1 files changed, 0 insertions, 777 deletions

diff --git a/drivers/staging/iio/gyro/adis16251_core.c b/drivers/staging/iio/gyro/adis16251_core.c
deleted file mode 100644
index a0d400f7ee62..000000000000
--- a/drivers/staging/iio/gyro/adis16251_core.c
+++ /dev/null
@@ -1,777 +0,0 @@
-/*
- * ADIS16251 Programmable Digital Gyroscope Sensor 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 "../iio.h"
-#include "../sysfs.h"
-#include "gyro.h"
-#include "../adc/adc.h"
-
-#include "adis16251.h"
-
-#define DRIVER_NAME		"adis16251"
-
-/* At the moment the spi framework doesn't allow global setting of cs_change.
- * It's in the likely to be added comment at the top of spi.h.
- * This means that use cannot be made of spi_write etc.
- */
-
-/**
- * adis16251_spi_write_reg_8() - write single byte to a register
- * @dev: device associated with child of actual device (iio_dev or iio_trig)
- * @reg_address: the address of the register to be written
- * @val: the value to write
- **/
-int adis16251_spi_write_reg_8(struct device *dev,
-		u8 reg_address,
-		u8 val)
-{
-	int ret;
-	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16251_state *st = iio_dev_get_devdata(indio_dev);
-
-	mutex_lock(&st->buf_lock);
-	st->tx[0] = ADIS16251_WRITE_REG(reg_address);
-	st->tx[1] = val;
-
-	ret = spi_write(st->us, st->tx, 2);
-	mutex_unlock(&st->buf_lock);
-
-	return ret;
-}
-
-/**
- * adis16251_spi_write_reg_16() - write 2 bytes to a pair of registers
- * @dev: device associated with child of actual device (iio_dev or iio_trig)
- * @reg_address: the address of the lower of the two registers. Second register
- *               is assumed to have address one greater.
- * @val: value to be written
- **/
-static int adis16251_spi_write_reg_16(struct device *dev,
-		u8 lower_reg_address,
-		u16 value)
-{
-	int ret;
-	struct spi_message msg;
-	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16251_state *st = iio_dev_get_devdata(indio_dev);
-	struct spi_transfer xfers[] = {
-		{
-			.tx_buf = st->tx,
-			.bits_per_word = 8,
-			.len = 2,
-			.cs_change = 1,
-		}, {
-			.tx_buf = st->tx + 2,
-			.bits_per_word = 8,
-			.len = 2,
-			.cs_change = 1,
-		},
-	};
-
-	mutex_lock(&st->buf_lock);
-	st->tx[0] = ADIS16251_WRITE_REG(lower_reg_address);
-	st->tx[1] = value & 0xFF;
-	st->tx[2] = ADIS16251_WRITE_REG(lower_reg_address + 1);
-	st->tx[3] = (value >> 8) & 0xFF;
-
-	spi_message_init(&msg);
-	spi_message_add_tail(&xfers[0], &msg);
-	spi_message_add_tail(&xfers[1], &msg);
-	ret = spi_sync(st->us, &msg);
-	mutex_unlock(&st->buf_lock);
-
-	return ret;
-}
-
-/**
- * adis16251_spi_read_reg_16() - read 2 bytes from a 16-bit register
- * @dev: device associated with child of actual device (iio_dev or iio_trig)
- * @reg_address: the address of the lower of the two registers. Second register
- *               is assumed to have address one greater.
- * @val: somewhere to pass back the value read
- **/
-static int adis16251_spi_read_reg_16(struct device *dev,
-		u8 lower_reg_address,
-		u16 *val)
-{
-	struct spi_message msg;
-	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16251_state *st = iio_dev_get_devdata(indio_dev);
-	int ret;
-	struct spi_transfer xfers[] = {
-		{
-			.tx_buf = st->tx,
-			.bits_per_word = 8,
-			.len = 2,
-			.cs_change = 1,
-		}, {
-			.rx_buf = st->rx,
-			.bits_per_word = 8,
-			.len = 2,
-			.cs_change = 1,
-		},
-	};
-
-	mutex_lock(&st->buf_lock);
-	st->tx[0] = ADIS16251_READ_REG(lower_reg_address);
-	st->tx[1] = 0;
-	st->tx[2] = 0;
-	st->tx[3] = 0;
-
-	spi_message_init(&msg);
-	spi_message_add_tail(&xfers[0], &msg);
-	spi_message_add_tail(&xfers[1], &msg);
-	ret = spi_sync(st->us, &msg);
-	if (ret) {
-		dev_err(&st->us->dev, "problem when reading 16 bit register 0x%02X",
-				lower_reg_address);
-		goto error_ret;
-	}
-	*val = (st->rx[0] << 8) | st->rx[1];
-
-error_ret:
-	mutex_unlock(&st->buf_lock);
-	return ret;
-}
-
-/**
- * adis16251_spi_read_burst() - read all data registers
- * @dev: device associated with child of actual device (iio_dev or iio_trig)
- * @rx: somewhere to pass back the value read (min size is 24 bytes)
- **/
-int adis16251_spi_read_burst(struct device *dev, u8 *rx)
-{
-	struct spi_message msg;
-	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16251_state *st = iio_dev_get_devdata(indio_dev);
-	u32 old_speed_hz = st->us->max_speed_hz;
-	int ret;
-
-	struct spi_transfer xfers[] = {
-		{
-			.tx_buf = st->tx,
-			.bits_per_word = 8,
-			.len = 2,
-			.cs_change = 0,
-		}, {
-			.rx_buf = rx,
-			.bits_per_word = 8,
-			.len = 24,
-			.cs_change = 1,
-		},
-	};
-
-	mutex_lock(&st->buf_lock);
-	st->tx[0] = ADIS16251_READ_REG(ADIS16251_GLOB_CMD);
-	st->tx[1] = 0;
-
-	spi_message_init(&msg);
-	spi_message_add_tail(&xfers[0], &msg);
-	spi_message_add_tail(&xfers[1], &msg);
-
-	st->us->max_speed_hz = min(ADIS16251_SPI_BURST, old_speed_hz);
-	spi_setup(st->us);
-
-	ret = spi_sync(st->us, &msg);
-	if (ret)
-		dev_err(&st->us->dev, "problem when burst reading");
-
-	st->us->max_speed_hz = old_speed_hz;
-	spi_setup(st->us);
-	mutex_unlock(&st->buf_lock);
-	return ret;
-}
-
-/**
- * adis16251_spi_read_sequence() - read a sequence of 16-bit registers
- * @dev: device associated with child of actual device (iio_dev or iio_trig)
- * @tx: register addresses in bytes 0,2,4,6... (min size is 2*num bytes)
- * @rx: somewhere to pass back the value read (min size is 2*num bytes)
- **/
-int adis16251_spi_read_sequence(struct device *dev,
-		u8 *tx, u8 *rx, int num)
-{
-	struct spi_message msg;
-	struct spi_transfer *xfers;
-	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16251_state *st = iio_dev_get_devdata(indio_dev);
-	int ret, i;
-
-	xfers = kzalloc(num + 1, GFP_KERNEL);
-	if (xfers == NULL) {
-		dev_err(&st->us->dev, "memory alloc failed");
-		ret = -ENOMEM;
-		goto error_ret;
-	}
-
-	/* tx: |add1|addr2|addr3|...|addrN |zero|
-	 * rx: |zero|res1 |res2 |...|resN-1|resN| */
-	spi_message_init(&msg);
-	for (i = 0; i < num + 1; i++) {
-		if (i > 0)
-			xfers[i].rx_buf = st->rx + 2*(i - 1);
-		if (i < num)
-			xfers[i].tx_buf = st->tx + 2*i;
-		xfers[i].bits_per_word = 8;
-		xfers[i].len = 2;
-		xfers[i].cs_change = 1;
-		spi_message_add_tail(&xfers[i], &msg);
-	}
-
-	mutex_lock(&st->buf_lock);
-
-	ret = spi_sync(st->us, &msg);
-	if (ret)
-		dev_err(&st->us->dev, "problem when reading sequence");
-
-	mutex_unlock(&st->buf_lock);
-	kfree(xfers);
-
-error_ret:
-	return ret;
-}
-
-static ssize_t adis16251_spi_read_signed(struct device *dev,
-		struct device_attribute *attr,
-		char *buf,
-		unsigned bits)
-{
-	int ret;
-	s16 val = 0;
-	unsigned shift = 16 - bits;
-	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
-
-	ret = adis16251_spi_read_reg_16(dev, this_attr->address, (u16 *)&val);
-	if (ret)
-		return ret;
-
-	if (val & ADIS16251_ERROR_ACTIVE)
-		adis16251_check_status(dev);
-	val = ((s16)(val << shift) >> shift);
-	return sprintf(buf, "%d\n", val);
-}
-
-static ssize_t adis16251_read_12bit_unsigned(struct device *dev,
-		struct device_attribute *attr,
-		char *buf)
-{
-	int ret;
-	u16 val = 0;
-	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
-
-	ret = adis16251_spi_read_reg_16(dev, this_attr->address, &val);
-	if (ret)
-		return ret;
-
-	if (val & ADIS16251_ERROR_ACTIVE)
-		adis16251_check_status(dev);
-
-	return sprintf(buf, "%u\n", val & 0x0FFF);
-}
-
-static ssize_t adis16251_read_14bit_signed(struct device *dev,
-		struct device_attribute *attr,
-		char *buf)
-{
-	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	ssize_t ret;
-
-	/* Take the iio_dev status lock */
-	mutex_lock(&indio_dev->mlock);
-	ret =  adis16251_spi_read_signed(dev, attr, buf, 14);
-	mutex_unlock(&indio_dev->mlock);
-
-	return ret;
-}
-
-static ssize_t adis16251_read_12bit_signed(struct device *dev,
-		struct device_attribute *attr,
-		char *buf)
-{
-	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	ssize_t ret;
-
-	/* Take the iio_dev status lock */
-	mutex_lock(&indio_dev->mlock);
-	ret =  adis16251_spi_read_signed(dev, attr, buf, 12);
-	mutex_unlock(&indio_dev->mlock);
-
-	return ret;
-}
-
-static ssize_t adis16251_write_16bit(struct device *dev,
-		struct device_attribute *attr,
-		const char *buf,
-		size_t len)
-{
-	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
-	int ret;
-	long val;
-
-	ret = strict_strtol(buf, 10, &val);
-	if (ret)
-		goto error_ret;
-	ret = adis16251_spi_write_reg_16(dev, this_attr->address, val);
-
-error_ret:
-	return ret ? ret : len;
-}
-
-static ssize_t adis16251_read_frequency(struct device *dev,
-		struct device_attribute *attr,
-		char *buf)
-{
-	int ret, len = 0;
-	u16 t;
-	int sps;
-	ret = adis16251_spi_read_reg_16(dev,
-			ADIS16251_SMPL_PRD,
-			&t);
-	if (ret)
-		return ret;
-	sps =  (t & ADIS16251_SMPL_PRD_TIME_BASE) ? 8 : 256;
-	sps /= (t & ADIS16251_SMPL_PRD_DIV_MASK) + 1;
-	len = sprintf(buf, "%d SPS\n", sps);
-	return len;
-}
-
-static ssize_t adis16251_write_frequency(struct device *dev,
-		struct device_attribute *attr,
-		const char *buf,
-		size_t len)
-{
-	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct adis16251_state *st = iio_dev_get_devdata(indio_dev);
-	long val;
-	int ret;
-	u8 t;
-
-	ret = strict_strtol(buf, 10, &val);
-	if (ret)
-		return ret;
-
-	mutex_lock(&indio_dev->mlock);
-
-	t = (256 / val);
-	if (t > 0)
-		t--;
-	t &= ADIS16251_SMPL_PRD_DIV_MASK;
-	if ((t & ADIS16251_SMPL_PRD_DIV_MASK) >= 0x0A)
-		st->us->max_speed_hz = ADIS16251_SPI_SLOW;
-	else
-		st->us->max_speed_hz = ADIS16251_SPI_FAST;
-
-	ret = adis16251_spi_write_reg_8(dev,
-			ADIS16251_SMPL_PRD,
-			t);
-
-	mutex_unlock(&indio_dev->mlock);
-
-	return ret ? ret : len;
-}
-
-static ssize_t adis16251_write_reset(struct device *dev,
-		struct device_attribute *attr,
-		const char *buf, size_t len)
-{
-	if (len < 1)
-		return -1;
-	switch (buf[0]) {
-	case '1':
-	case 'y':
-	case 'Y':
-		return adis16251_reset(dev);
-	}
-	return -1;
-}
-
-
-
-int adis16251_set_irq(struct device *dev, bool enable)
-{
-	int ret;
-	u16 msc;
-	ret = adis16251_spi_read_reg_16(dev, ADIS16251_MSC_CTRL, &msc);
-	if (ret)
-		goto error_ret;
-
-	msc |= ADIS16251_MSC_CTRL_DATA_RDY_POL_HIGH;
-	if (enable)
-		msc |= ADIS16251_MSC_CTRL_DATA_RDY_EN;
-	else
-		msc &= ~ADIS16251_MSC_CTRL_DATA_RDY_EN;
-
-	ret = adis16251_spi_write_reg_16(dev, ADIS16251_MSC_CTRL, msc);
-	if (ret)
-		goto error_ret;
-
-error_ret:
-	return ret;
-}
-
-int adis16251_reset(struct device *dev)
-{
-	int ret;
-	ret = adis16251_spi_write_reg_8(dev,
-			ADIS16251_GLOB_CMD,
-			ADIS16251_GLOB_CMD_SW_RESET);
-	if (ret)
-		dev_err(dev, "problem resetting device");
-
-	return ret;
-}
-
-/* Power down the device */
-int adis16251_stop_device(struct device *dev)
-{
-	int ret;
-	u16 val = ADIS16251_SLP_CNT_POWER_OFF;
-
-	ret = adis16251_spi_write_reg_16(dev, ADIS16251_SLP_CNT, val);
-	if (ret)
-		dev_err(dev, "problem with turning device off: SLP_CNT");
-
-	return ret;
-}
-
-static int adis16251_self_test(struct device *dev)
-{
-	int ret;
-
-	ret = adis16251_spi_write_reg_16(dev,
-			ADIS16251_MSC_CTRL,
-			ADIS16251_MSC_CTRL_INT_SELF_TEST);
-	if (ret) {
-		dev_err(dev, "problem starting self test");
-		goto err_ret;
-	}
-
-	adis16251_check_status(dev);
-
-err_ret:
-	return ret;
-}
-
-int adis16251_check_status(struct device *dev)
-{
-	u16 status;
-	int ret;
-
-	ret = adis16251_spi_read_reg_16(dev, ADIS16251_DIAG_STAT, &status);
-
-	if (ret < 0) {
-		dev_err(dev, "Reading status failed\n");
-		goto error_ret;
-	}
-
-	if (!(status & ADIS16251_DIAG_STAT_ERR_MASK)) {
-		ret = 0;
-		goto error_ret;
-	}
-
-	ret = -EFAULT;
-
-	if (status & ADIS16251_DIAG_STAT_ALARM2)
-		dev_err(dev, "Alarm 2 active\n");
-	if (status & ADIS16251_DIAG_STAT_ALARM1)
-		dev_err(dev, "Alarm 1 active\n");
-	if (status & ADIS16251_DIAG_STAT_SELF_TEST)
-		dev_err(dev, "Self test error\n");
-	if (status & ADIS16251_DIAG_STAT_OVERFLOW)
-		dev_err(dev, "Sensor overrange\n");
-	if (status & ADIS16251_DIAG_STAT_SPI_FAIL)
-		dev_err(dev, "SPI failure\n");
-	if (status & ADIS16251_DIAG_STAT_FLASH_UPT)
-		dev_err(dev, "Flash update failed\n");
-	if (status & ADIS16251_DIAG_STAT_POWER_HIGH)
-		dev_err(dev, "Power supply above 5.25V\n");
-	if (status & ADIS16251_DIAG_STAT_POWER_LOW)
-		dev_err(dev, "Power supply below 4.75V\n");
-
-error_ret:
-	return ret;
-}
-
-static int adis16251_initial_setup(struct adis16251_state *st)
-{
-	int ret;
-	u16 smp_prd;
-	struct device *dev = &st->indio_dev->dev;
-
-	/* use low spi speed for init */
-	st->us->max_speed_hz = ADIS16251_SPI_SLOW;
-	st->us->mode = SPI_MODE_3;
-	spi_setup(st->us);
-
-	/* Disable IRQ */
-	ret = adis16251_set_irq(dev, false);
-	if (ret) {
-		dev_err(dev, "disable irq failed");
-		goto err_ret;
-	}
-
-	/* Do self test */
-
-	/* Read status register to check the result */
-	ret = adis16251_check_status(dev);
-	if (ret) {
-		adis16251_reset(dev);
-		dev_err(dev, "device not playing ball -> reset");
-		msleep(ADIS16251_STARTUP_DELAY);
-		ret = adis16251_check_status(dev);
-		if (ret) {
-			dev_err(dev, "giving up");
-			goto err_ret;
-		}
-	}
-
-	printk(KERN_INFO DRIVER_NAME ": at CS%d (irq %d)\n",
-			st->us->chip_select, st->us->irq);
-
-	/* use high spi speed if possible */
-	ret = adis16251_spi_read_reg_16(dev, ADIS16251_SMPL_PRD, &smp_prd);
-	if (!ret && (smp_prd & ADIS16251_SMPL_PRD_DIV_MASK) < 0x0A) {
-		st->us->max_speed_hz = ADIS16251_SPI_SLOW;
-		spi_setup(st->us);
-	}
-
-err_ret:
-	return ret;
-}
-
-static IIO_DEV_ATTR_IN_NAMED_RAW(0, supply, adis16251_read_12bit_signed,
-		ADIS16251_SUPPLY_OUT);
-static IIO_CONST_ATTR(in0_supply_scale, "0.0018315");
-
-static IIO_DEV_ATTR_GYRO(adis16251_read_14bit_signed,
-		ADIS16251_GYRO_OUT);
-static IIO_DEV_ATTR_GYRO_SCALE(S_IWUSR | S_IRUGO,
-		adis16251_read_12bit_signed,
-		adis16251_write_16bit,
-		ADIS16251_GYRO_SCALE);
-static IIO_DEV_ATTR_GYRO_OFFSET(S_IWUSR | S_IRUGO,
-		adis16251_read_12bit_signed,
-		adis16251_write_16bit,
-		ADIS16251_GYRO_OFF);
-
-static IIO_DEV_ATTR_TEMP_RAW(adis16251_read_12bit_signed);
-static IIO_CONST_ATTR(temp_offset, "25 K");
-static IIO_CONST_ATTR(temp_scale, "0.1453 K");
-
-static IIO_DEV_ATTR_IN_NAMED_RAW(1, aux, adis16251_read_12bit_unsigned,
-		ADIS16251_AUX_ADC);
-static IIO_CONST_ATTR(in1_aux_scale, "0.0006105");
-
-static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO,
-		adis16251_read_frequency,
-		adis16251_write_frequency);
-static IIO_DEV_ATTR_ANGL(adis16251_read_14bit_signed,
-		ADIS16251_ANGL_OUT);
-
-static IIO_DEV_ATTR_RESET(adis16251_write_reset);
-
-static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("0.129 ~ 256");
-
-static IIO_CONST_ATTR(name, "adis16251");
-
-static struct attribute *adis16251_event_attributes[] = {
-	NULL
-};
-
-static struct attribute_group adis16251_event_attribute_group = {
-	.attrs = adis16251_event_attributes,
-};
-
-static struct attribute *adis16251_attributes[] = {
-	&iio_dev_attr_in0_supply_raw.dev_attr.attr,
-	&iio_const_attr_in0_supply_scale.dev_attr.attr,
-	&iio_dev_attr_gyro_raw.dev_attr.attr,
-	&iio_dev_attr_gyro_scale.dev_attr.attr,
-	&iio_dev_attr_gyro_offset.dev_attr.attr,
-	&iio_dev_attr_angl_raw.dev_attr.attr,
-	&iio_dev_attr_temp_raw.dev_attr.attr,
-	&iio_const_attr_temp_offset.dev_attr.attr,
-	&iio_const_attr_temp_scale.dev_attr.attr,
-	&iio_dev_attr_in1_aux_raw.dev_attr.attr,
-	&iio_const_attr_in1_aux_scale.dev_attr.attr,
-	&iio_dev_attr_sampling_frequency.dev_attr.attr,
-	&iio_const_attr_sampling_frequency_available.dev_attr.attr,
-	&iio_dev_attr_reset.dev_attr.attr,
-	&iio_const_attr_name.dev_attr.attr,
-	NULL
-};
-
-static const struct attribute_group adis16251_attribute_group = {
-	.attrs = adis16251_attributes,
-};
-
-static int __devinit adis16251_probe(struct spi_device *spi)
-{
-	int ret, regdone = 0;
-	struct adis16251_state *st = kzalloc(sizeof *st, GFP_KERNEL);
-	if (!st) {
-		ret =  -ENOMEM;
-		goto error_ret;
-	}
-	/* this is only used for removal purposes */
-	spi_set_drvdata(spi, st);
-
-	/* Allocate the comms buffers */
-	st->rx = kzalloc(sizeof(*st->rx)*ADIS16251_MAX_RX, GFP_KERNEL);
-	if (st->rx == NULL) {
-		ret = -ENOMEM;
-		goto error_free_st;
-	}
-	st->tx = kzalloc(sizeof(*st->tx)*ADIS16251_MAX_TX, GFP_KERNEL);
-	if (st->tx == NULL) {
-		ret = -ENOMEM;
-		goto error_free_rx;
-	}
-	st->us = spi;
-	mutex_init(&st->buf_lock);
-	/* setup the industrialio driver allocated elements */
-	st->indio_dev = iio_allocate_device();
-	if (st->indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_free_tx;
-	}
-
-	st->indio_dev->dev.parent = &spi->dev;
-	st->indio_dev->num_interrupt_lines = 1;
-	st->indio_dev->event_attrs = &adis16251_event_attribute_group;
-	st->indio_dev->attrs = &adis16251_attribute_group;
-	st->indio_dev->dev_data = (void *)(st);
-	st->indio_dev->driver_module = THIS_MODULE;
-	st->indio_dev->modes = INDIO_DIRECT_MODE;
-
-	ret = adis16251_configure_ring(st->indio_dev);
-	if (ret)
-		goto error_free_dev;
-
-	ret = iio_device_register(st->indio_dev);
-	if (ret)
-		goto error_unreg_ring_funcs;
-	regdone = 1;
-
-	ret = adis16251_initialize_ring(st->indio_dev->ring);
-	if (ret) {
-		printk(KERN_ERR "failed to initialize the ring\n");
-		goto error_unreg_ring_funcs;
-	}
-
-	if (spi->irq && gpio_is_valid(irq_to_gpio(spi->irq)) > 0) {
-		ret = iio_register_interrupt_line(spi->irq,
-				st->indio_dev,
-				0,
-				IRQF_TRIGGER_RISING,
-				"adis16251");
-		if (ret)
-			goto error_uninitialize_ring;
-
-		ret = adis16251_probe_trigger(st->indio_dev);
-		if (ret)
-			goto error_unregister_line;
-	}
-
-	/* Get the device into a sane initial state */
-	ret = adis16251_initial_setup(st);
-	if (ret)
-		goto error_remove_trigger;
-	return 0;
-
-error_remove_trigger:
-	if (st->indio_dev->modes & INDIO_RING_TRIGGERED)
-		adis16251_remove_trigger(st->indio_dev);
-error_unregister_line:
-	if (st->indio_dev->modes & INDIO_RING_TRIGGERED)
-		iio_unregister_interrupt_line(st->indio_dev, 0);
-error_uninitialize_ring:
-	adis16251_uninitialize_ring(st->indio_dev->ring);
-error_unreg_ring_funcs:
-	adis16251_unconfigure_ring(st->indio_dev);
-error_free_dev:
-	if (regdone)
-		iio_device_unregister(st->indio_dev);
-	else
-		iio_free_device(st->indio_dev);
-error_free_tx:
-	kfree(st->tx);
-error_free_rx:
-	kfree(st->rx);
-error_free_st:
-	kfree(st);
-error_ret:
-	return ret;
-}
-
-/* fixme, confirm ordering in this function */
-static int adis16251_remove(struct spi_device *spi)
-{
-	int ret;
-	struct adis16251_state *st = spi_get_drvdata(spi);
-	struct iio_dev *indio_dev = st->indio_dev;
-
-	ret = adis16251_stop_device(&(indio_dev->dev));
-	if (ret)
-		goto err_ret;
-
-	flush_scheduled_work();
-
-	adis16251_remove_trigger(indio_dev);
-	if (spi->irq && gpio_is_valid(irq_to_gpio(spi->irq)) > 0)
-		iio_unregister_interrupt_line(indio_dev, 0);
-
-	adis16251_uninitialize_ring(indio_dev->ring);
-	adis16251_unconfigure_ring(indio_dev);
-	iio_device_unregister(indio_dev);
-	kfree(st->tx);
-	kfree(st->rx);
-	kfree(st);
-
-	return 0;
-
-err_ret:
-	return ret;
-}
-
-static struct spi_driver adis16251_driver = {
-	.driver = {
-		.name = "adis16251",
-		.owner = THIS_MODULE,
-	},
-	.probe = adis16251_probe,
-	.remove = __devexit_p(adis16251_remove),
-};
-
-static __init int adis16251_init(void)
-{
-	return spi_register_driver(&adis16251_driver);
-}
-module_init(adis16251_init);
-
-static __exit void adis16251_exit(void)
-{
-	spi_unregister_driver(&adis16251_driver);
-}
-module_exit(adis16251_exit);
-
-MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
-MODULE_DESCRIPTION("Analog Devices ADIS16251 Digital Gyroscope Sensor SPI driver");
-MODULE_LICENSE("GPL v2");