0001 What: /sys/class/rc/
0002 Date: Apr 2010
0003 KernelVersion: 2.6.35
0004 Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
0005 Description:
0006 The rc/ class sub-directory belongs to the Remote Controller
0007 core and provides a sysfs interface for configuring infrared
0008 remote controller receivers.
0009
0010 What: /sys/class/rc/rc<N>/
0011 Date: Apr 2010
0012 KernelVersion: 2.6.35
0013 Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
0014 Description:
0015 A /sys/class/rc/rcN directory is created for each remote
0016 control receiver device where N is the number of the receiver.
0017
0018 What: /sys/class/rc/rc<N>/protocols
0019 Date: Jun 2010
0020 KernelVersion: 2.6.36
0021 Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
0022 Description:
0023 Reading this file returns a list of available protocols,
0024 something like::
0025
0026 "rc5 [rc6] nec jvc [sony]"
0027
0028 Enabled protocols are shown in [] brackets.
0029
0030 Writing "+proto" will add a protocol to the list of enabled
0031 protocols.
0032
0033 Writing "-proto" will remove a protocol from the list of enabled
0034 protocols.
0035
0036 Writing "proto" will enable only "proto".
0037
0038 Writing "none" will disable all protocols.
0039
0040 Write fails with EINVAL if an invalid protocol combination or
0041 unknown protocol name is used.
0042
0043 What: /sys/class/rc/rc<N>/filter
0044 Date: Jan 2014
0045 KernelVersion: 3.15
0046 Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
0047 Description:
0048 Sets the scancode filter expected value.
0049
0050 Use in combination with /sys/class/rc/rcN/filter_mask to set the
0051 expected value of the bits set in the filter mask.
0052 If the hardware supports it then scancodes which do not match
0053 the filter will be ignored. Otherwise the write will fail with
0054 an error.
0055
0056 This value may be reset to 0 if the current protocol is altered.
0057
0058 What: /sys/class/rc/rc<N>/filter_mask
0059 Date: Jan 2014
0060 KernelVersion: 3.15
0061 Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
0062 Description:
0063 Sets the scancode filter mask of bits to compare.
0064 Use in combination with /sys/class/rc/rcN/filter to set the bits
0065 of the scancode which should be compared against the expected
0066 value. A value of 0 disables the filter to allow all valid
0067 scancodes to be processed.
0068
0069 If the hardware supports it then scancodes which do not match
0070 the filter will be ignored. Otherwise the write will fail with
0071 an error.
0072
0073 This value may be reset to 0 if the current protocol is altered.
0074
0075 What: /sys/class/rc/rc<N>/wakeup_protocols
0076 Date: Feb 2017
0077 KernelVersion: 4.11
0078 Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
0079 Description:
0080 Reading this file returns a list of available protocols to use
0081 for the wakeup filter, something like::
0082
0083 "rc-5 nec nec-x rc-6-0 rc-6-6a-24 [rc-6-6a-32] rc-6-mce"
0084
0085 Note that protocol variants are listed, so "nec", "sony",
0086 "rc-5", "rc-6" have their different bit length encodings
0087 listed if available.
0088
0089 The enabled wakeup protocol is shown in [] brackets.
0090
0091 Only one protocol can be selected at a time.
0092
0093 Writing "proto" will use "proto" for wakeup events.
0094
0095 Writing "none" will disable wakeup.
0096
0097 Write fails with EINVAL if an invalid protocol combination or
0098 unknown protocol name is used, or if wakeup is not supported by
0099 the hardware.
0100
0101 What: /sys/class/rc/rc<N>/wakeup_filter
0102 Date: Jan 2014
0103 KernelVersion: 3.15
0104 Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
0105 Description:
0106 Sets the scancode wakeup filter expected value.
0107
0108 Use in combination with /sys/class/rc/rcN/wakeup_filter_mask to
0109 set the expected value of the bits set in the wakeup filter mask
0110 to trigger a system wake event.
0111
0112 If the hardware supports it and wakeup_filter_mask is not 0 then
0113 scancodes which match the filter will wake the system from e.g.
0114 suspend to RAM or power off.
0115
0116 Otherwise the write will fail with an error.
0117
0118 This value may be reset to 0 if the wakeup protocol is altered.
0119
0120 What: /sys/class/rc/rc<N>/wakeup_filter_mask
0121 Date: Jan 2014
0122 KernelVersion: 3.15
0123 Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
0124 Description:
0125 Sets the scancode wakeup filter mask of bits to compare.
0126
0127 Use in combination with /sys/class/rc/rcN/wakeup_filter to set
0128 the bits of the scancode which should be compared against the
0129 expected value to trigger a system wake event.
0130
0131 If the hardware supports it and wakeup_filter_mask is not 0 then
0132 scancodes which match the filter will wake the system from e.g.
0133 suspend to RAM or power off.
0134
0135 Otherwise the write will fail with an error.
0136
0137 This value may be reset to 0 if the wakeup protocol is altered.
