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-rw-r--r--drivers/staging/iio/dac/Kconfig39
-rw-r--r--drivers/staging/iio/dac/Makefile3
-rw-r--r--drivers/staging/iio/dac/ad5064.c19
-rw-r--r--drivers/staging/iio/dac/ad5360.c37
-rw-r--r--drivers/staging/iio/dac/ad5380.c676
-rw-r--r--drivers/staging/iio/dac/ad5421.c555
-rw-r--r--drivers/staging/iio/dac/ad5421.h32
-rw-r--r--drivers/staging/iio/dac/ad5446.c201
-rw-r--r--drivers/staging/iio/dac/ad5446.h10
-rw-r--r--drivers/staging/iio/dac/ad5504.c145
-rw-r--r--drivers/staging/iio/dac/ad5504.h5
-rw-r--r--drivers/staging/iio/dac/ad5624r.h4
-rw-r--r--drivers/staging/iio/dac/ad5624r_spi.c140
-rw-r--r--drivers/staging/iio/dac/ad5686.c18
-rw-r--r--drivers/staging/iio/dac/ad5764.c393
-rw-r--r--drivers/staging/iio/dac/ad5791.c28
-rw-r--r--drivers/staging/iio/dac/max517.c14
17 files changed, 1969 insertions, 350 deletions
diff --git a/drivers/staging/iio/dac/Kconfig b/drivers/staging/iio/dac/Kconfig
index fac8549dc8e7..13e27979df24 100644
--- a/drivers/staging/iio/dac/Kconfig
+++ b/drivers/staging/iio/dac/Kconfig
@@ -24,6 +24,29 @@ 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
+ help
+ Say yes here to build support for Analog Devices AD5421 loop-powered
+ digital-to-analog convertors (DAC).
+
+ To compile this driver as module choose M here: the module will be called
+ ad5421.
+
config AD5624R_SPI
tristate "Analog Devices AD5624/44/64R DAC spi driver"
depends on SPI
@@ -37,7 +60,7 @@ config AD5446
help
Say yes here to build support for Analog Devices AD5444, AD5446,
AD5512A, AD5542A, AD5543, AD5553, AD5601, AD5611, AD5620, AD5621,
- AD5640, AD5660 DACs.
+ AD5640, AD5660, AD5662 DACs.
To compile this driver as a module, choose M here: the
module will be called ad5446.
@@ -52,12 +75,22 @@ config AD5504
To compile this driver as a module, choose M here: the
module will be called ad5504.
+config AD5764
+ tristate "Analog Devices AD5764/64R/44/44R DAC driver"
+ depends on SPI_MASTER
+ help
+ Say yes here to build support for Analog Devices AD5764, AD5764R, AD5744,
+ AD5744R Digital to Analog Converter.
+
+ To compile this driver as a module, choose M here: the
+ module will be called ad5764.
+
config AD5791
- tristate "Analog Devices AD5760/AD5780/AD5781/AD5791 DAC SPI driver"
+ tristate "Analog Devices AD5760/AD5780/AD5781/AD5790/AD5791 DAC SPI driver"
depends on SPI
help
Say yes here to build support for Analog Devices AD5760, AD5780,
- AD5781, AD5791 High Resolution Voltage Output Digital to
+ AD5781, AD5790, AD5791 High Resolution Voltage Output Digital to
Analog Converter.
To compile this driver as a module, choose M here: the
diff --git a/drivers/staging/iio/dac/Makefile b/drivers/staging/iio/dac/Makefile
index 07b6f5ebdb52..8ab1d264aab7 100644
--- a/drivers/staging/iio/dac/Makefile
+++ b/drivers/staging/iio/dac/Makefile
@@ -3,10 +3,13 @@
#
obj-$(CONFIG_AD5360) += ad5360.o
+obj-$(CONFIG_AD5380) += ad5380.o
+obj-$(CONFIG_AD5421) += ad5421.o
obj-$(CONFIG_AD5624R_SPI) += ad5624r_spi.o
obj-$(CONFIG_AD5064) += ad5064.o
obj-$(CONFIG_AD5504) += ad5504.o
obj-$(CONFIG_AD5446) += ad5446.o
+obj-$(CONFIG_AD5764) += ad5764.o
obj-$(CONFIG_AD5791) += ad5791.o
obj-$(CONFIG_AD5686) += ad5686.o
obj-$(CONFIG_MAX517) += max517.o
diff --git a/drivers/staging/iio/dac/ad5064.c b/drivers/staging/iio/dac/ad5064.c
index 24279f2ae41f..049a855039c2 100644
--- a/drivers/staging/iio/dac/ad5064.c
+++ b/drivers/staging/iio/dac/ad5064.c
@@ -91,7 +91,7 @@ enum ad5064_type {
.indexed = 1, \
.output = 1, \
.channel = (chan), \
- .info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE), \
+ .info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT, \
.address = AD5064_ADDR_DAC(chan), \
.scan_type = IIO_ST('u', (bits), 16, 20 - (bits)) \
}
@@ -280,14 +280,14 @@ static int ad5064_read_raw(struct iio_dev *indio_dev,
long m)
{
struct ad5064_state *st = iio_priv(indio_dev);
- unsigned long scale_uv;
unsigned int vref;
+ int scale_uv;
switch (m) {
case 0:
*val = st->dac_cache[chan->channel];
return IIO_VAL_INT;
- case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
+ case IIO_CHAN_INFO_SCALE:
vref = st->chip_info->shared_vref ? 0 : chan->channel;
scale_uv = regulator_get_voltage(st->vref_reg[vref].consumer);
if (scale_uv < 0)
@@ -445,18 +445,7 @@ static struct spi_driver ad5064_driver = {
.remove = __devexit_p(ad5064_remove),
.id_table = ad5064_id,
};
-
-static __init int ad5064_spi_init(void)
-{
- return spi_register_driver(&ad5064_driver);
-}
-module_init(ad5064_spi_init);
-
-static __exit void ad5064_spi_exit(void)
-{
- spi_unregister_driver(&ad5064_driver);
-}
-module_exit(ad5064_spi_exit);
+module_spi_driver(ad5064_driver);
MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_DESCRIPTION("Analog Devices AD5064/64-1/44/24 DAC");
diff --git a/drivers/staging/iio/dac/ad5360.c b/drivers/staging/iio/dac/ad5360.c
index 72d0f3f0d6ae..710b256affcc 100644
--- a/drivers/staging/iio/dac/ad5360.c
+++ b/drivers/staging/iio/dac/ad5360.c
@@ -103,10 +103,10 @@ enum ad5360_type {
.type = IIO_VOLTAGE, \
.indexed = 1, \
.output = 1, \
- .info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE) | \
- (1 << IIO_CHAN_INFO_OFFSET_SEPARATE) | \
- (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE) | \
- (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE), \
+ .info_mask = 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)) \
}
@@ -326,21 +326,21 @@ static int ad5360_write_raw(struct iio_dev *indio_dev,
return ad5360_write(indio_dev, AD5360_CMD_WRITE_DATA,
chan->address, val, chan->scan_type.shift);
- case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE):
+ 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 (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE):
+ 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 (1 << IIO_CHAN_INFO_OFFSET_SEPARATE):
+ case IIO_CHAN_INFO_OFFSET:
if (val <= -max_val || val > 0)
return -EINVAL;
@@ -371,8 +371,8 @@ static int ad5360_read_raw(struct iio_dev *indio_dev,
long m)
{
struct ad5360_state *st = iio_priv(indio_dev);
- unsigned long scale_uv;
unsigned int ofs_index;
+ int scale_uv;
int ret;
switch (m) {
@@ -383,7 +383,7 @@ static int ad5360_read_raw(struct iio_dev *indio_dev,
return ret;
*val = ret >> chan->scan_type.shift;
return IIO_VAL_INT;
- case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
+ 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)
@@ -393,21 +393,21 @@ static int ad5360_read_raw(struct iio_dev *indio_dev,
*val = scale_uv / 100000;
*val2 = (scale_uv % 100000) * 10;
return IIO_VAL_INT_PLUS_MICRO;
- case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE):
+ 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 (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE):
+ 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 (1 << IIO_CHAN_INFO_OFFSET_SEPARATE):
+ 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));
@@ -563,18 +563,7 @@ static struct spi_driver ad5360_driver = {
.remove = __devexit_p(ad5360_remove),
.id_table = ad5360_ids,
};
-
-static __init int ad5360_spi_init(void)
-{
- return spi_register_driver(&ad5360_driver);
-}
-module_init(ad5360_spi_init);
-
-static __exit void ad5360_spi_exit(void)
-{
- spi_unregister_driver(&ad5360_driver);
-}
-module_exit(ad5360_spi_exit);
+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");
diff --git a/drivers/staging/iio/dac/ad5380.c b/drivers/staging/iio/dac/ad5380.c
new file mode 100644
index 000000000000..eff97ae05c4b
--- /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_AD5391_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@metafoo.de>");
+MODULE_DESCRIPTION("Analog Devices AD5380/81/82/83/84/90/91/92 DAC");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/iio/dac/ad5421.c b/drivers/staging/iio/dac/ad5421.c
new file mode 100644
index 000000000000..71ee86824763
--- /dev/null
+++ b/drivers/staging/iio/dac/ad5421.c
@@ -0,0 +1,555 @@
+/*
+ * AD5421 Digital to analog converters driver
+ *
+ * Copyright 2011 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/spi/spi.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+
+#include "../iio.h"
+#include "../sysfs.h"
+#include "../events.h"
+#include "dac.h"
+#include "ad5421.h"
+
+
+#define AD5421_REG_DAC_DATA 0x1
+#define AD5421_REG_CTRL 0x2
+#define AD5421_REG_OFFSET 0x3
+#define AD5421_REG_GAIN 0x4
+/* load dac and fault shared the same register number. Writing to it will cause
+ * a dac load command, reading from it will return the fault status register */
+#define AD5421_REG_LOAD_DAC 0x5
+#define AD5421_REG_FAULT 0x5
+#define AD5421_REG_FORCE_ALARM_CURRENT 0x6
+#define AD5421_REG_RESET 0x7
+#define AD5421_REG_START_CONVERSION 0x8
+#define AD5421_REG_NOOP 0x9
+
+#define AD5421_CTRL_WATCHDOG_DISABLE BIT(12)
+#define AD5421_CTRL_AUTO_FAULT_READBACK BIT(11)
+#define AD5421_CTRL_MIN_CURRENT BIT(9)
+#define AD5421_CTRL_ADC_SOURCE_TEMP BIT(8)
+#define AD5421_CTRL_ADC_ENABLE BIT(7)
+#define AD5421_CTRL_PWR_DOWN_INT_VREF BIT(6)
+
+#define AD5421_FAULT_SPI BIT(15)
+#define AD5421_FAULT_PEC BIT(14)
+#define AD5421_FAULT_OVER_CURRENT BIT(13)
+#define AD5421_FAULT_UNDER_CURRENT BIT(12)
+#define AD5421_FAULT_TEMP_OVER_140 BIT(11)
+#define AD5421_FAULT_TEMP_OVER_100 BIT(10)
+#define AD5421_FAULT_UNDER_VOLTAGE_6V BIT(9)
+#define AD5421_FAULT_UNDER_VOLTAGE_12V BIT(8)
+
+/* These bits will cause the fault pin to go high */
+#define AD5421_FAULT_TRIGGER_IRQ \
+ (AD5421_FAULT_SPI | AD5421_FAULT_PEC | AD5421_FAULT_OVER_CURRENT | \
+ AD5421_FAULT_UNDER_CURRENT | AD5421_FAULT_TEMP_OVER_140)
+
+/**
+ * struct ad5421_state - driver instance specific data
+ * @spi: spi_device
+ * @ctrl: control register cache
+ * @current_range: current range which the device is configured for
+ * @data: spi transfer buffers
+ * @fault_mask: software masking of events
+ */
+struct ad5421_state {
+ struct spi_device *spi;
+ unsigned int ctrl;
+ enum ad5421_current_range current_range;
+ unsigned int fault_mask;
+
+ /*
+ * DMA (thus cache coherency maintenance) requires the
+ * transfer buffers to live in their own cache lines.
+ */
+ union {
+ u32 d32;
+ u8 d8[4];
+ } data[2] ____cacheline_aligned;
+};
+
+static const struct iio_chan_spec ad5421_channels[] = {
+ {
+ .type = IIO_CURRENT,
+ .indexed = 1,
+ .output = 1,
+ .channel = 0,
+ .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT |
+ IIO_CHAN_INFO_OFFSET_SHARED_BIT |
+ IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
+ IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
+ .scan_type = IIO_ST('u', 16, 16, 0),
+ .event_mask = IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING) |
+ IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING),
+ },
+ {
+ .type = IIO_TEMP,
+ .channel = -1,
+ .event_mask = IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING),
+ },
+};
+
+static int ad5421_write_unlocked(struct iio_dev *indio_dev,
+ unsigned int reg, unsigned int val)
+{
+ struct ad5421_state *st = iio_priv(indio_dev);
+
+ st->data[0].d32 = cpu_to_be32((reg << 16) | val);
+
+ return spi_write(st->spi, &st->data[0].d8[1], 3);
+}
+
+static int ad5421_write(struct iio_dev *indio_dev, unsigned int reg,
+ unsigned int val)
+{
+ int ret;
+
+ mutex_lock(&indio_dev->mlock);
+ ret = ad5421_write_unlocked(indio_dev, reg, val);
+ mutex_unlock(&indio_dev->mlock);
+
+ return ret;
+}
+
+static int ad5421_read(struct iio_dev *indio_dev, unsigned int reg)
+{
+ struct ad5421_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((1 << 23) | (reg << 16));
+
+ 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 int ad5421_update_ctrl(struct iio_dev *indio_dev, unsigned int set,
+ unsigned int clr)
+{
+ struct ad5421_state *st = iio_priv(indio_dev);
+ unsigned int ret;
+
+ mutex_lock(&indio_dev->mlock);
+
+ st->ctrl &= ~clr;
+ st->ctrl |= set;
+
+ ret = ad5421_write_unlocked(indio_dev, AD5421_REG_CTRL, st->ctrl);
+
+ mutex_unlock(&indio_dev->mlock);
+
+ return ret;
+}
+
+static irqreturn_t ad5421_fault_handler(int irq, void *data)
+{
+ struct iio_dev *indio_dev = data;
+ struct ad5421_state *st = iio_priv(indio_dev);
+ unsigned int fault;
+ unsigned int old_fault = 0;
+ unsigned int events;
+
+ fault = ad5421_read(indio_dev, AD5421_REG_FAULT);
+ if (!fault)
+ return IRQ_NONE;
+
+ /* If we had a fault, this might mean that the DAC has lost its state
+ * and has been reset. Make sure that the control register actually
+ * contains what we expect it to contain. Otherwise the watchdog might
+ * be enabled and we get watchdog timeout faults, which will render the
+ * DAC unusable. */
+ ad5421_update_ctrl(indio_dev, 0, 0);
+
+
+ /* The fault pin stays high as long as a fault condition is present and
+ * it is not possible to mask fault conditions. For certain fault
+ * conditions for example like over-temperature it takes some time
+ * until the fault condition disappears. If we would exit the interrupt
+ * handler immediately after handling the event it would be entered
+ * again instantly. Thus we fall back to polling in case we detect that
+ * a interrupt condition is still present.
+ */
+ do {
+ /* 0xffff is a invalid value for the register and will only be
+ * read if there has been a communication error */
+ if (fault == 0xffff)
+ fault = 0;
+
+ /* we are only interested in new events */
+ events = (old_fault ^ fault) & fault;
+ events &= st->fault_mask;
+
+ if (events & AD5421_FAULT_OVER_CURRENT) {
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_CURRENT,
+ 0,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_RISING),
+ iio_get_time_ns());
+ }
+
+ if (events & AD5421_FAULT_UNDER_CURRENT) {
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_CURRENT,
+ 0,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_FALLING),
+ iio_get_time_ns());
+ }
+
+ if (events & AD5421_FAULT_TEMP_OVER_140) {
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_TEMP,
+ 0,
+ IIO_EV_TYPE_MAG,
+ IIO_EV_DIR_RISING),
+ iio_get_time_ns());
+ }
+
+ old_fault = fault;
+ fault = ad5421_read(indio_dev, AD5421_REG_FAULT);
+
+ /* still active? go to sleep for some time */
+ if (fault & AD5421_FAULT_TRIGGER_IRQ)
+ msleep(1000);
+
+ } while (fault & AD5421_FAULT_TRIGGER_IRQ);
+
+
+ return IRQ_HANDLED;
+}
+
+static void ad5421_get_current_min_max(struct ad5421_state *st,
+ unsigned int *min, unsigned int *max)
+{
+ /* The current range is configured using external pins, which are
+ * usually hard-wired and not run-time switchable. */
+ switch (st->current_range) {
+ case AD5421_CURRENT_RANGE_4mA_20mA:
+ *min = 4000;
+ *max = 20000;
+ break;
+ case AD5421_CURRENT_RANGE_3mA8_21mA:
+ *min = 3800;
+ *max = 21000;
+ break;
+ case AD5421_CURRENT_RANGE_3mA2_24mA:
+ *min = 3200;
+ *max = 24000;
+ break;
+ default:
+ *min = 0;
+ *max = 1;
+ break;
+ }
+}
+
+static inline unsigned int ad5421_get_offset(struct ad5421_state *st)
+{
+ unsigned int min, max;
+
+ ad5421_get_current_min_max(st, &min, &max);
+ return (min * (1 << 16)) / (max - min);
+}
+
+static inline unsigned int ad5421_get_scale(struct ad5421_state *st)
+{
+ unsigned int min, max;
+
+ ad5421_get_current_min_max(st, &min, &max);
+ return ((max - min) * 1000) / (1 << 16);
+}
+
+static int ad5421_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int *val, int *val2, long m)
+{
+ struct ad5421_state *st = iio_priv(indio_dev);
+ int ret;
+
+ if (chan->type != IIO_CURRENT)
+ return -EINVAL;
+
+ switch (m) {
+ case 0:
+ ret = ad5421_read(indio_dev, AD5421_REG_DAC_DATA);
+ if (ret < 0)
+ return ret;
+ *val = ret;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ *val = 0;
+ *val2 = ad5421_get_scale(st);
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_CHAN_INFO_OFFSET:
+ *val = ad5421_get_offset(st);
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_CALIBBIAS:
+ ret = ad5421_read(indio_dev, AD5421_REG_OFFSET);
+ if (ret < 0)
+ return ret;
+ *val = ret - 32768;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_CALIBSCALE:
+ ret = ad5421_read(indio_dev, AD5421_REG_GAIN);
+ if (ret < 0)
+ return ret;
+ *val = ret;
+ return IIO_VAL_INT;
+ }
+
+ return -EINVAL;
+}
+
+static int ad5421_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int val, int val2, long mask)
+{
+ const unsigned int max_val = 1 << 16;
+
+ switch (mask) {
+ case 0:
+ if (val >= max_val || val < 0)
+ return -EINVAL;
+
+ return ad5421_write(indio_dev, AD5421_REG_DAC_DATA, val);
+ case IIO_CHAN_INFO_CALIBBIAS:
+ val += 32768;
+ if (val >= max_val || val < 0)
+ return -EINVAL;
+
+ return ad5421_write(indio_dev, AD5421_REG_OFFSET, val);
+ case IIO_CHAN_INFO_CALIBSCALE:
+ if (val >= max_val || val < 0)
+ return -EINVAL;
+
+ return ad5421_write(indio_dev, AD5421_REG_GAIN, val);
+ default:
+ break;
+ }
+
+ return -EINVAL;
+}
+
+static int ad5421_write_event_config(struct iio_dev *indio_dev,
+ u64 event_code, int state)
+{
+ struct ad5421_state *st = iio_priv(indio_dev);
+ unsigned int mask;
+
+ switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) {
+ case IIO_CURRENT:
+ if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) ==
+ IIO_EV_DIR_RISING)
+ mask = AD5421_FAULT_OVER_CURRENT;
+ else
+ mask = AD5421_FAULT_UNDER_CURRENT;
+ break;
+ case IIO_TEMP:
+ mask = AD5421_FAULT_TEMP_OVER_140;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ mutex_lock(&indio_dev->mlock);
+ if (state)
+ st->fault_mask |= mask;
+ else
+ st->fault_mask &= ~mask;
+ mutex_unlock(&indio_dev->mlock);
+
+ return 0;
+}
+
+static int ad5421_read_event_config(struct iio_dev *indio_dev,
+ u64 event_code)
+{
+ struct ad5421_state *st = iio_priv(indio_dev);
+ unsigned int mask;
+
+ switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) {
+ case IIO_CURRENT:
+ if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) ==
+ IIO_EV_DIR_RISING)
+ mask = AD5421_FAULT_OVER_CURRENT;
+ else
+ mask = AD5421_FAULT_UNDER_CURRENT;
+ break;
+ case IIO_TEMP:
+ mask = AD5421_FAULT_TEMP_OVER_140;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return (bool)(st->fault_mask & mask);
+}
+
+static int ad5421_read_event_value(struct iio_dev *indio_dev, u64 event_code,
+ int *val)
+{
+ int ret;
+
+ switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) {
+ case IIO_CURRENT:
+ ret = ad5421_read(indio_dev, AD5421_REG_DAC_DATA);
+ if (ret < 0)
+ return ret;
+ *val = ret;
+ break;
+ case IIO_TEMP:
+ *val = 140000;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static const struct iio_info ad5421_info = {
+ .read_raw = ad5421_read_raw,
+ .write_raw = ad5421_write_raw,
+ .read_event_config = ad5421_read_event_config,
+ .write_event_config = ad5421_write_event_config,
+ .read_event_value = ad5421_read_event_value,
+ .driver_module = THIS_MODULE,
+};
+
+static int __devinit ad5421_probe(struct spi_device *spi)
+{
+ struct ad5421_platform_data *pdata = dev_get_platdata(&spi->dev);
+ struct iio_dev *indio_dev;
+ struct ad5421_state *st;
+ int ret;
+
+ indio_dev = iio_allocate_device(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->spi = spi;
+
+ indio_dev->dev.parent = &spi->dev;
+ indio_dev->name = "ad5421";
+ indio_dev->info = &ad5421_info;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->channels = ad5421_channels;
+ indio_dev->num_channels = ARRAY_SIZE(ad5421_channels);
+
+ st->ctrl = AD5421_CTRL_WATCHDOG_DISABLE |
+ AD5421_CTRL_AUTO_FAULT_READBACK;
+
+ if (pdata) {
+ st->current_range = pdata->current_range;
+ if (pdata->external_vref)
+ st->ctrl |= AD5421_CTRL_PWR_DOWN_INT_VREF;
+ } else {
+ st->current_range = AD5421_CURRENT_RANGE_4mA_20mA;
+ }
+
+ /* write initial ctrl register value */
+ ad5421_update_ctrl(indio_dev, 0, 0);
+
+ if (spi->irq) {
+ ret = request_threaded_irq(spi->irq,
+ NULL,
+ ad5421_fault_handler,
+ IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
+ "ad5421 fault",
+ indio_dev);
+ if (ret)
+ goto error_free;
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret) {
+ dev_err(&spi->dev, "Failed to register iio device: %d\n", ret);
+ goto error_free_irq;
+ }
+
+ return 0;
+
+error_free_irq:
+ if (spi->irq)
+ free_irq(spi->irq, indio_dev);
+error_free:
+ iio_free_device(indio_dev);
+
+ return ret;
+}
+
+static int __devexit ad5421_remove(struct spi_device *spi)
+{
+ struct iio_dev *indio_dev = spi_get_drvdata(spi);
+
+ iio_device_unregister(indio_dev);
+ if (spi->irq)
+ free_irq(spi->irq, indio_dev);
+ iio_free_device(indio_dev);
+
+ return 0;
+}
+
+static struct spi_driver ad5421_driver = {
+ .driver = {
+ .name = "ad5421",
+ .owner = THIS_MODULE,
+ },
+ .probe = ad5421_probe,
+ .remove = __devexit_p(ad5421_remove),
+};
+
+static __init int ad5421_init(void)
+{
+ return spi_register_driver(&ad5421_driver);
+}
+module_init(ad5421_init);
+
+static __exit void ad5421_exit(void)
+{
+ spi_unregister_driver(&ad5421_driver);
+}
+module_exit(ad5421_exit);
+
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_DESCRIPTION("Analog Devices AD5421 DAC");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:ad5421");
diff --git a/drivers/staging/iio/dac/ad5421.h b/drivers/staging/iio/dac/ad5421.h
new file mode 100644
index 000000000000..cd2bb84ff1b0
--- /dev/null
+++ b/drivers/staging/iio/dac/ad5421.h
@@ -0,0 +1,32 @@
+#ifndef __IIO_DAC_AD5421_H__
+#define __IIO_DAC_AD5421_H__
+
+/*
+ * TODO: This file needs to go into include/linux/iio
+ */
+
+/**
+ * enum ad5421_current_range - Current range the AD5421 is configured for.
+ * @AD5421_CURRENT_RANGE_4mA_20mA: 4 mA to 20 mA (RANGE1,0 pins = 00)
+ * @AD5421_CURRENT_RANGE_3mA8_21mA: 3.8 mA to 21 mA (RANGE1,0 pins = x1)
+ * @AD5421_CURRENT_RANGE_3mA2_24mA: 3.2 mA to 24 mA (RANGE1,0 pins = 10)
+ */
+
+enum ad5421_current_range {
+ AD5421_CURRENT_RANGE_4mA_20mA,
+ AD5421_CURRENT_RANGE_3mA8_21mA,
+ AD5421_CURRENT_RANGE_3mA2_24mA,
+};
+
+/**
+ * struct ad5421_platform_data - AD5421 DAC driver platform data
+ * @external_vref: whether an external reference voltage is used or not
+ * @current_range: Current range the AD5421 is configured for
+ */
+
+struct ad5421_platform_data {
+ bool external_vref;
+ enum ad5421_current_range current_range;
+};
+
+#endif
diff --git a/drivers/staging/iio/dac/ad5446.c b/drivers/staging/iio/dac/ad5446.c
index e1c204d51d8c..693e7482524c 100644
--- a/drivers/staging/iio/dac/ad5446.c
+++ b/drivers/staging/iio/dac/ad5446.c
@@ -26,19 +26,17 @@
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));
+ st->data.d16 = cpu_to_be16(AD5446_LOAD | val);
}
static void ad5542_store_sample(struct ad5446_state *st, unsigned val)
{
- st->data.d16 = cpu_to_be16(val << st->chip_info->left_shift);
+ st->data.d16 = cpu_to_be16(val);
}
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));
+ st->data.d16 = cpu_to_be16(AD5620_LOAD | val);
}
static void ad5660_store_sample(struct ad5446_state *st, unsigned val)
@@ -63,50 +61,6 @@ static void ad5660_store_pwr_down(struct ad5446_state *st, unsigned mode)
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)
@@ -189,22 +143,20 @@ static IIO_DEVICE_ATTR(out_voltage0_powerdown, S_IRUGO | S_IWUSR,
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,
+static umode_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;
+ umode_t mode = attr->mode;
if (!st->chip_info->store_pwr_down &&
(attr == &iio_dev_attr_out_voltage0_powerdown.dev_attr.attr ||
@@ -223,121 +175,148 @@ static const struct attribute_group ad5446_attribute_group = {
.is_visible = ad5446_attr_is_visible,
};
+#define AD5446_CHANNEL(bits, storage, shift) { \
+ .type = IIO_VOLTAGE, \
+ .indexed = 1, \
+ .output = 1, \
+ .channel = 0, \
+ .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT, \
+ .scan_type = IIO_ST('u', (bits), (storage), (shift)) \
+}
+
static const struct ad5446_chip_info ad5446_chip_info_tbl[] = {
[ID_AD5444] = {
- .bits = 12,
- .storagebits = 16,
- .left_shift = 2,
+ .channel = AD5446_CHANNEL(12, 16, 2),
.store_sample = ad5446_store_sample,
},
[ID_AD5446] = {
- .bits = 14,
- .storagebits = 16,
- .left_shift = 0,
+ .channel = AD5446_CHANNEL(14, 16, 0),
.store_sample = ad5446_store_sample,
},
[ID_AD5541A] = {
- .bits = 16,
- .storagebits = 16,
- .left_shift = 0,
+ .channel = AD5446_CHANNEL(16, 16, 0),
.store_sample = ad5542_store_sample,
},
[ID_AD5542A] = {
- .bits = 16,
- .storagebits = 16,
- .left_shift = 0,
+ .channel = AD5446_CHANNEL(16, 16, 0),
.store_sample = ad5542_store_sample,
},
[ID_AD5543] = {
- .bits = 16,
- .storagebits = 16,
- .left_shift = 0,
+ .channel = AD5446_CHANNEL(16, 16, 0),
.store_sample = ad5542_store_sample,
},
[ID_AD5512A] = {
- .bits = 12,
- .storagebits = 16,
- .left_shift = 4,
+ .channel = AD5446_CHANNEL(12, 16, 4),
.store_sample = ad5542_store_sample,
},
[ID_AD5553] = {
- .bits = 14,
- .storagebits = 16,
- .left_shift = 0,
+ .channel = AD5446_CHANNEL(14, 16, 0),
.store_sample = ad5542_store_sample,
},
[ID_AD5601] = {
- .bits = 8,
- .storagebits = 16,
- .left_shift = 6,
+ .channel = AD5446_CHANNEL(8, 16, 6),
.store_sample = ad5542_store_sample,
.store_pwr_down = ad5620_store_pwr_down,
},
[ID_AD5611] = {
- .bits = 10,
- .storagebits = 16,
- .left_shift = 4,
+ .channel = AD5446_CHANNEL(10, 16, 4),
.store_sample = ad5542_store_sample,
.store_pwr_down = ad5620_store_pwr_down,
},
[ID_AD5621] = {
- .bits = 12,
- .storagebits = 16,
- .left_shift = 2,
+ .channel = AD5446_CHANNEL(12, 16, 2),
.store_sample = ad5542_store_sample,
.store_pwr_down = ad5620_store_pwr_down,
},
[ID_AD5620_2500] = {
- .bits = 12,
- .storagebits = 16,
- .left_shift = 2,
+ .channel = AD5446_CHANNEL(12, 16, 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,
+ .channel = AD5446_CHANNEL(12, 16, 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,
+ .channel = AD5446_CHANNEL(14, 16, 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,
+ .channel = AD5446_CHANNEL(14, 16, 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,
+ .channel = AD5446_CHANNEL(16, 16, 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,
+ .channel = AD5446_CHANNEL(16, 16, 0),
.int_vref_mv = 1250,
.store_sample = ad5660_store_sample,
.store_pwr_down = ad5660_store_pwr_down,
},
};
+static int ad5446_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val,
+ int *val2,
+ long m)
+{
+ struct ad5446_state *st = iio_priv(indio_dev);
+ unsigned long scale_uv;
+
+ switch (m) {
+ case IIO_CHAN_INFO_SCALE:
+ scale_uv = (st->vref_mv * 1000) >> chan->scan_type.realbits;
+ *val = scale_uv / 1000;
+ *val2 = (scale_uv % 1000) * 1000;
+ return IIO_VAL_INT_PLUS_MICRO;
+
+ }
+ return -EINVAL;
+}
+
+static int ad5446_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val,
+ int val2,
+ long mask)
+{
+ struct ad5446_state *st = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case 0:
+ if (val >= (1 << chan->scan_type.realbits) || val < 0)
+ return -EINVAL;
+
+ val <<= chan->scan_type.shift;
+ 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);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
static const struct iio_info ad5446_info = {
+ .read_raw = ad5446_read_raw,
+ .write_raw = ad5446_write_raw,
.attrs = &ad5446_attribute_group,
.driver_module = THIS_MODULE,
};
@@ -376,11 +355,13 @@ static int __devinit ad5446_probe(struct spi_device *spi)
indio_dev->name = spi_get_device_id(spi)->name;
indio_dev->info = &ad5446_info;
indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->channels = &st->chip_info->channel;
+ indio_dev->num_channels = 1;
/* Setup default message */
st->xfer.tx_buf = &st->data;
- st->xfer.len = st->chip_info->storagebits / 8;
+ st->xfer.len = st->chip_info->channel.scan_type.storagebits / 8;
spi_message_init(&st->msg);
spi_message_add_tail(&st->xfer, &st->msg);
@@ -454,31 +435,19 @@ static const struct spi_device_id ad5446_id[] = {
{"ad5660-1250", ID_AD5660_1250},
{}
};
+MODULE_DEVICE_TABLE(spi, ad5446_id);
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_spi_driver(ad5446_driver);
MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
MODULE_DESCRIPTION("Analog Devices AD5444/AD5446 DAC");
MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("spi:ad5446");
diff --git a/drivers/staging/iio/dac/ad5446.h b/drivers/staging/iio/dac/ad5446.h
index 7118d653ac3e..4ea3476fb065 100644
--- a/drivers/staging/iio/dac/ad5446.h
+++ b/drivers/staging/iio/dac/ad5446.h
@@ -25,8 +25,6 @@
#define AD5660_PWRDWN_100k (0x2 << 16) /* Power-down: 100kOhm to GND */
#define AD5660_PWRDWN_TRISTATE (0x3 << 16) /* Power-down: Three-state */
-#define RES_MASK(bits) ((1 << (bits)) - 1)
-
#define MODE_PWRDWN_1k 0x1
#define MODE_PWRDWN_100k 0x2
#define MODE_PWRDWN_TRISTATE 0x3
@@ -62,18 +60,14 @@ struct ad5446_state {
/**
* struct ad5446_chip_info - chip specific information
- * @bits: accuracy of the DAC in bits
- * @storagebits: number of bits written to the DAC
- * @left_shift: number of bits the datum must be shifted
+ * @channel: channel spec for the DAC
* @int_vref_mv: AD5620/40/60: the internal reference voltage
* @store_sample: chip specific helper function to store the datum
* @store_sample: chip specific helper function to store the powerpown cmd
*/
struct ad5446_chip_info {
- u8 bits;
- u8 storagebits;
- u8 left_shift;
+ struct iio_chan_spec channel;
u16 int_vref_mv;
void (*store_sample) (struct ad5446_state *st, unsigned val);
void (*store_pwr_down) (struct ad5446_state *st, unsigned mode);
diff --git a/drivers/staging/iio/dac/ad5504.c b/drivers/staging/iio/dac/ad5504.c
index 60dd6404d689..bc17205fe722 100644
--- a/drivers/staging/iio/dac/ad5504.c
+++ b/drivers/staging/iio/dac/ad5504.c
@@ -18,9 +18,27 @@
#include "../iio.h"
#include "../sysfs.h"
+#include "../events.h"
#include "dac.h"
#include "ad5504.h"
+#define AD5504_CHANNEL(_chan) { \
+ .type = IIO_VOLTAGE, \
+ .indexed = 1, \
+ .output = 1, \
+ .channel = (_chan), \
+ .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT, \
+ .address = AD5504_ADDR_DAC(_chan), \
+ .scan_type = IIO_ST('u', 12, 16, 0), \
+}
+
+static const struct iio_chan_spec ad5504_channels[] = {
+ AD5504_CHANNEL(0),
+ AD5504_CHANNEL(1),
+ AD5504_CHANNEL(2),
+ AD5504_CHANNEL(3),
+};
+
static int ad5504_spi_write(struct spi_device *spi, u8 addr, u16 val)
{
u16 tmp = cpu_to_be16(AD5504_CMD_WRITE |
@@ -30,13 +48,14 @@ static int ad5504_spi_write(struct spi_device *spi, u8 addr, u16 val)
return spi_write(spi, (u8 *)&tmp, 2);
}
-static int ad5504_spi_read(struct spi_device *spi, u8 addr, u16 *val)
+static int ad5504_spi_read(struct spi_device *spi, u8 addr)
{
u16 tmp = cpu_to_be16(AD5504_CMD_READ | AD5504_ADDR(addr));
+ u16 val;
int ret;
struct spi_transfer t = {
.tx_buf = &tmp,
- .rx_buf = val,
+ .rx_buf = &val,
.len = 2,
};
struct spi_message m;
@@ -45,44 +64,61 @@ static int ad5504_spi_read(struct spi_device *spi, u8 addr, u16 *val)
spi_message_add_tail(&t, &m);
ret = spi_sync(spi, &m);
- *val = be16_to_cpu(*val) & AD5504_RES_MASK;
+ if (ret < 0)
+ return ret;
- return ret;
+ return be16_to_cpu(val) & AD5504_RES_MASK;
}
-static ssize_t ad5504_write_dac(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
+static int ad5504_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val,
+ int *val2,
+ long m)
{
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct ad5504_state *st = iio_priv(indio_dev);
- struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
- long readin;
+ unsigned long scale_uv;
int ret;
- ret = strict_strtol(buf, 10, &readin);
- if (ret)
- return ret;
+ switch (m) {
+ case 0:
+ ret = ad5504_spi_read(st->spi, chan->address);
+ if (ret < 0)
+ return ret;
- ret = ad5504_spi_write(st->spi, this_attr->address, readin);
- return ret ? ret : len;
+ *val = ret;
+
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ scale_uv = (st->vref_mv * 1000) >> chan->scan_type.realbits;
+ *val = scale_uv / 1000;
+ *val2 = (scale_uv % 1000) * 1000;
+ return IIO_VAL_INT_PLUS_MICRO;
+
+ }
+ return -EINVAL;
}
-static ssize_t ad5504_read_dac(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static int ad5504_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val,
+ int val2,
+ long mask)
{
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct ad5504_state *st = iio_priv(indio_dev);
- struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
int ret;
- u16 val;
- ret = ad5504_spi_read(st->spi, this_attr->address, &val);
- if (ret)
- return ret;
+ switch (mask) {
+ case 0:
+ if (val >= (1 << chan->scan_type.realbits) || val < 0)
+ return -EINVAL;
+
+ return ad5504_spi_write(st->spi, chan->address, val);
+ default:
+ ret = -EINVAL;
+ }
- return sprintf(buf, "%d\n", val);
+ return -EINVAL;
}
static ssize_t ad5504_read_powerdown_mode(struct device *dev,
@@ -157,32 +193,6 @@ static ssize_t ad5504_write_dac_powerdown(struct device *dev,
return ret ? ret : len;
}
-static ssize_t ad5504_show_scale(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
- struct ad5504_state *st = iio_priv(indio_dev);
- /* Corresponds to Vref / 2^(bits) */
- unsigned int scale_uv = (st->vref_mv * 1000) >> AD5505_BITS;
-
- return sprintf(buf, "%d.%03d\n", scale_uv / 1000, scale_uv % 1000);
-}
-static IIO_DEVICE_ATTR(out_voltage_scale, S_IRUGO, ad5504_show_scale, NULL, 0);
-
-#define IIO_DEV_ATTR_OUT_RW_RAW(_num, _show, _store, _addr) \
- IIO_DEVICE_ATTR(out_voltage##_num##_raw, \
- S_IRUGO | S_IWUSR, _show, _store, _addr)
-
-static IIO_DEV_ATTR_OUT_RW_RAW(0, ad5504_read_dac,
- ad5504_write_dac, AD5504_ADDR_DAC0);
-static IIO_DEV_ATTR_OUT_RW_RAW(1, ad5504_read_dac,
- ad5504_write_dac, AD5504_ADDR_DAC1);
-static IIO_DEV_ATTR_OUT_RW_RAW(2, ad5504_read_dac,
- ad5504_write_dac, AD5504_ADDR_DAC2);
-static IIO_DEV_ATTR_OUT_RW_RAW(3, ad5504_read_dac,
- ad5504_write_dac, AD5504_ADDR_DAC3);
-
static IIO_DEVICE_ATTR(out_voltage_powerdown_mode, S_IRUGO |
S_IWUSR, ad5504_read_powerdown_mode,
ad5504_write_powerdown_mode, 0);
@@ -203,17 +213,12 @@ static IIO_DEV_ATTR_DAC_POWERDOWN(3, ad5504_read_dac_powerdown,
ad5504_write_dac_powerdown, 3);
static struct attribute *ad5504_attributes[] = {
- &iio_dev_attr_out_voltage0_raw.dev_attr.attr,
- &iio_dev_attr_out_voltage1_raw.dev_attr.attr,
- &iio_dev_attr_out_voltage2_raw.dev_attr.attr,
- &iio_dev_attr_out_voltage3_raw.dev_attr.attr,
&iio_dev_attr_out_voltage0_powerdown.dev_attr.attr,
&iio_dev_attr_out_voltage1_powerdown.dev_attr.attr,
&iio_dev_attr_out_voltage2_powerdown.dev_attr.attr,
&iio_dev_attr_out_voltage3_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,
- &iio_dev_attr_out_voltage_scale.dev_attr.attr,
NULL,
};
@@ -222,11 +227,9 @@ static const struct attribute_group ad5504_attribute_group = {
};
static struct attribute *ad5501_attributes[] = {
- &iio_dev_attr_out_voltage0_raw.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,
- &iio_dev_attr_out_voltage_scale.dev_attr.attr,
NULL,
};
@@ -261,12 +264,16 @@ static irqreturn_t ad5504_event_handler(int irq, void *private)
}
static const struct iio_info ad5504_info = {
+ .write_raw = ad5504_write_raw,
+ .read_raw = ad5504_read_raw,
.attrs = &ad5504_attribute_group,
.event_attrs = &ad5504_ev_attribute_group,
.driver_module = THIS_MODULE,
};
static const struct iio_info ad5501_info = {
+ .write_raw = ad5504_write_raw,
+ .read_raw = ad5504_read_raw,
.attrs = &ad5501_attribute_group,
.event_attrs = &ad5504_ev_attribute_group,
.driver_module = THIS_MODULE,
@@ -307,10 +314,14 @@ static int __devinit ad5504_probe(struct spi_device *spi)
st->spi = spi;
indio_dev->dev.parent = &spi->dev;
indio_dev->name = spi_get_device_id(st->spi)->name;
- if (spi_get_device_id(st->spi)->driver_data == ID_AD5501)
+ if (spi_get_device_id(st->spi)->driver_data == ID_AD5501) {
indio_dev->info = &ad5501_info;
- else
+ indio_dev->num_channels = 1;
+ } else {
indio_dev->info = &ad5504_info;
+ indio_dev->num_channels = 4;
+ }
+ indio_dev->channels = ad5504_channels;
indio_dev->modes = INDIO_DIRECT_MODE;
if (spi->irq) {
@@ -367,6 +378,7 @@ static const struct spi_device_id ad5504_id[] = {
{"ad5501", ID_AD5501},
{}
};
+MODULE_DEVICE_TABLE(spi, ad5504_id);
static struct spi_driver ad5504_driver = {
.driver = {
@@ -377,18 +389,7 @@ static struct spi_driver ad5504_driver = {
.remove = __devexit_p(ad5504_remove),
.id_table = ad5504_id,
};
-
-static __init int ad5504_spi_init(void)
-{
- return spi_register_driver(&ad5504_driver);
-}
-module_init(ad5504_spi_init);
-
-static __exit void ad5504_spi_exit(void)
-{
- spi_unregister_driver(&ad5504_driver);
-}
-module_exit(ad5504_spi_exit);
+module_spi_driver(ad5504_driver);
MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
MODULE_DESCRIPTION("Analog Devices AD5501/AD5501 DAC");
diff --git a/drivers/staging/iio/dac/ad5504.h b/drivers/staging/iio/dac/ad5504.h
index 85beb1dd29b9..afe09522f53c 100644
--- a/drivers/staging/iio/dac/ad5504.h
+++ b/drivers/staging/iio/dac/ad5504.h
@@ -18,10 +18,7 @@
/* Registers */
#define AD5504_ADDR_NOOP 0
-#define AD5504_ADDR_DAC0 1
-#define AD5504_ADDR_DAC1 2
-#define AD5504_ADDR_DAC2 3
-#define AD5504_ADDR_DAC3 4
+#define AD5504_ADDR_DAC(x) ((x) + 1)
#define AD5504_ADDR_ALL_DAC 5
#define AD5504_ADDR_CTRL 7
diff --git a/drivers/staging/iio/dac/ad5624r.h b/drivers/staging/iio/dac/ad5624r.h
index b71c6a03e780..5dca3028cdfd 100644
--- a/drivers/staging/iio/dac/ad5624r.h
+++ b/drivers/staging/iio/dac/ad5624r.h
@@ -32,12 +32,12 @@
/**
* struct ad5624r_chip_info - chip specific information
- * @bits: accuracy of the DAC in bits
+ * @channels: channel spec for the DAC
* @int_vref_mv: AD5620/40/60: the internal reference voltage
*/
struct ad5624r_chip_info {
- u8 bits;
+ const struct iio_chan_spec *channels;
u16 int_vref_mv;
};
diff --git a/drivers/staging/iio/dac/ad5624r_spi.c b/drivers/staging/iio/dac/ad5624r_spi.c
index 284d87900362..10c7484366ef 100644
--- a/drivers/staging/iio/dac/ad5624r_spi.c
+++ b/drivers/staging/iio/dac/ad5624r_spi.c
@@ -21,29 +21,51 @@
#include "dac.h"
#include "ad5624r.h"
+#define AD5624R_CHANNEL(_chan, _bits) { \
+ .type = IIO_VOLTAGE, \
+ .indexed = 1, \
+ .output = 1, \
+ .channel = (_chan), \
+ .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT, \
+ .address = (_chan), \
+ .scan_type = IIO_ST('u', (_bits), 16, 16 - (_bits)), \
+}
+
+#define DECLARE_AD5624R_CHANNELS(_name, _bits) \
+ const struct iio_chan_spec _name##_channels[] = { \
+ AD5624R_CHANNEL(0, _bits), \
+ AD5624R_CHANNEL(1, _bits), \
+ AD5624R_CHANNEL(2, _bits), \
+ AD5624R_CHANNEL(3, _bits), \
+}
+
+static DECLARE_AD5624R_CHANNELS(ad5624r, 12);
+static DECLARE_AD5624R_CHANNELS(ad5644r, 14);
+static DECLARE_AD5624R_CHANNELS(ad5664r, 16);
+
static const struct ad5624r_chip_info ad5624r_chip_info_tbl[] = {
[ID_AD5624R3] = {
- .bits = 12,
- .int_vref_mv = 1250,
- },
- [ID_AD5644R3] = {
- .bits = 14,
- .int_vref_mv = 1250,
- },
- [ID_AD5664R3] = {
- .bits = 16,
+ .channels = ad5624r_channels,
.int_vref_mv = 1250,
},
[ID_AD5624R5] = {
- .bits = 12,
+ .channels = ad5624r_channels,
.int_vref_mv = 2500,
},
+ [ID_AD5644R3] = {
+ .channels = ad5644r_channels,
+ .int_vref_mv = 1250,
+ },
[ID_AD5644R5] = {
- .bits = 14,
+ .channels = ad5644r_channels,
.int_vref_mv = 2500,
},
+ [ID_AD5664R3] = {
+ .channels = ad5664r_channels,
+ .int_vref_mv = 1250,
+ },
[ID_AD5664R5] = {
- .bits = 16,
+ .channels = ad5664r_channels,
.int_vref_mv = 2500,
},
};
@@ -70,24 +92,49 @@ static int ad5624r_spi_write(struct spi_device *spi,
return spi_write(spi, msg, 3);
}
-static ssize_t ad5624r_write_dac(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
+static int ad5624r_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val,
+ int *val2,
+ long m)
{
- long readin;
- int ret;
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct ad5624r_state *st = iio_priv(indio_dev);
- struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+ unsigned long scale_uv;
- ret = strict_strtol(buf, 10, &readin);
- if (ret)
- return ret;
+ switch (m) {
+ case IIO_CHAN_INFO_SCALE:
+ scale_uv = (st->vref_mv * 1000) >> chan->scan_type.realbits;
+ *val = scale_uv / 1000;
+ *val2 = (scale_uv % 1000) * 1000;
+ return IIO_VAL_INT_PLUS_MICRO;
- ret = ad5624r_spi_write(st->us, AD5624R_CMD_WRITE_INPUT_N_UPDATE_N,
- this_attr->address, readin,
- st->chip_info->bits);
- return ret ? ret : len;
+ }
+ return -EINVAL;
+}
+
+static int ad5624r_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val,
+ int val2,
+ long mask)
+{
+ struct ad5624r_state *st = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case 0:
+ if (val >= (1 << chan->scan_type.realbits) || val < 0)
+ return -EINVAL;
+
+ return ad5624r_spi_write(st->us,
+ AD5624R_CMD_WRITE_INPUT_N_UPDATE_N,
+ chan->address, val,
+ chan->scan_type.shift);
+ default:
+ ret = -EINVAL;
+ }
+
+ return -EINVAL;
}
static ssize_t ad5624r_read_powerdown_mode(struct device *dev,
@@ -161,24 +208,6 @@ static ssize_t ad5624r_write_dac_powerdown(struct device *dev,
return ret ? ret : len;
}
-static ssize_t ad5624r_show_scale(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
- struct ad5624r_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, ad5624r_show_scale, NULL, 0);
-
-static IIO_DEV_ATTR_OUT_RAW(0, ad5624r_write_dac, AD5624R_ADDR_DAC0);
-static IIO_DEV_ATTR_OUT_RAW(1, ad5624r_write_dac, AD5624R_ADDR_DAC1);
-static IIO_DEV_ATTR_OUT_RAW(2, ad5624r_write_dac, AD5624R_ADDR_DAC2);
-static IIO_DEV_ATTR_OUT_RAW(3, ad5624r_write_dac, AD5624R_ADDR_DAC3);
-
static IIO_DEVICE_ATTR(out_voltage_powerdown_mode, S_IRUGO |
S_IWUSR, ad5624r_read_powerdown_mode,
ad5624r_write_powerdown_mode, 0);
@@ -200,17 +229,12 @@ static IIO_DEV_ATTR_DAC_POWERDOWN(3, ad5624r_read_dac_powerdown,
ad5624r_write_dac_powerdown, 3);
static struct attribute *ad5624r_attributes[] = {
- &iio_dev_attr_out_voltage0_raw.dev_attr.attr,
- &iio_dev_attr_out_voltage1_raw.dev_attr.attr,
- &iio_dev_attr_out_voltage2_raw.dev_attr.attr,
- &iio_dev_attr_out_voltage3_raw.dev_attr.attr,
&iio_dev_attr_out_voltage0_powerdown.dev_attr.attr,
&iio_dev_attr_out_voltage1_powerdown.dev_attr.attr,
&iio_dev_attr_out_voltage2_powerdown.dev_attr.attr,
&iio_dev_attr_out_voltage3_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,
- &iio_dev_attr_out_voltage_scale.dev_attr.attr,
NULL,
};
@@ -219,6 +243,8 @@ static const struct attribute_group ad5624r_attribute_group = {
};
static const struct iio_info ad5624r_info = {
+ .write_raw = ad5624r_write_raw,
+ .read_raw = ad5624r_read_raw,
.attrs = &ad5624r_attribute_group,
.driver_module = THIS_MODULE,
};
@@ -259,6 +285,8 @@ static int __devinit ad5624r_probe(struct spi_device *spi)
indio_dev->name = spi_get_device_id(spi)->name;
indio_dev->info = &ad5624r_info;
indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->channels = st->chip_info->channels;
+ indio_dev->num_channels = AD5624R_DAC_CHANNELS;
ret = ad5624r_spi_write(spi, AD5624R_CMD_INTERNAL_REFER_SETUP, 0,
!!voltage_uv, 16);
@@ -307,6 +335,7 @@ static const struct spi_device_id ad5624r_id[] = {
{"ad5664r5", ID_AD5664R5},
{}
};
+MODULE_DEVICE_TABLE(spi, ad5624r_id);
static struct spi_driver ad5624r_driver = {
.driver = {
@@ -317,18 +346,7 @@ static struct spi_driver ad5624r_driver = {
.remove = __devexit_p(ad5624r_remove),
.id_table = ad5624r_id,
};
-
-static __init int ad5624r_spi_init(void)
-{
- return spi_register_driver(&ad5624r_driver);
-}
-module_init(ad5624r_spi_init);
-
-static __exit void ad5624r_spi_exit(void)
-{
- spi_unregister_driver(&ad5624r_driver);
-}
-module_exit(ad5624r_spi_exit);
+module_spi_driver(ad5624r_driver);
MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
MODULE_DESCRIPTION("Analog Devices AD5624/44/64R DAC spi driver");
diff --git a/drivers/staging/iio/dac/ad5686.c b/drivers/staging/iio/dac/ad5686.c
index 974c6f5b60c4..ce2d6193dd89 100644
--- a/drivers/staging/iio/dac/ad5686.c
+++ b/drivers/staging/iio/dac/ad5686.c
@@ -99,7 +99,7 @@ enum ad5686_supported_device_ids {
.indexed = 1, \
.output = 1, \
.channel = chan, \
- .info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED), \
+ .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT, \
.address = AD5686_ADDR_DAC(chan), \
.scan_type = IIO_ST('u', bits, 16, shift) \
}
@@ -306,7 +306,7 @@ static int ad5686_read_raw(struct iio_dev *indio_dev,
*val = ret;
return IIO_VAL_INT;
break;
- case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+ case IIO_CHAN_INFO_SCALE:
scale_uv = (st->vref_mv * 100000)
>> (chan->scan_type.realbits);
*val = scale_uv / 100000;
@@ -437,6 +437,7 @@ static const struct spi_device_id ad5686_id[] = {
{"ad5686", ID_AD5686},
{}
};
+MODULE_DEVICE_TABLE(spi, ad5686_id);
static struct spi_driver ad5686_driver = {
.driver = {
@@ -447,18 +448,7 @@ static struct spi_driver ad5686_driver = {
.remove = __devexit_p(ad5686_remove),
.id_table = ad5686_id,
};
-
-static __init int ad5686_spi_init(void)
-{
- return spi_register_driver(&ad5686_driver);
-}
-module_init(ad5686_spi_init);
-
-static __exit void ad5686_spi_exit(void)
-{
- spi_unregister_driver(&ad5686_driver);
-}
-module_exit(ad5686_spi_exit);
+module_spi_driver(ad5686_driver);
MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
MODULE_DESCRIPTION("Analog Devices AD5686/85/84 DAC");
diff --git a/drivers/staging/iio/dac/ad5764.c b/drivers/staging/iio/dac/ad5764.c
new file mode 100644
index 000000000000..ff91480ae65c
--- /dev/null
+++ b/drivers/staging/iio/dac/ad5764.c
@@ -0,0 +1,393 @@
+/*
+ * Analog devices AD5764, AD5764R, AD5744, AD5744R quad-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 "../iio.h"
+#include "../sysfs.h"
+#include "dac.h"
+
+#define AD5764_REG_SF_NOP 0x0
+#define AD5764_REG_SF_CONFIG 0x1
+#define AD5764_REG_SF_CLEAR 0x4
+#define AD5764_REG_SF_LOAD 0x5
+#define AD5764_REG_DATA(x) ((2 << 3) | (x))
+#define AD5764_REG_COARSE_GAIN(x) ((3 << 3) | (x))
+#define AD5764_REG_FINE_GAIN(x) ((4 << 3) | (x))
+#define AD5764_REG_OFFSET(x) ((5 << 3) | (x))
+
+#define AD5764_NUM_CHANNELS 4
+
+/**
+ * struct ad5764_chip_info - chip specific information
+ * @int_vref: Value of the internal reference voltage in uV - 0 if external
+ * reference voltage is used
+ * @channel channel specification
+*/
+
+struct ad5764_chip_info {
+ unsigned long int_vref;
+ const struct iio_chan_spec *channels;
+};
+
+/**
+ * struct ad5764_state - driver instance specific data
+ * @spi: spi_device
+ * @chip_info: chip info
+ * @vref_reg: vref supply regulators
+ * @data: spi transfer buffers
+ */
+
+struct ad5764_state {
+ struct spi_device *spi;
+ const struct ad5764_chip_info *chip_info;
+ struct regulator_bulk_data vref_reg[2];
+
+ /*
+ * 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 ad5764_type {
+ ID_AD5744,
+ ID_AD5744R,
+ ID_AD5764,
+ ID_AD5764R,
+};
+
+#define AD5764_CHANNEL(_chan, _bits) { \
+ .type = IIO_VOLTAGE, \
+ .indexed = 1, \
+ .output = 1, \
+ .channel = (_chan), \
+ .address = (_chan), \
+ .info_mask = IIO_CHAN_INFO_OFFSET_SHARED_BIT | \
+ IIO_CHAN_INFO_SCALE_SEPARATE_BIT | \
+ IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | \
+ IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, \
+ .scan_type = IIO_ST('u', (_bits), 16, 16 - (_bits)) \
+}
+
+#define DECLARE_AD5764_CHANNELS(_name, _bits) \
+const struct iio_chan_spec _name##_channels[] = { \
+ AD5764_CHANNEL(0, (_bits)), \
+ AD5764_CHANNEL(1, (_bits)), \
+ AD5764_CHANNEL(2, (_bits)), \
+ AD5764_CHANNEL(3, (_bits)), \
+};
+
+static DECLARE_AD5764_CHANNELS(ad5764, 16);
+static DECLARE_AD5764_CHANNELS(ad5744, 14);
+
+static const struct ad5764_chip_info ad5764_chip_infos[] = {
+ [ID_AD5744] = {
+ .int_vref = 0,
+ .channels = ad5744_channels,
+ },
+ [ID_AD5744R] = {
+ .int_vref = 5000000,
+ .channels = ad5744_channels,
+ },
+ [ID_AD5764] = {
+ .int_vref = 0,
+ .channels = ad5764_channels,
+ },
+ [ID_AD5764R] = {
+ .int_vref = 5000000,
+ .channels = ad5764_channels,
+ },
+};
+
+static int ad5764_write(struct iio_dev *indio_dev, unsigned int reg,
+ unsigned int val)
+{
+ struct ad5764_state *st = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&indio_dev->mlock);
+ st->data[0].d32 = cpu_to_be32((reg << 16) | val);
+
+ ret = spi_write(st->spi, &st->data[0].d8[1], 3);
+ mutex_unlock(&indio_dev->mlock);
+
+ return ret;
+}
+
+static int ad5764_read(struct iio_dev *indio_dev, unsigned int reg,
+ unsigned int *val)
+{
+ struct ad5764_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((1 << 23) | (reg << 16));
+
+ ret = spi_sync(st->spi, &m);
+ if (ret >= 0)
+ *val = be32_to_cpu(st->data[1].d32) & 0xffff;
+
+ mutex_unlock(&indio_dev->mlock);
+
+ return ret;
+}
+
+static int ad5764_chan_info_to_reg(struct iio_chan_spec const *chan, long info)
+{
+ switch (info) {
+ case 0:
+ return AD5764_REG_DATA(chan->address);
+ case IIO_CHAN_INFO_CALIBBIAS:
+ return AD5764_REG_OFFSET(chan->address);
+ case IIO_CHAN_INFO_CALIBSCALE:
+ return AD5764_REG_FINE_GAIN(chan->address);
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static int ad5764_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int val, int val2, long info)
+{
+ const int max_val = (1 << chan->scan_type.realbits);
+ unsigned int reg;
+
+ switch (info) {
+ case 0:
+ if (val >= max_val || val < 0)
+ return -EINVAL;
+ val <<= chan->scan_type.shift;
+ break;
+ case IIO_CHAN_INFO_CALIBBIAS:
+ if (val >= 128 || val < -128)
+ return -EINVAL;
+ break;
+ case IIO_CHAN_INFO_CALIBSCALE:
+ if (val >= 32 || val < -32)
+ return -EINVAL;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ reg = ad5764_chan_info_to_reg(chan, info);
+ return ad5764_write(indio_dev, reg, (u16)val);
+}
+
+static int ad5764_get_channel_vref(struct ad5764_state *st,
+ unsigned int channel)
+{
+ if (st->chip_info->int_vref)
+ return st->chip_info->int_vref;
+ else
+ return regulator_get_voltage(st->vref_reg[channel / 2].consumer);
+}
+
+static int ad5764_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int *val, int *val2, long info)
+{
+ struct ad5764_state *st = iio_priv(indio_dev);
+ unsigned long scale_uv;
+ unsigned int reg;
+ int vref;
+ int ret;
+
+ switch (info) {
+ case 0:
+ reg = AD5764_REG_DATA(chan->address);
+ ret = ad5764_read(indio_dev, reg, val);
+ if (ret < 0)
+ return ret;
+ *val >>= chan->scan_type.shift;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_CALIBBIAS:
+ reg = AD5764_REG_OFFSET(chan->address);
+ ret = ad5764_read(indio_dev, reg, val);
+ if (ret < 0)
+ return ret;
+ *val = sign_extend32(*val, 7);
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_CALIBSCALE:
+ reg = AD5764_REG_FINE_GAIN(chan->address);
+ ret = ad5764_read(indio_dev, reg, val);
+ if (ret < 0)
+ return ret;
+ *val = sign_extend32(*val, 5);
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ /* vout = 4 * vref + ((dac_code / 65535) - 0.5) */
+ vref = ad5764_get_channel_vref(st, chan->channel);
+ if (vref < 0)
+ return vref;
+
+ scale_uv = (vref * 4 * 100) >> chan->scan_type.realbits;
+ *val = scale_uv / 100000;
+ *val2 = (scale_uv % 100000) * 10;
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_CHAN_INFO_OFFSET:
+ *val = -(1 << chan->scan_type.realbits) / 2;
+ return IIO_VAL_INT;
+ }
+
+ return -EINVAL;
+}
+
+static const struct iio_info ad5764_info = {
+ .read_raw = ad5764_read_raw,
+ .write_raw = ad5764_write_raw,
+ .driver_module = THIS_MODULE,
+};
+
+static int __devinit ad5764_probe(struct spi_device *spi)
+{
+ enum ad5764_type type = spi_get_device_id(spi)->driver_data;
+ struct iio_dev *indio_dev;
+ struct ad5764_state *st;
+ int ret;
+
+ indio_dev = iio_allocate_device(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->spi = spi;
+ st->chip_info = &ad5764_chip_infos[type];
+
+ indio_dev->dev.parent = &spi->dev;
+ indio_dev->name = spi_get_device_id(spi)->name;
+ indio_dev->info = &ad5764_info;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->num_channels = AD5764_NUM_CHANNELS;
+ indio_dev->channels = st->chip_info->channels;
+
+ if (st->chip_info->int_vref == 0) {
+ st->vref_reg[0].supply = "vrefAB";
+ st->vref_reg[1].supply = "vrefCD";
+
+ ret = regulator_bulk_get(&st->spi->dev,
+ ARRAY_SIZE(st->vref_reg), st->vref_reg);
+ if (ret) {
+ dev_err(&spi->dev, "Failed to request vref regulators: %d\n",
+ ret);
+ goto error_free;
+ }
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(st->vref_reg),
+ 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:
+ if (st->chip_info->int_vref == 0)
+ regulator_bulk_disable(ARRAY_SIZE(st->vref_reg), st->vref_reg);
+error_free_reg:
+ if (st->chip_info->int_vref == 0)
+ regulator_bulk_free(ARRAY_SIZE(st->vref_reg), st->vref_reg);
+error_free:
+ iio_free_device(indio_dev);
+
+ return ret;
+}
+
+static int __devexit ad5764_remove(struct spi_device *spi)
+{
+ struct iio_dev *indio_dev = spi_get_drvdata(spi);
+ struct ad5764_state *st = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+
+ if (st->chip_info->int_vref == 0) {
+ regulator_bulk_disable(ARRAY_SIZE(st->vref_reg), st->vref_reg);
+ regulator_bulk_free(ARRAY_SIZE(st->vref_reg), st->vref_reg);
+ }
+
+ iio_free_device(indio_dev);
+
+ return 0;
+}
+
+static const struct spi_device_id ad5764_ids[] = {
+ { "ad5744", ID_AD5744 },
+ { "ad5744r", ID_AD5744R },
+ { "ad5764", ID_AD5764 },
+ { "ad5764r", ID_AD5764R },
+ { }
+};
+MODULE_DEVICE_TABLE(spi, ad5764_ids);
+
+static struct spi_driver ad5764_driver = {
+ .driver = {
+ .name = "ad5764",
+ .owner = THIS_MODULE,
+ },
+ .probe = ad5764_probe,
+ .remove = __devexit_p(ad5764_remove),
+ .id_table = ad5764_ids,
+};
+
+static int __init ad5764_spi_init(void)
+{
+ return spi_register_driver(&ad5764_driver);
+}
+module_init(ad5764_spi_init);
+
+static void __exit ad5764_spi_exit(void)
+{
+ spi_unregister_driver(&ad5764_driver);
+}
+module_exit(ad5764_spi_exit);
+
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_DESCRIPTION("Analog Devices AD5744/AD5744R/AD5764/AD5764R DAC");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/iio/dac/ad5791.c b/drivers/staging/iio/dac/ad5791.c
index 6fbca8d96153..ac45636a8d72 100644
--- a/drivers/staging/iio/dac/ad5791.c
+++ b/drivers/staging/iio/dac/ad5791.c
@@ -1,5 +1,6 @@
/*
- * AD5760, AD5780, AD5781, AD5791 Voltage Output Digital to Analog Converter
+ * AD5760, AD5780, AD5781, AD5790, AD5791 Voltage Output Digital to Analog
+ * Converter
*
* Copyright 2011 Analog Devices Inc.
*
@@ -77,8 +78,8 @@ static int ad5791_spi_read(struct spi_device *spi, u8 addr, u32 *val)
.indexed = 1, \
.address = AD5791_ADDR_DAC0, \
.channel = 0, \
- .info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED) | \
- (1 << IIO_CHAN_INFO_OFFSET_SHARED), \
+ .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT | \
+ IIO_CHAN_INFO_OFFSET_SHARED_BIT, \
.scan_type = IIO_ST('u', bits, 24, shift) \
}
@@ -237,11 +238,11 @@ static int ad5791_read_raw(struct iio_dev *indio_dev,
*val &= AD5791_DAC_MASK;
*val >>= chan->scan_type.shift;
return IIO_VAL_INT;
- case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+ case IIO_CHAN_INFO_SCALE:
*val = 0;
*val2 = (((u64)st->vref_mv) * 1000000ULL) >> chan->scan_type.realbits;
return IIO_VAL_INT_PLUS_MICRO;
- case (1 << IIO_CHAN_INFO_OFFSET_SHARED):
+ case IIO_CHAN_INFO_OFFSET:
val64 = (((u64)st->vref_neg_mv) << chan->scan_type.realbits);
do_div(val64, st->vref_mv);
*val = -val64;
@@ -397,9 +398,11 @@ static const struct spi_device_id ad5791_id[] = {
{"ad5760", ID_AD5760},
{"ad5780", ID_AD5780},
{"ad5781", ID_AD5781},
+ {"ad5790", ID_AD5791},
{"ad5791", ID_AD5791},
{}
};
+MODULE_DEVICE_TABLE(spi, ad5791_id);
static struct spi_driver ad5791_driver = {
.driver = {
@@ -410,19 +413,8 @@ static struct spi_driver ad5791_driver = {
.remove = __devexit_p(ad5791_remove),
.id_table = ad5791_id,
};
-
-static __init int ad5791_spi_init(void)
-{
- return spi_register_driver(&ad5791_driver);
-}
-module_init(ad5791_spi_init);
-
-static __exit void ad5791_spi_exit(void)
-{
- spi_unregister_driver(&ad5791_driver);
-}
-module_exit(ad5791_spi_exit);
+module_spi_driver(ad5791_driver);
MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
-MODULE_DESCRIPTION("Analog Devices AD5760/AD5780/AD5781/AD5791 DAC");
+MODULE_DESCRIPTION("Analog Devices AD5760/AD5780/AD5781/AD5790/AD5791 DAC");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/iio/dac/max517.c b/drivers/staging/iio/dac/max517.c
index adfbd20f8988..a4df6d7443c1 100644
--- a/drivers/staging/iio/dac/max517.c
+++ b/drivers/staging/iio/dac/max517.c
@@ -280,20 +280,8 @@ static struct i2c_driver max517_driver = {
.resume = max517_resume,
.id_table = max517_id,
};
-
-static int __init max517_init(void)
-{
- return i2c_add_driver(&max517_driver);
-}
-
-static void __exit max517_exit(void)
-{
- i2c_del_driver(&max517_driver);
-}
+module_i2c_driver(max517_driver);
MODULE_AUTHOR("Roland Stigge <stigge@antcom.de>");
MODULE_DESCRIPTION("MAX517/MAX518/MAX519 8-bit DAC");
MODULE_LICENSE("GPL");
-
-module_init(max517_init);
-module_exit(max517_exit);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.