Merge tag 'iio-fixes-for-3.16d' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus

Jonathan writes:

4th set of fixes for IIO in the 3.16 cycle

* Fix incorrect handling of the iio_event_spec mask_shared_by_type
  bitmap. The point of this was to allow multiple channels to specify
  elements that lead to the same sysfs attribute.  A but in the handling
  meant that this failed.  The handling is modified to be similar to that
  used for the main IIO info_mask_shared_by_type which works correclty.
* The acceleration scale factors reported by the mma8452 driver gave
  accelerations in g, wherease the IIO ABI is in m/s^2. The fix simply
  corrects the reported scale factors.

2 files changed, 10 insertions, 1 deletions

diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c
index 17aeea170566..2a5fa9a436e5 100644
--- a/drivers/iio/accel/mma8452.c
+++ b/drivers/iio/accel/mma8452.c
@@ -111,8 +111,14 @@ static const int mma8452_samp_freq[8][2] = {
         {6, 250000}, {1, 560000}
 };
 
+/* 
+ * Hardware has fullscale of -2G, -4G, -8G corresponding to raw value -2048
+ * The userspace interface uses m/s^2 and we declare micro units
+ * So scale factor is given by:
+ *      g * N * 1000000 / 2048 for N = 2, 4, 8 and g=9.80665
+ */
 static const int mma8452_scales[3][2] = {
-        {0, 977}, {0, 1953}, {0, 3906}
+        {0, 9577}, {0, 19154}, {0, 38307}
 };
 
 static ssize_t mma8452_show_samp_freq_avail(struct device *dev,
diff --git a/drivers/iio/industrialio-event.c b/drivers/iio/industrialio-event.c
index 258a973a1fb8..bfbf4d419f41 100644
--- a/drivers/iio/industrialio-event.c
+++ b/drivers/iio/industrialio-event.c
@@ -345,6 +345,9 @@ static int iio_device_add_event(struct iio_dev *indio_dev,
                         &indio_dev->event_interface->dev_attr_list);
                 kfree(postfix);
 
+                if ((ret == -EBUSY) && (shared_by != IIO_SEPARATE))
+                        continue;
+
                 if (ret)
                         return ret;