Device Driver

dlh · 06-19-2012, 06:58 AM

Hi,

I am having trouble finding info which clearly states what files of existing drivers are hardware dependent. Is there a clear defined process for porting drivers to new hardware?

Say, for example, I want to write a SPI driver for a new chip with on board SPI hardware. What files do I need to alter to do this?

Thanks

nini09 · 06-19-2012, 02:37 PM

You should creart a new file for the SPI driver and modify it to match with your hardware.

agencyDetective · 06-26-2012, 08:16 AM

Write the driver as normal - the only difference is in how the linux kernel access the driver routines.
Look at another driver source and copy it.
This is linux version dependent but normally its a static structure called dev that has function pointers to the driver routines.
Then you have to install it and linux will pick up the structure and be able to call the driver when needed.

Basically just copy how its been done in the distro you have - the trouble is its always changing as is linux