diff options
Diffstat (limited to 'tools/iio')
| -rw-r--r-- | tools/iio/generic_buffer.c | 9 | ||||
| -rw-r--r-- | tools/iio/iio_event_monitor.c | 6 |
2 files changed, 14 insertions, 1 deletions
diff --git a/tools/iio/generic_buffer.c b/tools/iio/generic_buffer.c index 9f7b85bf6..01c4f6780 100644 --- a/tools/iio/generic_buffer.c +++ b/tools/iio/generic_buffer.c @@ -328,6 +328,15 @@ int main(int argc, char **argv) "diag %s\n", dev_dir_name); goto error_free_triggername; } + if (!num_channels) { + fprintf(stderr, + "No channels are enabled, we have nothing to scan.\n"); + fprintf(stderr, "Enable channels manually in " + FORMAT_SCAN_ELEMENTS_DIR + "/*_en and try again.\n", dev_dir_name); + ret = -ENOENT; + goto error_free_triggername; + } /* * Construct the directory name for the associated buffer. diff --git a/tools/iio/iio_event_monitor.c b/tools/iio/iio_event_monitor.c index cd3fd41b4..d51eb0420 100644 --- a/tools/iio/iio_event_monitor.c +++ b/tools/iio/iio_event_monitor.c @@ -284,7 +284,11 @@ int main(int argc, char **argv) ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd); if (ret == -1 || event_fd == -1) { ret = -errno; - fprintf(stderr, "Failed to retrieve event fd\n"); + if (ret == -ENODEV) + fprintf(stderr, + "This device does not support events\n"); + else + fprintf(stderr, "Failed to retrieve event fd\n"); if (close(fd) == -1) perror("Failed to close character device file"); |