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path: root/drivers/staging/iio/adc/ad7606_core.c
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Diffstat (limited to 'drivers/staging/iio/adc/ad7606_core.c')
-rw-r--r--drivers/staging/iio/adc/ad7606_core.c300
1 files changed, 165 insertions, 135 deletions
diff --git a/drivers/staging/iio/adc/ad7606_core.c b/drivers/staging/iio/adc/ad7606_core.c
index 4c700f07fb83..459371ae4dcc 100644
--- a/drivers/staging/iio/adc/ad7606_core.c
+++ b/drivers/staging/iio/adc/ad7606_core.c
@@ -7,12 +7,10 @@
*/
#include <linux/interrupt.h>
-#include <linux/workqueue.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
-#include <linux/list.h>
#include <linux/regulator/consumer.h>
#include <linux/err.h>
#include <linux/gpio.h>
@@ -38,8 +36,9 @@ int ad7606_reset(struct ad7606_state *st)
return -ENODEV;
}
-static int ad7606_scan_direct(struct ad7606_state *st, unsigned ch)
+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;
@@ -78,67 +77,44 @@ error_ret:
return ret;
}
-static ssize_t ad7606_scan(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static int ad7606_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val,
+ int *val2,
+ long m)
{
- struct iio_dev *dev_info = dev_get_drvdata(dev);
- struct ad7606_state *st = dev_info->dev_data;
- struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
int ret;
-
- mutex_lock(&dev_info->mlock);
- if (iio_ring_enabled(dev_info))
- ret = ad7606_scan_from_ring(st, this_attr->address);
- else
- ret = ad7606_scan_direct(st, this_attr->address);
- mutex_unlock(&dev_info->mlock);
-
- if (ret < 0)
- return ret;
-
- return sprintf(buf, "%d\n", (short) ret);
-}
-
-static IIO_DEV_ATTR_IN_RAW(0, ad7606_scan, 0);
-static IIO_DEV_ATTR_IN_RAW(1, ad7606_scan, 1);
-static IIO_DEV_ATTR_IN_RAW(2, ad7606_scan, 2);
-static IIO_DEV_ATTR_IN_RAW(3, ad7606_scan, 3);
-static IIO_DEV_ATTR_IN_RAW(4, ad7606_scan, 4);
-static IIO_DEV_ATTR_IN_RAW(5, ad7606_scan, 5);
-static IIO_DEV_ATTR_IN_RAW(6, ad7606_scan, 6);
-static IIO_DEV_ATTR_IN_RAW(7, ad7606_scan, 7);
-
-static ssize_t ad7606_show_scale(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- /* Driver currently only support internal vref */
- struct iio_dev *dev_info = dev_get_drvdata(dev);
- struct ad7606_state *st = iio_dev_get_devdata(dev_info);
- unsigned int scale_uv = (st->range * 1000 * 2) >> st->chip_info->bits;
-
- return sprintf(buf, "%d.%03d\n", scale_uv / 1000, scale_uv % 1000);
-}
-static IIO_DEVICE_ATTR(in_scale, S_IRUGO, ad7606_show_scale, NULL, 0);
-
-static ssize_t ad7606_show_name(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct iio_dev *dev_info = dev_get_drvdata(dev);
- struct ad7606_state *st = iio_dev_get_devdata(dev_info);
-
- return sprintf(buf, "%s\n", st->chip_info->name);
+ struct ad7606_state *st = iio_priv(indio_dev);
+ unsigned int scale_uv;
+
+ switch (m) {
+ case 0:
+ mutex_lock(&indio_dev->mlock);
+ if (iio_ring_enabled(indio_dev))
+ ret = ad7606_scan_from_ring(indio_dev, chan->address);
+ 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 (1 << IIO_CHAN_INFO_SCALE_SHARED):
+ 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 IIO_DEVICE_ATTR(name, S_IRUGO, ad7606_show_name, NULL, 0);
-
static ssize_t ad7606_show_range(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct iio_dev *dev_info = dev_get_drvdata(dev);
- struct ad7606_state *st = iio_dev_get_devdata(dev_info);
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct ad7606_state *st = iio_priv(indio_dev);
return sprintf(buf, "%u\n", st->range);
}
@@ -146,8 +122,8 @@ static ssize_t ad7606_show_range(struct device *dev,
static ssize_t ad7606_store_range(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
- struct iio_dev *dev_info = dev_get_drvdata(dev);
- struct ad7606_state *st = iio_dev_get_devdata(dev_info);
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct ad7606_state *st = iio_priv(indio_dev);
unsigned long lval;
if (strict_strtoul(buf, 10, &lval))
@@ -156,10 +132,10 @@ static ssize_t ad7606_store_range(struct device *dev,
dev_err(dev, "range is not supported\n");
return -EINVAL;
}
- mutex_lock(&dev_info->mlock);
+ mutex_lock(&indio_dev->mlock);
gpio_set_value(st->pdata->gpio_range, lval == 10000);
st->range = lval;
- mutex_unlock(&dev_info->mlock);
+ mutex_unlock(&indio_dev->mlock);
return count;
}
@@ -171,8 +147,8 @@ static IIO_CONST_ATTR(range_available, "5000 10000");
static ssize_t ad7606_show_oversampling_ratio(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct iio_dev *dev_info = dev_get_drvdata(dev);
- struct ad7606_state *st = iio_dev_get_devdata(dev_info);
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct ad7606_state *st = iio_priv(indio_dev);
return sprintf(buf, "%u\n", st->oversampling);
}
@@ -192,8 +168,8 @@ static int ad7606_oversampling_get_index(unsigned val)
static ssize_t ad7606_store_oversampling_ratio(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
- struct iio_dev *dev_info = dev_get_drvdata(dev);
- struct ad7606_state *st = iio_dev_get_devdata(dev_info);
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct ad7606_state *st = iio_priv(indio_dev);
unsigned long lval;
int ret;
@@ -206,12 +182,12 @@ static ssize_t ad7606_store_oversampling_ratio(struct device *dev,
return ret;
}
- mutex_lock(&dev_info->mlock);
+ 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(&dev_info->mlock);
+ mutex_unlock(&indio_dev->mlock);
return count;
}
@@ -222,16 +198,6 @@ static IIO_DEVICE_ATTR(oversampling_ratio, S_IRUGO | S_IWUSR,
static IIO_CONST_ATTR(oversampling_ratio_available, "0 2 4 8 16 32 64");
static struct attribute *ad7606_attributes[] = {
- &iio_dev_attr_in0_raw.dev_attr.attr,
- &iio_dev_attr_in1_raw.dev_attr.attr,
- &iio_dev_attr_in2_raw.dev_attr.attr,
- &iio_dev_attr_in3_raw.dev_attr.attr,
- &iio_dev_attr_in4_raw.dev_attr.attr,
- &iio_dev_attr_in5_raw.dev_attr.attr,
- &iio_dev_attr_in6_raw.dev_attr.attr,
- &iio_dev_attr_in7_raw.dev_attr.attr,
- &iio_dev_attr_in_scale.dev_attr.attr,
- &iio_dev_attr_name.dev_attr.attr,
&iio_dev_attr_range.dev_attr.attr,
&iio_const_attr_range_available.dev_attr.attr,
&iio_dev_attr_oversampling_ratio.dev_attr.attr,
@@ -243,20 +209,12 @@ static mode_t ad7606_attr_is_visible(struct kobject *kobj,
struct attribute *attr, int n)
{
struct device *dev = container_of(kobj, struct device, kobj);
- struct iio_dev *dev_info = dev_get_drvdata(dev);
- struct ad7606_state *st = iio_dev_get_devdata(dev_info);
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct ad7606_state *st = iio_priv(indio_dev);
mode_t mode = attr->mode;
- if (st->chip_info->num_channels <= 6 &&
- (attr == &iio_dev_attr_in7_raw.dev_attr.attr ||
- attr == &iio_dev_attr_in6_raw.dev_attr.attr))
- mode = 0;
- else if (st->chip_info->num_channels <= 4 &&
- (attr == &iio_dev_attr_in5_raw.dev_attr.attr ||
- attr == &iio_dev_attr_in4_raw.dev_attr.attr))
- mode = 0;
- else if (!st->have_os &&
+ if (!st->have_os &&
(attr == &iio_dev_attr_oversampling_ratio.dev_attr.attr ||
attr ==
&iio_const_attr_oversampling_ratio_available.dev_attr.attr))
@@ -274,29 +232,92 @@ static const struct attribute_group ad7606_attribute_group = {
.is_visible = ad7606_attr_is_visible,
};
+static struct iio_chan_spec ad7606_8_channels[] = {
+ IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 0, 0, IIO_ST('s', 16, 16, 0), 0),
+ IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 1, 1, IIO_ST('s', 16, 16, 0), 0),
+ IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 2, 2, IIO_ST('s', 16, 16, 0), 0),
+ IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 3, 3, IIO_ST('s', 16, 16, 0), 0),
+ IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 4, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 4, 4, IIO_ST('s', 16, 16, 0), 0),
+ IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 5, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 5, 5, IIO_ST('s', 16, 16, 0), 0),
+ IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 6, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 6, 6, IIO_ST('s', 16, 16, 0), 0),
+ IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 7, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 7, 7, IIO_ST('s', 16, 16, 0), 0),
+ IIO_CHAN_SOFT_TIMESTAMP(8),
+};
+
+static struct iio_chan_spec ad7606_6_channels[] = {
+ IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 0, 0, IIO_ST('s', 16, 16, 0), 0),
+ IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 1, 1, IIO_ST('s', 16, 16, 0), 0),
+ IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 2, 2, IIO_ST('s', 16, 16, 0), 0),
+ IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 3, 3, IIO_ST('s', 16, 16, 0), 0),
+ IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 4, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 4, 4, IIO_ST('s', 16, 16, 0), 0),
+ IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 5, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 5, 5, IIO_ST('s', 16, 16, 0), 0),
+ IIO_CHAN_SOFT_TIMESTAMP(6),
+};
+
+static struct iio_chan_spec ad7606_4_channels[] = {
+ IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 0, 0, IIO_ST('s', 16, 16, 0), 0),
+ IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 1, 1, IIO_ST('s', 16, 16, 0), 0),
+ IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 2, 2, IIO_ST('s', 16, 16, 0), 0),
+ IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 3, 3, IIO_ST('s', 16, 16, 0), 0),
+ 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",
- .bits = 16,
- .sign = IIO_SCAN_EL_TYPE_SIGNED,
.int_vref_mv = 2500,
+ .channels = ad7606_8_channels,
.num_channels = 8,
},
[ID_AD7606_6] = {
.name = "ad7606-6",
- .bits = 16,
- .sign = IIO_SCAN_EL_TYPE_SIGNED,
.int_vref_mv = 2500,
+ .channels = ad7606_6_channels,
.num_channels = 6,
},
[ID_AD7606_4] = {
.name = "ad7606-4",
- .bits = 16,
- .sign = IIO_SCAN_EL_TYPE_SIGNED,
.int_vref_mv = 2500,
+ .channels = ad7606_4_channels,
.num_channels = 4,
},
};
@@ -343,8 +364,8 @@ static int ad7606_request_gpios(struct ad7606_state *st)
st->have_reset = true;
ret = gpio_request_one(st->pdata->gpio_range, GPIOF_DIR_OUT |
- ((st->range == 10000) ? GPIOF_INIT_HIGH :
- GPIOF_INIT_LOW), "AD7606_RANGE");
+ ((st->range == 10000) ? GPIOF_INIT_HIGH :
+ GPIOF_INIT_LOW), "AD7606_RANGE");
if (!ret)
st->have_range = true;
@@ -391,9 +412,10 @@ static void ad7606_free_gpios(struct ad7606_state *st)
*/
static irqreturn_t ad7606_interrupt(int irq, void *dev_id)
{
- struct ad7606_state *st = dev_id;
+ struct iio_dev *indio_dev = dev_id;
+ struct ad7606_state *st = iio_priv(indio_dev);
- if (iio_ring_enabled(st->indio_dev)) {
+ if (iio_ring_enabled(indio_dev)) {
if (!work_pending(&st->poll_work))
schedule_work(&st->poll_work);
} else {
@@ -404,21 +426,29 @@ static irqreturn_t ad7606_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
};
-struct ad7606_state *ad7606_probe(struct device *dev, int irq,
+static const struct iio_info ad7606_info = {
+ .driver_module = THIS_MODULE,
+ .read_raw = &ad7606_read_raw,
+ .attrs = &ad7606_attribute_group,
+};
+
+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;
+ int ret, regdone = 0;
+ struct iio_dev *indio_dev = iio_allocate_device(sizeof(*st));
- st = kzalloc(sizeof(*st), GFP_KERNEL);
- if (st == NULL) {
+ if (indio_dev == NULL) {
ret = -ENOMEM;
goto error_ret;
}
+ st = iio_priv(indio_dev);
+
st->dev = dev;
st->id = id;
st->irq = irq;
@@ -445,93 +475,91 @@ struct ad7606_state *ad7606_probe(struct device *dev, int irq,
st->pdata = pdata;
st->chip_info = &ad7606_chip_info_tbl[id];
- atomic_set(&st->protect_ring, 0);
-
- st->indio_dev = iio_allocate_device();
- if (st->indio_dev == NULL) {
- ret = -ENOMEM;
- goto error_disable_reg;
- }
-
- st->indio_dev->dev.parent = dev;
- st->indio_dev->attrs = &ad7606_attribute_group;
- st->indio_dev->dev_data = (void *)(st);
- st->indio_dev->driver_module = THIS_MODULE;
- st->indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->dev.parent = dev;
+ indio_dev->info = &ad7606_info;
+ 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_free_device;
+ 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(st->irq, ad7606_interrupt,
- IRQF_TRIGGER_FALLING, st->chip_info->name, st);
+ IRQF_TRIGGER_FALLING, st->chip_info->name, indio_dev);
if (ret)
goto error_free_gpios;
- ret = ad7606_register_ring_funcs_and_init(st->indio_dev);
+ ret = ad7606_register_ring_funcs_and_init(indio_dev);
if (ret)
goto error_free_irq;
- ret = iio_device_register(st->indio_dev);
+ ret = iio_device_register(indio_dev);
if (ret)
goto error_free_irq;
+ regdone = 1;
- ret = iio_ring_buffer_register(st->indio_dev->ring, 0);
+ ret = iio_ring_buffer_register_ex(indio_dev->ring, 0,
+ indio_dev->channels,
+ indio_dev->num_channels);
if (ret)
goto error_cleanup_ring;
- return st;
+ return indio_dev;
error_cleanup_ring:
- ad7606_ring_cleanup(st->indio_dev);
- iio_device_unregister(st->indio_dev);
+ ad7606_ring_cleanup(indio_dev);
error_free_irq:
- free_irq(st->irq, st);
+ free_irq(st->irq, indio_dev);
error_free_gpios:
ad7606_free_gpios(st);
-error_free_device:
- iio_free_device(st->indio_dev);
-
error_disable_reg:
if (!IS_ERR(st->reg))
regulator_disable(st->reg);
error_put_reg:
if (!IS_ERR(st->reg))
regulator_put(st->reg);
- kfree(st);
+ if (regdone)
+ iio_device_unregister(indio_dev);
+ else
+ iio_free_device(indio_dev);
error_ret:
return ERR_PTR(ret);
}
-int ad7606_remove(struct ad7606_state *st)
+int ad7606_remove(struct iio_dev *indio_dev)
{
- struct iio_dev *indio_dev = st->indio_dev;
+ struct ad7606_state *st = iio_priv(indio_dev);
+
iio_ring_buffer_unregister(indio_dev->ring);
ad7606_ring_cleanup(indio_dev);
- iio_device_unregister(indio_dev);
- free_irq(st->irq, st);
+
+ free_irq(st->irq, indio_dev);
if (!IS_ERR(st->reg)) {
regulator_disable(st->reg);
regulator_put(st->reg);
}
ad7606_free_gpios(st);
+ iio_device_unregister(indio_dev);
- kfree(st);
return 0;
}
-void ad7606_suspend(struct ad7606_state *st)
+void ad7606_suspend(struct iio_dev *indio_dev)
{
+ struct ad7606_state *st = iio_priv(indio_dev);
+
if (st->have_stby) {
if (st->have_range)
gpio_set_value(st->pdata->gpio_range, 1);
@@ -539,8 +567,10 @@ void ad7606_suspend(struct ad7606_state *st)
}
}
-void ad7606_resume(struct ad7606_state *st)
+void ad7606_resume(struct iio_dev *indio_dev)
{
+ struct ad7606_state *st = iio_priv(indio_dev);
+
if (st->have_stby) {
if (st->have_range)
gpio_set_value(st->pdata->gpio_range,
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.