CODEWITHSUNDEEP
linux-kerneldriverlinux-device-driver
Saleh
Saleh

Reputation: 1931

Linux kernel : Remove input handler from a driver

when I see the output of cat /proc/bus/input/devices I see this:

I: Bus=0010 Vendor=0001 Product=0001 Version=0100
N: Name="aml_keypad"
P: Phys=keypad/input0
S: Sysfs=/devices/c8100580.rc/input/input0
U: Uniq=
H: Handlers=kbd mouse0 event0 
B: PROP=0
B: EV=7
B: KEY=7fffffffffffffff ffffffffffffffff ffffffffffffffff ffffffffffffffff ffffffffffffffff ffffffffffffffff ffffffffffffffff ffffffffffffffff ffffffffffffffff ffffffffffffffff ffffffffffffffff fffffffffffffffe
B: REL=103

How can I remove a handler from the driver. (I am compiling the kernel for myself)

For example I want to remove mouse0 from handlers

Upvotes: 1

Views: 566

Answers (1)

Saleh
Saleh

Reputation: 1931

In order to remove handler it is just enough to comment the related _set_bit in the driver source code. In my case :

// __set_bit(BTN_MOUSE, dev->input_device->keybit);
// __set_bit(BTN_LEFT, dev->input_device->keybit);
// __set_bit(BTN_RIGHT, dev->input_device->keybit);
// __set_bit(BTN_MIDDLE, dev->input_device->keybit);
//
// __set_bit(EV_REL, dev->input_device->evbit);
// __set_bit(REL_X, dev->input_device->relbit);
// __set_bit(REL_Y, dev->input_device->relbit);
// __set_bit(REL_WHEEL, dev->input_device->relbit);

The above snippet is part of this file.

Upvotes: 1

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