I made a development environment by connecting the Touch Input device to the x20 board through I2C.
The purpose is to activate HID over I2C and receive touch coordinates through HID descriptor.
I looked at the “HID Over I2C Protocol Specification.docx” document provided by microsoft and the documents related to x20, but since I am a beginner, I am not sure what to start with.
Can anyone please help me on how to approach it for beginners?
This is what you are looking for;
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/hid/i2c-hid?h=v5.8
You need to add the driver to your kernel build using CONFIG_I2C_HID=y
And you will need to add a node to your devicetree by following the instructions;
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/input/hid-over-i2c.txt?h=v5.8
Thanks for the help. It feels like the fog is clearing.
I will try based on the method you suggested.
And, I have one more question.
The kernel I am using is v3.18, but does hid over i2c not work in the old version?
If the driver is present in the source, should be fine.
