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authorHeiner Kallweit <hkallweit1@gmail.com>2016-03-04 16:11:40 -0300
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2016-03-05 08:22:03 -0300
commit02212001c95671969d3018691d384db16092eb27 (patch)
tree0f2d6a2c44ee1b55ffb4a19a6ee06ad4a15490e8 /Documentation/ABI
parentfcbafafb7da8dbfbb645ee22cc9fbd52d9553c12 (diff)
[media] media: rc: nuvoton: switch attribute wakeup_data to text
Switch attribute wakeup_data from binary to a text attribute. This makes it easier to handle in userspace and allows to use the output of tools like mode2 almost as is to set a wakeup sequence. Changing to a text format and values in microseconds also makes the userspace interface independent of the setting of SAMPLE_PERIOD in the driver. In addition document the new sysfs attribute in Documentation/ABI/testing/sysfs-class-rc-nuvoton. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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diff --git a/Documentation/ABI/testing/sysfs-class-rc-nuvoton b/Documentation/ABI/testing/sysfs-class-rc-nuvoton
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+What: /sys/class/rc/rcN/wakeup_data
+Date: Mar 2016
+KernelVersion: 4.6
+Contact: Mauro Carvalho Chehab <m.chehab@samsung.com>
+Description:
+ Reading this file returns the stored CIR wakeup sequence.
+ It starts with a pulse, followed by a space, pulse etc.
+ All values are in microseconds.
+ The same format can be used to store a wakeup sequence
+ in the Nuvoton chip by writing to this file.
+
+ Note: Some systems reset the stored wakeup sequence to a
+ factory default on each boot. On such systems store the
+ wakeup sequence in a file and set it on boot using e.g.
+ a udev rule.