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| author | Sean Young <sean@mess.org> | 2017-02-25 14:51:34 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-12-14 18:35:21 +0300 |
| commit | 7d402db89b5b6d3ca5128937dc04653df8668978 (patch) | |
| tree | 7d5f59455770fa8051df0874ea5ecf24c11619c9 /Documentation/media/uapi/rc/lirc-read.rst | |
| parent | b66218fddfd29f315a103db811152ab0c95fb054 (diff) | |
| download | linux-7d402db89b5b6d3ca5128937dc04653df8668978.tar.xz | |
media: lirc: document LIRC_MODE_SCANCODE
Lirc supports a new mode which requires documentation.
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'Documentation/media/uapi/rc/lirc-read.rst')
| -rw-r--r-- | Documentation/media/uapi/rc/lirc-read.rst | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/Documentation/media/uapi/rc/lirc-read.rst b/Documentation/media/uapi/rc/lirc-read.rst index ff14a69104e5..51d37ed10194 100644 --- a/Documentation/media/uapi/rc/lirc-read.rst +++ b/Documentation/media/uapi/rc/lirc-read.rst @@ -45,13 +45,20 @@ descriptor ``fd`` into the buffer starting at ``buf``. If ``count`` is zero, is greater than ``SSIZE_MAX``, the result is unspecified. The exact format of the data depends on what :ref:`lirc_modes` a driver -uses. Use :ref:`lirc_get_features` to get the supported mode. +uses. Use :ref:`lirc_get_features` to get the supported mode, and use +:ref:`lirc_set_rec_mode` set the current active mode. -The generally preferred mode for receive is -:ref:`LIRC_MODE_MODE2 <lirc-mode-mode2>`, -in which packets containing an int value describing an IR signal are +The mode :ref:`LIRC_MODE_MODE2 <lirc-mode-mode2>` is for raw IR, +in which packets containing an unsigned int value describing an IR signal are read from the chardev. +Alternatively, :ref:`LIRC_MODE_SCANCODE <lirc-mode-scancode>` can be available, +in this mode scancodes which are either decoded by software decoders, or +by hardware decoders. The ``rc_proto`` member is set to the +protocol used for transmission, and ``scancode`` to the decoded scancode, +and the ``keycode`` set to the keycode or ``KEY_RESERVED``. + + Return Value ============ |