![Lars-Peter Clausen](/assets/img/avatar_default.png)
The per driver iio_chan_spec arrays are usually shared between multiple device instances. So a single device instance may not modify the iio_chan_spec array since this would also affect the other device instances. To make this restriction explicit mark the per driver iio_chan_spec arrays as const. Conversion was done automatically using the following coccinelle semantic patch: // <smpl> @disable optional_qualifier@ identifier channels; @@ static +const struct iio_chan_spec channels[] = ...; // </smpl> Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
608 lines
15 KiB
C
608 lines
15 KiB
C
/*
|
|
* AD7606 SPI ADC driver
|
|
*
|
|
* Copyright 2011 Analog Devices Inc.
|
|
*
|
|
* Licensed under the GPL-2.
|
|
*/
|
|
|
|
#include <linux/interrupt.h>
|
|
#include <linux/device.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/sysfs.h>
|
|
#include <linux/regulator/consumer.h>
|
|
#include <linux/err.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/iio/iio.h>
|
|
#include <linux/iio/sysfs.h>
|
|
#include <linux/iio/buffer.h>
|
|
|
|
#include "ad7606.h"
|
|
|
|
int ad7606_reset(struct ad7606_state *st)
|
|
{
|
|
if (gpio_is_valid(st->pdata->gpio_reset)) {
|
|
gpio_set_value(st->pdata->gpio_reset, 1);
|
|
ndelay(100); /* t_reset >= 100ns */
|
|
gpio_set_value(st->pdata->gpio_reset, 0);
|
|
return 0;
|
|
}
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
static int ad7606_scan_direct(struct iio_dev *indio_dev, unsigned ch)
|
|
{
|
|
struct ad7606_state *st = iio_priv(indio_dev);
|
|
int ret;
|
|
|
|
st->done = false;
|
|
gpio_set_value(st->pdata->gpio_convst, 1);
|
|
|
|
ret = wait_event_interruptible(st->wq_data_avail, st->done);
|
|
if (ret)
|
|
goto error_ret;
|
|
|
|
if (gpio_is_valid(st->pdata->gpio_frstdata)) {
|
|
ret = st->bops->read_block(st->dev, 1, st->data);
|
|
if (ret)
|
|
goto error_ret;
|
|
if (!gpio_get_value(st->pdata->gpio_frstdata)) {
|
|
/* This should never happen */
|
|
ad7606_reset(st);
|
|
ret = -EIO;
|
|
goto error_ret;
|
|
}
|
|
ret = st->bops->read_block(st->dev,
|
|
st->chip_info->num_channels - 1, &st->data[1]);
|
|
if (ret)
|
|
goto error_ret;
|
|
} else {
|
|
ret = st->bops->read_block(st->dev,
|
|
st->chip_info->num_channels, st->data);
|
|
if (ret)
|
|
goto error_ret;
|
|
}
|
|
|
|
ret = st->data[ch];
|
|
|
|
error_ret:
|
|
gpio_set_value(st->pdata->gpio_convst, 0);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ad7606_read_raw(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan,
|
|
int *val,
|
|
int *val2,
|
|
long m)
|
|
{
|
|
int ret;
|
|
struct ad7606_state *st = iio_priv(indio_dev);
|
|
unsigned int scale_uv;
|
|
|
|
switch (m) {
|
|
case IIO_CHAN_INFO_RAW:
|
|
mutex_lock(&indio_dev->mlock);
|
|
if (iio_buffer_enabled(indio_dev))
|
|
ret = -EBUSY;
|
|
else
|
|
ret = ad7606_scan_direct(indio_dev, chan->address);
|
|
mutex_unlock(&indio_dev->mlock);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
*val = (short) ret;
|
|
return IIO_VAL_INT;
|
|
case IIO_CHAN_INFO_SCALE:
|
|
scale_uv = (st->range * 1000 * 2)
|
|
>> st->chip_info->channels[0].scan_type.realbits;
|
|
*val = scale_uv / 1000;
|
|
*val2 = (scale_uv % 1000) * 1000;
|
|
return IIO_VAL_INT_PLUS_MICRO;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
static ssize_t ad7606_show_range(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
|
|
struct ad7606_state *st = iio_priv(indio_dev);
|
|
|
|
return sprintf(buf, "%u\n", st->range);
|
|
}
|
|
|
|
static ssize_t ad7606_store_range(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t count)
|
|
{
|
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
|
|
struct ad7606_state *st = iio_priv(indio_dev);
|
|
unsigned long lval;
|
|
|
|
if (strict_strtoul(buf, 10, &lval))
|
|
return -EINVAL;
|
|
if (!(lval == 5000 || lval == 10000)) {
|
|
dev_err(dev, "range is not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
mutex_lock(&indio_dev->mlock);
|
|
gpio_set_value(st->pdata->gpio_range, lval == 10000);
|
|
st->range = lval;
|
|
mutex_unlock(&indio_dev->mlock);
|
|
|
|
return count;
|
|
}
|
|
|
|
static IIO_DEVICE_ATTR(in_voltage_range, S_IRUGO | S_IWUSR, \
|
|
ad7606_show_range, ad7606_store_range, 0);
|
|
static IIO_CONST_ATTR(in_voltage_range_available, "5000 10000");
|
|
|
|
static ssize_t ad7606_show_oversampling_ratio(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
|
|
struct ad7606_state *st = iio_priv(indio_dev);
|
|
|
|
return sprintf(buf, "%u\n", st->oversampling);
|
|
}
|
|
|
|
static int ad7606_oversampling_get_index(unsigned val)
|
|
{
|
|
unsigned char supported[] = {0, 2, 4, 8, 16, 32, 64};
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(supported); i++)
|
|
if (val == supported[i])
|
|
return i;
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static ssize_t ad7606_store_oversampling_ratio(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t count)
|
|
{
|
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
|
|
struct ad7606_state *st = iio_priv(indio_dev);
|
|
unsigned long lval;
|
|
int ret;
|
|
|
|
if (strict_strtoul(buf, 10, &lval))
|
|
return -EINVAL;
|
|
|
|
ret = ad7606_oversampling_get_index(lval);
|
|
if (ret < 0) {
|
|
dev_err(dev, "oversampling %lu is not supported\n", lval);
|
|
return ret;
|
|
}
|
|
|
|
mutex_lock(&indio_dev->mlock);
|
|
gpio_set_value(st->pdata->gpio_os0, (ret >> 0) & 1);
|
|
gpio_set_value(st->pdata->gpio_os1, (ret >> 1) & 1);
|
|
gpio_set_value(st->pdata->gpio_os1, (ret >> 2) & 1);
|
|
st->oversampling = lval;
|
|
mutex_unlock(&indio_dev->mlock);
|
|
|
|
return count;
|
|
}
|
|
|
|
static IIO_DEVICE_ATTR(oversampling_ratio, S_IRUGO | S_IWUSR,
|
|
ad7606_show_oversampling_ratio,
|
|
ad7606_store_oversampling_ratio, 0);
|
|
static IIO_CONST_ATTR(oversampling_ratio_available, "0 2 4 8 16 32 64");
|
|
|
|
static struct attribute *ad7606_attributes_os_and_range[] = {
|
|
&iio_dev_attr_in_voltage_range.dev_attr.attr,
|
|
&iio_const_attr_in_voltage_range_available.dev_attr.attr,
|
|
&iio_dev_attr_oversampling_ratio.dev_attr.attr,
|
|
&iio_const_attr_oversampling_ratio_available.dev_attr.attr,
|
|
NULL,
|
|
};
|
|
|
|
static const struct attribute_group ad7606_attribute_group_os_and_range = {
|
|
.attrs = ad7606_attributes_os_and_range,
|
|
};
|
|
|
|
static struct attribute *ad7606_attributes_os[] = {
|
|
&iio_dev_attr_oversampling_ratio.dev_attr.attr,
|
|
&iio_const_attr_oversampling_ratio_available.dev_attr.attr,
|
|
NULL,
|
|
};
|
|
|
|
static const struct attribute_group ad7606_attribute_group_os = {
|
|
.attrs = ad7606_attributes_os,
|
|
};
|
|
|
|
static struct attribute *ad7606_attributes_range[] = {
|
|
&iio_dev_attr_in_voltage_range.dev_attr.attr,
|
|
&iio_const_attr_in_voltage_range_available.dev_attr.attr,
|
|
NULL,
|
|
};
|
|
|
|
static const struct attribute_group ad7606_attribute_group_range = {
|
|
.attrs = ad7606_attributes_range,
|
|
};
|
|
|
|
#define AD7606_CHANNEL(num) \
|
|
{ \
|
|
.type = IIO_VOLTAGE, \
|
|
.indexed = 1, \
|
|
.channel = num, \
|
|
.address = num, \
|
|
.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \
|
|
IIO_CHAN_INFO_SCALE_SHARED_BIT, \
|
|
.scan_index = num, \
|
|
.scan_type = IIO_ST('s', 16, 16, 0), \
|
|
}
|
|
|
|
static const struct iio_chan_spec ad7606_8_channels[] = {
|
|
AD7606_CHANNEL(0),
|
|
AD7606_CHANNEL(1),
|
|
AD7606_CHANNEL(2),
|
|
AD7606_CHANNEL(3),
|
|
AD7606_CHANNEL(4),
|
|
AD7606_CHANNEL(5),
|
|
AD7606_CHANNEL(6),
|
|
AD7606_CHANNEL(7),
|
|
IIO_CHAN_SOFT_TIMESTAMP(8),
|
|
};
|
|
|
|
static const struct iio_chan_spec ad7606_6_channels[] = {
|
|
AD7606_CHANNEL(0),
|
|
AD7606_CHANNEL(1),
|
|
AD7606_CHANNEL(2),
|
|
AD7606_CHANNEL(3),
|
|
AD7606_CHANNEL(4),
|
|
AD7606_CHANNEL(5),
|
|
IIO_CHAN_SOFT_TIMESTAMP(6),
|
|
};
|
|
|
|
static const struct iio_chan_spec ad7606_4_channels[] = {
|
|
AD7606_CHANNEL(0),
|
|
AD7606_CHANNEL(1),
|
|
AD7606_CHANNEL(2),
|
|
AD7606_CHANNEL(3),
|
|
IIO_CHAN_SOFT_TIMESTAMP(4),
|
|
};
|
|
|
|
static const struct ad7606_chip_info ad7606_chip_info_tbl[] = {
|
|
/*
|
|
* More devices added in future
|
|
*/
|
|
[ID_AD7606_8] = {
|
|
.name = "ad7606",
|
|
.int_vref_mv = 2500,
|
|
.channels = ad7606_8_channels,
|
|
.num_channels = 8,
|
|
},
|
|
[ID_AD7606_6] = {
|
|
.name = "ad7606-6",
|
|
.int_vref_mv = 2500,
|
|
.channels = ad7606_6_channels,
|
|
.num_channels = 6,
|
|
},
|
|
[ID_AD7606_4] = {
|
|
.name = "ad7606-4",
|
|
.int_vref_mv = 2500,
|
|
.channels = ad7606_4_channels,
|
|
.num_channels = 4,
|
|
},
|
|
};
|
|
|
|
static int ad7606_request_gpios(struct ad7606_state *st)
|
|
{
|
|
struct gpio gpio_array[3] = {
|
|
[0] = {
|
|
.gpio = st->pdata->gpio_os0,
|
|
.flags = GPIOF_DIR_OUT | ((st->oversampling & 1) ?
|
|
GPIOF_INIT_HIGH : GPIOF_INIT_LOW),
|
|
.label = "AD7606_OS0",
|
|
},
|
|
[1] = {
|
|
.gpio = st->pdata->gpio_os1,
|
|
.flags = GPIOF_DIR_OUT | ((st->oversampling & 2) ?
|
|
GPIOF_INIT_HIGH : GPIOF_INIT_LOW),
|
|
.label = "AD7606_OS1",
|
|
},
|
|
[2] = {
|
|
.gpio = st->pdata->gpio_os2,
|
|
.flags = GPIOF_DIR_OUT | ((st->oversampling & 4) ?
|
|
GPIOF_INIT_HIGH : GPIOF_INIT_LOW),
|
|
.label = "AD7606_OS2",
|
|
},
|
|
};
|
|
int ret;
|
|
|
|
if (gpio_is_valid(st->pdata->gpio_convst)) {
|
|
ret = gpio_request_one(st->pdata->gpio_convst,
|
|
GPIOF_OUT_INIT_LOW,
|
|
"AD7606_CONVST");
|
|
if (ret) {
|
|
dev_err(st->dev, "failed to request GPIO CONVST\n");
|
|
goto error_ret;
|
|
}
|
|
} else {
|
|
ret = -EIO;
|
|
goto error_ret;
|
|
}
|
|
|
|
if (gpio_is_valid(st->pdata->gpio_os0) &&
|
|
gpio_is_valid(st->pdata->gpio_os1) &&
|
|
gpio_is_valid(st->pdata->gpio_os2)) {
|
|
ret = gpio_request_array(gpio_array, ARRAY_SIZE(gpio_array));
|
|
if (ret < 0)
|
|
goto error_free_convst;
|
|
}
|
|
|
|
if (gpio_is_valid(st->pdata->gpio_reset)) {
|
|
ret = gpio_request_one(st->pdata->gpio_reset,
|
|
GPIOF_OUT_INIT_LOW,
|
|
"AD7606_RESET");
|
|
if (ret < 0)
|
|
goto error_free_os;
|
|
}
|
|
|
|
if (gpio_is_valid(st->pdata->gpio_range)) {
|
|
ret = gpio_request_one(st->pdata->gpio_range, GPIOF_DIR_OUT |
|
|
((st->range == 10000) ? GPIOF_INIT_HIGH :
|
|
GPIOF_INIT_LOW), "AD7606_RANGE");
|
|
if (ret < 0)
|
|
goto error_free_reset;
|
|
}
|
|
if (gpio_is_valid(st->pdata->gpio_stby)) {
|
|
ret = gpio_request_one(st->pdata->gpio_stby,
|
|
GPIOF_OUT_INIT_HIGH,
|
|
"AD7606_STBY");
|
|
if (ret < 0)
|
|
goto error_free_range;
|
|
}
|
|
|
|
if (gpio_is_valid(st->pdata->gpio_frstdata)) {
|
|
ret = gpio_request_one(st->pdata->gpio_frstdata, GPIOF_IN,
|
|
"AD7606_FRSTDATA");
|
|
if (ret < 0)
|
|
goto error_free_stby;
|
|
}
|
|
|
|
return 0;
|
|
|
|
error_free_stby:
|
|
if (gpio_is_valid(st->pdata->gpio_stby))
|
|
gpio_free(st->pdata->gpio_stby);
|
|
error_free_range:
|
|
if (gpio_is_valid(st->pdata->gpio_range))
|
|
gpio_free(st->pdata->gpio_range);
|
|
error_free_reset:
|
|
if (gpio_is_valid(st->pdata->gpio_reset))
|
|
gpio_free(st->pdata->gpio_reset);
|
|
error_free_os:
|
|
if (gpio_is_valid(st->pdata->gpio_os0) &&
|
|
gpio_is_valid(st->pdata->gpio_os1) &&
|
|
gpio_is_valid(st->pdata->gpio_os2))
|
|
gpio_free_array(gpio_array, ARRAY_SIZE(gpio_array));
|
|
error_free_convst:
|
|
gpio_free(st->pdata->gpio_convst);
|
|
error_ret:
|
|
return ret;
|
|
}
|
|
|
|
static void ad7606_free_gpios(struct ad7606_state *st)
|
|
{
|
|
if (gpio_is_valid(st->pdata->gpio_frstdata))
|
|
gpio_free(st->pdata->gpio_frstdata);
|
|
if (gpio_is_valid(st->pdata->gpio_stby))
|
|
gpio_free(st->pdata->gpio_stby);
|
|
if (gpio_is_valid(st->pdata->gpio_range))
|
|
gpio_free(st->pdata->gpio_range);
|
|
if (gpio_is_valid(st->pdata->gpio_reset))
|
|
gpio_free(st->pdata->gpio_reset);
|
|
if (gpio_is_valid(st->pdata->gpio_os0) &&
|
|
gpio_is_valid(st->pdata->gpio_os1) &&
|
|
gpio_is_valid(st->pdata->gpio_os2)) {
|
|
gpio_free(st->pdata->gpio_os2);
|
|
gpio_free(st->pdata->gpio_os1);
|
|
gpio_free(st->pdata->gpio_os0);
|
|
}
|
|
gpio_free(st->pdata->gpio_convst);
|
|
}
|
|
|
|
/**
|
|
* Interrupt handler
|
|
*/
|
|
static irqreturn_t ad7606_interrupt(int irq, void *dev_id)
|
|
{
|
|
struct iio_dev *indio_dev = dev_id;
|
|
struct ad7606_state *st = iio_priv(indio_dev);
|
|
|
|
if (iio_buffer_enabled(indio_dev)) {
|
|
if (!work_pending(&st->poll_work))
|
|
schedule_work(&st->poll_work);
|
|
} else {
|
|
st->done = true;
|
|
wake_up_interruptible(&st->wq_data_avail);
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
};
|
|
|
|
static const struct iio_info ad7606_info_no_os_or_range = {
|
|
.driver_module = THIS_MODULE,
|
|
.read_raw = &ad7606_read_raw,
|
|
};
|
|
|
|
static const struct iio_info ad7606_info_os_and_range = {
|
|
.driver_module = THIS_MODULE,
|
|
.read_raw = &ad7606_read_raw,
|
|
.attrs = &ad7606_attribute_group_os_and_range,
|
|
};
|
|
|
|
static const struct iio_info ad7606_info_os = {
|
|
.driver_module = THIS_MODULE,
|
|
.read_raw = &ad7606_read_raw,
|
|
.attrs = &ad7606_attribute_group_os,
|
|
};
|
|
|
|
static const struct iio_info ad7606_info_range = {
|
|
.driver_module = THIS_MODULE,
|
|
.read_raw = &ad7606_read_raw,
|
|
.attrs = &ad7606_attribute_group_range,
|
|
};
|
|
|
|
struct iio_dev *ad7606_probe(struct device *dev, int irq,
|
|
void __iomem *base_address,
|
|
unsigned id,
|
|
const struct ad7606_bus_ops *bops)
|
|
{
|
|
struct ad7606_platform_data *pdata = dev->platform_data;
|
|
struct ad7606_state *st;
|
|
int ret;
|
|
struct iio_dev *indio_dev = iio_device_alloc(sizeof(*st));
|
|
|
|
if (indio_dev == NULL) {
|
|
ret = -ENOMEM;
|
|
goto error_ret;
|
|
}
|
|
|
|
st = iio_priv(indio_dev);
|
|
|
|
st->dev = dev;
|
|
st->bops = bops;
|
|
st->base_address = base_address;
|
|
st->range = pdata->default_range == 10000 ? 10000 : 5000;
|
|
|
|
ret = ad7606_oversampling_get_index(pdata->default_os);
|
|
if (ret < 0) {
|
|
dev_warn(dev, "oversampling %d is not supported\n",
|
|
pdata->default_os);
|
|
st->oversampling = 0;
|
|
} else {
|
|
st->oversampling = pdata->default_os;
|
|
}
|
|
|
|
st->reg = regulator_get(dev, "vcc");
|
|
if (!IS_ERR(st->reg)) {
|
|
ret = regulator_enable(st->reg);
|
|
if (ret)
|
|
goto error_put_reg;
|
|
}
|
|
|
|
st->pdata = pdata;
|
|
st->chip_info = &ad7606_chip_info_tbl[id];
|
|
|
|
indio_dev->dev.parent = dev;
|
|
if (gpio_is_valid(st->pdata->gpio_os0) &&
|
|
gpio_is_valid(st->pdata->gpio_os1) &&
|
|
gpio_is_valid(st->pdata->gpio_os2)) {
|
|
if (gpio_is_valid(st->pdata->gpio_range))
|
|
indio_dev->info = &ad7606_info_os_and_range;
|
|
else
|
|
indio_dev->info = &ad7606_info_os;
|
|
} else {
|
|
if (gpio_is_valid(st->pdata->gpio_range))
|
|
indio_dev->info = &ad7606_info_range;
|
|
else
|
|
indio_dev->info = &ad7606_info_no_os_or_range;
|
|
}
|
|
indio_dev->modes = INDIO_DIRECT_MODE;
|
|
indio_dev->name = st->chip_info->name;
|
|
indio_dev->channels = st->chip_info->channels;
|
|
indio_dev->num_channels = st->chip_info->num_channels;
|
|
|
|
init_waitqueue_head(&st->wq_data_avail);
|
|
|
|
ret = ad7606_request_gpios(st);
|
|
if (ret)
|
|
goto error_disable_reg;
|
|
|
|
ret = ad7606_reset(st);
|
|
if (ret)
|
|
dev_warn(st->dev, "failed to RESET: no RESET GPIO specified\n");
|
|
|
|
ret = request_irq(irq, ad7606_interrupt,
|
|
IRQF_TRIGGER_FALLING, st->chip_info->name, indio_dev);
|
|
if (ret)
|
|
goto error_free_gpios;
|
|
|
|
ret = ad7606_register_ring_funcs_and_init(indio_dev);
|
|
if (ret)
|
|
goto error_free_irq;
|
|
|
|
ret = iio_device_register(indio_dev);
|
|
if (ret)
|
|
goto error_unregister_ring;
|
|
|
|
return indio_dev;
|
|
error_unregister_ring:
|
|
ad7606_ring_cleanup(indio_dev);
|
|
|
|
error_free_irq:
|
|
free_irq(irq, indio_dev);
|
|
|
|
error_free_gpios:
|
|
ad7606_free_gpios(st);
|
|
|
|
error_disable_reg:
|
|
if (!IS_ERR(st->reg))
|
|
regulator_disable(st->reg);
|
|
error_put_reg:
|
|
if (!IS_ERR(st->reg))
|
|
regulator_put(st->reg);
|
|
iio_device_free(indio_dev);
|
|
error_ret:
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
int ad7606_remove(struct iio_dev *indio_dev, int irq)
|
|
{
|
|
struct ad7606_state *st = iio_priv(indio_dev);
|
|
|
|
iio_device_unregister(indio_dev);
|
|
ad7606_ring_cleanup(indio_dev);
|
|
|
|
free_irq(irq, indio_dev);
|
|
if (!IS_ERR(st->reg)) {
|
|
regulator_disable(st->reg);
|
|
regulator_put(st->reg);
|
|
}
|
|
|
|
ad7606_free_gpios(st);
|
|
iio_device_free(indio_dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void ad7606_suspend(struct iio_dev *indio_dev)
|
|
{
|
|
struct ad7606_state *st = iio_priv(indio_dev);
|
|
|
|
if (gpio_is_valid(st->pdata->gpio_stby)) {
|
|
if (gpio_is_valid(st->pdata->gpio_range))
|
|
gpio_set_value(st->pdata->gpio_range, 1);
|
|
gpio_set_value(st->pdata->gpio_stby, 0);
|
|
}
|
|
}
|
|
|
|
void ad7606_resume(struct iio_dev *indio_dev)
|
|
{
|
|
struct ad7606_state *st = iio_priv(indio_dev);
|
|
|
|
if (gpio_is_valid(st->pdata->gpio_stby)) {
|
|
if (gpio_is_valid(st->pdata->gpio_range))
|
|
gpio_set_value(st->pdata->gpio_range,
|
|
st->range == 10000);
|
|
|
|
gpio_set_value(st->pdata->gpio_stby, 1);
|
|
ad7606_reset(st);
|
|
}
|
|
}
|
|
|
|
MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
|
|
MODULE_DESCRIPTION("Analog Devices AD7606 ADC");
|
|
MODULE_LICENSE("GPL v2");
|