summaryrefslogtreecommitdiffstats
path: root/Documentation/userspace-api/media/rc/lirc-get-timeout.rst
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/userspace-api/media/rc/lirc-get-timeout.rst')
-rw-r--r--Documentation/userspace-api/media/rc/lirc-get-timeout.rst57
1 files changed, 57 insertions, 0 deletions
diff --git a/Documentation/userspace-api/media/rc/lirc-get-timeout.rst b/Documentation/userspace-api/media/rc/lirc-get-timeout.rst
new file mode 100644
index 000000000..f5f3e06d6
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/lirc-get-timeout.rst
@@ -0,0 +1,57 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: RC
+
+.. _lirc_get_min_timeout:
+.. _lirc_get_max_timeout:
+
+****************************************************
+ioctls LIRC_GET_MIN_TIMEOUT and LIRC_GET_MAX_TIMEOUT
+****************************************************
+
+Name
+====
+
+LIRC_GET_MIN_TIMEOUT / LIRC_GET_MAX_TIMEOUT - Obtain the possible timeout
+range for IR receive.
+
+Synopsis
+========
+
+.. c:macro:: LIRC_GET_MIN_TIMEOUT
+
+``int ioctl(int fd, LIRC_GET_MIN_TIMEOUT, __u32 *timeout)``
+
+.. c:macro:: LIRC_GET_MAX_TIMEOUT
+
+``int ioctl(int fd, LIRC_GET_MAX_TIMEOUT, __u32 *timeout)``
+
+Arguments
+=========
+
+``fd``
+ File descriptor returned by open().
+
+``timeout``
+ Timeout, in microseconds.
+
+Description
+===========
+
+Some devices have internal timers that can be used to detect when
+there's no IR activity for a long time. This can help lircd in
+detecting that a IR signal is finished and can speed up the decoding
+process. Returns an integer value with the minimum/maximum timeout
+that can be set.
+
+.. note::
+
+ Some devices have a fixed timeout, in that case
+ both ioctls will return the same value even though the timeout
+ cannot be changed via :ref:`LIRC_SET_REC_TIMEOUT`.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.