From: Michael Hennerich <michael.hennerich@xxxxxxxxxx>
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@xxxxxxxxxx>
---
drivers/staging/iio/iio.h | 1 +
drivers/staging/iio/industrialio-core.c | 4 +++-
2 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/drivers/staging/iio/iio.h b/drivers/staging/iio/iio.h
index 9ca89c7..7a6ce4d 100644
--- a/drivers/staging/iio/iio.h
+++ b/drivers/staging/iio/iio.h
@@ -30,6 +30,7 @@
enum iio_chan_type {
/* real channel types */
IIO_IN,
+ IIO_OUT,
IIO_CURRENT,
IIO_POWER,
IIO_ACCEL,
diff --git a/drivers/staging/iio/industrialio-core.c b/drivers/staging/iio/industrialio-core.c
index 744153e..8fa2be6 100644
--- a/drivers/staging/iio/industrialio-core.c
+++ b/drivers/staging/iio/industrialio-core.c
@@ -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,
--
1.7.0.4
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