Device Tree on Raspberry Pi

[avanc]

Hello,

I wan to use the rotary_encoder driver of the Linux kernel: http://lxr.free-electrons.com/source/drivers/input/misc/rotary_encoder.c?v=3.12
It can be configured using device tree. However, I couldn't find any information if the Arch Linux kernel has support for device tree or even better device tree overlays.

During my search I found that the Raspbian kernel supports device tree. But I couldn't find a corresponding /boot/dt-blob.bin in the Arch Linux image.
In future overlays are also planned for Raspbian: https://github.com/raspberrypi/hats/blo ... e-guide.md

Can someone give me hints on the device tree support in Arch Linux? Do I have to compile the rotary encoder with hard-coded configuration?

Sven

[moonman]

While the bootloader is the same, and supports dtb (not tested by me), we don't have a dt-enabled kernel built in repos. You will have to rebuild kernel with dt support.
https://github.com/raspberrypi/linux/wi ... CH_BCM2708

[avanc]

Thanks for the information.
So there is no other way to configure the driver than by recompiling it and defining the configuration by hand in the code?