USB hiddev minor device numbering can be dynamic, in which case the minor be any number from 0 to 255. This is defined in drivers/hid/usbhid/hiddev.c. Signed-off-by: Thomas Guyot-Sionnest <tguyot@xxxxxxxxx> --- Documentation/hid/hiddev.rst | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Documentation/hid/hiddev.rst b/Documentation/hid/hiddev.rst index caebc6266603..9647210cdd34 100644 --- a/Documentation/hid/hiddev.rst +++ b/Documentation/hid/hiddev.rst @@ -54,6 +54,13 @@ you need the following commands:: mknod /dev/usb/hiddev14 c 180 110 mknod /dev/usb/hiddev15 c 180 111 +When using CONFIG_USB_DYNAMIC_MINORS you should let udev create these +devices automatically. They will have a minor ranging from 0 to 255. +You can find the actual major:minor in the /sys tree under the usbmisc +class. You can list them with:: + + grep -H . /sys/class/usbmisc/hiddev*/dev + So you point your hiddev compliant user-space program at the correct interface for your device, and it all just works. -- 2.30.2
