652 lines
14 KiB
C
652 lines
14 KiB
C
/*
|
|
* Analog devices AD5380, AD5381, AD5382, AD5383, AD5390, AD5391, AD5392
|
|
* 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/i2c.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/spi/spi.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/sysfs.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/regulator/consumer.h>
|
|
|
|
#include <linux/iio/iio.h>
|
|
#include <linux/iio/sysfs.h>
|
|
|
|
#define AD5380_REG_DATA(x) (((x) << 2) | 3)
|
|
#define AD5380_REG_OFFSET(x) (((x) << 2) | 2)
|
|
#define AD5380_REG_GAIN(x) (((x) << 2) | 1)
|
|
#define AD5380_REG_SF_PWR_DOWN (8 << 2)
|
|
#define AD5380_REG_SF_PWR_UP (9 << 2)
|
|
#define AD5380_REG_SF_CTRL (12 << 2)
|
|
|
|
#define AD5380_CTRL_PWR_DOWN_MODE_OFFSET 13
|
|
#define AD5380_CTRL_INT_VREF_2V5 BIT(12)
|
|
#define AD5380_CTRL_INT_VREF_EN BIT(10)
|
|
|
|
/**
|
|
* struct ad5380_chip_info - chip specific information
|
|
* @channel_template: channel specification template
|
|
* @num_channels: number of channels
|
|
* @int_vref: internal vref in uV
|
|
*/
|
|
|
|
struct ad5380_chip_info {
|
|
struct iio_chan_spec channel_template;
|
|
unsigned int num_channels;
|
|
unsigned int int_vref;
|
|
};
|
|
|
|
/**
|
|
* struct ad5380_state - driver instance specific data
|
|
* @regmap: regmap instance used by the device
|
|
* @chip_info: chip model specific constants, available modes etc
|
|
* @vref_reg: vref supply regulator
|
|
* @vref: actual reference voltage used in uA
|
|
* @pwr_down: whether the chip is currently in power down mode
|
|
*/
|
|
|
|
struct ad5380_state {
|
|
struct regmap *regmap;
|
|
const struct ad5380_chip_info *chip_info;
|
|
struct regulator *vref_reg;
|
|
int vref;
|
|
bool pwr_down;
|
|
};
|
|
|
|
enum ad5380_type {
|
|
ID_AD5380_3,
|
|
ID_AD5380_5,
|
|
ID_AD5381_3,
|
|
ID_AD5381_5,
|
|
ID_AD5382_3,
|
|
ID_AD5382_5,
|
|
ID_AD5383_3,
|
|
ID_AD5383_5,
|
|
ID_AD5390_3,
|
|
ID_AD5390_5,
|
|
ID_AD5391_3,
|
|
ID_AD5391_5,
|
|
ID_AD5392_3,
|
|
ID_AD5392_5,
|
|
};
|
|
|
|
static ssize_t ad5380_read_dac_powerdown(struct iio_dev *indio_dev,
|
|
uintptr_t private, const struct iio_chan_spec *chan, char *buf)
|
|
{
|
|
struct ad5380_state *st = iio_priv(indio_dev);
|
|
|
|
return sprintf(buf, "%d\n", st->pwr_down);
|
|
}
|
|
|
|
static ssize_t ad5380_write_dac_powerdown(struct iio_dev *indio_dev,
|
|
uintptr_t private, const struct iio_chan_spec *chan, const char *buf,
|
|
size_t len)
|
|
{
|
|
struct ad5380_state *st = iio_priv(indio_dev);
|
|
bool pwr_down;
|
|
int ret;
|
|
|
|
ret = strtobool(buf, &pwr_down);
|
|
if (ret)
|
|
return ret;
|
|
|
|
mutex_lock(&indio_dev->mlock);
|
|
|
|
if (pwr_down)
|
|
ret = regmap_write(st->regmap, AD5380_REG_SF_PWR_DOWN, 0);
|
|
else
|
|
ret = regmap_write(st->regmap, AD5380_REG_SF_PWR_UP, 0);
|
|
|
|
st->pwr_down = pwr_down;
|
|
|
|
mutex_unlock(&indio_dev->mlock);
|
|
|
|
return ret ? ret : len;
|
|
}
|
|
|
|
static const char * const ad5380_powerdown_modes[] = {
|
|
"100kohm_to_gnd",
|
|
"three_state",
|
|
};
|
|
|
|
static int ad5380_get_powerdown_mode(struct iio_dev *indio_dev,
|
|
const struct iio_chan_spec *chan)
|
|
{
|
|
struct ad5380_state *st = iio_priv(indio_dev);
|
|
unsigned int mode;
|
|
int ret;
|
|
|
|
ret = regmap_read(st->regmap, AD5380_REG_SF_CTRL, &mode);
|
|
if (ret)
|
|
return ret;
|
|
|
|
mode = (mode >> AD5380_CTRL_PWR_DOWN_MODE_OFFSET) & 1;
|
|
|
|
return mode;
|
|
}
|
|
|
|
static int ad5380_set_powerdown_mode(struct iio_dev *indio_dev,
|
|
const struct iio_chan_spec *chan, unsigned int mode)
|
|
{
|
|
struct ad5380_state *st = iio_priv(indio_dev);
|
|
int ret;
|
|
|
|
ret = regmap_update_bits(st->regmap, AD5380_REG_SF_CTRL,
|
|
1 << AD5380_CTRL_PWR_DOWN_MODE_OFFSET,
|
|
mode << AD5380_CTRL_PWR_DOWN_MODE_OFFSET);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct iio_enum ad5380_powerdown_mode_enum = {
|
|
.items = ad5380_powerdown_modes,
|
|
.num_items = ARRAY_SIZE(ad5380_powerdown_modes),
|
|
.get = ad5380_get_powerdown_mode,
|
|
.set = ad5380_set_powerdown_mode,
|
|
};
|
|
|
|
static unsigned int ad5380_info_to_reg(struct iio_chan_spec const *chan,
|
|
long info)
|
|
{
|
|
switch (info) {
|
|
case IIO_CHAN_INFO_RAW:
|
|
return AD5380_REG_DATA(chan->address);
|
|
case IIO_CHAN_INFO_CALIBBIAS:
|
|
return AD5380_REG_OFFSET(chan->address);
|
|
case IIO_CHAN_INFO_CALIBSCALE:
|
|
return AD5380_REG_GAIN(chan->address);
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ad5380_write_raw(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan, int val, int val2, long info)
|
|
{
|
|
const unsigned int max_val = (1 << chan->scan_type.realbits);
|
|
struct ad5380_state *st = iio_priv(indio_dev);
|
|
|
|
switch (info) {
|
|
case IIO_CHAN_INFO_RAW:
|
|
case IIO_CHAN_INFO_CALIBSCALE:
|
|
if (val >= max_val || val < 0)
|
|
return -EINVAL;
|
|
|
|
return regmap_write(st->regmap,
|
|
ad5380_info_to_reg(chan, info),
|
|
val << chan->scan_type.shift);
|
|
case IIO_CHAN_INFO_CALIBBIAS:
|
|
val += (1 << chan->scan_type.realbits) / 2;
|
|
if (val >= max_val || val < 0)
|
|
return -EINVAL;
|
|
|
|
return regmap_write(st->regmap,
|
|
AD5380_REG_OFFSET(chan->address),
|
|
val << chan->scan_type.shift);
|
|
default:
|
|
break;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int ad5380_read_raw(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan, int *val, int *val2, long info)
|
|
{
|
|
struct ad5380_state *st = iio_priv(indio_dev);
|
|
int ret;
|
|
|
|
switch (info) {
|
|
case IIO_CHAN_INFO_RAW:
|
|
case IIO_CHAN_INFO_CALIBSCALE:
|
|
ret = regmap_read(st->regmap, ad5380_info_to_reg(chan, info),
|
|
val);
|
|
if (ret)
|
|
return ret;
|
|
*val >>= chan->scan_type.shift;
|
|
return IIO_VAL_INT;
|
|
case IIO_CHAN_INFO_CALIBBIAS:
|
|
ret = regmap_read(st->regmap, AD5380_REG_OFFSET(chan->address),
|
|
val);
|
|
if (ret)
|
|
return ret;
|
|
*val >>= chan->scan_type.shift;
|
|
val -= (1 << chan->scan_type.realbits) / 2;
|
|
return IIO_VAL_INT;
|
|
case IIO_CHAN_INFO_SCALE:
|
|
*val = 2 * st->vref;
|
|
*val2 = chan->scan_type.realbits;
|
|
return IIO_VAL_FRACTIONAL_LOG2;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static const struct iio_info ad5380_info = {
|
|
.read_raw = ad5380_read_raw,
|
|
.write_raw = ad5380_write_raw,
|
|
};
|
|
|
|
static struct iio_chan_spec_ext_info ad5380_ext_info[] = {
|
|
{
|
|
.name = "powerdown",
|
|
.read = ad5380_read_dac_powerdown,
|
|
.write = ad5380_write_dac_powerdown,
|
|
.shared = IIO_SEPARATE,
|
|
},
|
|
IIO_ENUM("powerdown_mode", IIO_SHARED_BY_TYPE,
|
|
&ad5380_powerdown_mode_enum),
|
|
IIO_ENUM_AVAILABLE("powerdown_mode", &ad5380_powerdown_mode_enum),
|
|
{ },
|
|
};
|
|
|
|
#define AD5380_CHANNEL(_bits) { \
|
|
.type = IIO_VOLTAGE, \
|
|
.indexed = 1, \
|
|
.output = 1, \
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
|
|
BIT(IIO_CHAN_INFO_CALIBSCALE) | \
|
|
BIT(IIO_CHAN_INFO_CALIBBIAS), \
|
|
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
|
|
.scan_type = { \
|
|
.sign = 'u', \
|
|
.realbits = (_bits), \
|
|
.storagebits = 16, \
|
|
.shift = 14 - (_bits), \
|
|
}, \
|
|
.ext_info = ad5380_ext_info, \
|
|
}
|
|
|
|
static const struct ad5380_chip_info ad5380_chip_info_tbl[] = {
|
|
[ID_AD5380_3] = {
|
|
.channel_template = AD5380_CHANNEL(14),
|
|
.num_channels = 40,
|
|
.int_vref = 1250,
|
|
},
|
|
[ID_AD5380_5] = {
|
|
.channel_template = AD5380_CHANNEL(14),
|
|
.num_channels = 40,
|
|
.int_vref = 2500,
|
|
},
|
|
[ID_AD5381_3] = {
|
|
.channel_template = AD5380_CHANNEL(12),
|
|
.num_channels = 16,
|
|
.int_vref = 1250,
|
|
},
|
|
[ID_AD5381_5] = {
|
|
.channel_template = AD5380_CHANNEL(12),
|
|
.num_channels = 16,
|
|
.int_vref = 2500,
|
|
},
|
|
[ID_AD5382_3] = {
|
|
.channel_template = AD5380_CHANNEL(14),
|
|
.num_channels = 32,
|
|
.int_vref = 1250,
|
|
},
|
|
[ID_AD5382_5] = {
|
|
.channel_template = AD5380_CHANNEL(14),
|
|
.num_channels = 32,
|
|
.int_vref = 2500,
|
|
},
|
|
[ID_AD5383_3] = {
|
|
.channel_template = AD5380_CHANNEL(12),
|
|
.num_channels = 32,
|
|
.int_vref = 1250,
|
|
},
|
|
[ID_AD5383_5] = {
|
|
.channel_template = AD5380_CHANNEL(12),
|
|
.num_channels = 32,
|
|
.int_vref = 2500,
|
|
},
|
|
[ID_AD5390_3] = {
|
|
.channel_template = AD5380_CHANNEL(14),
|
|
.num_channels = 16,
|
|
.int_vref = 1250,
|
|
},
|
|
[ID_AD5390_5] = {
|
|
.channel_template = AD5380_CHANNEL(14),
|
|
.num_channels = 16,
|
|
.int_vref = 2500,
|
|
},
|
|
[ID_AD5391_3] = {
|
|
.channel_template = AD5380_CHANNEL(12),
|
|
.num_channels = 16,
|
|
.int_vref = 1250,
|
|
},
|
|
[ID_AD5391_5] = {
|
|
.channel_template = AD5380_CHANNEL(12),
|
|
.num_channels = 16,
|
|
.int_vref = 2500,
|
|
},
|
|
[ID_AD5392_3] = {
|
|
.channel_template = AD5380_CHANNEL(14),
|
|
.num_channels = 8,
|
|
.int_vref = 1250,
|
|
},
|
|
[ID_AD5392_5] = {
|
|
.channel_template = AD5380_CHANNEL(14),
|
|
.num_channels = 8,
|
|
.int_vref = 2500,
|
|
},
|
|
};
|
|
|
|
static int ad5380_alloc_channels(struct iio_dev *indio_dev)
|
|
{
|
|
struct ad5380_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 = i;
|
|
}
|
|
|
|
indio_dev->channels = channels;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ad5380_probe(struct device *dev, struct regmap *regmap,
|
|
enum ad5380_type type, const char *name)
|
|
{
|
|
struct iio_dev *indio_dev;
|
|
struct ad5380_state *st;
|
|
unsigned int ctrl = 0;
|
|
int ret;
|
|
|
|
indio_dev = devm_iio_device_alloc(dev, sizeof(*st));
|
|
if (indio_dev == NULL) {
|
|
dev_err(dev, "Failed to allocate iio device\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
st = iio_priv(indio_dev);
|
|
dev_set_drvdata(dev, indio_dev);
|
|
|
|
st->chip_info = &ad5380_chip_info_tbl[type];
|
|
st->regmap = regmap;
|
|
|
|
indio_dev->dev.parent = dev;
|
|
indio_dev->name = name;
|
|
indio_dev->info = &ad5380_info;
|
|
indio_dev->modes = INDIO_DIRECT_MODE;
|
|
indio_dev->num_channels = st->chip_info->num_channels;
|
|
|
|
ret = ad5380_alloc_channels(indio_dev);
|
|
if (ret) {
|
|
dev_err(dev, "Failed to allocate channel spec: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
if (st->chip_info->int_vref == 2500)
|
|
ctrl |= AD5380_CTRL_INT_VREF_2V5;
|
|
|
|
st->vref_reg = devm_regulator_get(dev, "vref");
|
|
if (!IS_ERR(st->vref_reg)) {
|
|
ret = regulator_enable(st->vref_reg);
|
|
if (ret) {
|
|
dev_err(dev, "Failed to enable vref regulators: %d\n",
|
|
ret);
|
|
goto error_free_reg;
|
|
}
|
|
|
|
ret = regulator_get_voltage(st->vref_reg);
|
|
if (ret < 0)
|
|
goto error_disable_reg;
|
|
|
|
st->vref = ret / 1000;
|
|
} else {
|
|
st->vref = st->chip_info->int_vref;
|
|
ctrl |= AD5380_CTRL_INT_VREF_EN;
|
|
}
|
|
|
|
ret = regmap_write(st->regmap, AD5380_REG_SF_CTRL, ctrl);
|
|
if (ret) {
|
|
dev_err(dev, "Failed to write to device: %d\n", ret);
|
|
goto error_disable_reg;
|
|
}
|
|
|
|
ret = iio_device_register(indio_dev);
|
|
if (ret) {
|
|
dev_err(dev, "Failed to register iio device: %d\n", ret);
|
|
goto error_disable_reg;
|
|
}
|
|
|
|
return 0;
|
|
|
|
error_disable_reg:
|
|
if (!IS_ERR(st->vref_reg))
|
|
regulator_disable(st->vref_reg);
|
|
error_free_reg:
|
|
kfree(indio_dev->channels);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ad5380_remove(struct device *dev)
|
|
{
|
|
struct iio_dev *indio_dev = dev_get_drvdata(dev);
|
|
struct ad5380_state *st = iio_priv(indio_dev);
|
|
|
|
iio_device_unregister(indio_dev);
|
|
|
|
kfree(indio_dev->channels);
|
|
|
|
if (!IS_ERR(st->vref_reg)) {
|
|
regulator_disable(st->vref_reg);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool ad5380_reg_false(struct device *dev, unsigned int reg)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static const struct regmap_config ad5380_regmap_config = {
|
|
.reg_bits = 10,
|
|
.val_bits = 14,
|
|
|
|
.max_register = AD5380_REG_DATA(40),
|
|
.cache_type = REGCACHE_RBTREE,
|
|
|
|
.volatile_reg = ad5380_reg_false,
|
|
.readable_reg = ad5380_reg_false,
|
|
};
|
|
|
|
#if IS_ENABLED(CONFIG_SPI_MASTER)
|
|
|
|
static int ad5380_spi_probe(struct spi_device *spi)
|
|
{
|
|
const struct spi_device_id *id = spi_get_device_id(spi);
|
|
struct regmap *regmap;
|
|
|
|
regmap = devm_regmap_init_spi(spi, &ad5380_regmap_config);
|
|
|
|
if (IS_ERR(regmap))
|
|
return PTR_ERR(regmap);
|
|
|
|
return ad5380_probe(&spi->dev, regmap, id->driver_data, id->name);
|
|
}
|
|
|
|
static int ad5380_spi_remove(struct spi_device *spi)
|
|
{
|
|
return ad5380_remove(&spi->dev);
|
|
}
|
|
|
|
static const struct spi_device_id ad5380_spi_ids[] = {
|
|
{ "ad5380-3", ID_AD5380_3 },
|
|
{ "ad5380-5", ID_AD5380_5 },
|
|
{ "ad5381-3", ID_AD5381_3 },
|
|
{ "ad5381-5", ID_AD5381_5 },
|
|
{ "ad5382-3", ID_AD5382_3 },
|
|
{ "ad5382-5", ID_AD5382_5 },
|
|
{ "ad5383-3", ID_AD5383_3 },
|
|
{ "ad5383-5", ID_AD5383_5 },
|
|
{ "ad5384-3", ID_AD5380_3 },
|
|
{ "ad5384-5", ID_AD5380_5 },
|
|
{ "ad5390-3", ID_AD5390_3 },
|
|
{ "ad5390-5", ID_AD5390_5 },
|
|
{ "ad5391-3", ID_AD5391_3 },
|
|
{ "ad5391-5", ID_AD5391_5 },
|
|
{ "ad5392-3", ID_AD5392_3 },
|
|
{ "ad5392-5", ID_AD5392_5 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(spi, ad5380_spi_ids);
|
|
|
|
static struct spi_driver ad5380_spi_driver = {
|
|
.driver = {
|
|
.name = "ad5380",
|
|
},
|
|
.probe = ad5380_spi_probe,
|
|
.remove = ad5380_spi_remove,
|
|
.id_table = ad5380_spi_ids,
|
|
};
|
|
|
|
static inline int ad5380_spi_register_driver(void)
|
|
{
|
|
return spi_register_driver(&ad5380_spi_driver);
|
|
}
|
|
|
|
static inline void ad5380_spi_unregister_driver(void)
|
|
{
|
|
spi_unregister_driver(&ad5380_spi_driver);
|
|
}
|
|
|
|
#else
|
|
|
|
static inline int ad5380_spi_register_driver(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void ad5380_spi_unregister_driver(void)
|
|
{
|
|
}
|
|
|
|
#endif
|
|
|
|
#if IS_ENABLED(CONFIG_I2C)
|
|
|
|
static int ad5380_i2c_probe(struct i2c_client *i2c,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct regmap *regmap;
|
|
|
|
regmap = devm_regmap_init_i2c(i2c, &ad5380_regmap_config);
|
|
|
|
if (IS_ERR(regmap))
|
|
return PTR_ERR(regmap);
|
|
|
|
return ad5380_probe(&i2c->dev, regmap, id->driver_data, id->name);
|
|
}
|
|
|
|
static int ad5380_i2c_remove(struct i2c_client *i2c)
|
|
{
|
|
return ad5380_remove(&i2c->dev);
|
|
}
|
|
|
|
static const struct i2c_device_id ad5380_i2c_ids[] = {
|
|
{ "ad5380-3", ID_AD5380_3 },
|
|
{ "ad5380-5", ID_AD5380_5 },
|
|
{ "ad5381-3", ID_AD5381_3 },
|
|
{ "ad5381-5", ID_AD5381_5 },
|
|
{ "ad5382-3", ID_AD5382_3 },
|
|
{ "ad5382-5", ID_AD5382_5 },
|
|
{ "ad5383-3", ID_AD5383_3 },
|
|
{ "ad5383-5", ID_AD5383_5 },
|
|
{ "ad5384-3", ID_AD5380_3 },
|
|
{ "ad5384-5", ID_AD5380_5 },
|
|
{ "ad5390-3", ID_AD5390_3 },
|
|
{ "ad5390-5", ID_AD5390_5 },
|
|
{ "ad5391-3", ID_AD5391_3 },
|
|
{ "ad5391-5", ID_AD5391_5 },
|
|
{ "ad5392-3", ID_AD5392_3 },
|
|
{ "ad5392-5", ID_AD5392_5 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, ad5380_i2c_ids);
|
|
|
|
static struct i2c_driver ad5380_i2c_driver = {
|
|
.driver = {
|
|
.name = "ad5380",
|
|
},
|
|
.probe = ad5380_i2c_probe,
|
|
.remove = ad5380_i2c_remove,
|
|
.id_table = ad5380_i2c_ids,
|
|
};
|
|
|
|
static inline int ad5380_i2c_register_driver(void)
|
|
{
|
|
return i2c_add_driver(&ad5380_i2c_driver);
|
|
}
|
|
|
|
static inline void ad5380_i2c_unregister_driver(void)
|
|
{
|
|
i2c_del_driver(&ad5380_i2c_driver);
|
|
}
|
|
|
|
#else
|
|
|
|
static inline int ad5380_i2c_register_driver(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void ad5380_i2c_unregister_driver(void)
|
|
{
|
|
}
|
|
|
|
#endif
|
|
|
|
static int __init ad5380_spi_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = ad5380_spi_register_driver();
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = ad5380_i2c_register_driver();
|
|
if (ret) {
|
|
ad5380_spi_unregister_driver();
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
module_init(ad5380_spi_init);
|
|
|
|
static void __exit ad5380_spi_exit(void)
|
|
{
|
|
ad5380_i2c_unregister_driver();
|
|
ad5380_spi_unregister_driver();
|
|
|
|
}
|
|
module_exit(ad5380_spi_exit);
|
|
|
|
MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
|
|
MODULE_DESCRIPTION("Analog Devices AD5380/81/82/83/84/90/91/92 DAC");
|
|
MODULE_LICENSE("GPL v2");
|