@@ -97,6 +97,17 @@ struct iio_const_attr {
= { .string = _string, \
.dev_attr = __ATTR(_name, S_IRUGO, iio_read_const_attr, NULL)}
+#define IIO_STATIC_CONST_DEVICE_ATTR(_name, _string) \
+ static ssize_t iio_const_dev_attr_show_##_name( \
+ struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+ { \
+ return sysfs_emit(buf, "%s\n", _string); \
+ } \
+ static IIO_DEVICE_ATTR(_name, 0444, \
+ iio_const_dev_attr_show_##_name, NULL, 0)
+
/* Generic attributes of onetype or another */
/**
Add IIO_STATIC_CONST_DEVICE_ATTR macro for creating an read-only iio_dev_attr which returns constant value. This macro is intended to be used when replacing the IIO_CONST_ATTR - attributes for triggered buffers because the triggered buffer attributes must be of type iio_dev_attr. Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com> --- I am not thrilled about how keyword 'static' is handled here but in my calendar this day seems to be called the day of the developer without working ideas. Feel free to suggest something if you guys have more luck with ideas. :) And I still think this macro is better than adding the summy 'show' callback in each individual driver :/ include/linux/iio/sysfs.h | 11 +++++++++++ 1 file changed, 11 insertions(+)