[deliverable/linux.git] / drivers / staging / iio / dac / ad5446.c

/*
 * AD5446 SPI DAC driver
 *
 * Copyright 2010 Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later.
 */

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

#include "../iio.h"
#include "../sysfs.h"
#include "dac.h"

#include "ad5446.h"

static void ad5446_store_sample(struct ad5446_state *st, unsigned val)
{
	st->data.d16 = cpu_to_be16(AD5446_LOAD |
					(val << st->chip_info->left_shift));
}

static void ad5542_store_sample(struct ad5446_state *st, unsigned val)
{
	st->data.d16 = cpu_to_be16(val << st->chip_info->left_shift);
}

static void ad5620_store_sample(struct ad5446_state *st, unsigned val)
{
	st->data.d16 = cpu_to_be16(AD5620_LOAD |
					(val << st->chip_info->left_shift));
}

static void ad5660_store_sample(struct ad5446_state *st, unsigned val)
{
	val |= AD5660_LOAD;
	st->data.d24[0] = (val >> 16) & 0xFF;
	st->data.d24[1] = (val >> 8) & 0xFF;
	st->data.d24[2] = val & 0xFF;
}

static void ad5620_store_pwr_down(struct ad5446_state *st, unsigned mode)
{
	st->data.d16 = cpu_to_be16(mode << 14);
}

static void ad5660_store_pwr_down(struct ad5446_state *st, unsigned mode)
{
	unsigned val = mode << 16;

	st->data.d24[0] = (val >> 16) & 0xFF;
	st->data.d24[1] = (val >> 8) & 0xFF;
	st->data.d24[2] = val & 0xFF;
}

static ssize_t ad5446_write(struct device *dev,
		struct device_attribute *attr,
		const char *buf,
		size_t len)
{
	struct iio_dev *dev_info = dev_get_drvdata(dev);
	struct ad5446_state *st = iio_priv(dev_info);
	int ret;
	long val;

	ret = strict_strtol(buf, 10, &val);
	if (ret)
		goto error_ret;

	if (val > RES_MASK(st->chip_info->bits)) {
		ret = -EINVAL;
		goto error_ret;
	}

	mutex_lock(&dev_info->mlock);
	st->cached_val = val;
	st->chip_info->store_sample(st, val);
	ret = spi_sync(st->spi, &st->msg);
	mutex_unlock(&dev_info->mlock);

error_ret:
	return ret ? ret : len;
}

static IIO_DEV_ATTR_OUT_RAW(0, ad5446_write, 0);

static ssize_t ad5446_show_scale(struct device *dev,
				struct device_attribute *attr,
				char *buf)
{
	struct iio_dev *dev_info = dev_get_drvdata(dev);
	struct ad5446_state *st = iio_priv(dev_info);
	/* Corresponds to Vref / 2^(bits) */
	unsigned int scale_uv = (st->vref_mv * 1000) >> st->chip_info->bits;

	return sprintf(buf, "%d.%03d\n", scale_uv / 1000, scale_uv % 1000);
}
static IIO_DEVICE_ATTR(out_scale, S_IRUGO, ad5446_show_scale, NULL, 0);

static ssize_t ad5446_write_powerdown_mode(struct device *dev,
				       struct device_attribute *attr,
				       const char *buf, size_t len)
{
	struct iio_dev *dev_info = dev_get_drvdata(dev);
	struct ad5446_state *st = iio_priv(dev_info);

	if (sysfs_streq(buf, "1kohm_to_gnd"))
		st->pwr_down_mode = MODE_PWRDWN_1k;
	else if (sysfs_streq(buf, "100kohm_to_gnd"))
		st->pwr_down_mode = MODE_PWRDWN_100k;
	else if (sysfs_streq(buf, "three_state"))
		st->pwr_down_mode = MODE_PWRDWN_TRISTATE;
	else
		return -EINVAL;

	return len;
}

static ssize_t ad5446_read_powerdown_mode(struct device *dev,
				      struct device_attribute *attr, char *buf)
{
	struct iio_dev *dev_info = dev_get_drvdata(dev);
	struct ad5446_state *st = iio_priv(dev_info);

	char mode[][15] = {"", "1kohm_to_gnd", "100kohm_to_gnd", "three_state"};

	return sprintf(buf, "%s\n", mode[st->pwr_down_mode]);
}

static ssize_t ad5446_read_dac_powerdown(struct device *dev,
					   struct device_attribute *attr,
					   char *buf)
{
	struct iio_dev *dev_info = dev_get_drvdata(dev);
	struct ad5446_state *st = iio_priv(dev_info);

	return sprintf(buf, "%d\n", st->pwr_down);
}

static ssize_t ad5446_write_dac_powerdown(struct device *dev,
					    struct device_attribute *attr,
					    const char *buf, size_t len)
{
	struct iio_dev *dev_info = dev_get_drvdata(dev);
	struct ad5446_state *st = iio_priv(dev_info);
	unsigned long readin;
	int ret;

	ret = strict_strtol(buf, 10, &readin);
	if (ret)
		return ret;

	if (readin > 1)
		ret = -EINVAL;

	mutex_lock(&dev_info->mlock);
	st->pwr_down = readin;

	if (st->pwr_down)
		st->chip_info->store_pwr_down(st, st->pwr_down_mode);
	else
		st->chip_info->store_sample(st, st->cached_val);

	ret = spi_sync(st->spi, &st->msg);
	mutex_unlock(&dev_info->mlock);

	return ret ? ret : len;
}

static IIO_DEVICE_ATTR(out_powerdown_mode, S_IRUGO | S_IWUSR,
			ad5446_read_powerdown_mode,
			ad5446_write_powerdown_mode, 0);

static IIO_CONST_ATTR(out_powerdown_mode_available,
			"1kohm_to_gnd 100kohm_to_gnd three_state");

static IIO_DEVICE_ATTR(out0_powerdown, S_IRUGO | S_IWUSR,
			ad5446_read_dac_powerdown,
			ad5446_write_dac_powerdown, 0);

static struct attribute *ad5446_attributes[] = {
	&iio_dev_attr_out0_raw.dev_attr.attr,
	&iio_dev_attr_out_scale.dev_attr.attr,
	&iio_dev_attr_out0_powerdown.dev_attr.attr,
	&iio_dev_attr_out_powerdown_mode.dev_attr.attr,
	&iio_const_attr_out_powerdown_mode_available.dev_attr.attr,
	NULL,
};

static mode_t ad5446_attr_is_visible(struct kobject *kobj,
				     struct attribute *attr, int n)
{
	struct device *dev = container_of(kobj, struct device, kobj);
	struct iio_dev *dev_info = dev_get_drvdata(dev);
	struct ad5446_state *st = iio_priv(dev_info);

	mode_t mode = attr->mode;

	if (!st->chip_info->store_pwr_down &&
		(attr == &iio_dev_attr_out0_powerdown.dev_attr.attr ||
		attr == &iio_dev_attr_out_powerdown_mode.dev_attr.attr ||
		attr ==
		&iio_const_attr_out_powerdown_mode_available.dev_attr.attr))
		mode = 0;

	return mode;
}

static const struct attribute_group ad5446_attribute_group = {
	.attrs = ad5446_attributes,
	.is_visible = ad5446_attr_is_visible,
};

static const struct ad5446_chip_info ad5446_chip_info_tbl[] = {
	[ID_AD5444] = {
		.bits = 12,
		.storagebits = 16,
		.left_shift = 2,
		.store_sample = ad5446_store_sample,
	},
	[ID_AD5446] = {
		.bits = 14,
		.storagebits = 16,
		.left_shift = 0,
		.store_sample = ad5446_store_sample,
	},
	[ID_AD5541A] = {
		.bits = 16,
		.storagebits = 16,
		.left_shift = 0,
		.store_sample = ad5542_store_sample,
	},
	[ID_AD5542A] = {
		.bits = 16,
		.storagebits = 16,
		.left_shift = 0,
		.store_sample = ad5542_store_sample,
	},
	[ID_AD5543] = {
		.bits = 16,
		.storagebits = 16,
		.left_shift = 0,
		.store_sample = ad5542_store_sample,
	},
	[ID_AD5512A] = {
		.bits = 12,
		.storagebits = 16,
		.left_shift = 4,
		.store_sample = ad5542_store_sample,
	},
	[ID_AD5553] = {
		.bits = 14,
		.storagebits = 16,
		.left_shift = 0,
		.store_sample = ad5542_store_sample,
	},
	[ID_AD5601] = {
		.bits = 8,
		.storagebits = 16,
		.left_shift = 6,
		.store_sample = ad5542_store_sample,
		.store_pwr_down = ad5620_store_pwr_down,
	},
	[ID_AD5611] = {
		.bits = 10,
		.storagebits = 16,
		.left_shift = 4,
		.store_sample = ad5542_store_sample,
		.store_pwr_down = ad5620_store_pwr_down,
	},
	[ID_AD5621] = {
		.bits = 12,
		.storagebits = 16,
		.left_shift = 2,
		.store_sample = ad5542_store_sample,
		.store_pwr_down = ad5620_store_pwr_down,
	},
	[ID_AD5620_2500] = {
		.bits = 12,
		.storagebits = 16,
		.left_shift = 2,
		.int_vref_mv = 2500,
		.store_sample = ad5620_store_sample,
		.store_pwr_down = ad5620_store_pwr_down,
	},
	[ID_AD5620_1250] = {
		.bits = 12,
		.storagebits = 16,
		.left_shift = 2,
		.int_vref_mv = 1250,
		.store_sample = ad5620_store_sample,
		.store_pwr_down = ad5620_store_pwr_down,
	},
	[ID_AD5640_2500] = {
		.bits = 14,
		.storagebits = 16,
		.left_shift = 0,
		.int_vref_mv = 2500,
		.store_sample = ad5620_store_sample,
		.store_pwr_down = ad5620_store_pwr_down,
	},
	[ID_AD5640_1250] = {
		.bits = 14,
		.storagebits = 16,
		.left_shift = 0,
		.int_vref_mv = 1250,
		.store_sample = ad5620_store_sample,
		.store_pwr_down = ad5620_store_pwr_down,
	},
	[ID_AD5660_2500] = {
		.bits = 16,
		.storagebits = 24,
		.left_shift = 0,
		.int_vref_mv = 2500,
		.store_sample = ad5660_store_sample,
		.store_pwr_down = ad5660_store_pwr_down,
	},
	[ID_AD5660_1250] = {
		.bits = 16,
		.storagebits = 24,
		.left_shift = 0,
		.int_vref_mv = 1250,
		.store_sample = ad5660_store_sample,
		.store_pwr_down = ad5660_store_pwr_down,
	},
};

static const struct iio_info ad5446_info = {
	.attrs = &ad5446_attribute_group,
	.driver_module = THIS_MODULE,
};

static int __devinit ad5446_probe(struct spi_device *spi)
{
	struct ad5446_state *st;
	struct iio_dev *indio_dev;
	struct regulator *reg;
	int ret, voltage_uv = 0;

	reg = regulator_get(&spi->dev, "vcc");
	if (!IS_ERR(reg)) {
		ret = regulator_enable(reg);
		if (ret)
			goto error_put_reg;

		voltage_uv = regulator_get_voltage(reg);
	}

	indio_dev = iio_allocate_device(sizeof(*st));
	if (indio_dev == NULL) {
		ret = -ENOMEM;
		goto error_disable_reg;
	}
	st = iio_priv(indio_dev);
	st->chip_info =
		&ad5446_chip_info_tbl[spi_get_device_id(spi)->driver_data];

	spi_set_drvdata(spi, indio_dev);
	st->reg = reg;
	st->spi = spi;

	/* Estabilish 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->info = &ad5446_info;
	indio_dev->modes = INDIO_DIRECT_MODE;

	/* Setup default message */

	st->xfer.tx_buf = &st->data;
	st->xfer.len = st->chip_info->storagebits / 8;

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

	switch (spi_get_device_id(spi)->driver_data) {
	case ID_AD5620_2500:
	case ID_AD5620_1250:
	case ID_AD5640_2500:
	case ID_AD5640_1250:
	case ID_AD5660_2500:
	case ID_AD5660_1250:
		st->vref_mv = st->chip_info->int_vref_mv;
		break;
	default:
		if (voltage_uv)
			st->vref_mv = voltage_uv / 1000;
		else
			dev_warn(&spi->dev,
				 "reference voltage unspecified\n");
	}

	ret = iio_device_register(indio_dev);
	if (ret)
		goto error_free_device;

	return 0;

error_free_device:
	iio_free_device(indio_dev);
error_disable_reg:
	if (!IS_ERR(reg))
		regulator_disable(reg);
error_put_reg:
	if (!IS_ERR(reg))
		regulator_put(reg);

	return ret;
}

static int ad5446_remove(struct spi_device *spi)
{
	struct iio_dev *indio_dev = spi_get_drvdata(spi);
	struct ad5446_state *st = iio_priv(indio_dev);
	struct regulator *reg = st->reg;

	iio_device_unregister(indio_dev);
	if (!IS_ERR(reg)) {
		regulator_disable(reg);
		regulator_put(reg);
	}
	return 0;
}

static const struct spi_device_id ad5446_id[] = {
	{"ad5444", ID_AD5444},
	{"ad5446", ID_AD5446},
	{"ad5512a", ID_AD5512A},
	{"ad5541a", ID_AD5541A},
	{"ad5542a", ID_AD5542A},
	{"ad5543", ID_AD5543},
	{"ad5553", ID_AD5553},
	{"ad5601", ID_AD5601},
	{"ad5611", ID_AD5611},
	{"ad5621", ID_AD5621},
	{"ad5620-2500", ID_AD5620_2500}, /* AD5620/40/60: */
	{"ad5620-1250", ID_AD5620_1250}, /* part numbers may look differently */
	{"ad5640-2500", ID_AD5640_2500},
	{"ad5640-1250", ID_AD5640_1250},
	{"ad5660-2500", ID_AD5660_2500},
	{"ad5660-1250", ID_AD5660_1250},
	{}
};

static struct spi_driver ad5446_driver = {
	.driver = {
		.name	= "ad5446",
		.bus	= &spi_bus_type,
		.owner	= THIS_MODULE,
	},
	.probe		= ad5446_probe,
	.remove		= __devexit_p(ad5446_remove),
	.id_table	= ad5446_id,
};

static int __init ad5446_init(void)
{
	return spi_register_driver(&ad5446_driver);
}
module_init(ad5446_init);

static void __exit ad5446_exit(void)
{
	spi_unregister_driver(&ad5446_driver);
}
module_exit(ad5446_exit);

MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
MODULE_DESCRIPTION("Analog Devices AD5444/AD5446 DAC");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("spi:ad5446");
Commit	Line	Data
b5a49481 MH	1	/*
	2	* AD5446 SPI DAC 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/workqueue.h>
	11	#include <linux/device.h>
	12	#include <linux/kernel.h>
	13	#include <linux/slab.h>
	14	#include <linux/sysfs.h>
	15	#include <linux/list.h>
	16	#include <linux/spi/spi.h>
	17	#include <linux/regulator/consumer.h>
	18	#include <linux/err.h>
	19
	20	#include "../iio.h"
	21	#include "../sysfs.h"
	22	#include "dac.h"
	23
	24	#include "ad5446.h"
	25
d846263d MH	26	static void ad5446_store_sample(struct ad5446_state *st, unsigned val)
	27	{
	28	st->data.d16 = cpu_to_be16(AD5446_LOAD \|
	29	(val << st->chip_info->left_shift));
	30	}
	31
	32	static void ad5542_store_sample(struct ad5446_state *st, unsigned val)
	33	{
	34	st->data.d16 = cpu_to_be16(val << st->chip_info->left_shift);
	35	}
	36
	37	static void ad5620_store_sample(struct ad5446_state *st, unsigned val)
	38	{
	39	st->data.d16 = cpu_to_be16(AD5620_LOAD \|
	40	(val << st->chip_info->left_shift));
	41	}
	42
	43	static void ad5660_store_sample(struct ad5446_state *st, unsigned val)
	44	{
	45	val \|= AD5660_LOAD;
	46	st->data.d24[0] = (val >> 16) & 0xFF;
	47	st->data.d24[1] = (val >> 8) & 0xFF;
	48	st->data.d24[2] = val & 0xFF;
	49	}
	50
bbed4dc7 MH	51	static void ad5620_store_pwr_down(struct ad5446_state *st, unsigned mode)
	52	{
	53	st->data.d16 = cpu_to_be16(mode << 14);
	54	}
	55
	56	static void ad5660_store_pwr_down(struct ad5446_state *st, unsigned mode)
	57	{
	58	unsigned val = mode << 16;
	59
	60	st->data.d24[0] = (val >> 16) & 0xFF;
	61	st->data.d24[1] = (val >> 8) & 0xFF;
	62	st->data.d24[2] = val & 0xFF;
	63	}
	64
b5a49481 MH	65	static ssize_t ad5446_write(struct device *dev,
	66	struct device_attribute *attr,
	67	const char *buf,
	68	size_t len)
	69	{
	70	struct iio_dev *dev_info = dev_get_drvdata(dev);
86729fc4	71	struct ad5446_state *st = iio_priv(dev_info);
b5a49481 MH	72	int ret;
	73	long val;
	74
	75	ret = strict_strtol(buf, 10, &val);
	76	if (ret)
	77	goto error_ret;
	78
	79	if (val > RES_MASK(st->chip_info->bits)) {
	80	ret = -EINVAL;
	81	goto error_ret;
	82	}
	83
	84	mutex_lock(&dev_info->mlock);
bbed4dc7	85	st->cached_val = val;
d846263d	86	st->chip_info->store_sample(st, val);
b5a49481 MH	87	ret = spi_sync(st->spi, &st->msg);
	88	mutex_unlock(&dev_info->mlock);
	89
	90	error_ret:
	91	return ret ? ret : len;
	92	}
	93
	94	static IIO_DEV_ATTR_OUT_RAW(0, ad5446_write, 0);
	95
	96	static ssize_t ad5446_show_scale(struct device *dev,
	97	struct device_attribute *attr,
	98	char *buf)
	99	{
	100	struct iio_dev *dev_info = dev_get_drvdata(dev);
86729fc4	101	struct ad5446_state *st = iio_priv(dev_info);
b5a49481 MH	102	/* Corresponds to Vref / 2^(bits) */
	103	unsigned int scale_uv = (st->vref_mv * 1000) >> st->chip_info->bits;
	104
41135b1c	105	return sprintf(buf, "%d.%03d\n", scale_uv / 1000, scale_uv % 1000);
b5a49481 MH	106	}
	107	static IIO_DEVICE_ATTR(out_scale, S_IRUGO, ad5446_show_scale, NULL, 0);
	108
bbed4dc7 MH	109	static ssize_t ad5446_write_powerdown_mode(struct device *dev,
	110	struct device_attribute *attr,
	111	const char *buf, size_t len)
	112	{
	113	struct iio_dev *dev_info = dev_get_drvdata(dev);
86729fc4	114	struct ad5446_state *st = iio_priv(dev_info);
bbed4dc7 MH	115
	116	if (sysfs_streq(buf, "1kohm_to_gnd"))
	117	st->pwr_down_mode = MODE_PWRDWN_1k;
	118	else if (sysfs_streq(buf, "100kohm_to_gnd"))
	119	st->pwr_down_mode = MODE_PWRDWN_100k;
	120	else if (sysfs_streq(buf, "three_state"))
	121	st->pwr_down_mode = MODE_PWRDWN_TRISTATE;
	122	else
	123	return -EINVAL;
	124
	125	return len;
	126	}
	127
	128	static ssize_t ad5446_read_powerdown_mode(struct device *dev,
	129	struct device_attribute attr, char buf)
	130	{
	131	struct iio_dev *dev_info = dev_get_drvdata(dev);
86729fc4	132	struct ad5446_state *st = iio_priv(dev_info);
bbed4dc7 MH	133
	134	char mode[][15] = {"", "1kohm_to_gnd", "100kohm_to_gnd", "three_state"};
	135
	136	return sprintf(buf, "%s\n", mode[st->pwr_down_mode]);
	137	}
	138
	139	static ssize_t ad5446_read_dac_powerdown(struct device *dev,
	140	struct device_attribute *attr,
	141	char *buf)
	142	{
	143	struct iio_dev *dev_info = dev_get_drvdata(dev);
86729fc4	144	struct ad5446_state *st = iio_priv(dev_info);
bbed4dc7 MH	145
	146	return sprintf(buf, "%d\n", st->pwr_down);
	147	}
	148
	149	static ssize_t ad5446_write_dac_powerdown(struct device *dev,
	150	struct device_attribute *attr,
	151	const char *buf, size_t len)
	152	{
	153	struct iio_dev *dev_info = dev_get_drvdata(dev);
86729fc4	154	struct ad5446_state *st = iio_priv(dev_info);
bbed4dc7 MH	155	unsigned long readin;
	156	int ret;
	157
	158	ret = strict_strtol(buf, 10, &readin);
	159	if (ret)
	160	return ret;
	161
	162	if (readin > 1)
	163	ret = -EINVAL;
	164
	165	mutex_lock(&dev_info->mlock);
	166	st->pwr_down = readin;
	167
	168	if (st->pwr_down)
	169	st->chip_info->store_pwr_down(st, st->pwr_down_mode);
	170	else
	171	st->chip_info->store_sample(st, st->cached_val);
	172
	173	ret = spi_sync(st->spi, &st->msg);
	174	mutex_unlock(&dev_info->mlock);
	175
	176	return ret ? ret : len;
	177	}
	178
	179	static IIO_DEVICE_ATTR(out_powerdown_mode, S_IRUGO \| S_IWUSR,
	180	ad5446_read_powerdown_mode,
	181	ad5446_write_powerdown_mode, 0);
	182
	183	static IIO_CONST_ATTR(out_powerdown_mode_available,
	184	"1kohm_to_gnd 100kohm_to_gnd three_state");
	185
	186	static IIO_DEVICE_ATTR(out0_powerdown, S_IRUGO \| S_IWUSR,
	187	ad5446_read_dac_powerdown,
	188	ad5446_write_dac_powerdown, 0);
	189
b5a49481 MH	190	static struct attribute *ad5446_attributes[] = {
	191	&iio_dev_attr_out0_raw.dev_attr.attr,
	192	&iio_dev_attr_out_scale.dev_attr.attr,
bbed4dc7 MH	193	&iio_dev_attr_out0_powerdown.dev_attr.attr,
	194	&iio_dev_attr_out_powerdown_mode.dev_attr.attr,
	195	&iio_const_attr_out_powerdown_mode_available.dev_attr.attr,
b5a49481 MH	196	NULL,
	197	};
	198
bbed4dc7 MH	199	static mode_t ad5446_attr_is_visible(struct kobject *kobj,
	200	struct attribute *attr, int n)
	201	{
	202	struct device *dev = container_of(kobj, struct device, kobj);
	203	struct iio_dev *dev_info = dev_get_drvdata(dev);
86729fc4	204	struct ad5446_state *st = iio_priv(dev_info);
bbed4dc7 MH	205
	206	mode_t mode = attr->mode;
	207
	208	if (!st->chip_info->store_pwr_down &&
	209	(attr == &iio_dev_attr_out0_powerdown.dev_attr.attr \|\|
	210	attr == &iio_dev_attr_out_powerdown_mode.dev_attr.attr \|\|
	211	attr ==
	212	&iio_const_attr_out_powerdown_mode_available.dev_attr.attr))
	213	mode = 0;
	214
	215	return mode;
	216	}
	217
b5a49481 MH	218	static const struct attribute_group ad5446_attribute_group = {
b5a49481 MH	219	.attrs = ad5446_attributes,
bbed4dc7	220	.is_visible = ad5446_attr_is_visible,
b5a49481 MH	221	};
	222
	223	static const struct ad5446_chip_info ad5446_chip_info_tbl[] = {
	224	[ID_AD5444] = {
	225	.bits = 12,
	226	.storagebits = 16,
	227	.left_shift = 2,
d846263d	228	.store_sample = ad5446_store_sample,
b5a49481 MH	229	},
	230	[ID_AD5446] = {
	231	.bits = 14,
	232	.storagebits = 16,
	233	.left_shift = 0,
d846263d	234	.store_sample = ad5446_store_sample,
b5a49481	235	},
67d1c1f4 MH	236	[ID_AD5541A] = {
	237	.bits = 16,
	238	.storagebits = 16,
	239	.left_shift = 0,
	240	.store_sample = ad5542_store_sample,
	241	},
b5a49481 MH	242	[ID_AD5542A] = {
	243	.bits = 16,
	244	.storagebits = 16,
	245	.left_shift = 0,
d846263d	246	.store_sample = ad5542_store_sample,
b5a49481	247	},
0772268a MH	248	[ID_AD5543] = {
	249	.bits = 16,
	250	.storagebits = 16,
	251	.left_shift = 0,
	252	.store_sample = ad5542_store_sample,
	253	},
b5a49481 MH	254	[ID_AD5512A] = {
	255	.bits = 12,
	256	.storagebits = 16,
	257	.left_shift = 4,
d846263d MH	258	.store_sample = ad5542_store_sample,
d846263d MH	259	},
0772268a MH	260	[ID_AD5553] = {
	261	.bits = 14,
	262	.storagebits = 16,
	263	.left_shift = 0,
	264	.store_sample = ad5542_store_sample,
	265	},
2b61535a MH	266	[ID_AD5601] = {
	267	.bits = 8,
	268	.storagebits = 16,
	269	.left_shift = 6,
	270	.store_sample = ad5542_store_sample,
	271	.store_pwr_down = ad5620_store_pwr_down,
	272	},
	273	[ID_AD5611] = {
	274	.bits = 10,
	275	.storagebits = 16,
	276	.left_shift = 4,
	277	.store_sample = ad5542_store_sample,
	278	.store_pwr_down = ad5620_store_pwr_down,
	279	},
	280	[ID_AD5621] = {
	281	.bits = 12,
	282	.storagebits = 16,
	283	.left_shift = 2,
	284	.store_sample = ad5542_store_sample,
	285	.store_pwr_down = ad5620_store_pwr_down,
	286	},
d846263d MH	287	[ID_AD5620_2500] = {
	288	.bits = 12,
	289	.storagebits = 16,
	290	.left_shift = 2,
d846263d MH	291	.int_vref_mv = 2500,
d846263d MH	292	.store_sample = ad5620_store_sample,
bbed4dc7	293	.store_pwr_down = ad5620_store_pwr_down,
d846263d MH	294	},
	295	[ID_AD5620_1250] = {
	296	.bits = 12,
	297	.storagebits = 16,
	298	.left_shift = 2,
d846263d MH	299	.int_vref_mv = 1250,
d846263d MH	300	.store_sample = ad5620_store_sample,
bbed4dc7	301	.store_pwr_down = ad5620_store_pwr_down,
d846263d MH	302	},
	303	[ID_AD5640_2500] = {
	304	.bits = 14,
	305	.storagebits = 16,
	306	.left_shift = 0,
d846263d MH	307	.int_vref_mv = 2500,
d846263d MH	308	.store_sample = ad5620_store_sample,
bbed4dc7	309	.store_pwr_down = ad5620_store_pwr_down,
d846263d MH	310	},
	311	[ID_AD5640_1250] = {
	312	.bits = 14,
	313	.storagebits = 16,
	314	.left_shift = 0,
d846263d MH	315	.int_vref_mv = 1250,
d846263d MH	316	.store_sample = ad5620_store_sample,
bbed4dc7	317	.store_pwr_down = ad5620_store_pwr_down,
d846263d MH	318	},
	319	[ID_AD5660_2500] = {
	320	.bits = 16,
	321	.storagebits = 24,
	322	.left_shift = 0,
d846263d MH	323	.int_vref_mv = 2500,
d846263d MH	324	.store_sample = ad5660_store_sample,
bbed4dc7	325	.store_pwr_down = ad5660_store_pwr_down,
d846263d MH	326	},
	327	[ID_AD5660_1250] = {
	328	.bits = 16,
	329	.storagebits = 24,
	330	.left_shift = 0,
d846263d MH	331	.int_vref_mv = 1250,
d846263d MH	332	.store_sample = ad5660_store_sample,
bbed4dc7	333	.store_pwr_down = ad5660_store_pwr_down,
b5a49481 MH	334	},
	335	};
	336
6fe8135f JC	337	static const struct iio_info ad5446_info = {
	338	.attrs = &ad5446_attribute_group,
	339	.driver_module = THIS_MODULE,
	340	};
	341
b5a49481 MH	342	static int __devinit ad5446_probe(struct spi_device *spi)
	343	{
	344	struct ad5446_state *st;
86729fc4 JC	345	struct iio_dev *indio_dev;
86729fc4 JC	346	struct regulator *reg;
b5a49481 MH	347	int ret, voltage_uv = 0;
b5a49481 MH	348
86729fc4 JC	349	reg = regulator_get(&spi->dev, "vcc");
	350	if (!IS_ERR(reg)) {
	351	ret = regulator_enable(reg);
b5a49481 MH	352	if (ret)
	353	goto error_put_reg;
	354
86729fc4	355	voltage_uv = regulator_get_voltage(reg);
b5a49481 MH	356	}
b5a49481 MH	357
86729fc4 JC	358	indio_dev = iio_allocate_device(sizeof(*st));
	359	if (indio_dev == NULL) {
	360	ret = -ENOMEM;
	361	goto error_disable_reg;
	362	}
	363	st = iio_priv(indio_dev);
b5a49481 MH	364	st->chip_info =
	365	&ad5446_chip_info_tbl[spi_get_device_id(spi)->driver_data];
	366
86729fc4 JC	367	spi_set_drvdata(spi, indio_dev);
86729fc4 JC	368	st->reg = reg;
b5a49481 MH	369	st->spi = spi;
b5a49481 MH	370
b5a49481	371	/* Estabilish that the iio_dev is a child of the spi device */
86729fc4 JC	372	indio_dev->dev.parent = &spi->dev;
	373	indio_dev->name = spi_get_device_id(spi)->name;
	374	indio_dev->info = &ad5446_info;
	375	indio_dev->modes = INDIO_DIRECT_MODE;
b5a49481 MH	376
	377	/* Setup default message */
	378
d846263d MH	379	st->xfer.tx_buf = &st->data;
d846263d MH	380	st->xfer.len = st->chip_info->storagebits / 8;
b5a49481 MH	381
	382	spi_message_init(&st->msg);
	383	spi_message_add_tail(&st->xfer, &st->msg);
	384
d846263d	385	switch (spi_get_device_id(spi)->driver_data) {
bbed4dc7 MH	386	case ID_AD5620_2500:
	387	case ID_AD5620_1250:
	388	case ID_AD5640_2500:
	389	case ID_AD5640_1250:
	390	case ID_AD5660_2500:
	391	case ID_AD5660_1250:
	392	st->vref_mv = st->chip_info->int_vref_mv;
	393	break;
	394	default:
	395	if (voltage_uv)
	396	st->vref_mv = voltage_uv / 1000;
	397	else
	398	dev_warn(&spi->dev,
	399	"reference voltage unspecified\n");
d846263d	400	}
b5a49481	401
86729fc4	402	ret = iio_device_register(indio_dev);
b5a49481 MH	403	if (ret)
	404	goto error_free_device;
	405
	406	return 0;
	407
	408	error_free_device:
86729fc4	409	iio_free_device(indio_dev);
b5a49481	410	error_disable_reg:
86729fc4 JC	411	if (!IS_ERR(reg))
86729fc4 JC	412	regulator_disable(reg);
b5a49481	413	error_put_reg:
86729fc4 JC	414	if (!IS_ERR(reg))
	415	regulator_put(reg);
	416
b5a49481 MH	417	return ret;
	418	}
	419
	420	static int ad5446_remove(struct spi_device *spi)
	421	{
86729fc4 JC	422	struct iio_dev *indio_dev = spi_get_drvdata(spi);
	423	struct ad5446_state *st = iio_priv(indio_dev);
	424	struct regulator *reg = st->reg;
b5a49481 MH	425
b5a49481 MH	426	iio_device_unregister(indio_dev);
86729fc4 JC	427	if (!IS_ERR(reg)) {
	428	regulator_disable(reg);
	429	regulator_put(reg);
b5a49481	430	}
b5a49481 MH	431	return 0;
	432	}
	433
	434	static const struct spi_device_id ad5446_id[] = {
	435	{"ad5444", ID_AD5444},
	436	{"ad5446", ID_AD5446},
b5a49481	437	{"ad5512a", ID_AD5512A},
67d1c1f4	438	{"ad5541a", ID_AD5541A},
bd51c0b0 MH	439	{"ad5542a", ID_AD5542A},
	440	{"ad5543", ID_AD5543},
	441	{"ad5553", ID_AD5553},
2b61535a MH	442	{"ad5601", ID_AD5601},
	443	{"ad5611", ID_AD5611},
	444	{"ad5621", ID_AD5621},
d846263d MH	445	{"ad5620-2500", ID_AD5620_2500}, /* AD5620/40/60: */
	446	{"ad5620-1250", ID_AD5620_1250}, /* part numbers may look differently */
	447	{"ad5640-2500", ID_AD5640_2500},
	448	{"ad5640-1250", ID_AD5640_1250},
	449	{"ad5660-2500", ID_AD5660_2500},
	450	{"ad5660-1250", ID_AD5660_1250},
b5a49481 MH	451	{}
	452	};
	453
	454	static struct spi_driver ad5446_driver = {
	455	.driver = {
	456	.name = "ad5446",
	457	.bus = &spi_bus_type,
	458	.owner = THIS_MODULE,
	459	},
	460	.probe = ad5446_probe,
	461	.remove = __devexit_p(ad5446_remove),
	462	.id_table = ad5446_id,
	463	};
	464
	465	static int __init ad5446_init(void)
	466	{
	467	return spi_register_driver(&ad5446_driver);
	468	}
	469	module_init(ad5446_init);
	470
	471	static void __exit ad5446_exit(void)
	472	{
	473	spi_unregister_driver(&ad5446_driver);
	474	}
	475	module_exit(ad5446_exit);
	476
	477	MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
	478	MODULE_DESCRIPTION("Analog Devices AD5444/AD5446 DAC");
	479	MODULE_LICENSE("GPL v2");
	480	MODULE_ALIAS("spi:ad5446");