On 12/05/2011 04:08 PM, Lars-Peter Clausen wrote:
> This patch adds support for the Analog Devices D5380, AD5381,
> AD5382, AD5383, AD5384, AD5390, AD5391, AD5392 multi-channel
> Digital to Analog Converters.
>
Lars-Peter
Just got a build warning on this you probably want to check out...
drivers/staging/iio/dac/ad5380.c:150:10: warning: Initializer entry
defined twice
drivers/staging/iio/dac/ad5380.c:160:10: also defined here
Trivial, but good to fix!
Jonathan
> Signed-off-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
> Acked-by: Jonathan Cameron <jic23@xxxxxxxxxx>
> ---
> drivers/staging/iio/dac/Kconfig | 13 +
> drivers/staging/iio/dac/Makefile | 1 +
> drivers/staging/iio/dac/ad5380.c | 676 ++++++++++++++++++++++++++++++++++++++
> 3 files changed, 690 insertions(+), 0 deletions(-)
> create mode 100644 drivers/staging/iio/dac/ad5380.c
>
> diff --git a/drivers/staging/iio/dac/Kconfig b/drivers/staging/iio/dac/Kconfig
> index 01b1059..bbc33dd 100644
> --- a/drivers/staging/iio/dac/Kconfig
> +++ b/drivers/staging/iio/dac/Kconfig
> @@ -24,6 +24,19 @@ config AD5360
> To compile this driver as module choose M here: the module will be called
> ad5360.
>
> +config AD5380
> + tristate "Analog Devices AD5380/81/82/83/84/90/91/92 DAC driver"
> + depends on (SPI_MASTER || I2C)
> + select REGMAP_I2C if I2C
> + select REGMAP_SPI if SPI_MASTER
> + help
> + Say yes here to build support for Analog Devices AD5380, AD5381,
> + AD5382, AD5383, AD5384, AD5390, AD5391, AD5392 multi-channel
> + Digital to Analog Converters (DAC).
> +
> + To compile this driver as module choose M here: the module will be called
> + ad5380.
> +
> config AD5421
> tristate "Analog Devices AD5421 DAC driver"
> depends on SPI
> diff --git a/drivers/staging/iio/dac/Makefile b/drivers/staging/iio/dac/Makefile
> index 2bd6b55..8ab1d26 100644
> --- a/drivers/staging/iio/dac/Makefile
> +++ b/drivers/staging/iio/dac/Makefile
> @@ -3,6 +3,7 @@
> #
>
> obj-$(CONFIG_AD5360) += ad5360.o
> +obj-$(CONFIG_AD5380) += ad5380.o
> obj-$(CONFIG_AD5421) += ad5421.o
> obj-$(CONFIG_AD5624R_SPI) += ad5624r_spi.o
> obj-$(CONFIG_AD5064) += ad5064.o
> diff --git a/drivers/staging/iio/dac/ad5380.c b/drivers/staging/iio/dac/ad5380.c
> new file mode 100644
> index 0000000..9d91ccd
> --- /dev/null
> +++ b/drivers/staging/iio/dac/ad5380.c
> @@ -0,0 +1,676 @@
> +/*
> + * 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 "../iio.h"
> +#include "../sysfs.h"
> +#include "dac.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,
> +};
> +
> +#define AD5380_CHANNEL(_bits) { \
> + .type = IIO_VOLTAGE, \
> + .indexed = 1, \
> + .output = 1, \
> + .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT | \
> + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | \
> + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, \
> + .scan_type = IIO_ST('u', (_bits), 16, 14 - (_bits)) \
> +}
> +
> +static const struct ad5380_chip_info ad5380_chip_info_tbl[] = {
> + [ID_AD5380_3] = {
> + .channel_template = AD5380_CHANNEL(14),
> + .num_channels = 40,
> + .int_vref = 1250000,
> + },
> + [ID_AD5380_5] = {
> + .channel_template = AD5380_CHANNEL(14),
> + .num_channels = 40,
> + .int_vref = 2500000,
> + },
> + [ID_AD5381_3] = {
> + .channel_template = AD5380_CHANNEL(12),
> + .num_channels = 16,
> + .int_vref = 1250000,
> + },
> + [ID_AD5381_5] = {
> + .channel_template = AD5380_CHANNEL(12),
> + .num_channels = 16,
> + .int_vref = 2500000,
> + },
> + [ID_AD5382_3] = {
> + .channel_template = AD5380_CHANNEL(14),
> + .num_channels = 32,
> + .int_vref = 1250000,
> + },
> + [ID_AD5382_5] = {
> + .channel_template = AD5380_CHANNEL(14),
> + .num_channels = 32,
> + .int_vref = 2500000,
> + },
> + [ID_AD5383_3] = {
> + .channel_template = AD5380_CHANNEL(12),
> + .num_channels = 32,
> + .int_vref = 1250000,
> + },
> + [ID_AD5383_5] = {
> + .channel_template = AD5380_CHANNEL(12),
> + .num_channels = 32,
> + .int_vref = 2500000,
> + },
> + [ID_AD5390_3] = {
> + .channel_template = AD5380_CHANNEL(14),
> + .num_channels = 16,
> + .int_vref = 1250000,
> + },
> + [ID_AD5390_5] = {
> + .channel_template = AD5380_CHANNEL(14),
> + .num_channels = 16,
> + .int_vref = 2500000,
> + },
> + [ID_AD5391_3] = {
> + .channel_template = AD5380_CHANNEL(12),
> + .num_channels = 16,
> + .int_vref = 1250000,
> + },
> + [ID_AD5392_5] = {
> + .channel_template = AD5380_CHANNEL(12),
> + .num_channels = 16,
> + .int_vref = 2500000,
> + },
> + [ID_AD5392_3] = {
> + .channel_template = AD5380_CHANNEL(14),
> + .num_channels = 8,
> + .int_vref = 1250000,
> + },
> + [ID_AD5392_5] = {
> + .channel_template = AD5380_CHANNEL(14),
> + .num_channels = 8,
> + .int_vref = 2500000,
> + },
> +};
> +
> +static ssize_t ad5380_read_dac_powerdown(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
> + struct ad5380_state *st = iio_priv(indio_dev);
> +
> + return sprintf(buf, "%d\n", st->pwr_down);
> +}
> +
> +static ssize_t ad5380_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 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 IIO_DEVICE_ATTR(out_voltage_powerdown,
> + S_IRUGO | S_IWUSR,
> + ad5380_read_dac_powerdown,
> + ad5380_write_dac_powerdown, 0);
> +
> +static const char ad5380_powerdown_modes[][15] = {
> + [0] = "100kohm_to_gnd",
> + [1] = "three_state",
> +};
> +
> +static ssize_t ad5380_read_powerdown_mode(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
> + 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 sprintf(buf, "%s\n", ad5380_powerdown_modes[mode]);
> +}
> +
> +static ssize_t ad5380_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 ad5380_state *st = iio_priv(indio_dev);
> + unsigned int i;
> + int ret;
> +
> + for (i = 0; i < ARRAY_SIZE(ad5380_powerdown_modes); ++i) {
> + if (sysfs_streq(buf, ad5380_powerdown_modes[i]))
> + break;
> + }
> +
> + if (i == ARRAY_SIZE(ad5380_powerdown_modes))
> + return -EINVAL;
> +
> + ret = regmap_update_bits(st->regmap, AD5380_REG_SF_CTRL,
> + 1 << AD5380_CTRL_PWR_DOWN_MODE_OFFSET,
> + i << AD5380_CTRL_PWR_DOWN_MODE_OFFSET);
> +
> + return ret ? ret : len;
> +}
> +
> +static IIO_DEVICE_ATTR(out_voltage_powerdown_mode,
> + S_IRUGO | S_IWUSR,
> + ad5380_read_powerdown_mode,
> + ad5380_write_powerdown_mode, 0);
> +
> +static IIO_CONST_ATTR(out_voltage_powerdown_mode_available,
> + "100kohm_to_gnd three_state");
> +
> +static struct attribute *ad5380_attributes[] = {
> + &iio_dev_attr_out_voltage_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 const struct attribute_group ad5380_attribute_group = {
> + .attrs = ad5380_attributes,
> +};
> +
> +static unsigned int ad5380_info_to_reg(struct iio_chan_spec const *chan,
> + long info)
> +{
> + switch (info) {
> + case 0:
> + 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 0:
> + 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);
> + unsigned long scale_uv;
> + int ret;
> +
> + switch (info) {
> + case 0:
> + 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:
> + scale_uv = ((2 * st->vref) >> chan->scan_type.realbits) * 100;
> + *val = scale_uv / 100000;
> + *val2 = (scale_uv % 100000) * 10;
> + return IIO_VAL_INT_PLUS_MICRO;
> + default:
> + break;
> + }
> +
> + return -EINVAL;
> +}
> +
> +static const struct iio_info ad5380_info = {
> + .read_raw = ad5380_read_raw,
> + .write_raw = ad5380_write_raw,
> + .attrs = &ad5380_attribute_group,
> + .driver_module = THIS_MODULE,
> +};
> +
> +static int __devinit 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(sizeof(struct iio_chan_spec),
> + st->chip_info->num_channels, 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 __devinit 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 = iio_allocate_device(sizeof(*st));
> + if (indio_dev == NULL) {
> + dev_err(dev, "Failed to allocate iio device\n");
> + ret = -ENOMEM;
> + goto error_regmap_exit;
> + }
> +
> + 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);
> + goto error_free;
> + }
> +
> + if (st->chip_info->int_vref == 2500000)
> + ctrl |= AD5380_CTRL_INT_VREF_2V5;
> +
> + st->vref_reg = 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;
> + }
> +
> + st->vref = regulator_get_voltage(st->vref_reg);
> + } 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:
> + if (!IS_ERR(st->vref_reg))
> + regulator_put(st->vref_reg);
> +
> + kfree(indio_dev->channels);
> +error_free:
> + iio_free_device(indio_dev);
> +error_regmap_exit:
> + regmap_exit(regmap);
> +
> + return ret;
> +}
> +
> +static int __devexit 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);
> + regulator_put(st->vref_reg);
> + }
> +
> + regmap_exit(st->regmap);
> + iio_free_device(indio_dev);
> +
> + 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 __devinit ad5380_spi_probe(struct spi_device *spi)
> +{
> + const struct spi_device_id *id = spi_get_device_id(spi);
> + struct regmap *regmap;
> +
> + regmap = 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 __devexit 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",
> + .owner = THIS_MODULE,
> + },
> + .probe = ad5380_spi_probe,
> + .remove = __devexit_p(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 __devinit ad5380_i2c_probe(struct i2c_client *i2c,
> + const struct i2c_device_id *id)
> +{
> + struct regmap *regmap;
> +
> + regmap = 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 __devexit 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",
> + .owner = THIS_MODULE,
> + },
> + .probe = ad5380_i2c_probe,
> + .remove = __devexit_p(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@xxxxxxxxxx>");
> +MODULE_DESCRIPTION("Analog Devices AD5380/81/82/83/84/90/91/92 DAC");
> +MODULE_LICENSE("GPL v2");
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