[mirror_ubuntu-hirsute-kernel.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 <linux/module.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 *indio_dev = dev_get_drvdata(dev);
	struct ad5446_state *st = iio_priv(indio_dev);
	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(&indio_dev->mlock);
	st->cached_val = val;
	st->chip_info->store_sample(st, val);
	ret = spi_sync(st->spi, &st->msg);
	mutex_unlock(&indio_dev->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 *indio_dev = dev_get_drvdata(dev);
	struct ad5446_state *st = iio_priv(indio_dev);
	/* 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_voltage_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 *indio_dev = dev_get_drvdata(dev);
	struct ad5446_state *st = iio_priv(indio_dev);

	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 *indio_dev = dev_get_drvdata(dev);
	struct ad5446_state *st = iio_priv(indio_dev);

	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 *indio_dev = dev_get_drvdata(dev);
	struct ad5446_state *st = iio_priv(indio_dev);

	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 *indio_dev = dev_get_drvdata(dev);
	struct ad5446_state *st = iio_priv(indio_dev);
	unsigned long readin;
	int ret;

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

	if (readin > 1)
		ret = -EINVAL;

	mutex_lock(&indio_dev->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(&indio_dev->mlock);

	return ret ? ret : len;
}

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

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

static IIO_DEVICE_ATTR(out_voltage0_powerdown, S_IRUGO | S_IWUSR,
			ad5446_read_dac_powerdown,
			ad5446_write_dac_powerdown, 0);

static struct attribute *ad5446_attributes[] = {
	&iio_dev_attr_out_voltage0_raw.dev_attr.attr,
	&iio_dev_attr_out_voltage_scale.dev_attr.attr,
	&iio_dev_attr_out_voltage0_powerdown.dev_attr.attr,
	&iio_dev_attr_out_voltage_powerdown_mode.dev_attr.attr,
	&iio_const_attr_out_voltage_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 *indio_dev = dev_get_drvdata(dev);
	struct ad5446_state *st = iio_priv(indio_dev);

	mode_t mode = attr->mode;

	if (!st->chip_info->store_pwr_down &&
		(attr == &iio_dev_attr_out_voltage0_powerdown.dev_attr.attr ||
		attr == &iio_dev_attr_out_voltage_powerdown_mode.
		 dev_attr.attr ||
		attr ==
		&iio_const_attr_out_voltage_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);

	iio_device_unregister(indio_dev);
	if (!IS_ERR(st->reg)) {
		regulator_disable(st->reg);
		regulator_put(st->reg);
	}
	iio_free_device(indio_dev);

	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>
99c97852	19	#include <linux/module.h>
b5a49481 MH	20
	21	#include "../iio.h"
	22	#include "../sysfs.h"
	23	#include "dac.h"
	24
	25	#include "ad5446.h"
	26
d846263d MH	27	static void ad5446_store_sample(struct ad5446_state *st, unsigned val)
	28	{
	29	st->data.d16 = cpu_to_be16(AD5446_LOAD \|
	30	(val << st->chip_info->left_shift));
	31	}
	32
	33	static void ad5542_store_sample(struct ad5446_state *st, unsigned val)
	34	{
	35	st->data.d16 = cpu_to_be16(val << st->chip_info->left_shift);
	36	}
	37
	38	static void ad5620_store_sample(struct ad5446_state *st, unsigned val)
	39	{
	40	st->data.d16 = cpu_to_be16(AD5620_LOAD \|
	41	(val << st->chip_info->left_shift));
	42	}
	43
	44	static void ad5660_store_sample(struct ad5446_state *st, unsigned val)
	45	{
	46	val \|= AD5660_LOAD;
	47	st->data.d24[0] = (val >> 16) & 0xFF;
	48	st->data.d24[1] = (val >> 8) & 0xFF;
	49	st->data.d24[2] = val & 0xFF;
	50	}
	51
bbed4dc7 MH	52	static void ad5620_store_pwr_down(struct ad5446_state *st, unsigned mode)
	53	{
	54	st->data.d16 = cpu_to_be16(mode << 14);
	55	}
	56
	57	static void ad5660_store_pwr_down(struct ad5446_state *st, unsigned mode)
	58	{
	59	unsigned val = mode << 16;
	60
	61	st->data.d24[0] = (val >> 16) & 0xFF;
	62	st->data.d24[1] = (val >> 8) & 0xFF;
	63	st->data.d24[2] = val & 0xFF;
	64	}
	65
b5a49481 MH	66	static ssize_t ad5446_write(struct device *dev,
	67	struct device_attribute *attr,
	68	const char *buf,
	69	size_t len)
	70	{
638e59fc JC	71	struct iio_dev *indio_dev = dev_get_drvdata(dev);
638e59fc JC	72	struct ad5446_state *st = iio_priv(indio_dev);
b5a49481 MH	73	int ret;
	74	long val;
	75
	76	ret = strict_strtol(buf, 10, &val);
	77	if (ret)
	78	goto error_ret;
	79
	80	if (val > RES_MASK(st->chip_info->bits)) {
	81	ret = -EINVAL;
	82	goto error_ret;
	83	}
	84
638e59fc	85	mutex_lock(&indio_dev->mlock);
bbed4dc7	86	st->cached_val = val;
d846263d	87	st->chip_info->store_sample(st, val);
b5a49481	88	ret = spi_sync(st->spi, &st->msg);
638e59fc	89	mutex_unlock(&indio_dev->mlock);
b5a49481 MH	90
	91	error_ret:
	92	return ret ? ret : len;
	93	}
	94
	95	static IIO_DEV_ATTR_OUT_RAW(0, ad5446_write, 0);
	96
	97	static ssize_t ad5446_show_scale(struct device *dev,
	98	struct device_attribute *attr,
	99	char *buf)
	100	{
638e59fc JC	101	struct iio_dev *indio_dev = dev_get_drvdata(dev);
638e59fc JC	102	struct ad5446_state *st = iio_priv(indio_dev);
b5a49481 MH	103	/* Corresponds to Vref / 2^(bits) */
	104	unsigned int scale_uv = (st->vref_mv * 1000) >> st->chip_info->bits;
	105
41135b1c	106	return sprintf(buf, "%d.%03d\n", scale_uv / 1000, scale_uv % 1000);
b5a49481	107	}
322c9563	108	static IIO_DEVICE_ATTR(out_voltage_scale, S_IRUGO, ad5446_show_scale, NULL, 0);
b5a49481	109
bbed4dc7 MH	110	static ssize_t ad5446_write_powerdown_mode(struct device *dev,
	111	struct device_attribute *attr,
	112	const char *buf, size_t len)
	113	{
638e59fc JC	114	struct iio_dev *indio_dev = dev_get_drvdata(dev);
638e59fc JC	115	struct ad5446_state *st = iio_priv(indio_dev);
bbed4dc7 MH	116
	117	if (sysfs_streq(buf, "1kohm_to_gnd"))
	118	st->pwr_down_mode = MODE_PWRDWN_1k;
	119	else if (sysfs_streq(buf, "100kohm_to_gnd"))
	120	st->pwr_down_mode = MODE_PWRDWN_100k;
	121	else if (sysfs_streq(buf, "three_state"))
	122	st->pwr_down_mode = MODE_PWRDWN_TRISTATE;
	123	else
	124	return -EINVAL;
	125
	126	return len;
	127	}
	128
	129	static ssize_t ad5446_read_powerdown_mode(struct device *dev,
	130	struct device_attribute attr, char buf)
	131	{
638e59fc JC	132	struct iio_dev *indio_dev = dev_get_drvdata(dev);
638e59fc JC	133	struct ad5446_state *st = iio_priv(indio_dev);
bbed4dc7 MH	134
	135	char mode[][15] = {"", "1kohm_to_gnd", "100kohm_to_gnd", "three_state"};
	136
	137	return sprintf(buf, "%s\n", mode[st->pwr_down_mode]);
	138	}
	139
	140	static ssize_t ad5446_read_dac_powerdown(struct device *dev,
	141	struct device_attribute *attr,
	142	char *buf)
	143	{
638e59fc JC	144	struct iio_dev *indio_dev = dev_get_drvdata(dev);
638e59fc JC	145	struct ad5446_state *st = iio_priv(indio_dev);
bbed4dc7 MH	146
	147	return sprintf(buf, "%d\n", st->pwr_down);
	148	}
	149
	150	static ssize_t ad5446_write_dac_powerdown(struct device *dev,
	151	struct device_attribute *attr,
	152	const char *buf, size_t len)
	153	{
638e59fc JC	154	struct iio_dev *indio_dev = dev_get_drvdata(dev);
638e59fc JC	155	struct ad5446_state *st = iio_priv(indio_dev);
bbed4dc7 MH	156	unsigned long readin;
	157	int ret;
	158
	159	ret = strict_strtol(buf, 10, &readin);
	160	if (ret)
	161	return ret;
	162
	163	if (readin > 1)
	164	ret = -EINVAL;
	165
638e59fc	166	mutex_lock(&indio_dev->mlock);
bbed4dc7 MH	167	st->pwr_down = readin;
	168
	169	if (st->pwr_down)
	170	st->chip_info->store_pwr_down(st, st->pwr_down_mode);
	171	else
	172	st->chip_info->store_sample(st, st->cached_val);
	173
	174	ret = spi_sync(st->spi, &st->msg);
638e59fc	175	mutex_unlock(&indio_dev->mlock);
bbed4dc7 MH	176
	177	return ret ? ret : len;
	178	}
	179
322c9563	180	static IIO_DEVICE_ATTR(out_voltage_powerdown_mode, S_IRUGO \| S_IWUSR,
bbed4dc7 MH	181	ad5446_read_powerdown_mode,
	182	ad5446_write_powerdown_mode, 0);
	183
322c9563	184	static IIO_CONST_ATTR(out_voltage_powerdown_mode_available,
bbed4dc7 MH	185	"1kohm_to_gnd 100kohm_to_gnd three_state");
bbed4dc7 MH	186
322c9563	187	static IIO_DEVICE_ATTR(out_voltage0_powerdown, S_IRUGO \| S_IWUSR,
bbed4dc7 MH	188	ad5446_read_dac_powerdown,
	189	ad5446_write_dac_powerdown, 0);
	190
b5a49481	191	static struct attribute *ad5446_attributes[] = {
322c9563 JC	192	&iio_dev_attr_out_voltage0_raw.dev_attr.attr,
	193	&iio_dev_attr_out_voltage_scale.dev_attr.attr,
	194	&iio_dev_attr_out_voltage0_powerdown.dev_attr.attr,
	195	&iio_dev_attr_out_voltage_powerdown_mode.dev_attr.attr,
	196	&iio_const_attr_out_voltage_powerdown_mode_available.dev_attr.attr,
b5a49481 MH	197	NULL,
	198	};
	199
bbed4dc7 MH	200	static mode_t ad5446_attr_is_visible(struct kobject *kobj,
	201	struct attribute *attr, int n)
	202	{
	203	struct device *dev = container_of(kobj, struct device, kobj);
638e59fc JC	204	struct iio_dev *indio_dev = dev_get_drvdata(dev);
638e59fc JC	205	struct ad5446_state *st = iio_priv(indio_dev);
bbed4dc7 MH	206
	207	mode_t mode = attr->mode;
	208
	209	if (!st->chip_info->store_pwr_down &&
322c9563 JC	210	(attr == &iio_dev_attr_out_voltage0_powerdown.dev_attr.attr \|\|
	211	attr == &iio_dev_attr_out_voltage_powerdown_mode.
	212	dev_attr.attr \|\|
bbed4dc7	213	attr ==
322c9563 JC	214	&iio_const_attr_out_voltage_powerdown_mode_available.
322c9563 JC	215	dev_attr.attr))
bbed4dc7 MH	216	mode = 0;
	217
	218	return mode;
	219	}
	220
b5a49481 MH	221	static const struct attribute_group ad5446_attribute_group = {
b5a49481 MH	222	.attrs = ad5446_attributes,
bbed4dc7	223	.is_visible = ad5446_attr_is_visible,
b5a49481 MH	224	};
	225
	226	static const struct ad5446_chip_info ad5446_chip_info_tbl[] = {
	227	[ID_AD5444] = {
	228	.bits = 12,
	229	.storagebits = 16,
	230	.left_shift = 2,
d846263d	231	.store_sample = ad5446_store_sample,
b5a49481 MH	232	},
	233	[ID_AD5446] = {
	234	.bits = 14,
	235	.storagebits = 16,
	236	.left_shift = 0,
d846263d	237	.store_sample = ad5446_store_sample,
b5a49481	238	},
67d1c1f4 MH	239	[ID_AD5541A] = {
	240	.bits = 16,
	241	.storagebits = 16,
	242	.left_shift = 0,
	243	.store_sample = ad5542_store_sample,
	244	},
b5a49481 MH	245	[ID_AD5542A] = {
	246	.bits = 16,
	247	.storagebits = 16,
	248	.left_shift = 0,
d846263d	249	.store_sample = ad5542_store_sample,
b5a49481	250	},
0772268a MH	251	[ID_AD5543] = {
	252	.bits = 16,
	253	.storagebits = 16,
	254	.left_shift = 0,
	255	.store_sample = ad5542_store_sample,
	256	},
b5a49481 MH	257	[ID_AD5512A] = {
	258	.bits = 12,
	259	.storagebits = 16,
	260	.left_shift = 4,
d846263d MH	261	.store_sample = ad5542_store_sample,
d846263d MH	262	},
0772268a MH	263	[ID_AD5553] = {
	264	.bits = 14,
	265	.storagebits = 16,
	266	.left_shift = 0,
	267	.store_sample = ad5542_store_sample,
	268	},
2b61535a MH	269	[ID_AD5601] = {
	270	.bits = 8,
	271	.storagebits = 16,
	272	.left_shift = 6,
	273	.store_sample = ad5542_store_sample,
	274	.store_pwr_down = ad5620_store_pwr_down,
	275	},
	276	[ID_AD5611] = {
	277	.bits = 10,
	278	.storagebits = 16,
	279	.left_shift = 4,
	280	.store_sample = ad5542_store_sample,
	281	.store_pwr_down = ad5620_store_pwr_down,
	282	},
	283	[ID_AD5621] = {
	284	.bits = 12,
	285	.storagebits = 16,
	286	.left_shift = 2,
	287	.store_sample = ad5542_store_sample,
	288	.store_pwr_down = ad5620_store_pwr_down,
	289	},
d846263d MH	290	[ID_AD5620_2500] = {
	291	.bits = 12,
	292	.storagebits = 16,
	293	.left_shift = 2,
d846263d MH	294	.int_vref_mv = 2500,
d846263d MH	295	.store_sample = ad5620_store_sample,
bbed4dc7	296	.store_pwr_down = ad5620_store_pwr_down,
d846263d MH	297	},
	298	[ID_AD5620_1250] = {
	299	.bits = 12,
	300	.storagebits = 16,
	301	.left_shift = 2,
d846263d MH	302	.int_vref_mv = 1250,
d846263d MH	303	.store_sample = ad5620_store_sample,
bbed4dc7	304	.store_pwr_down = ad5620_store_pwr_down,
d846263d MH	305	},
	306	[ID_AD5640_2500] = {
	307	.bits = 14,
	308	.storagebits = 16,
	309	.left_shift = 0,
d846263d MH	310	.int_vref_mv = 2500,
d846263d MH	311	.store_sample = ad5620_store_sample,
bbed4dc7	312	.store_pwr_down = ad5620_store_pwr_down,
d846263d MH	313	},
	314	[ID_AD5640_1250] = {
	315	.bits = 14,
	316	.storagebits = 16,
	317	.left_shift = 0,
d846263d MH	318	.int_vref_mv = 1250,
d846263d MH	319	.store_sample = ad5620_store_sample,
bbed4dc7	320	.store_pwr_down = ad5620_store_pwr_down,
d846263d MH	321	},
	322	[ID_AD5660_2500] = {
	323	.bits = 16,
	324	.storagebits = 24,
	325	.left_shift = 0,
d846263d MH	326	.int_vref_mv = 2500,
d846263d MH	327	.store_sample = ad5660_store_sample,
bbed4dc7	328	.store_pwr_down = ad5660_store_pwr_down,
d846263d MH	329	},
	330	[ID_AD5660_1250] = {
	331	.bits = 16,
	332	.storagebits = 24,
	333	.left_shift = 0,
d846263d MH	334	.int_vref_mv = 1250,
d846263d MH	335	.store_sample = ad5660_store_sample,
bbed4dc7	336	.store_pwr_down = ad5660_store_pwr_down,
b5a49481 MH	337	},
	338	};
	339
6fe8135f JC	340	static const struct iio_info ad5446_info = {
	341	.attrs = &ad5446_attribute_group,
	342	.driver_module = THIS_MODULE,
	343	};
	344
b5a49481 MH	345	static int __devinit ad5446_probe(struct spi_device *spi)
	346	{
	347	struct ad5446_state *st;
86729fc4 JC	348	struct iio_dev *indio_dev;
86729fc4 JC	349	struct regulator *reg;
b5a49481 MH	350	int ret, voltage_uv = 0;
b5a49481 MH	351
86729fc4 JC	352	reg = regulator_get(&spi->dev, "vcc");
	353	if (!IS_ERR(reg)) {
	354	ret = regulator_enable(reg);
b5a49481 MH	355	if (ret)
	356	goto error_put_reg;
	357
86729fc4	358	voltage_uv = regulator_get_voltage(reg);
b5a49481 MH	359	}
b5a49481 MH	360
86729fc4 JC	361	indio_dev = iio_allocate_device(sizeof(*st));
	362	if (indio_dev == NULL) {
	363	ret = -ENOMEM;
	364	goto error_disable_reg;
	365	}
	366	st = iio_priv(indio_dev);
b5a49481 MH	367	st->chip_info =
	368	&ad5446_chip_info_tbl[spi_get_device_id(spi)->driver_data];
	369
86729fc4 JC	370	spi_set_drvdata(spi, indio_dev);
86729fc4 JC	371	st->reg = reg;
b5a49481 MH	372	st->spi = spi;
b5a49481 MH	373
b5a49481	374	/* Estabilish that the iio_dev is a child of the spi device */
86729fc4 JC	375	indio_dev->dev.parent = &spi->dev;
	376	indio_dev->name = spi_get_device_id(spi)->name;
	377	indio_dev->info = &ad5446_info;
	378	indio_dev->modes = INDIO_DIRECT_MODE;
b5a49481 MH	379
	380	/* Setup default message */
	381
d846263d MH	382	st->xfer.tx_buf = &st->data;
d846263d MH	383	st->xfer.len = st->chip_info->storagebits / 8;
b5a49481 MH	384
	385	spi_message_init(&st->msg);
	386	spi_message_add_tail(&st->xfer, &st->msg);
	387
d846263d	388	switch (spi_get_device_id(spi)->driver_data) {
bbed4dc7 MH	389	case ID_AD5620_2500:
	390	case ID_AD5620_1250:
	391	case ID_AD5640_2500:
	392	case ID_AD5640_1250:
	393	case ID_AD5660_2500:
	394	case ID_AD5660_1250:
	395	st->vref_mv = st->chip_info->int_vref_mv;
	396	break;
	397	default:
	398	if (voltage_uv)
	399	st->vref_mv = voltage_uv / 1000;
	400	else
	401	dev_warn(&spi->dev,
	402	"reference voltage unspecified\n");
d846263d	403	}
b5a49481	404
86729fc4	405	ret = iio_device_register(indio_dev);
b5a49481 MH	406	if (ret)
	407	goto error_free_device;
	408
	409	return 0;
	410
	411	error_free_device:
86729fc4	412	iio_free_device(indio_dev);
b5a49481	413	error_disable_reg:
86729fc4 JC	414	if (!IS_ERR(reg))
86729fc4 JC	415	regulator_disable(reg);
b5a49481	416	error_put_reg:
86729fc4 JC	417	if (!IS_ERR(reg))
	418	regulator_put(reg);
	419
b5a49481 MH	420	return ret;
	421	}
	422
	423	static int ad5446_remove(struct spi_device *spi)
	424	{
86729fc4 JC	425	struct iio_dev *indio_dev = spi_get_drvdata(spi);
86729fc4 JC	426	struct ad5446_state *st = iio_priv(indio_dev);
b5a49481 MH	427
b5a49481 MH	428	iio_device_unregister(indio_dev);
d2fffd6c JC	429	if (!IS_ERR(st->reg)) {
	430	regulator_disable(st->reg);
	431	regulator_put(st->reg);
b5a49481	432	}
d2fffd6c JC	433	iio_free_device(indio_dev);
d2fffd6c JC	434
b5a49481 MH	435	return 0;
	436	}
	437
	438	static const struct spi_device_id ad5446_id[] = {
	439	{"ad5444", ID_AD5444},
	440	{"ad5446", ID_AD5446},
b5a49481	441	{"ad5512a", ID_AD5512A},
67d1c1f4	442	{"ad5541a", ID_AD5541A},
bd51c0b0 MH	443	{"ad5542a", ID_AD5542A},
	444	{"ad5543", ID_AD5543},
	445	{"ad5553", ID_AD5553},
2b61535a MH	446	{"ad5601", ID_AD5601},
	447	{"ad5611", ID_AD5611},
	448	{"ad5621", ID_AD5621},
d846263d MH	449	{"ad5620-2500", ID_AD5620_2500}, /* AD5620/40/60: */
	450	{"ad5620-1250", ID_AD5620_1250}, /* part numbers may look differently */
	451	{"ad5640-2500", ID_AD5640_2500},
	452	{"ad5640-1250", ID_AD5640_1250},
	453	{"ad5660-2500", ID_AD5660_2500},
	454	{"ad5660-1250", ID_AD5660_1250},
b5a49481 MH	455	{}
	456	};
	457
	458	static struct spi_driver ad5446_driver = {
	459	.driver = {
	460	.name = "ad5446",
	461	.bus = &spi_bus_type,
	462	.owner = THIS_MODULE,
	463	},
	464	.probe = ad5446_probe,
	465	.remove = __devexit_p(ad5446_remove),
	466	.id_table = ad5446_id,
	467	};
	468
	469	static int __init ad5446_init(void)
	470	{
	471	return spi_register_driver(&ad5446_driver);
	472	}
	473	module_init(ad5446_init);
	474
	475	static void __exit ad5446_exit(void)
	476	{
	477	spi_unregister_driver(&ad5446_driver);
	478	}
	479	module_exit(ad5446_exit);
	480
	481	MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
	482	MODULE_DESCRIPTION("Analog Devices AD5444/AD5446 DAC");
	483	MODULE_LICENSE("GPL v2");
	484	MODULE_ALIAS("spi:ad5446");