1 files changed, 0 insertions, 571 deletions

diff --git a/drivers/staging/iio/dac/ad5360.c b/drivers/staging/iio/dac/ad5360.c
deleted file mode 100644
index 38660efca78a..000000000000
--- a/drivers/staging/iio/dac/ad5360.c
+++ /dev/null
@@ -1,571 +0,0 @@
-/*
- * Analog devices AD5360, AD5361, AD5362, AD5363, AD5370, AD5371, AD5373
- * multi-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 AD5360_CMD(x)				((x) << 22)
-#define AD5360_ADDR(x)				((x) << 16)
-
-#define AD5360_READBACK_TYPE(x)			((x) << 13)
-#define AD5360_READBACK_ADDR(x)			((x) << 7)
-
-#define AD5360_CHAN_ADDR(chan)			((chan) + 0x8)
-
-#define AD5360_CMD_WRITE_DATA			0x3
-#define AD5360_CMD_WRITE_OFFSET			0x2
-#define AD5360_CMD_WRITE_GAIN			0x1
-#define AD5360_CMD_SPECIAL_FUNCTION		0x0
-
-/* Special function register addresses */
-#define AD5360_REG_SF_NOP			0x0
-#define AD5360_REG_SF_CTRL			0x1
-#define AD5360_REG_SF_OFS(x)			(0x2 + (x))
-#define AD5360_REG_SF_READBACK			0x5
-
-#define AD5360_SF_CTRL_PWR_DOWN			BIT(0)
-
-#define AD5360_READBACK_X1A			0x0
-#define AD5360_READBACK_X1B			0x1
-#define AD5360_READBACK_OFFSET			0x2
-#define AD5360_READBACK_GAIN			0x3
-#define AD5360_READBACK_SF			0x4
-
-
-/**
- * struct ad5360_chip_info - chip specific information
- * @channel_template:	channel specification template
- * @num_channels:	number of channels
- * @channels_per_group:	number of channels per group
- * @num_vrefs:		number of vref supplies for the chip
-*/
-
-struct ad5360_chip_info {
-	struct iio_chan_spec	channel_template;
-	unsigned int		num_channels;
-	unsigned int		channels_per_group;
-	unsigned int		num_vrefs;
-};
-
-/**
- * struct ad5360_state - driver instance specific data
- * @spi:		spi_device
- * @chip_info:		chip model specific constants, available modes etc
- * @vref_reg:		vref supply regulators
- * @ctrl:		control register cache
- * @data:		spi transfer buffers
- */
-
-struct ad5360_state {
-	struct spi_device		*spi;
-	const struct ad5360_chip_info	*chip_info;
-	struct regulator_bulk_data	vref_reg[3];
-	unsigned int			ctrl;
-
-	/*
-	 * 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 ad5360_type {
-	ID_AD5360,
-	ID_AD5361,
-	ID_AD5362,
-	ID_AD5363,
-	ID_AD5370,
-	ID_AD5371,
-	ID_AD5372,
-	ID_AD5373,
-};
-
-#define AD5360_CHANNEL(bits) {					\
-	.type = IIO_VOLTAGE,					\
-	.indexed = 1,						\
-	.output = 1,						\
-	.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |		\
-		IIO_CHAN_INFO_SCALE_SEPARATE_BIT |		\
-		IIO_CHAN_INFO_OFFSET_SEPARATE_BIT |		\
-		IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |	\
-		IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,	\
-	.scan_type = IIO_ST('u', (bits), 16, 16 - (bits))	\
-}
-
-static const struct ad5360_chip_info ad5360_chip_info_tbl[] = {
-	[ID_AD5360] = {
-		.channel_template = AD5360_CHANNEL(16),
-		.num_channels = 16,
-		.channels_per_group = 8,
-		.num_vrefs = 2,
-	},
-	[ID_AD5361] = {
-		.channel_template = AD5360_CHANNEL(14),
-		.num_channels = 16,
-		.channels_per_group = 8,
-		.num_vrefs = 2,
-	},
-	[ID_AD5362] = {
-		.channel_template = AD5360_CHANNEL(16),
-		.num_channels = 8,
-		.channels_per_group = 4,
-		.num_vrefs = 2,
-	},
-	[ID_AD5363] = {
-		.channel_template = AD5360_CHANNEL(14),
-		.num_channels = 8,
-		.channels_per_group = 4,
-		.num_vrefs = 2,
-	},
-	[ID_AD5370] = {
-		.channel_template = AD5360_CHANNEL(16),
-		.num_channels = 40,
-		.channels_per_group = 8,
-		.num_vrefs = 2,
-	},
-	[ID_AD5371] = {
-		.channel_template = AD5360_CHANNEL(14),
-		.num_channels = 40,
-		.channels_per_group = 8,
-		.num_vrefs = 3,
-	},
-	[ID_AD5372] = {
-		.channel_template = AD5360_CHANNEL(16),
-		.num_channels = 32,
-		.channels_per_group = 8,
-		.num_vrefs = 2,
-	},
-	[ID_AD5373] = {
-		.channel_template = AD5360_CHANNEL(14),
-		.num_channels = 32,
-		.channels_per_group = 8,
-		.num_vrefs = 2,
-	},
-};
-
-static unsigned int ad5360_get_channel_vref_index(struct ad5360_state *st,
-	unsigned int channel)
-{
-	unsigned int i;
-
-	/* The first groups have their own vref, while the remaining groups
-	 * share the last vref */
-	i = channel / st->chip_info->channels_per_group;
-	if (i >= st->chip_info->num_vrefs)
-		i = st->chip_info->num_vrefs - 1;
-
-	return i;
-}
-
-static int ad5360_get_channel_vref(struct ad5360_state *st,
-	unsigned int channel)
-{
-	unsigned int i = ad5360_get_channel_vref_index(st, channel);
-
-	return regulator_get_voltage(st->vref_reg[i].consumer);
-}
-
-
-static int ad5360_write_unlocked(struct iio_dev *indio_dev,
-	unsigned int cmd, unsigned int addr, unsigned int val,
-	unsigned int shift)
-{
-	struct ad5360_state *st = iio_priv(indio_dev);
-
-	val <<= shift;
-	val |= AD5360_CMD(cmd) | AD5360_ADDR(addr);
-	st->data[0].d32 = cpu_to_be32(val);
-
-	return spi_write(st->spi, &st->data[0].d8[1], 3);
-}
-
-static int ad5360_write(struct iio_dev *indio_dev, unsigned int cmd,
-	unsigned int addr, unsigned int val, unsigned int shift)
-{
-	int ret;
-
-	mutex_lock(&indio_dev->mlock);
-	ret = ad5360_write_unlocked(indio_dev, cmd, addr, val, shift);
-	mutex_unlock(&indio_dev->mlock);
-
-	return ret;
-}
-
-static int ad5360_read(struct iio_dev *indio_dev, unsigned int type,
-	unsigned int addr)
-{
-	struct ad5360_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(AD5360_CMD(AD5360_CMD_SPECIAL_FUNCTION) |
-		AD5360_ADDR(AD5360_REG_SF_READBACK) |
-		AD5360_READBACK_TYPE(type) |
-		AD5360_READBACK_ADDR(addr));
-
-	ret = spi_sync(st->spi, &m);
-	if (ret >= 0)
-		ret = be32_to_cpu(st->data[1].d32) & 0xffff;
-
-	mutex_unlock(&indio_dev->mlock);
-
-	return ret;
-}
-
-static ssize_t ad5360_read_dac_powerdown(struct device *dev,
-					   struct device_attribute *attr,
-					   char *buf)
-{
-	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
-	struct ad5360_state *st = iio_priv(indio_dev);
-
-	return sprintf(buf, "%d\n", (bool)(st->ctrl & AD5360_SF_CTRL_PWR_DOWN));
-}
-
-static int ad5360_update_ctrl(struct iio_dev *indio_dev, unsigned int set,
-	unsigned int clr)
-{
-	struct ad5360_state *st = iio_priv(indio_dev);
-	unsigned int ret;
-
-	mutex_lock(&indio_dev->mlock);
-
-	st->ctrl |= set;
-	st->ctrl &= ~clr;
-
-	ret = ad5360_write_unlocked(indio_dev, AD5360_CMD_SPECIAL_FUNCTION,
-			AD5360_REG_SF_CTRL, st->ctrl, 0);
-
-	mutex_unlock(&indio_dev->mlock);
-
-	return ret;
-}
-
-static ssize_t ad5360_write_dac_powerdown(struct device *dev,
-	struct device_attribute *attr, const char *buf, size_t len)
-{
-	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
-	bool pwr_down;
-	int ret;
-
-	ret = strtobool(buf, &pwr_down);
-	if (ret)
-		return ret;
-
-	if (pwr_down)
-		ret = ad5360_update_ctrl(indio_dev, AD5360_SF_CTRL_PWR_DOWN, 0);
-	else
-		ret = ad5360_update_ctrl(indio_dev, 0, AD5360_SF_CTRL_PWR_DOWN);
-
-	return ret ? ret : len;
-}
-
-static IIO_DEVICE_ATTR(out_voltage_powerdown,
-			S_IRUGO | S_IWUSR,
-			ad5360_read_dac_powerdown,
-			ad5360_write_dac_powerdown, 0);
-
-static struct attribute *ad5360_attributes[] = {
-	&iio_dev_attr_out_voltage_powerdown.dev_attr.attr,
-	NULL,
-};
-
-static const struct attribute_group ad5360_attribute_group = {
-	.attrs = ad5360_attributes,
-};
-
-static int ad5360_write_raw(struct iio_dev *indio_dev,
-			       struct iio_chan_spec const *chan,
-			       int val,
-			       int val2,
-			       long mask)
-{
-	struct ad5360_state *st = iio_priv(indio_dev);
-	int max_val = (1 << chan->scan_type.realbits);
-	unsigned int ofs_index;
-
-	switch (mask) {
-	case IIO_CHAN_INFO_RAW:
-		if (val >= max_val || val < 0)
-			return -EINVAL;
-
-		return ad5360_write(indio_dev, AD5360_CMD_WRITE_DATA,
-				 chan->address, val, chan->scan_type.shift);
-
-	case IIO_CHAN_INFO_CALIBBIAS:
-		if (val >= max_val || val < 0)
-			return -EINVAL;
-
-		return ad5360_write(indio_dev, AD5360_CMD_WRITE_OFFSET,
-				 chan->address, val, chan->scan_type.shift);
-
-	case IIO_CHAN_INFO_CALIBSCALE:
-		if (val >= max_val || val < 0)
-			return -EINVAL;
-
-		return ad5360_write(indio_dev, AD5360_CMD_WRITE_GAIN,
-				 chan->address, val, chan->scan_type.shift);
-
-	case IIO_CHAN_INFO_OFFSET:
-		if (val <= -max_val || val > 0)
-			return -EINVAL;
-
-		val = -val;
-
-		/* offset is supposed to have the same scale as raw, but it
-		 * is always 14bits wide, so on a chip where the raw value has
-		 * more bits, we need to shift offset. */
-		val >>= (chan->scan_type.realbits - 14);
-
-		/* There is one DAC offset register per vref. Changing one
-		 * channels offset will also change the offset for all other
-		 * channels which share the same vref supply. */
-		ofs_index = ad5360_get_channel_vref_index(st, chan->channel);
-		return ad5360_write(indio_dev, AD5360_CMD_SPECIAL_FUNCTION,
-				 AD5360_REG_SF_OFS(ofs_index), val, 0);
-	default:
-		break;
-	}
-
-	return -EINVAL;
-}
-
-static int ad5360_read_raw(struct iio_dev *indio_dev,
-			   struct iio_chan_spec const *chan,
-			   int *val,
-			   int *val2,
-			   long m)
-{
-	struct ad5360_state *st = iio_priv(indio_dev);
-	unsigned int ofs_index;
-	int scale_uv;
-	int ret;
-
-	switch (m) {
-	case IIO_CHAN_INFO_RAW:
-		ret = ad5360_read(indio_dev, AD5360_READBACK_X1A,
-			chan->address);
-		if (ret < 0)
-			return ret;
-		*val = ret >> chan->scan_type.shift;
-		return IIO_VAL_INT;
-	case IIO_CHAN_INFO_SCALE:
-		/* vout = 4 * vref * dac_code */
-		scale_uv = ad5360_get_channel_vref(st, chan->channel) * 4 * 100;
-		if (scale_uv < 0)
-			return scale_uv;
-
-		scale_uv >>= (chan->scan_type.realbits);
-		*val =  scale_uv / 100000;
-		*val2 = (scale_uv % 100000) * 10;
-		return IIO_VAL_INT_PLUS_MICRO;
-	case IIO_CHAN_INFO_CALIBBIAS:
-		ret = ad5360_read(indio_dev, AD5360_READBACK_OFFSET,
-			chan->address);
-		if (ret < 0)
-			return ret;
-		*val = ret;
-		return IIO_VAL_INT;
-	case IIO_CHAN_INFO_CALIBSCALE:
-		ret = ad5360_read(indio_dev, AD5360_READBACK_GAIN,
-			chan->address);
-		if (ret < 0)
-			return ret;
-		*val = ret;
-		return IIO_VAL_INT;
-	case IIO_CHAN_INFO_OFFSET:
-		ofs_index = ad5360_get_channel_vref_index(st, chan->channel);
-		ret = ad5360_read(indio_dev, AD5360_READBACK_SF,
-			AD5360_REG_SF_OFS(ofs_index));
-		if (ret < 0)
-			return ret;
-
-		ret <<= (chan->scan_type.realbits - 14);
-		*val = -ret;
-		return IIO_VAL_INT;
-	}
-
-	return -EINVAL;
-}
-
-static const struct iio_info ad5360_info = {
-	.read_raw = ad5360_read_raw,
-	.write_raw = ad5360_write_raw,
-	.attrs = &ad5360_attribute_group,
-	.driver_module = THIS_MODULE,
-};
-
-static const char * const ad5360_vref_name[] = {
-	 "vref0", "vref1", "vref2"
-};
-
-static int __devinit ad5360_alloc_channels(struct iio_dev *indio_dev)
-{
-	struct ad5360_state *st = iio_priv(indio_dev);
-	struct iio_chan_spec *channels;
-	unsigned int i;
-
-	channels = kcalloc(st->chip_info->num_channels,
-			   sizeof(struct iio_chan_spec), GFP_KERNEL);
-
-	if (!channels)
-		return -ENOMEM;
-
-	for (i = 0; i < st->chip_info->num_channels; ++i) {
-		channels[i] = st->chip_info->channel_template;
-		channels[i].channel = i;
-		channels[i].address = AD5360_CHAN_ADDR(i);
-	}
-
-	indio_dev->channels = channels;
-
-	return 0;
-}
-
-static int __devinit ad5360_probe(struct spi_device *spi)
-{
-	enum ad5360_type type = spi_get_device_id(spi)->driver_data;
-	struct iio_dev *indio_dev;
-	struct ad5360_state *st;
-	unsigned int i;
-	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->chip_info = &ad5360_chip_info_tbl[type];
-	st->spi = spi;
-
-	indio_dev->dev.parent = &spi->dev;
-	indio_dev->name = spi_get_device_id(spi)->name;
-	indio_dev->info = &ad5360_info;
-	indio_dev->modes = INDIO_DIRECT_MODE;
-	indio_dev->num_channels = st->chip_info->num_channels;
-
-	ret = ad5360_alloc_channels(indio_dev);
-	if (ret) {
-		dev_err(&spi->dev, "Failed to allocate channel spec: %d\n", ret);
-		goto error_free;
-	}
-
-	for (i = 0; i < st->chip_info->num_vrefs; ++i)
-		st->vref_reg[i].supply = ad5360_vref_name[i];
-
-	ret = regulator_bulk_get(&st->spi->dev, st->chip_info->num_vrefs,
-		st->vref_reg);
-	if (ret) {
-		dev_err(&spi->dev, "Failed to request vref regulators: %d\n", ret);
-		goto error_free_channels;
-	}
-
-	ret = regulator_bulk_enable(st->chip_info->num_vrefs, 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:
-	regulator_bulk_disable(st->chip_info->num_vrefs, st->vref_reg);
-error_free_reg:
-	regulator_bulk_free(st->chip_info->num_vrefs, st->vref_reg);
-error_free_channels:
-	kfree(indio_dev->channels);
-error_free:
-	iio_device_free(indio_dev);
-
-	return ret;
-}
-
-static int __devexit ad5360_remove(struct spi_device *spi)
-{
-	struct iio_dev *indio_dev = spi_get_drvdata(spi);
-	struct ad5360_state *st = iio_priv(indio_dev);
-
-	iio_device_unregister(indio_dev);
-
-	kfree(indio_dev->channels);
-
-	regulator_bulk_disable(st->chip_info->num_vrefs, st->vref_reg);
-	regulator_bulk_free(st->chip_info->num_vrefs, st->vref_reg);
-
-	iio_device_free(indio_dev);
-
-	return 0;
-}
-
-static const struct spi_device_id ad5360_ids[] = {
-	{ "ad5360", ID_AD5360 },
-	{ "ad5361", ID_AD5361 },
-	{ "ad5362", ID_AD5362 },
-	{ "ad5363", ID_AD5363 },
-	{ "ad5370", ID_AD5370 },
-	{ "ad5371", ID_AD5371 },
-	{ "ad5372", ID_AD5372 },
-	{ "ad5373", ID_AD5373 },
-	{}
-};
-MODULE_DEVICE_TABLE(spi, ad5360_ids);
-
-static struct spi_driver ad5360_driver = {
-	.driver = {
-		   .name = "ad5360",
-		   .owner = THIS_MODULE,
-	},
-	.probe = ad5360_probe,
-	.remove = __devexit_p(ad5360_remove),
-	.id_table = ad5360_ids,
-};
-module_spi_driver(ad5360_driver);
-
-MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
-MODULE_DESCRIPTION("Analog Devices AD5360/61/62/63/70/71/72/73 DAC");
-MODULE_LICENSE("GPL v2");