systemd/hwdb/60-evdev.hwdb

# This file is part of systemd.
#
# The lookup keys are composed in:
#   60-evdev.rules
#
# Note: The format of the "evdev:" prefix match key is a
# contract between the rules file and the hardware data, it might
# change in later revisions to support more or better matches, it
# is not necessarily expected to be a stable ABI.
#
# Match string formats:
# evdev:<modalias>
# evdev:name:<device name>:dmi:<dmi string>
#
# To add local entries, create a new file
#   /etc/udev/hwdb.d/61-evdev-local.hwdb
# and add your rules there. To load the new rules execute (as root):
#   udevadm hwdb --update
#   udevadm trigger /dev/input/eventXX
# where /dev/input/eventXX is the device in question. If in
# doubt, simply use /dev/input/event* to reload all input rules.
#
# If your changes are generally applicable, open a bug report on
#   http://bugs.freedesktop.org/enter_bug.cgi?product=systemd
# and include your new rules, a description of the device, and the
# output of
#   udevadm info /dev/input/eventXX
# (or /dev/input/event*).
#
# Allowed properties are:
#    EVDEV_ABS_<axis>=<min>:<max>:<res>:<fuzz>:<flat>
#
# where <axis> is the hexadecimal EV_ABS code as listed in linux/input.h
# and min, max, res, fuzz, flat are the decimal values to the respective
# fields of the struct input_absinfo as listed in linux/input.h.
# If a field is missing the field will be left as-is. Not all fields need to
# be present. e.g. ::45 sets the resolution to 45 units/mm.
udev: builtin-keyboard: add support for EVDEV_ABS_* Parse properties in the form EVDEV_ABS_00="<min>:<max>:<res>:<fuzz>:<flat>" and apply them to the kernel device. Future processes that open that device will see the updated EV_ABS range. This is particularly useful for touchpads that don't provide a resolution in the kernel driver but can be fixed up through hwdb entries (e.g. bcm5974). All values in the property are optional, e.g. a string of "::45" is valid to set the resolution to 45. The order intentionally orders resolution before fuzz and flat despite it being the last element in the absinfo struct. The use-case for setting fuzz/flat is almost non-existent, resolution is probably the most common case we'll need. To avoid multiple hwdb invocations for the same device, replace the hwdb "keyboard:" prefix with "evdev:" and drop the separate 60-keyboard.rules file. The new 60-evdev.rules is called for all event nodes anyway, we don't need a separate rules file and second callout to the hwdb builtin. 2015-03-19 04:19:58 +00:00			`# This file is part of systemd.`
			`#`
			`# The lookup keys are composed in:`
			`# 60-evdev.rules`
			`#`
			`# Note: The format of the "evdev:" prefix match key is a`
			`# contract between the rules file and the hardware data, it might`
			`# change in later revisions to support more or better matches, it`
			`# is not necessarily expected to be a stable ABI.`
			`#`
			`# Match string formats:`
			`# evdev:<modalias>`
			`# evdev:name:<device name>:dmi:<dmi string>`
			`#`
			`# To add local entries, create a new file`
			`# /etc/udev/hwdb.d/61-evdev-local.hwdb`
			`# and add your rules there. To load the new rules execute (as root):`
			`# udevadm hwdb --update`
			`# udevadm trigger /dev/input/eventXX`
			`# where /dev/input/eventXX is the device in question. If in`
			`# doubt, simply use /dev/input/event* to reload all input rules.`
			`#`
			`# If your changes are generally applicable, open a bug report on`
			`# http://bugs.freedesktop.org/enter_bug.cgi?product=systemd`
			`# and include your new rules, a description of the device, and the`
			`# output of`
			`# udevadm info /dev/input/eventXX`
			`# (or /dev/input/event*).`
			`#`
			`# Allowed properties are:`
			`# EVDEV_ABS_<axis>=<min>:<max>:<res>:<fuzz>:<flat>`
			`#`
			`# where <axis> is the hexadecimal EV_ABS code as listed in linux/input.h`
			`# and min, max, res, fuzz, flat are the decimal values to the respective`
			`# fields of the struct input_absinfo as listed in linux/input.h.`
			`# If a field is missing the field will be left as-is. Not all fields need to`
			`# be present. e.g. ::45 sets the resolution to 45 units/mm.`