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Linux - Embedded & Single-board computer This forum is for the discussion of Linux on both embedded devices and single-board computers (such as the Raspberry Pi, BeagleBoard and PandaBoard). Discussions involving Arduino, plug computers and other micro-controller like devices are also welcome.

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Old 04-08-2018, 10:35 AM   #1
Jim232
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ioctl - module or driver?


I am finally making progress using ioctl to access I2C device.
Among other resources I have been using A. Rubini's " Linux device drivers".

He describes ioctl function as "communicator module " - my interpretation.

I am under the impression that "modules" are part of Linux OS - outside kernel.

Am I being too picky or is there a real difference between native Linux "stuff" and drivers(s) build specifically for a device and not relying on the OS?
 
Old 04-08-2018, 06:23 PM   #2
syg00
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Modules are extensions of the kernel - once loaded they are kernel code.
Reduces the need to bloat the kernel for everyone, but allow those that need the functionality to get it simply.
 
  


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