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iio: Factor IIO value formating into its own function

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Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Lars-Peter Clausen 2013-10-07 15:11:00 +01:00 committed by Jonathan Cameron
parent 11cb454f09
commit 3661f3f5e9
2 changed files with 28 additions and 12 deletions
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2
drivers/iio/iio_core.h
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@ -35,6 +35,8 @@ int __iio_add_chan_devattr(const char *postfix,
struct list_head *attr_list);
void iio_free_chan_devattr_list(struct list_head *attr_list);
ssize_t iio_format_value(char *buf, unsigned int type, int val, int val2);
/* Event interface flags */
#define IIO_BUSY_BIT_POS 1

38
drivers/iio/industrialio-core.c
View file

@ -363,22 +363,20 @@ ssize_t iio_enum_write(struct iio_dev *indio_dev,
}
EXPORT_SYMBOL_GPL(iio_enum_write);
static ssize_t iio_read_channel_info(struct device *dev,
struct device_attribute *attr,
char *buf)
/**
* iio_format_value() - Formats a IIO value into its string representation
* @buf: The buffer to which the formated value gets written
* @type: One of the IIO_VAL_... constants. This decides how the val and val2
* parameters are formatted.
* @val: First part of the value, exact meaning depends on the type parameter.
* @val2: Second part of the value, exact meaning depends on the type parameter.
*/
ssize_t iio_format_value(char *buf, unsigned int type, int val, int val2)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
unsigned long long tmp;
int val, val2;
bool scale_db = false;
int ret = indio_dev->info->read_raw(indio_dev, this_attr->c,
&val, &val2, this_attr->address);
if (ret < 0)
return ret;
switch (ret) {
switch (type) {
case IIO_VAL_INT:
return sprintf(buf, "%d\n", val);
case IIO_VAL_INT_PLUS_MICRO_DB:
@ -410,6 +408,22 @@ static ssize_t iio_read_channel_info(struct device *dev,
}
}
static ssize_t iio_read_channel_info(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
int val, val2;
int ret = indio_dev->info->read_raw(indio_dev, this_attr->c,
&val, &val2, this_attr->address);
if (ret < 0)
return ret;
return iio_format_value(buf, ret, val, val2);
}
/**
* iio_str_to_fixpoint() - Parse a fixed-point number from a string
* @str: The string to parse