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iio: industrialio-core: Add IIO_OUT type 

Add IIO_OUT type for DAC like devices
In case of IIO_OUT make sure the channel device attribute is writable

Ideally we add a flag to iio_chan_spec that tells the core that
the channel device attribute is writable...

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Michael Hennerich 2011-06-10 15:40:48 +02:00 committed by Greg Kroah-Hartman
parent 88bc30548a
commit ae19178eac
2 changed files with 4 additions and 1 deletions
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1
drivers/staging/iio/iio.h
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@ -30,6 +30,7 @@
enum iio_chan_type {
/* real channel types */
IIO_IN,
IIO_OUT,
IIO_CURRENT,
IIO_POWER,
IIO_ACCEL,

4
drivers/staging/iio/industrialio-core.c
View File

@ -47,6 +47,7 @@ static const char * const iio_chan_type_name_spec_shared[] = {
[IIO_TIMESTAMP] = "timestamp",
[IIO_ACCEL] = "accel",
[IIO_IN] = "in",
[IIO_OUT] = "out",
[IIO_CURRENT] = "current",
[IIO_POWER] = "power",
[IIO_IN_DIFF] = "in-in",
@ -675,7 +676,8 @@ static int iio_device_add_channel_sysfs(struct iio_dev *dev_info,
else
ret = __iio_add_chan_devattr("raw", NULL, chan,
&iio_read_channel_info,
NULL,
(chan->type == IIO_OUT ?
&iio_write_channel_info : NULL),
0,
0,
&dev_info->dev,