Hello, I am using Centos (both Centos 6 and 7) on a Raspberry PI. I am trying to connect an AD-converter board to it with USB. (Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC) So I'd probably need some kernel module/driver. (I have the src for the driver, ftdi_sio. I installed the kernel-headers, but the version of it seems different from the kernel? gcc -Wall -D__KERNEL__ -DMODULE -I/lib/modules/3.18.14-v7+/build/include -I/usr/src/linux-3.18.14-v7+/drivers/usb/serial/ -O -c -o ftdi_sio.o ftdi_sio.c ftdi_sio.c:253:24: fatal error: linux/init.h: No such file or directory #include <linux/init.h> [xxxx at rpi2-1 ftdi_sio]# find / -name "init.h" /usr/src/kernels/4.2.0-0.rc2.git0.1.centos.el7.armv7hl/include/linux/init.h /usr/src/kernels/4.2.0-0.rc2.git0.1.centos.el7.armv7hl/include/config/omap2/dss/init.h /usr/src/kernels/4.2.0-0.rc2.git0.1.centos.el7.armv7hl/include/config/debug/memory/init.h /usr/include/mysql/private/init.h Is there a driver, or kernel module, available that I can just use? If not, how to compile the src of that driver? thanks, Ron