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0751d33c27
For IR wakeup, a driver has to program the hardware to wakeup at a specific IR sequence, so it makes no sense to allow multiple wakeup protocols to be selected. In the same manner the sysfs interface only allows one scancode to be provided. In addition, we need to know the specific variant of the protocol. In short, these changes are made to the wakeup_protocols sysfs entry: - list all the protocol variants rather than the protocol groups, e.g. "nec nec-x nec-32" rather than just "nec". - only allow one protocol variant to be selected rather than multiple - wakeup_filter can only be set once a protocol has been selected in wakeup_protocols. This is an API change, however the only user of this API is the img-ir, but the wakeup code was never merged to mainline, so it was never used. Signed-off-by: Sean Young <sean@mess.org> Cc: James Hogan <james.hogan@imgtec.com> Cc: Sifan Naeem <sifan.naeem@imgtec.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
145 lines
4.2 KiB
ReStructuredText
145 lines
4.2 KiB
ReStructuredText
.. -*- coding: utf-8; mode: rst -*-
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.. _remote_controllers_sysfs_nodes:
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*******************************
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Remote Controller's sysfs nodes
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*******************************
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As defined at ``Documentation/ABI/testing/sysfs-class-rc``, those are
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the sysfs nodes that control the Remote Controllers:
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.. _sys_class_rc:
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/sys/class/rc/
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==============
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The ``/sys/class/rc/`` class sub-directory belongs to the Remote
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Controller core and provides a sysfs interface for configuring infrared
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remote controller receivers.
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.. _sys_class_rc_rcN:
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/sys/class/rc/rcN/
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==================
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A ``/sys/class/rc/rcN`` directory is created for each remote control
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receiver device where N is the number of the receiver.
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.. _sys_class_rc_rcN_protocols:
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/sys/class/rc/rcN/protocols
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===========================
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Reading this file returns a list of available protocols, something like:
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``rc5 [rc6] nec jvc [sony]``
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Enabled protocols are shown in [] brackets.
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Writing "+proto" will add a protocol to the list of enabled protocols.
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Writing "-proto" will remove a protocol from the list of enabled
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protocols.
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Writing "proto" will enable only "proto".
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Writing "none" will disable all protocols.
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Write fails with ``EINVAL`` if an invalid protocol combination or unknown
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protocol name is used.
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.. _sys_class_rc_rcN_filter:
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/sys/class/rc/rcN/filter
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========================
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Sets the scancode filter expected value.
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Use in combination with ``/sys/class/rc/rcN/filter_mask`` to set the
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expected value of the bits set in the filter mask. If the hardware
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supports it then scancodes which do not match the filter will be
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ignored. Otherwise the write will fail with an error.
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This value may be reset to 0 if the current protocol is altered.
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.. _sys_class_rc_rcN_filter_mask:
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/sys/class/rc/rcN/filter_mask
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=============================
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Sets the scancode filter mask of bits to compare. Use in combination
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with ``/sys/class/rc/rcN/filter`` to set the bits of the scancode which
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should be compared against the expected value. A value of 0 disables the
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filter to allow all valid scancodes to be processed.
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If the hardware supports it then scancodes which do not match the filter
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will be ignored. Otherwise the write will fail with an error.
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This value may be reset to 0 if the current protocol is altered.
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.. _sys_class_rc_rcN_wakeup_protocols:
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/sys/class/rc/rcN/wakeup_protocols
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==================================
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Reading this file returns a list of available protocols to use for the
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wakeup filter, something like:
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``rc-5 nec nec-x rc-6-0 rc-6-6a-24 [rc-6-6a-32] rc-6-mce``
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Note that protocol variants are listed, so "nec", "sony", "rc-5", "rc-6"
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have their different bit length encodings listed if available.
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Note that all protocol variants are listed.
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The enabled wakeup protocol is shown in [] brackets.
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Only one protocol can be selected at a time.
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Writing "proto" will use "proto" for wakeup events.
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Writing "none" will disable wakeup.
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Write fails with ``EINVAL`` if an invalid protocol combination or unknown
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protocol name is used, or if wakeup is not supported by the hardware.
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.. _sys_class_rc_rcN_wakeup_filter:
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/sys/class/rc/rcN/wakeup_filter
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===============================
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Sets the scancode wakeup filter expected value. Use in combination with
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``/sys/class/rc/rcN/wakeup_filter_mask`` to set the expected value of
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the bits set in the wakeup filter mask to trigger a system wake event.
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If the hardware supports it and wakeup_filter_mask is not 0 then
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scancodes which match the filter will wake the system from e.g. suspend
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to RAM or power off. Otherwise the write will fail with an error.
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This value may be reset to 0 if the wakeup protocol is altered.
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.. _sys_class_rc_rcN_wakeup_filter_mask:
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/sys/class/rc/rcN/wakeup_filter_mask
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====================================
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Sets the scancode wakeup filter mask of bits to compare. Use in
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combination with ``/sys/class/rc/rcN/wakeup_filter`` to set the bits of
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the scancode which should be compared against the expected value to
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trigger a system wake event.
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If the hardware supports it and wakeup_filter_mask is not 0 then
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scancodes which match the filter will wake the system from e.g. suspend
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to RAM or power off. Otherwise the write will fail with an error.
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This value may be reset to 0 if the wakeup protocol is altered.
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