linux - Change default permission of device files -

linux - Change default permission of device files -

i have written gpio driver , register scheme using udev. created device files permission created 600. how can alter default permission 666 or other. since have run programme reading file using sudo.

should write rules in udev.. please explain. or should alter operating permission of programme within programme root.

edit: udev rules.d

40-scratch.rules:

attrs{idvendor}=="0694", attrs{idproduct}=="0003", subsystems=="usb", action=="add", mode="0666", group="plugdev"

and 99-input.rules:

subsystem=="input", group="input", mode="0660"

and udev.conf contains:

udev_log="err"

thanks.

linux permissions linux-kernel linux-device-driver udev