linux gadget hid driver insert error
 

Hi All

I am building the HID Composite Driver from the link below
http://lxr.free-electrons.com/source...et/hid.c?a=arm

The module build successfully but when i insert the module using insmod i got the following error:
insmod: error inserting './hid.ko': -1 Invalid parameters

Anyone have any idea about how to fix this issue?

It seems that there are some issues in the build due to which invalid parameters error came up.

Now the invalid parameters error is gone but getting following error:
insmod: error inserting './g_hid.ko': -1 No such device

Anyone have any idea to solve this issue???

Problem Solved.

step1: go to the link below.
http://www.mjmwired.net/kernel/Docum...gadget_hid.txt

step2: copy the following two structures from the above link and paste into hid.c
hidg_func_descriptor
platform_device

step3: compile the hid module

step4: load the module

That's it.

hi Ma1,
your solution seems did not work for me.
I followed your steps, and it still failed with

"insmod: error inserting './g_hid.ko': -1 Invalid module format"

then, I found out the kernel that I am building is not the same version as the one I run the insmod command, so I rebuilt again.

but this time, I got

"insmod: error inserting './g_hid.ko': -1 No such device"

what could I be wrong? can you help?

also, both situations, I got message

"drivers/usb/gadget/hid.c:159:31: warning: ‘my_hid’ defined but not used [-Wunused-variable]"

from compiler, does this means the two structures added has not been used at all?



Cheers,