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I have written my gpio driver and register it with the system using udev. This created all my device files but the permission they are created is 600. how can I change this default permission to 666 or any other. Since I have to run my program reading this file using sudo.

Should i write any rules in udev.. please explain. Or should i change operating permission of my program within my program itself to root.

Update: my udev rules.d contains

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:

udev_log="err"
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