Add three new macros: IIO_DEVICE_ATTR_RO, IIO_DEVICE_ATTR_WO and
IIO_DEVICE_ATTR_RW to reduce the amount of boiler plate code that
is needed for creating new attributes. This mimics the *_RO, *_WO,
and *_RW macros that are found in include/linux/device.h and
include/linux/sysfs.h.

Signed-off-by: Brian Masney <masn...@onstation.org>
---
 include/linux/iio/sysfs.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/include/linux/iio/sysfs.h b/include/linux/iio/sysfs.h
index 9cd8f74..f7c6431 100644
--- a/include/linux/iio/sysfs.h
+++ b/include/linux/iio/sysfs.h
@@ -59,6 +59,19 @@ struct iio_const_attr {
        struct iio_dev_attr iio_dev_attr_##_name                \
        = IIO_ATTR(_name, _mode, _show, _store, _addr)
 
+#define IIO_DEVICE_ATTR_RO(_name, _addr)                       \
+       struct iio_dev_attr iio_dev_attr_##_name                \
+       = IIO_ATTR(_name, S_IRUGO, _name##_show, NULL, _addr)
+
+#define IIO_DEVICE_ATTR_WO(_name, _addr)                       \
+       struct iio_dev_attr iio_dev_attr_##_name                \
+       = IIO_ATTR(_name, S_IWUSR, NULL, _name##_store, _addr)
+
+#define IIO_DEVICE_ATTR_RW(_name, _addr)                                   \
+       struct iio_dev_attr iio_dev_attr_##_name                            \
+       = IIO_ATTR(_name, (S_IWUSR | S_IRUGO), _name##_show, _name##_store, \
+                  _addr)
+
 #define IIO_DEVICE_ATTR_NAMED(_vname, _name, _mode, _show, _store, _addr) \
        struct iio_dev_attr iio_dev_attr_##_vname                       \
        = IIO_ATTR(_name, _mode, _show, _store, _addr)
-- 
2.7.4

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