Hi, Id really appreciate a bit of hand-holding here! I am struggling to understand the process of installing custom drivers in to the system.

I am trying to get a Quectel modem working, and have been provided various drivers from the manufacturer.

The files provided are a folder with a Makefile and folder structure /drivers/usb/serial/option.c, qserial.c, usb-wwan.h, usb_wwan.c

The Makefile is as follows:

KERNELDIR := /lib/modules/$(shell uname -r)/build
PWD := $(shell pwd)

obj-m+=./drivers/usb/serial/option.o
obj-m+=./drivers/usb/serial/usb_wwan.o
obj-m+=./drivers/usb/serial/qcserial.o

modules: clean
$(MAKE) -C $(KERNELDIR) M=$(PWD) modules

install: modules
cp $(PWD)/drivers/usb/serial/*.ko /lib/modules/$(shell uname -r)/kernel/drivers/usb/serial/
depmod

clean:
rm -rf *~ .tmp_versions modules.order Module.symvers
find . -type f -name *~ -o -name *.o -o -name *.ko -o -name *.cmd -o -name *.mod.c | xargs rm -rf

I am getting a lot of errors if I try make / make install command.

ake[1]: *** /lib/modules/5.15.6-200.fc35.x86_64/build: No such file or directory. Stop.

I think I half-understand what is happening, I have been trying to fix this with sim-link and have downloaded kernel-devel so I now have something in /usr/src/kernels/

But to be honest if anyone has the time I would really appreciated a step by step instructions to help me understand. I am still learning and something as 'simple' as installing drivers has got me a bit stuck.

I believe I am on the right track roughly but could really do with some help.

The guide I was trying to follow is section 3.6 of the following:
https://sixfab.com/wp-content/upload...Guide_V2.0.pdf

Thank you in advance for your time.

What distro are you trying to do this on?
And which exact model do you have there? What do you want to do with it? Just connect to the internet? Have you considered that your system might just recognize it? Did you do any sort of initial troubleshooting when you first connected the device, or after a reboot?
If this is a desktop distro, network-managers modemmanager is as good as it gets.

FWIW, a quick search gives a few relevant-looking results. Most notably, Quectel have their own forums with Linux questions.

would be much better to use code tags. Otherwise hard to read those makefiles.
here you can find some info: https://www.kernel.org/doc/html/late...d/modules.html

So, could you build the driver after that?