1 files changed, 0 insertions, 383 deletions
diff --git a/drivers/staging/iio/dac/ad5764.c b/drivers/staging/iio/dac/ad5764.c
deleted file mode 100644
index 03dbd937b081..000000000000
--- a/drivers/staging/iio/dac/ad5764.c
+++ /dev/null
@@ -1,383 +0,0 @@
-/*
- * Analog devices AD5764, AD5764R, AD5744, AD5744R quad-channel
- * Digital to Analog Converters driver
- *
- * Copyright 2011 Analog Devices Inc.
- *
- * Licensed under the GPL-2.
- */
-
-#include <linux/device.h>
-#include <linux/err.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/spi/spi.h>
-#include <linux/slab.h>
-#include <linux/sysfs.h>
-#include <linux/regulator/consumer.h>
-
-#include <linux/iio/iio.h>
-#include <linux/iio/sysfs.h>
-#include "dac.h"
-
-#define AD5764_REG_SF_NOP			0x0
-#define AD5764_REG_SF_CONFIG			0x1
-#define AD5764_REG_SF_CLEAR			0x4
-#define AD5764_REG_SF_LOAD			0x5
-#define AD5764_REG_DATA(x)			((2 << 3) | (x))
-#define AD5764_REG_COARSE_GAIN(x)		((3 << 3) | (x))
-#define AD5764_REG_FINE_GAIN(x)			((4 << 3) | (x))
-#define AD5764_REG_OFFSET(x)			((5 << 3) | (x))
-
-#define AD5764_NUM_CHANNELS 4
-
-/**
- * struct ad5764_chip_info - chip specific information
- * @int_vref:	Value of the internal reference voltage in uV - 0 if external
- *		reference voltage is used
- * @channel	channel specification
-*/
-
-struct ad5764_chip_info {
-	unsigned long int_vref;
-	const struct iio_chan_spec *channels;
-};
-
-/**
- * struct ad5764_state - driver instance specific data
- * @spi:		spi_device
- * @chip_info:		chip info
- * @vref_reg:		vref supply regulators
- * @data:		spi transfer buffers
- */
-
-struct ad5764_state {
-	struct spi_device		*spi;
-	const struct ad5764_chip_info	*chip_info;
-	struct regulator_bulk_data	vref_reg[2];
-
-	/*
-	 * DMA (thus cache coherency maintenance) requires the
-	 * transfer buffers to live in their own cache lines.
-	 */
-	union {
-		__be32 d32;
-		u8 d8[4];
-	} data[2] ____cacheline_aligned;
-};
-
-enum ad5764_type {
-	ID_AD5744,
-	ID_AD5744R,
-	ID_AD5764,
-	ID_AD5764R,
-};
-
-#define AD5764_CHANNEL(_chan, _bits) {				\
-	.type = IIO_VOLTAGE,					\
-	.indexed = 1,						\
-	.output = 1,						\
-	.channel = (_chan),					\
-	.address = (_chan),					\
-	.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |		\
-		IIO_CHAN_INFO_OFFSET_SHARED_BIT |		\
-		IIO_CHAN_INFO_SCALE_SEPARATE_BIT |		\
-		IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |		\
-		IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,		\
-	.scan_type = IIO_ST('u', (_bits), 16, 16 - (_bits))	\
-}
-
-#define DECLARE_AD5764_CHANNELS(_name, _bits) \
-const struct iio_chan_spec _name##_channels[] = { \
-	AD5764_CHANNEL(0, (_bits)), \
-	AD5764_CHANNEL(1, (_bits)), \
-	AD5764_CHANNEL(2, (_bits)), \
-	AD5764_CHANNEL(3, (_bits)), \
-};
-
-static DECLARE_AD5764_CHANNELS(ad5764, 16);
-static DECLARE_AD5764_CHANNELS(ad5744, 14);
-
-static const struct ad5764_chip_info ad5764_chip_infos[] = {
-	[ID_AD5744] = {
-		.int_vref = 0,
-		.channels = ad5744_channels,
-	},
-	[ID_AD5744R] = {
-		.int_vref = 5000000,
-		.channels = ad5744_channels,
-	},
-	[ID_AD5764] = {
-		.int_vref = 0,
-		.channels = ad5764_channels,
-	},
-	[ID_AD5764R] = {
-		.int_vref = 5000000,
-		.channels = ad5764_channels,
-	},
-};
-
-static int ad5764_write(struct iio_dev *indio_dev, unsigned int reg,
-	unsigned int val)
-{
-	struct ad5764_state *st = iio_priv(indio_dev);
-	int ret;
-
-	mutex_lock(&indio_dev->mlock);
-	st->data[0].d32 = cpu_to_be32((reg << 16) | val);
-
-	ret = spi_write(st->spi, &st->data[0].d8[1], 3);
-	mutex_unlock(&indio_dev->mlock);
-
-	return ret;
-}
-
-static int ad5764_read(struct iio_dev *indio_dev, unsigned int reg,
-	unsigned int *val)
-{
-	struct ad5764_state *st = iio_priv(indio_dev);
-	struct spi_message m;
-	int ret;
-	struct spi_transfer t[] = {
-		{
-			.tx_buf = &st->data[0].d8[1],
-			.len = 3,
-			.cs_change = 1,
-		}, {
-			.rx_buf = &st->data[1].d8[1],
-			.len = 3,
-		},
-	};
-
-	spi_message_init(&m);
-	spi_message_add_tail(&t[0], &m);
-	spi_message_add_tail(&t[1], &m);
-
-	mutex_lock(&indio_dev->mlock);
-
-	st->data[0].d32 = cpu_to_be32((1 << 23) | (reg << 16));
-
-	ret = spi_sync(st->spi, &m);
-	if (ret >= 0)
-		*val = be32_to_cpu(st->data[1].d32) & 0xffff;
-
-	mutex_unlock(&indio_dev->mlock);
-
-	return ret;
-}
-
-static int ad5764_chan_info_to_reg(struct iio_chan_spec const *chan, long info)
-{
-	switch (info) {
-	case 0:
-		return AD5764_REG_DATA(chan->address);
-	case IIO_CHAN_INFO_CALIBBIAS:
-		return AD5764_REG_OFFSET(chan->address);
-	case IIO_CHAN_INFO_CALIBSCALE:
-		return AD5764_REG_FINE_GAIN(chan->address);
-	default:
-		break;
-	}
-
-	return 0;
-}
-
-static int ad5764_write_raw(struct iio_dev *indio_dev,
-	struct iio_chan_spec const *chan, int val, int val2, long info)
-{
-	const int max_val = (1 << chan->scan_type.realbits);
-	unsigned int reg;
-
-	switch (info) {
-	case IIO_CHAN_INFO_RAW:
-		if (val >= max_val || val < 0)
-			return -EINVAL;
-		val <<= chan->scan_type.shift;
-		break;
-	case IIO_CHAN_INFO_CALIBBIAS:
-		if (val >= 128 || val < -128)
-			return -EINVAL;
-		break;
-	case IIO_CHAN_INFO_CALIBSCALE:
-		if (val >= 32 || val < -32)
-			return -EINVAL;
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	reg = ad5764_chan_info_to_reg(chan, info);
-	return ad5764_write(indio_dev, reg, (u16)val);
-}
-
-static int ad5764_get_channel_vref(struct ad5764_state *st,
-	unsigned int channel)
-{
-	if (st->chip_info->int_vref)
-		return st->chip_info->int_vref;
-	else
-		return regulator_get_voltage(st->vref_reg[channel / 2].consumer);
-}
-
-static int ad5764_read_raw(struct iio_dev *indio_dev,
-	struct iio_chan_spec const *chan, int *val, int *val2, long info)
-{
-	struct ad5764_state *st = iio_priv(indio_dev);
-	unsigned long scale_uv;
-	unsigned int reg;
-	int vref;
-	int ret;
-
-	switch (info) {
-	case IIO_CHAN_INFO_RAW:
-		reg = AD5764_REG_DATA(chan->address);
-		ret = ad5764_read(indio_dev, reg, val);
-		if (ret < 0)
-			return ret;
-		*val >>= chan->scan_type.shift;
-		return IIO_VAL_INT;
-	case IIO_CHAN_INFO_CALIBBIAS:
-		reg = AD5764_REG_OFFSET(chan->address);
-		ret = ad5764_read(indio_dev, reg, val);
-		if (ret < 0)
-			return ret;
-		*val = sign_extend32(*val, 7);
-		return IIO_VAL_INT;
-	case IIO_CHAN_INFO_CALIBSCALE:
-		reg = AD5764_REG_FINE_GAIN(chan->address);
-		ret = ad5764_read(indio_dev, reg, val);
-		if (ret < 0)
-			return ret;
-		*val = sign_extend32(*val, 5);
-		return IIO_VAL_INT;
-	case IIO_CHAN_INFO_SCALE:
-		/* vout = 4 * vref + ((dac_code / 65535) - 0.5) */
-		vref = ad5764_get_channel_vref(st, chan->channel);
-		if (vref < 0)
-			return vref;
-
-		scale_uv = (vref * 4 * 100) >> chan->scan_type.realbits;
-		*val = scale_uv / 100000;
-		*val2 = (scale_uv % 100000) * 10;
-		return IIO_VAL_INT_PLUS_MICRO;
-	case IIO_CHAN_INFO_OFFSET:
-		*val = -(1 << chan->scan_type.realbits) / 2;
-		return IIO_VAL_INT;
-	}
-
-	return -EINVAL;
-}
-
-static const struct iio_info ad5764_info = {
-	.read_raw = ad5764_read_raw,
-	.write_raw = ad5764_write_raw,
-	.driver_module = THIS_MODULE,
-};
-
-static int __devinit ad5764_probe(struct spi_device *spi)
-{
-	enum ad5764_type type = spi_get_device_id(spi)->driver_data;
-	struct iio_dev *indio_dev;
-	struct ad5764_state *st;
-	int ret;
-
-	indio_dev = iio_device_alloc(sizeof(*st));
-	if (indio_dev == NULL) {
-		dev_err(&spi->dev, "Failed to allocate iio device\n");
-		return -ENOMEM;
-	}
-
-	st = iio_priv(indio_dev);
-	spi_set_drvdata(spi, indio_dev);
-
-	st->spi = spi;
-	st->chip_info = &ad5764_chip_infos[type];
-
-	indio_dev->dev.parent = &spi->dev;
-	indio_dev->name = spi_get_device_id(spi)->name;
-	indio_dev->info = &ad5764_info;
-	indio_dev->modes = INDIO_DIRECT_MODE;
-	indio_dev->num_channels = AD5764_NUM_CHANNELS;
-	indio_dev->channels = st->chip_info->channels;
-
-	if (st->chip_info->int_vref == 0) {
-		st->vref_reg[0].supply = "vrefAB";
-		st->vref_reg[1].supply = "vrefCD";
-
-		ret = regulator_bulk_get(&st->spi->dev,
-			ARRAY_SIZE(st->vref_reg), st->vref_reg);
-		if (ret) {
-			dev_err(&spi->dev, "Failed to request vref regulators: %d\n",
-				ret);
-			goto error_free;
-		}
-
-		ret = regulator_bulk_enable(ARRAY_SIZE(st->vref_reg),
-			st->vref_reg);
-		if (ret) {
-			dev_err(&spi->dev, "Failed to enable vref regulators: %d\n",
-				ret);
-			goto error_free_reg;
-		}
-	}
-
-	ret = iio_device_register(indio_dev);
-	if (ret) {
-		dev_err(&spi->dev, "Failed to register iio device: %d\n", ret);
-		goto error_disable_reg;
-	}
-
-	return 0;
-
-error_disable_reg:
-	if (st->chip_info->int_vref == 0)
-		regulator_bulk_disable(ARRAY_SIZE(st->vref_reg), st->vref_reg);
-error_free_reg:
-	if (st->chip_info->int_vref == 0)
-		regulator_bulk_free(ARRAY_SIZE(st->vref_reg), st->vref_reg);
-error_free:
-	iio_device_free(indio_dev);
-
-	return ret;
-}
-
-static int __devexit ad5764_remove(struct spi_device *spi)
-{
-	struct iio_dev *indio_dev = spi_get_drvdata(spi);
-	struct ad5764_state *st = iio_priv(indio_dev);
-
-	iio_device_unregister(indio_dev);
-
-	if (st->chip_info->int_vref == 0) {
-		regulator_bulk_disable(ARRAY_SIZE(st->vref_reg), st->vref_reg);
-		regulator_bulk_free(ARRAY_SIZE(st->vref_reg), st->vref_reg);
-	}
-
-	iio_device_free(indio_dev);
-
-	return 0;
-}
-
-static const struct spi_device_id ad5764_ids[] = {
-	{ "ad5744", ID_AD5744 },
-	{ "ad5744r", ID_AD5744R },
-	{ "ad5764", ID_AD5764 },
-	{ "ad5764r", ID_AD5764R },
-	{ }
-};
-MODULE_DEVICE_TABLE(spi, ad5764_ids);
-
-static struct spi_driver ad5764_driver = {
-	.driver = {
-		.name = "ad5764",
-		.owner = THIS_MODULE,
-	},
-	.probe = ad5764_probe,
-	.remove = __devexit_p(ad5764_remove),
-	.id_table = ad5764_ids,
-};
-module_spi_driver(ad5764_driver);
-
-MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
-MODULE_DESCRIPTION("Analog Devices AD5744/AD5744R/AD5764/AD5764R DAC");
-MODULE_LICENSE("GPL v2");