIO_CHAN_INFO_CALIBBIAS:
cd69f57d JC	124	bits = 10;
cd69f57d JC	125	mutex_lock(&indio_dev->mlock);
5cb7cb11 LPC	126	addr = adis16240_addresses[chan->scan_index][0];
5cb7cb11 LPC	127	ret = adis_read_reg_16(st, addr, &val16);
cd69f57d JC	128	if (ret) {
	129	mutex_unlock(&indio_dev->mlock);
	130	return ret;
	131	}
	132	val16 &= (1 << bits) - 1;
	133	val16 = (s16)(val16 << (16 - bits)) >> (16 - bits);
	134	*val = val16;
	135	mutex_unlock(&indio_dev->mlock);
	136	return IIO_VAL_INT;
c8a9f805	137	case IIO_CHAN_INFO_PEAK:
cd69f57d JC	138	bits = 10;
cd69f57d JC	139	mutex_lock(&indio_dev->mlock);
5cb7cb11 LPC	140	addr = adis16240_addresses[chan->scan_index][1];
5cb7cb11 LPC	141	ret = adis_read_reg_16(st, addr, &val16);
cd69f57d JC	142	if (ret) {
	143	mutex_unlock(&indio_dev->mlock);
	144	return ret;
	145	}
	146	val16 &= (1 << bits) - 1;
	147	val16 = (s16)(val16 << (16 - bits)) >> (16 - bits);
	148	*val = val16;
	149	mutex_unlock(&indio_dev->mlock);
	150	return IIO_VAL_INT;
	151	}
	152	return -EINVAL;
	153	}
	154
	155	static int adis16240_write_raw(struct iio_dev *indio_dev,
	156	struct iio_chan_spec const *chan,
	157	int val,
	158	int val2,
	159	long mask)
	160	{
5cb7cb11	161	struct adis *st = iio_priv(indio_dev);
cd69f57d JC	162	int bits = 10;
	163	s16 val16;
	164	u8 addr;
d7b79519	165
cd69f57d	166	switch (mask) {
c8a9f805	167	case IIO_CHAN_INFO_CALIBBIAS:
cd69f57d	168	val16 = val & ((1 << bits) - 1);
5cb7cb11 LPC	169	addr = adis16240_addresses[chan->scan_index][0];
5cb7cb11 LPC	170	return adis_write_reg_16(st, addr, val16);
cd69f57d JC	171	}
	172	return -EINVAL;
	173	}
	174
f4e4b955	175	static const struct iio_chan_spec adis16240_channels[] = {
82695ef5 JC	176	ADIS_SUPPLY_CHAN(ADIS16240_SUPPLY_OUT, ADIS16240_SCAN_SUPPLY, 0, 10),
82695ef5 JC	177	ADIS_AUX_ADC_CHAN(ADIS16240_AUX_ADC, ADIS16240_SCAN_AUX_ADC, 0, 10),
5cb7cb11	178	ADIS_ACCEL_CHAN(X, ADIS16240_XACCL_OUT, ADIS16240_SCAN_ACC_X,
9963bce7 HM	179	BIT(IIO_CHAN_INFO_CALIBBIAS) \| BIT(IIO_CHAN_INFO_PEAK),
9963bce7 HM	180	0, 10),
5cb7cb11	181	ADIS_ACCEL_CHAN(Y, ADIS16240_YACCL_OUT, ADIS16240_SCAN_ACC_Y,
9963bce7 HM	182	BIT(IIO_CHAN_INFO_CALIBBIAS) \| BIT(IIO_CHAN_INFO_PEAK),
9963bce7 HM	183	0, 10),
5cb7cb11	184	ADIS_ACCEL_CHAN(Z, ADIS16240_ZACCL_OUT, ADIS16240_SCAN_ACC_Z,
9963bce7 HM	185	BIT(IIO_CHAN_INFO_CALIBBIAS) \| BIT(IIO_CHAN_INFO_PEAK),
9963bce7 HM	186	0, 10),
82695ef5	187	ADIS_TEMP_CHAN(ADIS16240_TEMP_OUT, ADIS16240_SCAN_TEMP, 0, 10),
cd69f57d JC	188	IIO_CHAN_SOFT_TIMESTAMP(6)
	189	};
	190
2c834b4d	191	static struct attribute *adis16240_attributes[] = {
322c9563	192	&iio_dev_attr_in_accel_xyz_squared_peak_raw.dev_attr.attr,
51a0a5b0	193	&iio_const_attr_sampling_frequency_available.dev_attr.attr,
2c834b4d BS	194	NULL
	195	};
	196
	197	static const struct attribute_group adis16240_attribute_group = {
	198	.attrs = adis16240_attributes,
	199	};
	200
6fe8135f JC	201	static const struct iio_info adis16240_info = {
	202	.attrs = &adis16240_attribute_group,
	203	.read_raw = &adis16240_read_raw,
	204	.write_raw = &adis16240_write_raw,
aacff892	205	.update_scan_mode = adis_update_scan_mode,
6fe8135f JC	206	.driver_module = THIS_MODULE,
	207	};
	208
5cb7cb11 LPC	209	static const char * const adis16240_status_error_msgs[] = {
	210	[ADIS16240_DIAG_STAT_PWRON_FAIL_BIT] = "Power on, self-test failed",
	211	[ADIS16240_DIAG_STAT_SPI_FAIL_BIT] = "SPI failure",
	212	[ADIS16240_DIAG_STAT_FLASH_UPT_BIT] = "Flash update failed",
	213	[ADIS16240_DIAG_STAT_POWER_HIGH_BIT] = "Power supply above 3.625V",
	214	[ADIS16240_DIAG_STAT_POWER_LOW_BIT] = "Power supply below 2.225V",
	215	};
	216
	217	static const struct adis_data adis16240_data = {
	218	.write_delay = 35,
	219	.read_delay = 35,
	220	.msc_ctrl_reg = ADIS16240_MSC_CTRL,
	221	.glob_cmd_reg = ADIS16240_GLOB_CMD,
	222	.diag_stat_reg = ADIS16240_DIAG_STAT,
	223
	224	.self_test_mask = ADIS16240_MSC_CTRL_SELF_TEST_EN,
	225	.startup_delay = ADIS16240_STARTUP_DELAY,
	226
	227	.status_error_msgs = adis16240_status_error_msgs,
	228	.status_error_mask = BIT(ADIS16240_DIAG_STAT_PWRON_FAIL_BIT) \|
	229	BIT(ADIS16240_DIAG_STAT_SPI_FAIL_BIT) \|
	230	BIT(ADIS16240_DIAG_STAT_FLASH_UPT_BIT) \|
	231	BIT(ADIS16240_DIAG_STAT_POWER_HIGH_BIT) \|
	232	BIT(ADIS16240_DIAG_STAT_POWER_LOW_BIT),
	233	};
	234
4ae1c61f	235	static int adis16240_probe(struct spi_device *spi)
2c834b4d	236	{
26d25ae3	237	int ret;
5cb7cb11	238	struct adis *st;
a22ff706 JC	239	struct iio_dev *indio_dev;
	240
	241	/* setup the industrialio driver allocated elements */
e8cac7f6 SK	242	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
	243	if (!indio_dev)
	244	return -ENOMEM;
a22ff706	245	st = iio_priv(indio_dev);
2c834b4d	246	/* this is only used for removal purposes */
a22ff706	247	spi_set_drvdata(spi, indio_dev);
2c834b4d	248
a22ff706 JC	249	indio_dev->name = spi->dev.driver->name;
	250	indio_dev->dev.parent = &spi->dev;
	251	indio_dev->info = &adis16240_info;
	252	indio_dev->channels = adis16240_channels;
	253	indio_dev->num_channels = ARRAY_SIZE(adis16240_channels);
	254	indio_dev->modes = INDIO_DIRECT_MODE;
2c834b4d	255
5cb7cb11 LPC	256	ret = adis_init(st, indio_dev, spi, &adis16240_data);
5cb7cb11 LPC	257	if (ret)
e8cac7f6	258	return ret;
5cb7cb11	259	ret = adis_setup_buffer_and_trigger(st, indio_dev, NULL);
2c834b4d	260	if (ret)
e8cac7f6	261	return ret;
2c834b4d BS	262
2c834b4d BS	263	/* Get the device into a sane initial state */
5cb7cb11	264	ret = adis_initial_startup(st);
26d25ae3	265	if (ret)
5cb7cb11	266	goto error_cleanup_buffer_trigger;
26d25ae3	267	ret = iio_device_register(indio_dev);
2c834b4d	268	if (ret)
5cb7cb11	269	goto error_cleanup_buffer_trigger;
2c834b4d BS	270	return 0;
2c834b4d BS	271
5cb7cb11 LPC	272	error_cleanup_buffer_trigger:
5cb7cb11 LPC	273	adis_cleanup_buffer_and_trigger(st, indio_dev);
2c834b4d BS	274	return ret;
	275	}
	276
447d4f29	277	static int adis16240_remove(struct spi_device *spi)
2c834b4d	278	{
a22ff706	279	struct iio_dev *indio_dev = spi_get_drvdata(spi);
5cb7cb11	280	struct adis *st = iio_priv(indio_dev);
2c834b4d	281
d2fffd6c	282	iio_device_unregister(indio_dev);
5cb7cb11	283	adis_cleanup_buffer_and_trigger(st, indio_dev);
2c834b4d BS	284
	285	return 0;
	286	}
	287
	288	static struct spi_driver adis16240_driver = {
	289	.driver = {
	290	.name = "adis16240",
	291	.owner = THIS_MODULE,
	292	},
	293	.probe = adis16240_probe,
e543acf0	294	.remove = adis16240_remove,
2c834b4d	295	};
ae6ae6fe	296	module_spi_driver(adis16240_driver);
2c834b4d BS	297
	298	MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
	299	MODULE_DESCRIPTION("Analog Devices Programmable Impact Sensor and Recorder");
	300	MODULE_LICENSE("GPL v2");
55e4390c	301	MODULE_ALIAS("spi:adis16240");