diff options
Diffstat (limited to 'nuttx/drivers/sensors/qencoder.c')
| -rw-r--r-- | nuttx/drivers/sensors/qencoder.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/nuttx/drivers/sensors/qencoder.c b/nuttx/drivers/sensors/qencoder.c index edbe8255c..84bc15813 100644 --- a/nuttx/drivers/sensors/qencoder.c +++ b/nuttx/drivers/sensors/qencoder.c @@ -365,7 +365,13 @@ static int qe_ioctl(FAR struct file *filep, int cmd, unsigned long arg) * lower - An instance of the lower half interface * * Returned Value: - * Zero (OK) on success; a negated errno value on failure. + * Zero (OK) on success; a negated errno value on failure. The following + * possible error values may be returned (most are returned by + * register_driver()): + * + * EINVAL - 'path' is invalid for this operation + * EEXIST - An inode already exists at 'path' + * ENOMEM - Failed to allocate in-memory resources for the operation * ****************************************************************************/ |