ukbd(4): Support for input event interface

[wulf_cicgroup.ru]

Summary

Adds support for input event interface in ukbd(4) driver

At present time evdev module is tuned to prefer sysmouse and kbdmux event devices so ukbd`s eventX cdev will be silent until sysctl kern.evdev.rcpt_mask=12 is executed

Known bug: Keymap reading/writing is not implemented
Last minor change (checking evdev pointer for NULL before event pushing) has not been tested "in hardware".

[• hselasky]

sys/dev/usb/input/ukbd.c

367 ↗

(On Diff #20509)

Should this structure be "static const" instead of "static" ?

[gonzo]

sys/dev/usb/input/ukbd.c

367 ↗

(On Diff #20509)

evdev_set_methods accepts non-const pointer, it probably should be fixed in evdev API. I'll commit this patch as-is and we'll fix it along with dev/evdev

[wulf_cicgroup.ru]

For reasons unclear to me FreeBSD does not use const modifier in similar cases. Grep sources for e.g. struct fileops, struct vop_vector, struct cdevsw, struct filterops declarations.

[imp]

In D7957#165311, @wulf_cicgroup.ru wrote:

For reasons unclear to me FreeBSD does not use const modifier in similar cases. Grep sources for e.g. struct fileops, struct vop_vector, struct cdevsw, struct filterops declarations.

All the examples you quoted, with the possible exception of filterops, predate wide-spread compiler support for const and simply haven't been updated.