This driver predates the availability of IIO_CHAN_INFO_OVERSAMPLING_RATIO
attribute wherein usage has some advantages like it can be accessed by
in-kernel consumers as well as reduces the code size.
Therefore, use IIO_CHAN_INFO_OVERSAMPLING_RATIO to implement the
oversampling_ratio attribute instead of using IIO_DEVICE_ATTR() macro.
Move code from the functions associated with IIO_DEVICE_ATTR() into
the read_raw hook as well as add the write_raw hook with both masks set
to IIO_CHAN_INFO_OVERSAMPLING_RATIO.
Signed-off-by: Eva Rachel Retuya <eraretuya@xxxxxxxxx>
Acked-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
---
Changes in v2:
* Add Lar's Acked-by tag
* Update dev_err() to use proper arguments
drivers/staging/iio/adc/ad7606_core.c | 67 ++++++++++++++++-------------------
1 file changed, 31 insertions(+), 36 deletions(-)
diff --git a/drivers/staging/iio/adc/ad7606_core.c b/drivers/staging/iio/adc/ad7606_core.c
index f79ee61..437c7d0 100644
--- a/drivers/staging/iio/adc/ad7606_core.c
+++ b/drivers/staging/iio/adc/ad7606_core.c
@@ -103,6 +103,9 @@ static int ad7606_read_raw(struct iio_dev *indio_dev,
*val = st->range * 2;
*val2 = st->chip_info->channels[0].scan_type.realbits;
return IIO_VAL_FRACTIONAL_LOG2;
+ case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
+ *val = st->oversampling;
+ return IIO_VAL_INT;
}
return -EINVAL;
}
@@ -145,16 +148,6 @@ 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 int val)
{
unsigned char supported[] = {0, 2, 4, 8, 16, 32, 64};
@@ -167,44 +160,43 @@ static int ad7606_oversampling_get_index(unsigned int val)
return -EINVAL;
}
-static ssize_t ad7606_store_oversampling_ratio(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
+static int ad7606_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_to_iio_dev(dev);
struct ad7606_state *st = iio_priv(indio_dev);
- unsigned long lval;
int ret;
- ret = kstrtoul(buf, 10, &lval);
- if (ret)
- return ret;
+ switch (mask) {
+ case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
+ if (val2)
+ return -EINVAL;
+ ret = ad7606_oversampling_get_index(val);
+ if (ret < 0) {
+ dev_err(st->dev, "oversampling %d is not supported\n",
+ val);
+ return ret;
+ }
- 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 = val;
+ mutex_unlock(&indio_dev->mlock);
+ return 0;
+ default:
+ return -EINVAL;
}
-
- 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,
};
@@ -214,7 +206,6 @@ static const struct attribute_group ad7606_attribute_group_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,
};
@@ -241,6 +232,8 @@ static const struct attribute_group ad7606_attribute_group_range = {
.address = num, \
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),\
+ .info_mask_shared_by_all = \
+ BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), \
.scan_index = num, \
.scan_type = { \
.sign = 's', \
@@ -429,12 +422,14 @@ static const struct iio_info ad7606_info_no_os_or_range = {
static const struct iio_info ad7606_info_os_and_range = {
.driver_module = THIS_MODULE,
.read_raw = &ad7606_read_raw,
+ .write_raw = &ad7606_write_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,
+ .write_raw = &ad7606_write_raw,
.attrs = &ad7606_attribute_group_os,
};
--
2.7.4
--
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